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, 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 { 1920 nfsvno_relpathbuf(ndp); 1921 if (create == NFSV4OPEN_CREATE) { 1922 if (ndp->ni_dvp == ndp->ni_vp) 1923 vrele(ndp->ni_dvp); 1924 else 1925 vput(ndp->ni_dvp); 1926 if (ndp->ni_vp) 1927 vput(ndp->ni_vp); 1928 } 1929 } 1930 *vpp = vp; 1931 1932 NFSEXITCODE2(0, nd); 1933 } 1934 1935 /* 1936 * Updates the file rev and sets the mtime and ctime 1937 * to the current clock time, returning the va_filerev and va_Xtime 1938 * values. 1939 * Return ESTALE to indicate the vnode is VIRF_DOOMED. 1940 */ 1941 int 1942 nfsvno_updfilerev(struct vnode *vp, struct nfsvattr *nvap, 1943 struct nfsrv_descript *nd, struct thread *p) 1944 { 1945 struct vattr va; 1946 1947 VATTR_NULL(&va); 1948 vfs_timestamp(&va.va_mtime); 1949 if (NFSVOPISLOCKED(vp) != LK_EXCLUSIVE) { 1950 NFSVOPLOCK(vp, LK_UPGRADE | LK_RETRY); 1951 if (VN_IS_DOOMED(vp)) 1952 return (ESTALE); 1953 } 1954 (void) VOP_SETATTR(vp, &va, nd->nd_cred); 1955 (void) nfsvno_getattr(vp, nvap, nd, p, 1, NULL); 1956 return (0); 1957 } 1958 1959 /* 1960 * Glue routine to nfsv4_fillattr(). 1961 */ 1962 int 1963 nfsvno_fillattr(struct nfsrv_descript *nd, struct mount *mp, struct vnode *vp, 1964 struct nfsvattr *nvap, fhandle_t *fhp, int rderror, nfsattrbit_t *attrbitp, 1965 struct ucred *cred, struct thread *p, int isdgram, int reterr, 1966 int supports_nfsv4acls, int at_root, uint64_t mounted_on_fileno) 1967 { 1968 struct statfs *sf; 1969 int error; 1970 1971 sf = NULL; 1972 if (nfsrv_devidcnt > 0 && 1973 (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_SPACEAVAIL) || 1974 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_SPACEFREE) || 1975 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_SPACETOTAL))) { 1976 sf = malloc(sizeof(*sf), M_TEMP, M_WAITOK | M_ZERO); 1977 error = nfsrv_pnfsstatfs(sf, mp); 1978 if (error != 0) { 1979 free(sf, M_TEMP); 1980 sf = NULL; 1981 } 1982 } 1983 error = nfsv4_fillattr(nd, mp, vp, NULL, &nvap->na_vattr, fhp, rderror, 1984 attrbitp, cred, p, isdgram, reterr, supports_nfsv4acls, at_root, 1985 mounted_on_fileno, sf); 1986 free(sf, M_TEMP); 1987 NFSEXITCODE2(0, nd); 1988 return (error); 1989 } 1990 1991 /* Since the Readdir vnode ops vary, put the entire functions in here. */ 1992 /* 1993 * nfs readdir service 1994 * - mallocs what it thinks is enough to read 1995 * count rounded up to a multiple of DIRBLKSIZ <= NFS_MAXREADDIR 1996 * - calls VOP_READDIR() 1997 * - loops around building the reply 1998 * if the output generated exceeds count break out of loop 1999 * The NFSM_CLGET macro is used here so that the reply will be packed 2000 * tightly in mbuf clusters. 2001 * - it trims out records with d_fileno == 0 2002 * this doesn't matter for Unix clients, but they might confuse clients 2003 * for other os'. 2004 * - it trims out records with d_type == DT_WHT 2005 * these cannot be seen through NFS (unless we extend the protocol) 2006 * The alternate call nfsrvd_readdirplus() does lookups as well. 2007 * PS: The NFS protocol spec. does not clarify what the "count" byte 2008 * argument is a count of.. just name strings and file id's or the 2009 * entire reply rpc or ... 2010 * I tried just file name and id sizes and it confused the Sun client, 2011 * so I am using the full rpc size now. The "paranoia.." comment refers 2012 * to including the status longwords that are not a part of the dir. 2013 * "entry" structures, but are in the rpc. 2014 */ 2015 int 2016 nfsrvd_readdir(struct nfsrv_descript *nd, int isdgram, 2017 struct vnode *vp, struct nfsexstuff *exp) 2018 { 2019 struct dirent *dp; 2020 u_int32_t *tl; 2021 int dirlen; 2022 char *cpos, *cend, *rbuf; 2023 struct nfsvattr at; 2024 int nlen, error = 0, getret = 1; 2025 int siz, cnt, fullsiz, eofflag, ncookies; 2026 u_int64_t off, toff, verf __unused; 2027 uint64_t *cookies = NULL, *cookiep; 2028 struct uio io; 2029 struct iovec iv; 2030 int is_ufs; 2031 struct thread *p = curthread; 2032 2033 if (nd->nd_repstat) { 2034 nfsrv_postopattr(nd, getret, &at); 2035 goto out; 2036 } 2037 if (nd->nd_flag & ND_NFSV2) { 2038 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2039 off = fxdr_unsigned(u_quad_t, *tl++); 2040 } else { 2041 NFSM_DISSECT(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2042 off = fxdr_hyper(tl); 2043 tl += 2; 2044 verf = fxdr_hyper(tl); 2045 tl += 2; 2046 } 2047 toff = off; 2048 cnt = fxdr_unsigned(int, *tl); 2049 if (cnt > NFS_SRVMAXDATA(nd) || cnt < 0) 2050 cnt = NFS_SRVMAXDATA(nd); 2051 siz = ((cnt + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 2052 fullsiz = siz; 2053 if (nd->nd_flag & ND_NFSV3) { 2054 nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd, p, 1, 2055 NULL); 2056 #if 0 2057 /* 2058 * va_filerev is not sufficient as a cookie verifier, 2059 * since it is not supposed to change when entries are 2060 * removed/added unless that offset cookies returned to 2061 * the client are no longer valid. 2062 */ 2063 if (!nd->nd_repstat && toff && verf != at.na_filerev) 2064 nd->nd_repstat = NFSERR_BAD_COOKIE; 2065 #endif 2066 } 2067 if (!nd->nd_repstat && vp->v_type != VDIR) 2068 nd->nd_repstat = NFSERR_NOTDIR; 2069 if (nd->nd_repstat == 0 && cnt == 0) { 2070 if (nd->nd_flag & ND_NFSV2) 2071 /* NFSv2 does not have NFSERR_TOOSMALL */ 2072 nd->nd_repstat = EPERM; 2073 else 2074 nd->nd_repstat = NFSERR_TOOSMALL; 2075 } 2076 if (!nd->nd_repstat) 2077 nd->nd_repstat = nfsvno_accchk(vp, VEXEC, 2078 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 2079 NFSACCCHK_VPISLOCKED, NULL); 2080 if (nd->nd_repstat) { 2081 vput(vp); 2082 if (nd->nd_flag & ND_NFSV3) 2083 nfsrv_postopattr(nd, getret, &at); 2084 goto out; 2085 } 2086 is_ufs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "ufs") == 0; 2087 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2088 again: 2089 eofflag = 0; 2090 if (cookies) { 2091 free(cookies, M_TEMP); 2092 cookies = NULL; 2093 } 2094 2095 iv.iov_base = rbuf; 2096 iv.iov_len = siz; 2097 io.uio_iov = &iv; 2098 io.uio_iovcnt = 1; 2099 io.uio_offset = (off_t)off; 2100 io.uio_resid = siz; 2101 io.uio_segflg = UIO_SYSSPACE; 2102 io.uio_rw = UIO_READ; 2103 io.uio_td = NULL; 2104 nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies, 2105 &cookies); 2106 off = (u_int64_t)io.uio_offset; 2107 if (io.uio_resid) 2108 siz -= io.uio_resid; 2109 2110 if (!cookies && !nd->nd_repstat) 2111 nd->nd_repstat = NFSERR_PERM; 2112 if (nd->nd_flag & ND_NFSV3) { 2113 getret = nfsvno_getattr(vp, &at, nd, p, 1, NULL); 2114 if (!nd->nd_repstat) 2115 nd->nd_repstat = getret; 2116 } 2117 2118 /* 2119 * Handles the failed cases. nd->nd_repstat == 0 past here. 2120 */ 2121 if (nd->nd_repstat) { 2122 vput(vp); 2123 free(rbuf, M_TEMP); 2124 if (cookies) 2125 free(cookies, M_TEMP); 2126 if (nd->nd_flag & ND_NFSV3) 2127 nfsrv_postopattr(nd, getret, &at); 2128 goto out; 2129 } 2130 /* 2131 * If nothing read, return eof 2132 * rpc reply 2133 */ 2134 if (siz == 0) { 2135 vput(vp); 2136 if (nd->nd_flag & ND_NFSV2) { 2137 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2138 } else { 2139 nfsrv_postopattr(nd, getret, &at); 2140 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2141 txdr_hyper(at.na_filerev, tl); 2142 tl += 2; 2143 } 2144 *tl++ = newnfs_false; 2145 *tl = newnfs_true; 2146 free(rbuf, M_TEMP); 2147 free(cookies, M_TEMP); 2148 goto out; 2149 } 2150 2151 /* 2152 * Check for degenerate cases of nothing useful read. 2153 * If so go try again 2154 */ 2155 cpos = rbuf; 2156 cend = rbuf + siz; 2157 dp = (struct dirent *)cpos; 2158 cookiep = cookies; 2159 2160 /* 2161 * For some reason FreeBSD's ufs_readdir() chooses to back the 2162 * directory offset up to a block boundary, so it is necessary to 2163 * skip over the records that precede the requested offset. This 2164 * requires the assumption that file offset cookies monotonically 2165 * increase. 2166 */ 2167 while (cpos < cend && ncookies > 0 && 2168 (dp->d_fileno == 0 || dp->d_type == DT_WHT || 2169 (is_ufs == 1 && ((u_quad_t)(*cookiep)) <= toff))) { 2170 cpos += dp->d_reclen; 2171 dp = (struct dirent *)cpos; 2172 cookiep++; 2173 ncookies--; 2174 } 2175 if (cpos >= cend || ncookies == 0) { 2176 siz = fullsiz; 2177 toff = off; 2178 goto again; 2179 } 2180 vput(vp); 2181 2182 /* 2183 * If cnt > MCLBYTES and the reply will not be saved, use 2184 * ext_pgs mbufs for TLS. 2185 * For NFSv4.0, we do not know for sure if the reply will 2186 * be saved, so do not use ext_pgs mbufs for NFSv4.0. 2187 */ 2188 if (cnt > MCLBYTES && siz > MCLBYTES && 2189 (nd->nd_flag & (ND_TLS | ND_EXTPG | ND_SAVEREPLY)) == ND_TLS && 2190 (nd->nd_flag & (ND_NFSV4 | ND_NFSV41)) != ND_NFSV4) 2191 nd->nd_flag |= ND_EXTPG; 2192 2193 /* 2194 * dirlen is the size of the reply, including all XDR and must 2195 * not exceed cnt. For NFSv2, RFC1094 didn't clearly indicate 2196 * if the XDR should be included in "count", but to be safe, we do. 2197 * (Include the two booleans at the end of the reply in dirlen now.) 2198 */ 2199 if (nd->nd_flag & ND_NFSV3) { 2200 nfsrv_postopattr(nd, getret, &at); 2201 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2202 txdr_hyper(at.na_filerev, tl); 2203 dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED; 2204 } else { 2205 dirlen = 2 * NFSX_UNSIGNED; 2206 } 2207 2208 /* Loop through the records and build reply */ 2209 while (cpos < cend && ncookies > 0) { 2210 nlen = dp->d_namlen; 2211 if (dp->d_fileno != 0 && dp->d_type != DT_WHT && 2212 nlen <= NFS_MAXNAMLEN) { 2213 if (nd->nd_flag & ND_NFSV3) 2214 dirlen += (6*NFSX_UNSIGNED + NFSM_RNDUP(nlen)); 2215 else 2216 dirlen += (4*NFSX_UNSIGNED + NFSM_RNDUP(nlen)); 2217 if (dirlen > cnt) { 2218 eofflag = 0; 2219 break; 2220 } 2221 2222 /* 2223 * Build the directory record xdr from 2224 * the dirent entry. 2225 */ 2226 if (nd->nd_flag & ND_NFSV3) { 2227 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2228 *tl++ = newnfs_true; 2229 *tl++ = 0; 2230 } else { 2231 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2232 *tl++ = newnfs_true; 2233 } 2234 *tl = txdr_unsigned(dp->d_fileno); 2235 (void) nfsm_strtom(nd, dp->d_name, nlen); 2236 if (nd->nd_flag & ND_NFSV3) { 2237 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2238 txdr_hyper(*cookiep, tl); 2239 } else { 2240 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 2241 *tl = txdr_unsigned(*cookiep); 2242 } 2243 } 2244 cpos += dp->d_reclen; 2245 dp = (struct dirent *)cpos; 2246 cookiep++; 2247 ncookies--; 2248 } 2249 if (cpos < cend) 2250 eofflag = 0; 2251 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2252 *tl++ = newnfs_false; 2253 if (eofflag) 2254 *tl = newnfs_true; 2255 else 2256 *tl = newnfs_false; 2257 free(rbuf, M_TEMP); 2258 free(cookies, M_TEMP); 2259 2260 out: 2261 NFSEXITCODE2(0, nd); 2262 return (0); 2263 nfsmout: 2264 vput(vp); 2265 NFSEXITCODE2(error, nd); 2266 return (error); 2267 } 2268 2269 /* 2270 * Readdirplus for V3 and Readdir for V4. 2271 */ 2272 int 2273 nfsrvd_readdirplus(struct nfsrv_descript *nd, int isdgram, 2274 struct vnode *vp, struct nfsexstuff *exp) 2275 { 2276 struct dirent *dp; 2277 u_int32_t *tl; 2278 int dirlen; 2279 char *cpos, *cend, *rbuf; 2280 struct vnode *nvp; 2281 fhandle_t nfh; 2282 struct nfsvattr nva, at, *nvap = &nva; 2283 struct mbuf *mb0, *mb1; 2284 struct nfsreferral *refp; 2285 int nlen, r, error = 0, getret = 1, usevget = 1; 2286 int siz, cnt, fullsiz, eofflag, ncookies, entrycnt; 2287 caddr_t bpos0, bpos1; 2288 u_int64_t off, toff, verf __unused; 2289 uint64_t *cookies = NULL, *cookiep; 2290 nfsattrbit_t attrbits, rderrbits, savbits; 2291 struct uio io; 2292 struct iovec iv; 2293 struct componentname cn; 2294 int at_root, is_ufs, is_zfs, needs_unbusy, supports_nfsv4acls; 2295 struct mount *mp, *new_mp; 2296 uint64_t mounted_on_fileno; 2297 struct thread *p = curthread; 2298 int bextpg0, bextpg1, bextpgsiz0, bextpgsiz1; 2299 2300 if (nd->nd_repstat) { 2301 nfsrv_postopattr(nd, getret, &at); 2302 goto out; 2303 } 2304 NFSM_DISSECT(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2305 off = fxdr_hyper(tl); 2306 toff = off; 2307 tl += 2; 2308 verf = fxdr_hyper(tl); 2309 tl += 2; 2310 siz = fxdr_unsigned(int, *tl++); 2311 cnt = fxdr_unsigned(int, *tl); 2312 2313 /* 2314 * Use the server's maximum data transfer size as the upper bound 2315 * on reply datalen. 2316 */ 2317 if (cnt > NFS_SRVMAXDATA(nd) || cnt < 0) 2318 cnt = NFS_SRVMAXDATA(nd); 2319 2320 /* 2321 * siz is a "hint" of how much directory information (name, fileid, 2322 * cookie) should be in the reply. At least one client "hints" 0, 2323 * so I set it to cnt for that case. I also round it up to the 2324 * next multiple of DIRBLKSIZ. 2325 * Since the size of a Readdirplus directory entry reply will always 2326 * be greater than a directory entry returned by VOP_READDIR(), it 2327 * does not make sense to read more than NFS_SRVMAXDATA() via 2328 * VOP_READDIR(). 2329 */ 2330 if (siz <= 0) 2331 siz = cnt; 2332 else if (siz > NFS_SRVMAXDATA(nd)) 2333 siz = NFS_SRVMAXDATA(nd); 2334 siz = ((siz + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 2335 2336 if (nd->nd_flag & ND_NFSV4) { 2337 error = nfsrv_getattrbits(nd, &attrbits, NULL, NULL); 2338 if (error) 2339 goto nfsmout; 2340 NFSSET_ATTRBIT(&savbits, &attrbits); 2341 NFSCLRNOTFILLABLE_ATTRBIT(&attrbits, nd); 2342 NFSZERO_ATTRBIT(&rderrbits); 2343 NFSSETBIT_ATTRBIT(&rderrbits, NFSATTRBIT_RDATTRERROR); 2344 } else { 2345 NFSZERO_ATTRBIT(&attrbits); 2346 } 2347 fullsiz = siz; 2348 nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd, p, 1, NULL); 2349 #if 0 2350 if (!nd->nd_repstat) { 2351 if (off && verf != at.na_filerev) { 2352 /* 2353 * va_filerev is not sufficient as a cookie verifier, 2354 * since it is not supposed to change when entries are 2355 * removed/added unless that offset cookies returned to 2356 * the client are no longer valid. 2357 */ 2358 if (nd->nd_flag & ND_NFSV4) { 2359 nd->nd_repstat = NFSERR_NOTSAME; 2360 } else { 2361 nd->nd_repstat = NFSERR_BAD_COOKIE; 2362 } 2363 } 2364 } 2365 #endif 2366 if (!nd->nd_repstat && vp->v_type != VDIR) 2367 nd->nd_repstat = NFSERR_NOTDIR; 2368 if (!nd->nd_repstat && cnt == 0) 2369 nd->nd_repstat = NFSERR_TOOSMALL; 2370 if (!nd->nd_repstat) 2371 nd->nd_repstat = nfsvno_accchk(vp, VEXEC, 2372 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 2373 NFSACCCHK_VPISLOCKED, NULL); 2374 if (nd->nd_repstat) { 2375 vput(vp); 2376 if (nd->nd_flag & ND_NFSV3) 2377 nfsrv_postopattr(nd, getret, &at); 2378 goto out; 2379 } 2380 is_ufs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "ufs") == 0; 2381 is_zfs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "zfs") == 0; 2382 2383 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2384 again: 2385 eofflag = 0; 2386 if (cookies) { 2387 free(cookies, M_TEMP); 2388 cookies = NULL; 2389 } 2390 2391 iv.iov_base = rbuf; 2392 iv.iov_len = siz; 2393 io.uio_iov = &iv; 2394 io.uio_iovcnt = 1; 2395 io.uio_offset = (off_t)off; 2396 io.uio_resid = siz; 2397 io.uio_segflg = UIO_SYSSPACE; 2398 io.uio_rw = UIO_READ; 2399 io.uio_td = NULL; 2400 nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies, 2401 &cookies); 2402 off = (u_int64_t)io.uio_offset; 2403 if (io.uio_resid) 2404 siz -= io.uio_resid; 2405 2406 getret = nfsvno_getattr(vp, &at, nd, p, 1, NULL); 2407 2408 if (!cookies && !nd->nd_repstat) 2409 nd->nd_repstat = NFSERR_PERM; 2410 if (!nd->nd_repstat) 2411 nd->nd_repstat = getret; 2412 if (nd->nd_repstat) { 2413 vput(vp); 2414 if (cookies) 2415 free(cookies, M_TEMP); 2416 free(rbuf, M_TEMP); 2417 if (nd->nd_flag & ND_NFSV3) 2418 nfsrv_postopattr(nd, getret, &at); 2419 goto out; 2420 } 2421 /* 2422 * If nothing read, return eof 2423 * rpc reply 2424 */ 2425 if (siz == 0) { 2426 vput(vp); 2427 if (nd->nd_flag & ND_NFSV3) 2428 nfsrv_postopattr(nd, getret, &at); 2429 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2430 txdr_hyper(at.na_filerev, tl); 2431 tl += 2; 2432 *tl++ = newnfs_false; 2433 *tl = newnfs_true; 2434 free(cookies, M_TEMP); 2435 free(rbuf, M_TEMP); 2436 goto out; 2437 } 2438 2439 /* 2440 * Check for degenerate cases of nothing useful read. 2441 * If so go try again 2442 */ 2443 cpos = rbuf; 2444 cend = rbuf + siz; 2445 dp = (struct dirent *)cpos; 2446 cookiep = cookies; 2447 2448 /* 2449 * For some reason FreeBSD's ufs_readdir() chooses to back the 2450 * directory offset up to a block boundary, so it is necessary to 2451 * skip over the records that precede the requested offset. This 2452 * requires the assumption that file offset cookies monotonically 2453 * increase. 2454 */ 2455 while (cpos < cend && ncookies > 0 && 2456 (dp->d_fileno == 0 || dp->d_type == DT_WHT || 2457 (is_ufs == 1 && ((u_quad_t)(*cookiep)) <= toff) || 2458 ((nd->nd_flag & ND_NFSV4) && 2459 ((dp->d_namlen == 1 && dp->d_name[0] == '.') || 2460 (dp->d_namlen==2 && dp->d_name[0]=='.' && dp->d_name[1]=='.'))))) { 2461 cpos += dp->d_reclen; 2462 dp = (struct dirent *)cpos; 2463 cookiep++; 2464 ncookies--; 2465 } 2466 if (cpos >= cend || ncookies == 0) { 2467 siz = fullsiz; 2468 toff = off; 2469 goto again; 2470 } 2471 2472 /* 2473 * Busy the file system so that the mount point won't go away 2474 * and, as such, VFS_VGET() can be used safely. 2475 */ 2476 mp = vp->v_mount; 2477 vfs_ref(mp); 2478 NFSVOPUNLOCK(vp); 2479 nd->nd_repstat = vfs_busy(mp, 0); 2480 vfs_rel(mp); 2481 if (nd->nd_repstat != 0) { 2482 vrele(vp); 2483 free(cookies, M_TEMP); 2484 free(rbuf, M_TEMP); 2485 if (nd->nd_flag & ND_NFSV3) 2486 nfsrv_postopattr(nd, getret, &at); 2487 goto out; 2488 } 2489 2490 /* 2491 * Check to see if entries in this directory can be safely acquired 2492 * via VFS_VGET() or if a switch to VOP_LOOKUP() is required. 2493 * ZFS snapshot directories need VOP_LOOKUP(), so that any 2494 * automount of the snapshot directory that is required will 2495 * be done. 2496 * This needs to be done here for NFSv4, since NFSv4 never does 2497 * a VFS_VGET() for "." or "..". 2498 */ 2499 if (is_zfs == 1) { 2500 r = VFS_VGET(mp, at.na_fileid, LK_SHARED, &nvp); 2501 if (r == EOPNOTSUPP) { 2502 usevget = 0; 2503 cn.cn_nameiop = LOOKUP; 2504 cn.cn_lkflags = LK_SHARED | LK_RETRY; 2505 cn.cn_cred = nd->nd_cred; 2506 } else if (r == 0) 2507 vput(nvp); 2508 } 2509 2510 /* 2511 * If the reply is likely to exceed MCLBYTES and the reply will 2512 * not be saved, use ext_pgs mbufs for TLS. 2513 * It is difficult to predict how large each entry will be and 2514 * how many entries have been read, so just assume the directory 2515 * entries grow by a factor of 4 when attributes are included. 2516 * For NFSv4.0, we do not know for sure if the reply will 2517 * be saved, so do not use ext_pgs mbufs for NFSv4.0. 2518 */ 2519 if (cnt > MCLBYTES && siz > MCLBYTES / 4 && 2520 (nd->nd_flag & (ND_TLS | ND_EXTPG | ND_SAVEREPLY)) == ND_TLS && 2521 (nd->nd_flag & (ND_NFSV4 | ND_NFSV41)) != ND_NFSV4) 2522 nd->nd_flag |= ND_EXTPG; 2523 2524 /* 2525 * Save this position, in case there is an error before one entry 2526 * is created. 2527 */ 2528 mb0 = nd->nd_mb; 2529 bpos0 = nd->nd_bpos; 2530 bextpg0 = nd->nd_bextpg; 2531 bextpgsiz0 = nd->nd_bextpgsiz; 2532 2533 /* 2534 * Fill in the first part of the reply. 2535 * dirlen is the reply length in bytes and cannot exceed cnt. 2536 * (Include the two booleans at the end of the reply in dirlen now, 2537 * so we recognize when we have exceeded cnt.) 2538 */ 2539 if (nd->nd_flag & ND_NFSV3) { 2540 dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED; 2541 nfsrv_postopattr(nd, getret, &at); 2542 } else { 2543 dirlen = NFSX_VERF + 2 * NFSX_UNSIGNED; 2544 } 2545 NFSM_BUILD(tl, u_int32_t *, NFSX_VERF); 2546 txdr_hyper(at.na_filerev, tl); 2547 2548 /* 2549 * Save this position, in case there is an empty reply needed. 2550 */ 2551 mb1 = nd->nd_mb; 2552 bpos1 = nd->nd_bpos; 2553 bextpg1 = nd->nd_bextpg; 2554 bextpgsiz1 = nd->nd_bextpgsiz; 2555 2556 /* Loop through the records and build reply */ 2557 entrycnt = 0; 2558 while (cpos < cend && ncookies > 0 && dirlen < cnt) { 2559 nlen = dp->d_namlen; 2560 if (dp->d_fileno != 0 && dp->d_type != DT_WHT && 2561 nlen <= NFS_MAXNAMLEN && 2562 ((nd->nd_flag & ND_NFSV3) || nlen > 2 || 2563 (nlen==2 && (dp->d_name[0]!='.' || dp->d_name[1]!='.')) 2564 || (nlen == 1 && dp->d_name[0] != '.'))) { 2565 /* 2566 * Save the current position in the reply, in case 2567 * this entry exceeds cnt. 2568 */ 2569 mb1 = nd->nd_mb; 2570 bpos1 = nd->nd_bpos; 2571 bextpg1 = nd->nd_bextpg; 2572 bextpgsiz1 = nd->nd_bextpgsiz; 2573 2574 /* 2575 * For readdir_and_lookup get the vnode using 2576 * the file number. 2577 */ 2578 nvp = NULL; 2579 refp = NULL; 2580 r = 0; 2581 at_root = 0; 2582 needs_unbusy = 0; 2583 new_mp = mp; 2584 mounted_on_fileno = (uint64_t)dp->d_fileno; 2585 if ((nd->nd_flag & ND_NFSV3) || 2586 NFSNONZERO_ATTRBIT(&savbits)) { 2587 if (nd->nd_flag & ND_NFSV4) 2588 refp = nfsv4root_getreferral(NULL, 2589 vp, dp->d_fileno); 2590 if (refp == NULL) { 2591 if (usevget) 2592 r = VFS_VGET(mp, dp->d_fileno, 2593 LK_SHARED, &nvp); 2594 else 2595 r = EOPNOTSUPP; 2596 if (r == EOPNOTSUPP) { 2597 if (usevget) { 2598 usevget = 0; 2599 cn.cn_nameiop = LOOKUP; 2600 cn.cn_lkflags = 2601 LK_SHARED | 2602 LK_RETRY; 2603 cn.cn_cred = 2604 nd->nd_cred; 2605 } 2606 cn.cn_nameptr = dp->d_name; 2607 cn.cn_namelen = nlen; 2608 cn.cn_flags = ISLASTCN | 2609 NOFOLLOW | LOCKLEAF; 2610 if (nlen == 2 && 2611 dp->d_name[0] == '.' && 2612 dp->d_name[1] == '.') 2613 cn.cn_flags |= 2614 ISDOTDOT; 2615 if (NFSVOPLOCK(vp, LK_SHARED) 2616 != 0) { 2617 nd->nd_repstat = EPERM; 2618 break; 2619 } 2620 if ((vp->v_vflag & VV_ROOT) != 0 2621 && (cn.cn_flags & ISDOTDOT) 2622 != 0) { 2623 vref(vp); 2624 nvp = vp; 2625 r = 0; 2626 } else { 2627 r = VOP_LOOKUP(vp, &nvp, 2628 &cn); 2629 if (vp != nvp) 2630 NFSVOPUNLOCK(vp); 2631 } 2632 } 2633 2634 /* 2635 * For NFSv4, check to see if nvp is 2636 * a mount point and get the mount 2637 * point vnode, as required. 2638 */ 2639 if (r == 0 && 2640 nfsrv_enable_crossmntpt != 0 && 2641 (nd->nd_flag & ND_NFSV4) != 0 && 2642 nvp->v_type == VDIR && 2643 nvp->v_mountedhere != NULL) { 2644 new_mp = nvp->v_mountedhere; 2645 r = vfs_busy(new_mp, 0); 2646 vput(nvp); 2647 nvp = NULL; 2648 if (r == 0) { 2649 r = VFS_ROOT(new_mp, 2650 LK_SHARED, &nvp); 2651 needs_unbusy = 1; 2652 if (r == 0) 2653 at_root = 1; 2654 } 2655 } 2656 } 2657 2658 /* 2659 * If we failed to look up the entry, then it 2660 * has become invalid, most likely removed. 2661 */ 2662 if (r != 0) { 2663 if (needs_unbusy) 2664 vfs_unbusy(new_mp); 2665 goto invalid; 2666 } 2667 KASSERT(refp != NULL || nvp != NULL, 2668 ("%s: undetected lookup error", __func__)); 2669 2670 if (refp == NULL && 2671 ((nd->nd_flag & ND_NFSV3) || 2672 NFSNONZERO_ATTRBIT(&attrbits))) { 2673 r = nfsvno_getfh(nvp, &nfh, p); 2674 if (!r) 2675 r = nfsvno_getattr(nvp, nvap, nd, p, 2676 1, &attrbits); 2677 if (r == 0 && is_zfs == 1 && 2678 nfsrv_enable_crossmntpt != 0 && 2679 (nd->nd_flag & ND_NFSV4) != 0 && 2680 nvp->v_type == VDIR && 2681 vp->v_mount != nvp->v_mount) { 2682 /* 2683 * For a ZFS snapshot, there is a 2684 * pseudo mount that does not set 2685 * v_mountedhere, so it needs to 2686 * be detected via a different 2687 * mount structure. 2688 */ 2689 at_root = 1; 2690 if (new_mp == mp) 2691 new_mp = nvp->v_mount; 2692 } 2693 } 2694 2695 /* 2696 * If we failed to get attributes of the entry, 2697 * then just skip it for NFSv3 (the traditional 2698 * behavior in the old NFS server). 2699 * For NFSv4 the behavior is controlled by 2700 * RDATTRERROR: we either ignore the error or 2701 * fail the request. 2702 * The exception is EOPNOTSUPP, which can be 2703 * returned by nfsvno_getfh() for certain 2704 * file systems, such as devfs. This indicates 2705 * that the file system cannot be exported, 2706 * so just skip over the entry. 2707 * Note that RDATTRERROR is never set for NFSv3. 2708 */ 2709 if (r != 0) { 2710 if (!NFSISSET_ATTRBIT(&attrbits, 2711 NFSATTRBIT_RDATTRERROR) || 2712 r == EOPNOTSUPP) { 2713 vput(nvp); 2714 if (needs_unbusy != 0) 2715 vfs_unbusy(new_mp); 2716 if ((nd->nd_flag & ND_NFSV3) || 2717 r == EOPNOTSUPP) 2718 goto invalid; 2719 nd->nd_repstat = r; 2720 break; 2721 } 2722 } 2723 } 2724 2725 /* 2726 * Build the directory record xdr 2727 */ 2728 if (nd->nd_flag & ND_NFSV3) { 2729 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2730 *tl++ = newnfs_true; 2731 *tl++ = 0; 2732 *tl = txdr_unsigned(dp->d_fileno); 2733 dirlen += nfsm_strtom(nd, dp->d_name, nlen); 2734 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2735 txdr_hyper(*cookiep, tl); 2736 nfsrv_postopattr(nd, 0, nvap); 2737 dirlen += nfsm_fhtom(nd,(u_int8_t *)&nfh,0,1); 2738 dirlen += (5*NFSX_UNSIGNED+NFSX_V3POSTOPATTR); 2739 if (nvp != NULL) 2740 vput(nvp); 2741 } else { 2742 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2743 *tl++ = newnfs_true; 2744 txdr_hyper(*cookiep, tl); 2745 dirlen += nfsm_strtom(nd, dp->d_name, nlen); 2746 if (nvp != NULL) { 2747 supports_nfsv4acls = 2748 nfs_supportsnfsv4acls(nvp); 2749 NFSVOPUNLOCK(nvp); 2750 } else 2751 supports_nfsv4acls = 0; 2752 if (refp != NULL) { 2753 dirlen += nfsrv_putreferralattr(nd, 2754 &savbits, refp, 0, 2755 &nd->nd_repstat); 2756 if (nd->nd_repstat) { 2757 if (nvp != NULL) 2758 vrele(nvp); 2759 if (needs_unbusy != 0) 2760 vfs_unbusy(new_mp); 2761 break; 2762 } 2763 } else if (r) { 2764 dirlen += nfsvno_fillattr(nd, new_mp, 2765 nvp, nvap, &nfh, r, &rderrbits, 2766 nd->nd_cred, p, isdgram, 0, 2767 supports_nfsv4acls, at_root, 2768 mounted_on_fileno); 2769 } else { 2770 dirlen += nfsvno_fillattr(nd, new_mp, 2771 nvp, nvap, &nfh, r, &attrbits, 2772 nd->nd_cred, p, isdgram, 0, 2773 supports_nfsv4acls, at_root, 2774 mounted_on_fileno); 2775 } 2776 if (nvp != NULL) 2777 vrele(nvp); 2778 dirlen += (3 * NFSX_UNSIGNED); 2779 } 2780 if (needs_unbusy != 0) 2781 vfs_unbusy(new_mp); 2782 if (dirlen <= cnt) 2783 entrycnt++; 2784 } 2785 invalid: 2786 cpos += dp->d_reclen; 2787 dp = (struct dirent *)cpos; 2788 cookiep++; 2789 ncookies--; 2790 } 2791 vrele(vp); 2792 vfs_unbusy(mp); 2793 2794 /* 2795 * If dirlen > cnt, we must strip off the last entry. If that 2796 * results in an empty reply, report NFSERR_TOOSMALL. 2797 */ 2798 if (dirlen > cnt || nd->nd_repstat) { 2799 if (!nd->nd_repstat && entrycnt == 0) 2800 nd->nd_repstat = NFSERR_TOOSMALL; 2801 if (nd->nd_repstat) { 2802 nfsm_trimtrailing(nd, mb0, bpos0, bextpg0, bextpgsiz0); 2803 if (nd->nd_flag & ND_NFSV3) 2804 nfsrv_postopattr(nd, getret, &at); 2805 } else 2806 nfsm_trimtrailing(nd, mb1, bpos1, bextpg1, bextpgsiz1); 2807 eofflag = 0; 2808 } else if (cpos < cend) 2809 eofflag = 0; 2810 if (!nd->nd_repstat) { 2811 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2812 *tl++ = newnfs_false; 2813 if (eofflag) 2814 *tl = newnfs_true; 2815 else 2816 *tl = newnfs_false; 2817 } 2818 free(cookies, M_TEMP); 2819 free(rbuf, M_TEMP); 2820 2821 out: 2822 NFSEXITCODE2(0, nd); 2823 return (0); 2824 nfsmout: 2825 vput(vp); 2826 NFSEXITCODE2(error, nd); 2827 return (error); 2828 } 2829 2830 /* 2831 * Get the settable attributes out of the mbuf list. 2832 * (Return 0 or EBADRPC) 2833 */ 2834 int 2835 nfsrv_sattr(struct nfsrv_descript *nd, vnode_t vp, struct nfsvattr *nvap, 2836 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p) 2837 { 2838 u_int32_t *tl; 2839 struct nfsv2_sattr *sp; 2840 int error = 0, toclient = 0; 2841 2842 switch (nd->nd_flag & (ND_NFSV2 | ND_NFSV3 | ND_NFSV4)) { 2843 case ND_NFSV2: 2844 NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2845 /* 2846 * Some old clients didn't fill in the high order 16bits. 2847 * --> check the low order 2 bytes for 0xffff 2848 */ 2849 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 2850 nvap->na_mode = nfstov_mode(sp->sa_mode); 2851 if (sp->sa_uid != newnfs_xdrneg1) 2852 nvap->na_uid = fxdr_unsigned(uid_t, sp->sa_uid); 2853 if (sp->sa_gid != newnfs_xdrneg1) 2854 nvap->na_gid = fxdr_unsigned(gid_t, sp->sa_gid); 2855 if (sp->sa_size != newnfs_xdrneg1) 2856 nvap->na_size = fxdr_unsigned(u_quad_t, sp->sa_size); 2857 if (sp->sa_atime.nfsv2_sec != newnfs_xdrneg1) { 2858 #ifdef notyet 2859 fxdr_nfsv2time(&sp->sa_atime, &nvap->na_atime); 2860 #else 2861 nvap->na_atime.tv_sec = 2862 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 2863 nvap->na_atime.tv_nsec = 0; 2864 #endif 2865 } 2866 if (sp->sa_mtime.nfsv2_sec != newnfs_xdrneg1) 2867 fxdr_nfsv2time(&sp->sa_mtime, &nvap->na_mtime); 2868 break; 2869 case ND_NFSV3: 2870 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2871 if (*tl == newnfs_true) { 2872 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2873 nvap->na_mode = nfstov_mode(*tl); 2874 } 2875 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2876 if (*tl == newnfs_true) { 2877 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2878 nvap->na_uid = fxdr_unsigned(uid_t, *tl); 2879 } 2880 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2881 if (*tl == newnfs_true) { 2882 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2883 nvap->na_gid = fxdr_unsigned(gid_t, *tl); 2884 } 2885 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2886 if (*tl == newnfs_true) { 2887 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2888 nvap->na_size = fxdr_hyper(tl); 2889 } 2890 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2891 switch (fxdr_unsigned(int, *tl)) { 2892 case NFSV3SATTRTIME_TOCLIENT: 2893 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2894 fxdr_nfsv3time(tl, &nvap->na_atime); 2895 toclient = 1; 2896 break; 2897 case NFSV3SATTRTIME_TOSERVER: 2898 vfs_timestamp(&nvap->na_atime); 2899 nvap->na_vaflags |= VA_UTIMES_NULL; 2900 break; 2901 } 2902 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2903 switch (fxdr_unsigned(int, *tl)) { 2904 case NFSV3SATTRTIME_TOCLIENT: 2905 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2906 fxdr_nfsv3time(tl, &nvap->na_mtime); 2907 nvap->na_vaflags &= ~VA_UTIMES_NULL; 2908 break; 2909 case NFSV3SATTRTIME_TOSERVER: 2910 vfs_timestamp(&nvap->na_mtime); 2911 if (!toclient) 2912 nvap->na_vaflags |= VA_UTIMES_NULL; 2913 break; 2914 } 2915 break; 2916 case ND_NFSV4: 2917 error = nfsv4_sattr(nd, vp, nvap, attrbitp, aclp, p); 2918 } 2919 nfsmout: 2920 NFSEXITCODE2(error, nd); 2921 return (error); 2922 } 2923 2924 /* 2925 * Handle the setable attributes for V4. 2926 * Returns NFSERR_BADXDR if it can't be parsed, 0 otherwise. 2927 */ 2928 int 2929 nfsv4_sattr(struct nfsrv_descript *nd, vnode_t vp, struct nfsvattr *nvap, 2930 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p) 2931 { 2932 u_int32_t *tl; 2933 int attrsum = 0; 2934 int i, j; 2935 int error, attrsize, bitpos, aclsize, aceerr, retnotsup = 0; 2936 int moderet, toclient = 0; 2937 u_char *cp, namestr[NFSV4_SMALLSTR + 1]; 2938 uid_t uid; 2939 gid_t gid; 2940 u_short mode, mask; /* Same type as va_mode. */ 2941 struct vattr va; 2942 2943 error = nfsrv_getattrbits(nd, attrbitp, NULL, &retnotsup); 2944 if (error) 2945 goto nfsmout; 2946 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2947 attrsize = fxdr_unsigned(int, *tl); 2948 2949 /* 2950 * Loop around getting the setable attributes. If an unsupported 2951 * one is found, set nd_repstat == NFSERR_ATTRNOTSUPP and return. 2952 */ 2953 if (retnotsup) { 2954 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2955 bitpos = NFSATTRBIT_MAX; 2956 } else { 2957 bitpos = 0; 2958 } 2959 moderet = 0; 2960 for (; bitpos < NFSATTRBIT_MAX; bitpos++) { 2961 if (attrsum > attrsize) { 2962 error = NFSERR_BADXDR; 2963 goto nfsmout; 2964 } 2965 if (NFSISSET_ATTRBIT(attrbitp, bitpos)) 2966 switch (bitpos) { 2967 case NFSATTRBIT_SIZE: 2968 NFSM_DISSECT(tl, u_int32_t *, NFSX_HYPER); 2969 if (vp != NULL && vp->v_type != VREG) { 2970 error = (vp->v_type == VDIR) ? NFSERR_ISDIR : 2971 NFSERR_INVAL; 2972 goto nfsmout; 2973 } 2974 nvap->na_size = fxdr_hyper(tl); 2975 attrsum += NFSX_HYPER; 2976 break; 2977 case NFSATTRBIT_ACL: 2978 error = nfsrv_dissectacl(nd, aclp, true, &aceerr, 2979 &aclsize, p); 2980 if (error) 2981 goto nfsmout; 2982 if (aceerr && !nd->nd_repstat) 2983 nd->nd_repstat = aceerr; 2984 attrsum += aclsize; 2985 break; 2986 case NFSATTRBIT_ARCHIVE: 2987 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2988 if (!nd->nd_repstat) 2989 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2990 attrsum += NFSX_UNSIGNED; 2991 break; 2992 case NFSATTRBIT_HIDDEN: 2993 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2994 if (!nd->nd_repstat) 2995 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2996 attrsum += NFSX_UNSIGNED; 2997 break; 2998 case NFSATTRBIT_MIMETYPE: 2999 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3000 i = fxdr_unsigned(int, *tl); 3001 error = nfsm_advance(nd, NFSM_RNDUP(i), -1); 3002 if (error) 3003 goto nfsmout; 3004 if (!nd->nd_repstat) 3005 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 3006 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(i)); 3007 break; 3008 case NFSATTRBIT_MODE: 3009 moderet = NFSERR_INVAL; /* Can't do MODESETMASKED. */ 3010 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3011 nvap->na_mode = nfstov_mode(*tl); 3012 attrsum += NFSX_UNSIGNED; 3013 break; 3014 case NFSATTRBIT_OWNER: 3015 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3016 j = fxdr_unsigned(int, *tl); 3017 if (j < 0) { 3018 error = NFSERR_BADXDR; 3019 goto nfsmout; 3020 } 3021 if (j > NFSV4_SMALLSTR) 3022 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK); 3023 else 3024 cp = namestr; 3025 error = nfsrv_mtostr(nd, cp, j); 3026 if (error) { 3027 if (j > NFSV4_SMALLSTR) 3028 free(cp, M_NFSSTRING); 3029 goto nfsmout; 3030 } 3031 if (!nd->nd_repstat) { 3032 nd->nd_repstat = nfsv4_strtouid(nd, cp, j, 3033 &uid); 3034 if (!nd->nd_repstat) 3035 nvap->na_uid = uid; 3036 } 3037 if (j > NFSV4_SMALLSTR) 3038 free(cp, M_NFSSTRING); 3039 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j)); 3040 break; 3041 case NFSATTRBIT_OWNERGROUP: 3042 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3043 j = fxdr_unsigned(int, *tl); 3044 if (j < 0) { 3045 error = NFSERR_BADXDR; 3046 goto nfsmout; 3047 } 3048 if (j > NFSV4_SMALLSTR) 3049 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK); 3050 else 3051 cp = namestr; 3052 error = nfsrv_mtostr(nd, cp, j); 3053 if (error) { 3054 if (j > NFSV4_SMALLSTR) 3055 free(cp, M_NFSSTRING); 3056 goto nfsmout; 3057 } 3058 if (!nd->nd_repstat) { 3059 nd->nd_repstat = nfsv4_strtogid(nd, cp, j, 3060 &gid); 3061 if (!nd->nd_repstat) 3062 nvap->na_gid = gid; 3063 } 3064 if (j > NFSV4_SMALLSTR) 3065 free(cp, M_NFSSTRING); 3066 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j)); 3067 break; 3068 case NFSATTRBIT_SYSTEM: 3069 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3070 if (!nd->nd_repstat) 3071 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 3072 attrsum += NFSX_UNSIGNED; 3073 break; 3074 case NFSATTRBIT_TIMEACCESSSET: 3075 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3076 attrsum += NFSX_UNSIGNED; 3077 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) { 3078 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 3079 fxdr_nfsv4time(tl, &nvap->na_atime); 3080 toclient = 1; 3081 attrsum += NFSX_V4TIME; 3082 } else { 3083 vfs_timestamp(&nvap->na_atime); 3084 nvap->na_vaflags |= VA_UTIMES_NULL; 3085 } 3086 break; 3087 case NFSATTRBIT_TIMEBACKUP: 3088 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 3089 if (!nd->nd_repstat) 3090 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 3091 attrsum += NFSX_V4TIME; 3092 break; 3093 case NFSATTRBIT_TIMECREATE: 3094 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 3095 fxdr_nfsv4time(tl, &nvap->na_btime); 3096 attrsum += NFSX_V4TIME; 3097 break; 3098 case NFSATTRBIT_TIMEMODIFYSET: 3099 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3100 attrsum += NFSX_UNSIGNED; 3101 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) { 3102 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 3103 fxdr_nfsv4time(tl, &nvap->na_mtime); 3104 nvap->na_vaflags &= ~VA_UTIMES_NULL; 3105 attrsum += NFSX_V4TIME; 3106 } else { 3107 vfs_timestamp(&nvap->na_mtime); 3108 if (!toclient) 3109 nvap->na_vaflags |= VA_UTIMES_NULL; 3110 } 3111 break; 3112 case NFSATTRBIT_MODESETMASKED: 3113 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 3114 mode = fxdr_unsigned(u_short, *tl++); 3115 mask = fxdr_unsigned(u_short, *tl); 3116 /* 3117 * vp == NULL implies an Open/Create operation. 3118 * This attribute can only be used for Setattr and 3119 * only for NFSv4.1 or higher. 3120 * If moderet != 0, a mode attribute has also been 3121 * specified and this attribute cannot be done in the 3122 * same Setattr operation. 3123 */ 3124 if ((nd->nd_flag & ND_NFSV41) == 0) 3125 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 3126 else if ((mode & ~07777) != 0 || (mask & ~07777) != 0 || 3127 vp == NULL) 3128 nd->nd_repstat = NFSERR_INVAL; 3129 else if (moderet == 0) 3130 moderet = VOP_GETATTR(vp, &va, nd->nd_cred); 3131 if (moderet == 0) 3132 nvap->na_mode = (mode & mask) | 3133 (va.va_mode & ~mask); 3134 else 3135 nd->nd_repstat = moderet; 3136 attrsum += 2 * NFSX_UNSIGNED; 3137 break; 3138 default: 3139 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 3140 /* 3141 * set bitpos so we drop out of the loop. 3142 */ 3143 bitpos = NFSATTRBIT_MAX; 3144 break; 3145 } 3146 } 3147 3148 /* 3149 * some clients pad the attrlist, so we need to skip over the 3150 * padding. 3151 */ 3152 if (attrsum > attrsize) { 3153 error = NFSERR_BADXDR; 3154 } else { 3155 attrsize = NFSM_RNDUP(attrsize); 3156 if (attrsum < attrsize) 3157 error = nfsm_advance(nd, attrsize - attrsum, -1); 3158 } 3159 nfsmout: 3160 NFSEXITCODE2(error, nd); 3161 return (error); 3162 } 3163 3164 /* 3165 * Check/setup export credentials. 3166 */ 3167 int 3168 nfsd_excred(struct nfsrv_descript *nd, struct nfsexstuff *exp, 3169 struct ucred *credanon, bool testsec) 3170 { 3171 int error; 3172 3173 /* 3174 * Check/setup credentials. 3175 */ 3176 if (nd->nd_flag & ND_GSS) 3177 exp->nes_exflag &= ~MNT_EXPORTANON; 3178 3179 /* 3180 * Check to see if the operation is allowed for this security flavor. 3181 */ 3182 error = 0; 3183 if (testsec) { 3184 error = nfsvno_testexp(nd, exp); 3185 if (error != 0) 3186 goto out; 3187 } 3188 3189 /* 3190 * Check to see if the file system is exported V4 only. 3191 */ 3192 if (NFSVNO_EXV4ONLY(exp) && !(nd->nd_flag & ND_NFSV4)) { 3193 error = NFSERR_PROGNOTV4; 3194 goto out; 3195 } 3196 3197 /* 3198 * Now, map the user credentials. 3199 * (Note that ND_AUTHNONE will only be set for an NFSv3 3200 * Fsinfo RPC. If set for anything else, this code might need 3201 * to change.) 3202 */ 3203 if (NFSVNO_EXPORTED(exp)) { 3204 if (((nd->nd_flag & ND_GSS) == 0 && nd->nd_cred->cr_uid == 0) || 3205 NFSVNO_EXPORTANON(exp) || 3206 (nd->nd_flag & ND_AUTHNONE) != 0) { 3207 nd->nd_cred->cr_uid = credanon->cr_uid; 3208 nd->nd_cred->cr_gid = credanon->cr_gid; 3209 crsetgroups(nd->nd_cred, credanon->cr_ngroups, 3210 credanon->cr_groups); 3211 } else if ((nd->nd_flag & ND_GSS) == 0) { 3212 /* 3213 * If using AUTH_SYS, call nfsrv_getgrpscred() to see 3214 * if there is a replacement credential with a group 3215 * list set up by "nfsuserd -manage-gids". 3216 * If there is no replacement, nfsrv_getgrpscred() 3217 * simply returns its argument. 3218 */ 3219 nd->nd_cred = nfsrv_getgrpscred(nd->nd_cred); 3220 } 3221 } 3222 3223 out: 3224 NFSEXITCODE2(error, nd); 3225 return (error); 3226 } 3227 3228 /* 3229 * Check exports. 3230 */ 3231 int 3232 nfsvno_checkexp(struct mount *mp, struct sockaddr *nam, struct nfsexstuff *exp, 3233 struct ucred **credp) 3234 { 3235 int error; 3236 3237 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp, 3238 &exp->nes_numsecflavor, exp->nes_secflavors); 3239 if (error) { 3240 if (nfs_rootfhset) { 3241 exp->nes_exflag = 0; 3242 exp->nes_numsecflavor = 0; 3243 error = 0; 3244 } 3245 } else if (exp->nes_numsecflavor < 1 || exp->nes_numsecflavor > 3246 MAXSECFLAVORS) { 3247 printf("nfsvno_checkexp: numsecflavors out of range\n"); 3248 exp->nes_numsecflavor = 0; 3249 error = EACCES; 3250 } 3251 NFSEXITCODE(error); 3252 return (error); 3253 } 3254 3255 /* 3256 * Get a vnode for a file handle and export stuff. 3257 */ 3258 int 3259 nfsvno_fhtovp(struct mount *mp, fhandle_t *fhp, struct sockaddr *nam, 3260 int lktype, struct vnode **vpp, struct nfsexstuff *exp, 3261 struct ucred **credp) 3262 { 3263 int error; 3264 3265 *credp = NULL; 3266 exp->nes_numsecflavor = 0; 3267 error = VFS_FHTOVP(mp, &fhp->fh_fid, lktype, vpp); 3268 if (error != 0) 3269 /* Make sure the server replies ESTALE to the client. */ 3270 error = ESTALE; 3271 if (nam && !error) { 3272 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp, 3273 &exp->nes_numsecflavor, exp->nes_secflavors); 3274 if (error) { 3275 if (nfs_rootfhset) { 3276 exp->nes_exflag = 0; 3277 exp->nes_numsecflavor = 0; 3278 error = 0; 3279 } else { 3280 vput(*vpp); 3281 } 3282 } else if (exp->nes_numsecflavor < 1 || exp->nes_numsecflavor > 3283 MAXSECFLAVORS) { 3284 printf("nfsvno_fhtovp: numsecflavors out of range\n"); 3285 exp->nes_numsecflavor = 0; 3286 error = EACCES; 3287 vput(*vpp); 3288 } 3289 } 3290 NFSEXITCODE(error); 3291 return (error); 3292 } 3293 3294 /* 3295 * nfsd_fhtovp() - convert a fh to a vnode ptr 3296 * - look up fsid in mount list (if not found ret error) 3297 * - get vp and export rights by calling nfsvno_fhtovp() 3298 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 3299 * for AUTH_SYS 3300 * - if mpp != NULL, return the mount point so that it can 3301 * be used for vn_finished_write() by the caller 3302 */ 3303 void 3304 nfsd_fhtovp(struct nfsrv_descript *nd, struct nfsrvfh *nfp, int lktype, 3305 struct vnode **vpp, struct nfsexstuff *exp, 3306 struct mount **mpp, int startwrite, int nextop) 3307 { 3308 struct mount *mp, *mpw; 3309 struct ucred *credanon; 3310 fhandle_t *fhp; 3311 int error; 3312 3313 if (mpp != NULL) 3314 *mpp = NULL; 3315 *vpp = NULL; 3316 fhp = (fhandle_t *)nfp->nfsrvfh_data; 3317 mp = vfs_busyfs(&fhp->fh_fsid); 3318 if (mp == NULL) { 3319 nd->nd_repstat = ESTALE; 3320 goto out; 3321 } 3322 3323 if (startwrite) { 3324 mpw = mp; 3325 error = vn_start_write(NULL, &mpw, V_WAIT); 3326 if (error != 0) { 3327 mpw = NULL; 3328 vfs_unbusy(mp); 3329 nd->nd_repstat = ESTALE; 3330 goto out; 3331 } 3332 if (lktype == LK_SHARED && !(MNT_SHARED_WRITES(mp))) 3333 lktype = LK_EXCLUSIVE; 3334 } else 3335 mpw = NULL; 3336 3337 nd->nd_repstat = nfsvno_fhtovp(mp, fhp, nd->nd_nam, lktype, vpp, exp, 3338 &credanon); 3339 vfs_unbusy(mp); 3340 3341 /* 3342 * For NFSv4 without a pseudo root fs, unexported file handles 3343 * can be returned, so that Lookup works everywhere. 3344 */ 3345 if (!nd->nd_repstat && exp->nes_exflag == 0 && 3346 !(nd->nd_flag & ND_NFSV4)) { 3347 vput(*vpp); 3348 *vpp = NULL; 3349 nd->nd_repstat = EACCES; 3350 } 3351 3352 /* 3353 * Personally, I've never seen any point in requiring a 3354 * reserved port#, since only in the rare case where the 3355 * clients are all boxes with secure system privileges, 3356 * does it provide any enhanced security, but... some people 3357 * believe it to be useful and keep putting this code back in. 3358 * (There is also some "security checker" out there that 3359 * complains if the nfs server doesn't enforce this.) 3360 * However, note the following: 3361 * RFC3530 (NFSv4) specifies that a reserved port# not be 3362 * required. 3363 * RFC2623 recommends that, if a reserved port# is checked for, 3364 * that there be a way to turn that off--> ifdef'd. 3365 */ 3366 #ifdef NFS_REQRSVPORT 3367 if (!nd->nd_repstat) { 3368 struct sockaddr_in *saddr; 3369 struct sockaddr_in6 *saddr6; 3370 3371 saddr = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in *); 3372 saddr6 = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in6 *); 3373 if (!(nd->nd_flag & ND_NFSV4) && 3374 ((saddr->sin_family == AF_INET && 3375 ntohs(saddr->sin_port) >= IPPORT_RESERVED) || 3376 (saddr6->sin6_family == AF_INET6 && 3377 ntohs(saddr6->sin6_port) >= IPPORT_RESERVED))) { 3378 vput(*vpp); 3379 nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK); 3380 } 3381 } 3382 #endif /* NFS_REQRSVPORT */ 3383 3384 /* 3385 * Check/setup credentials. 3386 */ 3387 if (!nd->nd_repstat) { 3388 nd->nd_saveduid = nd->nd_cred->cr_uid; 3389 nd->nd_repstat = nfsd_excred(nd, exp, credanon, 3390 nfsrv_checkwrongsec(nd, nextop, (*vpp)->v_type)); 3391 if (nd->nd_repstat) 3392 vput(*vpp); 3393 } 3394 if (credanon != NULL) 3395 crfree(credanon); 3396 if (nd->nd_repstat) { 3397 vn_finished_write(mpw); 3398 *vpp = NULL; 3399 } else if (mpp != NULL) { 3400 *mpp = mpw; 3401 } 3402 3403 out: 3404 NFSEXITCODE2(0, nd); 3405 } 3406 3407 /* 3408 * glue for fp. 3409 */ 3410 static int 3411 fp_getfvp(struct thread *p, int fd, struct file **fpp, struct vnode **vpp) 3412 { 3413 struct filedesc *fdp; 3414 struct file *fp; 3415 int error = 0; 3416 3417 fdp = p->td_proc->p_fd; 3418 if (fd < 0 || fd >= fdp->fd_nfiles || 3419 (fp = fdp->fd_ofiles[fd].fde_file) == NULL) { 3420 error = EBADF; 3421 goto out; 3422 } 3423 *fpp = fp; 3424 3425 out: 3426 NFSEXITCODE(error); 3427 return (error); 3428 } 3429 3430 /* 3431 * Called from nfssvc() to update the exports list. Just call 3432 * vfs_export(). This has to be done, since the v4 root fake fs isn't 3433 * in the mount list. 3434 */ 3435 int 3436 nfsrv_v4rootexport(void *argp, struct ucred *cred, struct thread *p) 3437 { 3438 struct nfsex_args *nfsexargp = (struct nfsex_args *)argp; 3439 int error = 0; 3440 struct nameidata nd; 3441 fhandle_t fh; 3442 3443 error = vfs_export(&nfsv4root_mnt, &nfsexargp->export); 3444 if ((nfsexargp->export.ex_flags & MNT_DELEXPORT) != 0) 3445 nfs_rootfhset = 0; 3446 else if (error == 0) { 3447 if (nfsexargp->fspec == NULL) { 3448 error = EPERM; 3449 goto out; 3450 } 3451 /* 3452 * If fspec != NULL, this is the v4root path. 3453 */ 3454 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, nfsexargp->fspec); 3455 if ((error = namei(&nd)) != 0) 3456 goto out; 3457 error = nfsvno_getfh(nd.ni_vp, &fh, p); 3458 vrele(nd.ni_vp); 3459 if (!error) { 3460 nfs_rootfh.nfsrvfh_len = NFSX_MYFH; 3461 NFSBCOPY((caddr_t)&fh, 3462 nfs_rootfh.nfsrvfh_data, 3463 sizeof (fhandle_t)); 3464 nfs_rootfhset = 1; 3465 } 3466 } 3467 3468 out: 3469 NFSEXITCODE(error); 3470 return (error); 3471 } 3472 3473 /* 3474 * This function needs to test to see if the system is near its limit 3475 * for memory allocation via malloc() or mget() and return True iff 3476 * either of these resources are near their limit. 3477 * XXX (For now, this is just a stub.) 3478 */ 3479 int nfsrv_testmalloclimit = 0; 3480 int 3481 nfsrv_mallocmget_limit(void) 3482 { 3483 static int printmesg = 0; 3484 static int testval = 1; 3485 3486 if (nfsrv_testmalloclimit && (testval++ % 1000) == 0) { 3487 if ((printmesg++ % 100) == 0) 3488 printf("nfsd: malloc/mget near limit\n"); 3489 return (1); 3490 } 3491 return (0); 3492 } 3493 3494 /* 3495 * BSD specific initialization of a mount point. 3496 */ 3497 void 3498 nfsd_mntinit(void) 3499 { 3500 static int inited = 0; 3501 3502 if (inited) 3503 return; 3504 inited = 1; 3505 nfsv4root_mnt.mnt_flag = (MNT_RDONLY | MNT_EXPORTED); 3506 TAILQ_INIT(&nfsv4root_mnt.mnt_nvnodelist); 3507 TAILQ_INIT(&nfsv4root_mnt.mnt_lazyvnodelist); 3508 nfsv4root_mnt.mnt_export = NULL; 3509 TAILQ_INIT(&nfsv4root_opt); 3510 TAILQ_INIT(&nfsv4root_newopt); 3511 nfsv4root_mnt.mnt_opt = &nfsv4root_opt; 3512 nfsv4root_mnt.mnt_optnew = &nfsv4root_newopt; 3513 nfsv4root_mnt.mnt_nvnodelistsize = 0; 3514 nfsv4root_mnt.mnt_lazyvnodelistsize = 0; 3515 } 3516 3517 static void 3518 nfsd_timer(void *arg) 3519 { 3520 3521 nfsrv_servertimer(); 3522 callout_reset_sbt(&nfsd_callout, SBT_1S, SBT_1S, nfsd_timer, NULL, 0); 3523 } 3524 3525 /* 3526 * Get a vnode for a file handle, without checking exports, etc. 3527 */ 3528 struct vnode * 3529 nfsvno_getvp(fhandle_t *fhp) 3530 { 3531 struct mount *mp; 3532 struct vnode *vp; 3533 int error; 3534 3535 mp = vfs_busyfs(&fhp->fh_fsid); 3536 if (mp == NULL) 3537 return (NULL); 3538 error = VFS_FHTOVP(mp, &fhp->fh_fid, LK_EXCLUSIVE, &vp); 3539 vfs_unbusy(mp); 3540 if (error) 3541 return (NULL); 3542 return (vp); 3543 } 3544 3545 /* 3546 * Do a local VOP_ADVLOCK(). 3547 */ 3548 int 3549 nfsvno_advlock(struct vnode *vp, int ftype, u_int64_t first, 3550 u_int64_t end, struct thread *td) 3551 { 3552 int error = 0; 3553 struct flock fl; 3554 u_int64_t tlen; 3555 3556 if (nfsrv_dolocallocks == 0) 3557 goto out; 3558 ASSERT_VOP_UNLOCKED(vp, "nfsvno_advlock: vp locked"); 3559 3560 fl.l_whence = SEEK_SET; 3561 fl.l_type = ftype; 3562 fl.l_start = (off_t)first; 3563 if (end == NFS64BITSSET) { 3564 fl.l_len = 0; 3565 } else { 3566 tlen = end - first; 3567 fl.l_len = (off_t)tlen; 3568 } 3569 /* 3570 * For FreeBSD8, the l_pid and l_sysid must be set to the same 3571 * values for all calls, so that all locks will be held by the 3572 * nfsd server. (The nfsd server handles conflicts between the 3573 * various clients.) 3574 * Since an NFSv4 lockowner is a ClientID plus an array of up to 1024 3575 * bytes, so it can't be put in l_sysid. 3576 */ 3577 if (nfsv4_sysid == 0) 3578 nfsv4_sysid = nlm_acquire_next_sysid(); 3579 fl.l_pid = (pid_t)0; 3580 fl.l_sysid = (int)nfsv4_sysid; 3581 3582 if (ftype == F_UNLCK) 3583 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_UNLCK, &fl, 3584 (F_POSIX | F_REMOTE)); 3585 else 3586 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_SETLK, &fl, 3587 (F_POSIX | F_REMOTE)); 3588 3589 out: 3590 NFSEXITCODE(error); 3591 return (error); 3592 } 3593 3594 /* 3595 * Check the nfsv4 root exports. 3596 */ 3597 int 3598 nfsvno_v4rootexport(struct nfsrv_descript *nd) 3599 { 3600 struct ucred *credanon; 3601 int error = 0, numsecflavor, secflavors[MAXSECFLAVORS], i; 3602 uint64_t exflags; 3603 3604 error = vfs_stdcheckexp(&nfsv4root_mnt, nd->nd_nam, &exflags, 3605 &credanon, &numsecflavor, secflavors); 3606 if (error) { 3607 error = NFSERR_PROGUNAVAIL; 3608 goto out; 3609 } 3610 if (credanon != NULL) 3611 crfree(credanon); 3612 for (i = 0; i < numsecflavor; i++) { 3613 if (secflavors[i] == AUTH_SYS) 3614 nd->nd_flag |= ND_EXAUTHSYS; 3615 else if (secflavors[i] == RPCSEC_GSS_KRB5) 3616 nd->nd_flag |= ND_EXGSS; 3617 else if (secflavors[i] == RPCSEC_GSS_KRB5I) 3618 nd->nd_flag |= ND_EXGSSINTEGRITY; 3619 else if (secflavors[i] == RPCSEC_GSS_KRB5P) 3620 nd->nd_flag |= ND_EXGSSPRIVACY; 3621 } 3622 3623 /* And set ND_EXxx flags for TLS. */ 3624 if ((exflags & MNT_EXTLS) != 0) { 3625 nd->nd_flag |= ND_EXTLS; 3626 if ((exflags & MNT_EXTLSCERT) != 0) 3627 nd->nd_flag |= ND_EXTLSCERT; 3628 if ((exflags & MNT_EXTLSCERTUSER) != 0) 3629 nd->nd_flag |= ND_EXTLSCERTUSER; 3630 } 3631 3632 out: 3633 NFSEXITCODE(error); 3634 return (error); 3635 } 3636 3637 /* 3638 * Nfs server pseudo system call for the nfsd's 3639 */ 3640 /* 3641 * MPSAFE 3642 */ 3643 static int 3644 nfssvc_nfsd(struct thread *td, struct nfssvc_args *uap) 3645 { 3646 struct file *fp; 3647 struct nfsd_addsock_args sockarg; 3648 struct nfsd_nfsd_args nfsdarg; 3649 struct nfsd_nfsd_oargs onfsdarg; 3650 struct nfsd_pnfsd_args pnfsdarg; 3651 struct vnode *vp, *nvp, *curdvp; 3652 struct pnfsdsfile *pf; 3653 struct nfsdevice *ds, *fds; 3654 cap_rights_t rights; 3655 int buflen, error, ret; 3656 char *buf, *cp, *cp2, *cp3; 3657 char fname[PNFS_FILENAME_LEN + 1]; 3658 3659 if (uap->flag & NFSSVC_NFSDADDSOCK) { 3660 error = copyin(uap->argp, (caddr_t)&sockarg, sizeof (sockarg)); 3661 if (error) 3662 goto out; 3663 /* 3664 * Since we don't know what rights might be required, 3665 * pretend that we need them all. It is better to be too 3666 * careful than too reckless. 3667 */ 3668 error = fget(td, sockarg.sock, 3669 cap_rights_init_one(&rights, CAP_SOCK_SERVER), &fp); 3670 if (error != 0) 3671 goto out; 3672 if (fp->f_type != DTYPE_SOCKET) { 3673 fdrop(fp, td); 3674 error = EPERM; 3675 goto out; 3676 } 3677 error = nfsrvd_addsock(fp); 3678 fdrop(fp, td); 3679 } else if (uap->flag & NFSSVC_NFSDNFSD) { 3680 if (uap->argp == NULL) { 3681 error = EINVAL; 3682 goto out; 3683 } 3684 if ((uap->flag & NFSSVC_NEWSTRUCT) == 0) { 3685 error = copyin(uap->argp, &onfsdarg, sizeof(onfsdarg)); 3686 if (error == 0) { 3687 nfsdarg.principal = onfsdarg.principal; 3688 nfsdarg.minthreads = onfsdarg.minthreads; 3689 nfsdarg.maxthreads = onfsdarg.maxthreads; 3690 nfsdarg.version = 1; 3691 nfsdarg.addr = NULL; 3692 nfsdarg.addrlen = 0; 3693 nfsdarg.dnshost = NULL; 3694 nfsdarg.dnshostlen = 0; 3695 nfsdarg.dspath = NULL; 3696 nfsdarg.dspathlen = 0; 3697 nfsdarg.mdspath = NULL; 3698 nfsdarg.mdspathlen = 0; 3699 nfsdarg.mirrorcnt = 1; 3700 } 3701 } else 3702 error = copyin(uap->argp, &nfsdarg, sizeof(nfsdarg)); 3703 if (error) 3704 goto out; 3705 if (nfsdarg.addrlen > 0 && nfsdarg.addrlen < 10000 && 3706 nfsdarg.dnshostlen > 0 && nfsdarg.dnshostlen < 10000 && 3707 nfsdarg.dspathlen > 0 && nfsdarg.dspathlen < 10000 && 3708 nfsdarg.mdspathlen > 0 && nfsdarg.mdspathlen < 10000 && 3709 nfsdarg.mirrorcnt >= 1 && 3710 nfsdarg.mirrorcnt <= NFSDEV_MAXMIRRORS && 3711 nfsdarg.addr != NULL && nfsdarg.dnshost != NULL && 3712 nfsdarg.dspath != NULL && nfsdarg.mdspath != NULL) { 3713 NFSD_DEBUG(1, "addrlen=%d dspathlen=%d dnslen=%d" 3714 " mdspathlen=%d mirrorcnt=%d\n", nfsdarg.addrlen, 3715 nfsdarg.dspathlen, nfsdarg.dnshostlen, 3716 nfsdarg.mdspathlen, nfsdarg.mirrorcnt); 3717 cp = malloc(nfsdarg.addrlen + 1, M_TEMP, M_WAITOK); 3718 error = copyin(nfsdarg.addr, cp, nfsdarg.addrlen); 3719 if (error != 0) { 3720 free(cp, M_TEMP); 3721 goto out; 3722 } 3723 cp[nfsdarg.addrlen] = '\0'; /* Ensure nul term. */ 3724 nfsdarg.addr = cp; 3725 cp = malloc(nfsdarg.dnshostlen + 1, M_TEMP, M_WAITOK); 3726 error = copyin(nfsdarg.dnshost, cp, nfsdarg.dnshostlen); 3727 if (error != 0) { 3728 free(nfsdarg.addr, M_TEMP); 3729 free(cp, M_TEMP); 3730 goto out; 3731 } 3732 cp[nfsdarg.dnshostlen] = '\0'; /* Ensure nul term. */ 3733 nfsdarg.dnshost = cp; 3734 cp = malloc(nfsdarg.dspathlen + 1, M_TEMP, M_WAITOK); 3735 error = copyin(nfsdarg.dspath, cp, nfsdarg.dspathlen); 3736 if (error != 0) { 3737 free(nfsdarg.addr, M_TEMP); 3738 free(nfsdarg.dnshost, M_TEMP); 3739 free(cp, M_TEMP); 3740 goto out; 3741 } 3742 cp[nfsdarg.dspathlen] = '\0'; /* Ensure nul term. */ 3743 nfsdarg.dspath = cp; 3744 cp = malloc(nfsdarg.mdspathlen + 1, M_TEMP, M_WAITOK); 3745 error = copyin(nfsdarg.mdspath, cp, nfsdarg.mdspathlen); 3746 if (error != 0) { 3747 free(nfsdarg.addr, M_TEMP); 3748 free(nfsdarg.dnshost, M_TEMP); 3749 free(nfsdarg.dspath, M_TEMP); 3750 free(cp, M_TEMP); 3751 goto out; 3752 } 3753 cp[nfsdarg.mdspathlen] = '\0'; /* Ensure nul term. */ 3754 nfsdarg.mdspath = cp; 3755 } else { 3756 nfsdarg.addr = NULL; 3757 nfsdarg.addrlen = 0; 3758 nfsdarg.dnshost = NULL; 3759 nfsdarg.dnshostlen = 0; 3760 nfsdarg.dspath = NULL; 3761 nfsdarg.dspathlen = 0; 3762 nfsdarg.mdspath = NULL; 3763 nfsdarg.mdspathlen = 0; 3764 nfsdarg.mirrorcnt = 1; 3765 } 3766 nfsd_timer(NULL); 3767 error = nfsrvd_nfsd(td, &nfsdarg); 3768 free(nfsdarg.addr, M_TEMP); 3769 free(nfsdarg.dnshost, M_TEMP); 3770 free(nfsdarg.dspath, M_TEMP); 3771 free(nfsdarg.mdspath, M_TEMP); 3772 } else if (uap->flag & NFSSVC_PNFSDS) { 3773 error = copyin(uap->argp, &pnfsdarg, sizeof(pnfsdarg)); 3774 if (error == 0 && (pnfsdarg.op == PNFSDOP_DELDSSERVER || 3775 pnfsdarg.op == PNFSDOP_FORCEDELDS)) { 3776 cp = malloc(PATH_MAX + 1, M_TEMP, M_WAITOK); 3777 error = copyinstr(pnfsdarg.dspath, cp, PATH_MAX + 1, 3778 NULL); 3779 if (error == 0) 3780 error = nfsrv_deldsserver(pnfsdarg.op, cp, td); 3781 free(cp, M_TEMP); 3782 } else if (error == 0 && pnfsdarg.op == PNFSDOP_COPYMR) { 3783 cp = malloc(PATH_MAX + 1, M_TEMP, M_WAITOK); 3784 buflen = sizeof(*pf) * NFSDEV_MAXMIRRORS; 3785 buf = malloc(buflen, M_TEMP, M_WAITOK); 3786 error = copyinstr(pnfsdarg.mdspath, cp, PATH_MAX + 1, 3787 NULL); 3788 NFSD_DEBUG(4, "pnfsdcopymr cp mdspath=%d\n", error); 3789 if (error == 0 && pnfsdarg.dspath != NULL) { 3790 cp2 = malloc(PATH_MAX + 1, M_TEMP, M_WAITOK); 3791 error = copyinstr(pnfsdarg.dspath, cp2, 3792 PATH_MAX + 1, NULL); 3793 NFSD_DEBUG(4, "pnfsdcopymr cp dspath=%d\n", 3794 error); 3795 } else 3796 cp2 = NULL; 3797 if (error == 0 && pnfsdarg.curdspath != NULL) { 3798 cp3 = malloc(PATH_MAX + 1, M_TEMP, M_WAITOK); 3799 error = copyinstr(pnfsdarg.curdspath, cp3, 3800 PATH_MAX + 1, NULL); 3801 NFSD_DEBUG(4, "pnfsdcopymr cp curdspath=%d\n", 3802 error); 3803 } else 3804 cp3 = NULL; 3805 curdvp = NULL; 3806 fds = NULL; 3807 if (error == 0) 3808 error = nfsrv_mdscopymr(cp, cp2, cp3, buf, 3809 &buflen, fname, td, &vp, &nvp, &pf, &ds, 3810 &fds); 3811 NFSD_DEBUG(4, "nfsrv_mdscopymr=%d\n", error); 3812 if (error == 0) { 3813 if (pf->dsf_dir >= nfsrv_dsdirsize) { 3814 printf("copymr: dsdir out of range\n"); 3815 pf->dsf_dir = 0; 3816 } 3817 NFSD_DEBUG(4, "copymr: buflen=%d\n", buflen); 3818 error = nfsrv_copymr(vp, nvp, 3819 ds->nfsdev_dsdir[pf->dsf_dir], ds, pf, 3820 (struct pnfsdsfile *)buf, 3821 buflen / sizeof(*pf), td->td_ucred, td); 3822 vput(vp); 3823 vput(nvp); 3824 if (fds != NULL && error == 0) { 3825 curdvp = fds->nfsdev_dsdir[pf->dsf_dir]; 3826 ret = vn_lock(curdvp, LK_EXCLUSIVE); 3827 if (ret == 0) { 3828 nfsrv_dsremove(curdvp, fname, 3829 td->td_ucred, td); 3830 NFSVOPUNLOCK(curdvp); 3831 } 3832 } 3833 NFSD_DEBUG(4, "nfsrv_copymr=%d\n", error); 3834 } 3835 free(cp, M_TEMP); 3836 free(cp2, M_TEMP); 3837 free(cp3, M_TEMP); 3838 free(buf, M_TEMP); 3839 } 3840 } else { 3841 error = nfssvc_srvcall(td, uap, td->td_ucred); 3842 } 3843 3844 out: 3845 NFSEXITCODE(error); 3846 return (error); 3847 } 3848 3849 static int 3850 nfssvc_srvcall(struct thread *p, struct nfssvc_args *uap, struct ucred *cred) 3851 { 3852 struct nfsex_args export; 3853 struct nfsex_oldargs oexp; 3854 struct file *fp = NULL; 3855 int stablefd, i, len; 3856 struct nfsd_clid adminrevoke; 3857 struct nfsd_dumplist dumplist; 3858 struct nfsd_dumpclients *dumpclients; 3859 struct nfsd_dumplocklist dumplocklist; 3860 struct nfsd_dumplocks *dumplocks; 3861 struct nameidata nd; 3862 vnode_t vp; 3863 int error = EINVAL, igotlock; 3864 struct proc *procp; 3865 gid_t *grps; 3866 static int suspend_nfsd = 0; 3867 3868 if (uap->flag & NFSSVC_PUBLICFH) { 3869 NFSBZERO((caddr_t)&nfs_pubfh.nfsrvfh_data, 3870 sizeof (fhandle_t)); 3871 error = copyin(uap->argp, 3872 &nfs_pubfh.nfsrvfh_data, sizeof (fhandle_t)); 3873 if (!error) 3874 nfs_pubfhset = 1; 3875 } else if ((uap->flag & (NFSSVC_V4ROOTEXPORT | NFSSVC_NEWSTRUCT)) == 3876 (NFSSVC_V4ROOTEXPORT | NFSSVC_NEWSTRUCT)) { 3877 error = copyin(uap->argp,(caddr_t)&export, 3878 sizeof (struct nfsex_args)); 3879 if (!error) { 3880 grps = NULL; 3881 if (export.export.ex_ngroups > NGROUPS_MAX || 3882 export.export.ex_ngroups < 0) 3883 error = EINVAL; 3884 else if (export.export.ex_ngroups > 0) { 3885 grps = malloc(export.export.ex_ngroups * 3886 sizeof(gid_t), M_TEMP, M_WAITOK); 3887 error = copyin(export.export.ex_groups, grps, 3888 export.export.ex_ngroups * sizeof(gid_t)); 3889 export.export.ex_groups = grps; 3890 } else 3891 export.export.ex_groups = NULL; 3892 if (!error) 3893 error = nfsrv_v4rootexport(&export, cred, p); 3894 free(grps, M_TEMP); 3895 } 3896 } else if ((uap->flag & (NFSSVC_V4ROOTEXPORT | NFSSVC_NEWSTRUCT)) == 3897 NFSSVC_V4ROOTEXPORT) { 3898 error = copyin(uap->argp,(caddr_t)&oexp, 3899 sizeof (struct nfsex_oldargs)); 3900 if (!error) { 3901 memset(&export.export, 0, sizeof(export.export)); 3902 export.export.ex_flags = (uint64_t)oexp.export.ex_flags; 3903 export.export.ex_root = oexp.export.ex_root; 3904 export.export.ex_uid = oexp.export.ex_anon.cr_uid; 3905 export.export.ex_ngroups = 3906 oexp.export.ex_anon.cr_ngroups; 3907 export.export.ex_groups = NULL; 3908 if (export.export.ex_ngroups > XU_NGROUPS || 3909 export.export.ex_ngroups < 0) 3910 error = EINVAL; 3911 else if (export.export.ex_ngroups > 0) { 3912 export.export.ex_groups = malloc( 3913 export.export.ex_ngroups * sizeof(gid_t), 3914 M_TEMP, M_WAITOK); 3915 for (i = 0; i < export.export.ex_ngroups; i++) 3916 export.export.ex_groups[i] = 3917 oexp.export.ex_anon.cr_groups[i]; 3918 } 3919 export.export.ex_addr = oexp.export.ex_addr; 3920 export.export.ex_addrlen = oexp.export.ex_addrlen; 3921 export.export.ex_mask = oexp.export.ex_mask; 3922 export.export.ex_masklen = oexp.export.ex_masklen; 3923 export.export.ex_indexfile = oexp.export.ex_indexfile; 3924 export.export.ex_numsecflavors = 3925 oexp.export.ex_numsecflavors; 3926 if (export.export.ex_numsecflavors >= MAXSECFLAVORS || 3927 export.export.ex_numsecflavors < 0) 3928 error = EINVAL; 3929 else { 3930 for (i = 0; i < export.export.ex_numsecflavors; 3931 i++) 3932 export.export.ex_secflavors[i] = 3933 oexp.export.ex_secflavors[i]; 3934 } 3935 export.fspec = oexp.fspec; 3936 if (error == 0) 3937 error = nfsrv_v4rootexport(&export, cred, p); 3938 free(export.export.ex_groups, M_TEMP); 3939 } 3940 } else if (uap->flag & NFSSVC_NOPUBLICFH) { 3941 nfs_pubfhset = 0; 3942 error = 0; 3943 } else if (uap->flag & NFSSVC_STABLERESTART) { 3944 error = copyin(uap->argp, (caddr_t)&stablefd, 3945 sizeof (int)); 3946 if (!error) 3947 error = fp_getfvp(p, stablefd, &fp, &vp); 3948 if (!error && (NFSFPFLAG(fp) & (FREAD | FWRITE)) != (FREAD | FWRITE)) 3949 error = EBADF; 3950 if (!error && newnfs_numnfsd != 0) 3951 error = EPERM; 3952 if (!error) { 3953 nfsrv_stablefirst.nsf_fp = fp; 3954 nfsrv_setupstable(p); 3955 } 3956 } else if (uap->flag & NFSSVC_ADMINREVOKE) { 3957 error = copyin(uap->argp, (caddr_t)&adminrevoke, 3958 sizeof (struct nfsd_clid)); 3959 if (!error) 3960 error = nfsrv_adminrevoke(&adminrevoke, p); 3961 } else if (uap->flag & NFSSVC_DUMPCLIENTS) { 3962 error = copyin(uap->argp, (caddr_t)&dumplist, 3963 sizeof (struct nfsd_dumplist)); 3964 if (!error && (dumplist.ndl_size < 1 || 3965 dumplist.ndl_size > NFSRV_MAXDUMPLIST)) 3966 error = EPERM; 3967 if (!error) { 3968 len = sizeof (struct nfsd_dumpclients) * dumplist.ndl_size; 3969 dumpclients = malloc(len, M_TEMP, M_WAITOK | M_ZERO); 3970 nfsrv_dumpclients(dumpclients, dumplist.ndl_size); 3971 error = copyout(dumpclients, dumplist.ndl_list, len); 3972 free(dumpclients, M_TEMP); 3973 } 3974 } else if (uap->flag & NFSSVC_DUMPLOCKS) { 3975 error = copyin(uap->argp, (caddr_t)&dumplocklist, 3976 sizeof (struct nfsd_dumplocklist)); 3977 if (!error && (dumplocklist.ndllck_size < 1 || 3978 dumplocklist.ndllck_size > NFSRV_MAXDUMPLIST)) 3979 error = EPERM; 3980 if (!error) 3981 error = nfsrv_lookupfilename(&nd, 3982 dumplocklist.ndllck_fname, p); 3983 if (!error) { 3984 len = sizeof (struct nfsd_dumplocks) * 3985 dumplocklist.ndllck_size; 3986 dumplocks = malloc(len, M_TEMP, M_WAITOK | M_ZERO); 3987 nfsrv_dumplocks(nd.ni_vp, dumplocks, 3988 dumplocklist.ndllck_size, p); 3989 vput(nd.ni_vp); 3990 error = copyout(dumplocks, dumplocklist.ndllck_list, 3991 len); 3992 free(dumplocks, M_TEMP); 3993 } 3994 } else if (uap->flag & NFSSVC_BACKUPSTABLE) { 3995 procp = p->td_proc; 3996 PROC_LOCK(procp); 3997 nfsd_master_pid = procp->p_pid; 3998 bcopy(procp->p_comm, nfsd_master_comm, MAXCOMLEN + 1); 3999 nfsd_master_start = procp->p_stats->p_start; 4000 nfsd_master_proc = procp; 4001 PROC_UNLOCK(procp); 4002 } else if ((uap->flag & NFSSVC_SUSPENDNFSD) != 0) { 4003 NFSLOCKV4ROOTMUTEX(); 4004 if (suspend_nfsd == 0) { 4005 /* Lock out all nfsd threads */ 4006 do { 4007 igotlock = nfsv4_lock(&nfsd_suspend_lock, 1, 4008 NULL, NFSV4ROOTLOCKMUTEXPTR, NULL); 4009 } while (igotlock == 0 && suspend_nfsd == 0); 4010 suspend_nfsd = 1; 4011 } 4012 NFSUNLOCKV4ROOTMUTEX(); 4013 error = 0; 4014 } else if ((uap->flag & NFSSVC_RESUMENFSD) != 0) { 4015 NFSLOCKV4ROOTMUTEX(); 4016 if (suspend_nfsd != 0) { 4017 nfsv4_unlock(&nfsd_suspend_lock, 0); 4018 suspend_nfsd = 0; 4019 } 4020 NFSUNLOCKV4ROOTMUTEX(); 4021 error = 0; 4022 } 4023 4024 NFSEXITCODE(error); 4025 return (error); 4026 } 4027 4028 /* 4029 * Check exports. 4030 * Returns 0 if ok, 1 otherwise. 4031 */ 4032 int 4033 nfsvno_testexp(struct nfsrv_descript *nd, struct nfsexstuff *exp) 4034 { 4035 int i; 4036 4037 if ((NFSVNO_EXTLS(exp) && (nd->nd_flag & ND_TLS) == 0) || 4038 (NFSVNO_EXTLSCERT(exp) && 4039 (nd->nd_flag & ND_TLSCERT) == 0) || 4040 (NFSVNO_EXTLSCERTUSER(exp) && 4041 (nd->nd_flag & ND_TLSCERTUSER) == 0)) { 4042 if ((nd->nd_flag & ND_NFSV4) != 0) 4043 return (NFSERR_WRONGSEC); 4044 #ifdef notnow 4045 /* There is currently no auth_stat for this. */ 4046 else if ((nd->nd_flag & ND_TLS) == 0) 4047 return (NFSERR_AUTHERR | AUTH_NEEDS_TLS); 4048 else 4049 return (NFSERR_AUTHERR | AUTH_NEEDS_TLS_MUTUAL_HOST); 4050 #endif 4051 else 4052 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 4053 } 4054 4055 /* 4056 * RFC2623 suggests that the NFSv3 Fsinfo RPC be allowed to use 4057 * AUTH_NONE or AUTH_SYS for file systems requiring RPCSEC_GSS. 4058 */ 4059 if ((nd->nd_flag & ND_NFSV3) != 0 && nd->nd_procnum == NFSPROC_FSINFO) 4060 return (0); 4061 4062 /* 4063 * This seems odd, but allow the case where the security flavor 4064 * list is empty. This happens when NFSv4 is traversing non-exported 4065 * file systems. Exported file systems should always have a non-empty 4066 * security flavor list. 4067 */ 4068 if (exp->nes_numsecflavor == 0) 4069 return (0); 4070 4071 for (i = 0; i < exp->nes_numsecflavor; i++) { 4072 /* 4073 * The tests for privacy and integrity must be first, 4074 * since ND_GSS is set for everything but AUTH_SYS. 4075 */ 4076 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5P && 4077 (nd->nd_flag & ND_GSSPRIVACY)) 4078 return (0); 4079 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5I && 4080 (nd->nd_flag & ND_GSSINTEGRITY)) 4081 return (0); 4082 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5 && 4083 (nd->nd_flag & ND_GSS)) 4084 return (0); 4085 if (exp->nes_secflavors[i] == AUTH_SYS && 4086 (nd->nd_flag & ND_GSS) == 0) 4087 return (0); 4088 } 4089 if ((nd->nd_flag & ND_NFSV4) != 0) 4090 return (NFSERR_WRONGSEC); 4091 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 4092 } 4093 4094 /* 4095 * Calculate a hash value for the fid in a file handle. 4096 */ 4097 uint32_t 4098 nfsrv_hashfh(fhandle_t *fhp) 4099 { 4100 uint32_t hashval; 4101 4102 hashval = hash32_buf(&fhp->fh_fid, sizeof(struct fid), 0); 4103 return (hashval); 4104 } 4105 4106 /* 4107 * Calculate a hash value for the sessionid. 4108 */ 4109 uint32_t 4110 nfsrv_hashsessionid(uint8_t *sessionid) 4111 { 4112 uint32_t hashval; 4113 4114 hashval = hash32_buf(sessionid, NFSX_V4SESSIONID, 0); 4115 return (hashval); 4116 } 4117 4118 /* 4119 * Signal the userland master nfsd to backup the stable restart file. 4120 */ 4121 void 4122 nfsrv_backupstable(void) 4123 { 4124 struct proc *procp; 4125 4126 if (nfsd_master_proc != NULL) { 4127 procp = pfind(nfsd_master_pid); 4128 /* Try to make sure it is the correct process. */ 4129 if (procp == nfsd_master_proc && 4130 procp->p_stats->p_start.tv_sec == 4131 nfsd_master_start.tv_sec && 4132 procp->p_stats->p_start.tv_usec == 4133 nfsd_master_start.tv_usec && 4134 strcmp(procp->p_comm, nfsd_master_comm) == 0) 4135 kern_psignal(procp, SIGUSR2); 4136 else 4137 nfsd_master_proc = NULL; 4138 4139 if (procp != NULL) 4140 PROC_UNLOCK(procp); 4141 } 4142 } 4143 4144 /* 4145 * Create a DS data file for nfsrv_pnfscreate(). Called for each mirror. 4146 * The arguments are in a structure, so that they can be passed through 4147 * taskqueue for a kernel process to execute this function. 4148 */ 4149 struct nfsrvdscreate { 4150 int done; 4151 int inprog; 4152 struct task tsk; 4153 struct ucred *tcred; 4154 struct vnode *dvp; 4155 NFSPROC_T *p; 4156 struct pnfsdsfile *pf; 4157 int err; 4158 fhandle_t fh; 4159 struct vattr va; 4160 struct vattr createva; 4161 }; 4162 4163 int 4164 nfsrv_dscreate(struct vnode *dvp, struct vattr *vap, struct vattr *nvap, 4165 fhandle_t *fhp, struct pnfsdsfile *pf, struct pnfsdsattr *dsa, 4166 char *fnamep, struct ucred *tcred, NFSPROC_T *p, struct vnode **nvpp) 4167 { 4168 struct vnode *nvp; 4169 struct nameidata named; 4170 struct vattr va; 4171 char *bufp; 4172 u_long *hashp; 4173 struct nfsnode *np; 4174 struct nfsmount *nmp; 4175 int error; 4176 4177 NFSNAMEICNDSET(&named.ni_cnd, tcred, CREATE, 4178 LOCKPARENT | LOCKLEAF | NOCACHE); 4179 nfsvno_setpathbuf(&named, &bufp, &hashp); 4180 named.ni_cnd.cn_lkflags = LK_EXCLUSIVE; 4181 named.ni_cnd.cn_nameptr = bufp; 4182 if (fnamep != NULL) { 4183 strlcpy(bufp, fnamep, PNFS_FILENAME_LEN + 1); 4184 named.ni_cnd.cn_namelen = strlen(bufp); 4185 } else 4186 named.ni_cnd.cn_namelen = nfsrv_putfhname(fhp, bufp); 4187 NFSD_DEBUG(4, "nfsrv_dscreate: dvp=%p fname=%s\n", dvp, bufp); 4188 4189 /* Create the date file in the DS mount. */ 4190 error = NFSVOPLOCK(dvp, LK_EXCLUSIVE); 4191 if (error == 0) { 4192 error = VOP_CREATE(dvp, &nvp, &named.ni_cnd, vap); 4193 vref(dvp); 4194 VOP_VPUT_PAIR(dvp, error == 0 ? &nvp : NULL, false); 4195 if (error == 0) { 4196 /* Set the ownership of the file. */ 4197 error = VOP_SETATTR(nvp, nvap, tcred); 4198 NFSD_DEBUG(4, "nfsrv_dscreate:" 4199 " setattr-uid=%d\n", error); 4200 if (error != 0) 4201 vput(nvp); 4202 } 4203 if (error != 0) 4204 printf("pNFS: pnfscreate failed=%d\n", error); 4205 } else 4206 printf("pNFS: pnfscreate vnlock=%d\n", error); 4207 if (error == 0) { 4208 np = VTONFS(nvp); 4209 nmp = VFSTONFS(nvp->v_mount); 4210 if (strcmp(nvp->v_mount->mnt_vfc->vfc_name, "nfs") 4211 != 0 || nmp->nm_nam->sa_len > sizeof( 4212 struct sockaddr_in6) || 4213 np->n_fhp->nfh_len != NFSX_MYFH) { 4214 printf("Bad DS file: fstype=%s salen=%d" 4215 " fhlen=%d\n", 4216 nvp->v_mount->mnt_vfc->vfc_name, 4217 nmp->nm_nam->sa_len, np->n_fhp->nfh_len); 4218 error = ENOENT; 4219 } 4220 4221 /* Set extattrs for the DS on the MDS file. */ 4222 if (error == 0) { 4223 if (dsa != NULL) { 4224 error = VOP_GETATTR(nvp, &va, tcred); 4225 if (error == 0) { 4226 dsa->dsa_filerev = va.va_filerev; 4227 dsa->dsa_size = va.va_size; 4228 dsa->dsa_atime = va.va_atime; 4229 dsa->dsa_mtime = va.va_mtime; 4230 dsa->dsa_bytes = va.va_bytes; 4231 } 4232 } 4233 if (error == 0) { 4234 NFSBCOPY(np->n_fhp->nfh_fh, &pf->dsf_fh, 4235 NFSX_MYFH); 4236 NFSBCOPY(nmp->nm_nam, &pf->dsf_sin, 4237 nmp->nm_nam->sa_len); 4238 NFSBCOPY(named.ni_cnd.cn_nameptr, 4239 pf->dsf_filename, 4240 sizeof(pf->dsf_filename)); 4241 } 4242 } else 4243 printf("pNFS: pnfscreate can't get DS" 4244 " attr=%d\n", error); 4245 if (nvpp != NULL && error == 0) 4246 *nvpp = nvp; 4247 else 4248 vput(nvp); 4249 } 4250 nfsvno_relpathbuf(&named); 4251 return (error); 4252 } 4253 4254 /* 4255 * Start up the thread that will execute nfsrv_dscreate(). 4256 */ 4257 static void 4258 start_dscreate(void *arg, int pending) 4259 { 4260 struct nfsrvdscreate *dsc; 4261 4262 dsc = (struct nfsrvdscreate *)arg; 4263 dsc->err = nfsrv_dscreate(dsc->dvp, &dsc->createva, &dsc->va, &dsc->fh, 4264 dsc->pf, NULL, NULL, dsc->tcred, dsc->p, NULL); 4265 dsc->done = 1; 4266 NFSD_DEBUG(4, "start_dscreate: err=%d\n", dsc->err); 4267 } 4268 4269 /* 4270 * Create a pNFS data file on the Data Server(s). 4271 */ 4272 static void 4273 nfsrv_pnfscreate(struct vnode *vp, struct vattr *vap, struct ucred *cred, 4274 NFSPROC_T *p) 4275 { 4276 struct nfsrvdscreate *dsc, *tdsc = NULL; 4277 struct nfsdevice *ds, *tds, *fds; 4278 struct mount *mp; 4279 struct pnfsdsfile *pf, *tpf; 4280 struct pnfsdsattr dsattr; 4281 struct vattr va; 4282 struct vnode *dvp[NFSDEV_MAXMIRRORS]; 4283 struct nfsmount *nmp; 4284 fhandle_t fh; 4285 uid_t vauid; 4286 gid_t vagid; 4287 u_short vamode; 4288 struct ucred *tcred; 4289 int dsdir[NFSDEV_MAXMIRRORS], error, i, mirrorcnt, ret; 4290 int failpos, timo; 4291 4292 /* Get a DS server directory in a round-robin order. */ 4293 mirrorcnt = 1; 4294 mp = vp->v_mount; 4295 ds = fds = NULL; 4296 NFSDDSLOCK(); 4297 /* 4298 * Search for the first entry that handles this MDS fs, but use the 4299 * first entry for all MDS fs's otherwise. 4300 */ 4301 TAILQ_FOREACH(tds, &nfsrv_devidhead, nfsdev_list) { 4302 if (tds->nfsdev_nmp != NULL) { 4303 if (tds->nfsdev_mdsisset == 0 && ds == NULL) 4304 ds = tds; 4305 else if (tds->nfsdev_mdsisset != 0 && fsidcmp( 4306 &mp->mnt_stat.f_fsid, &tds->nfsdev_mdsfsid) == 0) { 4307 ds = fds = tds; 4308 break; 4309 } 4310 } 4311 } 4312 if (ds == NULL) { 4313 NFSDDSUNLOCK(); 4314 NFSD_DEBUG(4, "nfsrv_pnfscreate: no srv\n"); 4315 return; 4316 } 4317 i = dsdir[0] = ds->nfsdev_nextdir; 4318 ds->nfsdev_nextdir = (ds->nfsdev_nextdir + 1) % nfsrv_dsdirsize; 4319 dvp[0] = ds->nfsdev_dsdir[i]; 4320 tds = TAILQ_NEXT(ds, nfsdev_list); 4321 if (nfsrv_maxpnfsmirror > 1 && tds != NULL) { 4322 TAILQ_FOREACH_FROM(tds, &nfsrv_devidhead, nfsdev_list) { 4323 if (tds->nfsdev_nmp != NULL && 4324 ((tds->nfsdev_mdsisset == 0 && fds == NULL) || 4325 (tds->nfsdev_mdsisset != 0 && fds != NULL && 4326 fsidcmp(&mp->mnt_stat.f_fsid, 4327 &tds->nfsdev_mdsfsid) == 0))) { 4328 dsdir[mirrorcnt] = i; 4329 dvp[mirrorcnt] = tds->nfsdev_dsdir[i]; 4330 mirrorcnt++; 4331 if (mirrorcnt >= nfsrv_maxpnfsmirror) 4332 break; 4333 } 4334 } 4335 } 4336 /* Put at end of list to implement round-robin usage. */ 4337 TAILQ_REMOVE(&nfsrv_devidhead, ds, nfsdev_list); 4338 TAILQ_INSERT_TAIL(&nfsrv_devidhead, ds, nfsdev_list); 4339 NFSDDSUNLOCK(); 4340 dsc = NULL; 4341 if (mirrorcnt > 1) 4342 tdsc = dsc = malloc(sizeof(*dsc) * (mirrorcnt - 1), M_TEMP, 4343 M_WAITOK | M_ZERO); 4344 tpf = pf = malloc(sizeof(*pf) * nfsrv_maxpnfsmirror, M_TEMP, M_WAITOK | 4345 M_ZERO); 4346 4347 error = nfsvno_getfh(vp, &fh, p); 4348 if (error == 0) 4349 error = VOP_GETATTR(vp, &va, cred); 4350 if (error == 0) { 4351 /* Set the attributes for "vp" to Setattr the DS vp. */ 4352 vauid = va.va_uid; 4353 vagid = va.va_gid; 4354 vamode = va.va_mode; 4355 VATTR_NULL(&va); 4356 va.va_uid = vauid; 4357 va.va_gid = vagid; 4358 va.va_mode = vamode; 4359 va.va_size = 0; 4360 } else 4361 printf("pNFS: pnfscreate getfh+attr=%d\n", error); 4362 4363 NFSD_DEBUG(4, "nfsrv_pnfscreate: cruid=%d crgid=%d\n", cred->cr_uid, 4364 cred->cr_gid); 4365 /* Make data file name based on FH. */ 4366 tcred = newnfs_getcred(); 4367 4368 /* 4369 * Create the file on each DS mirror, using kernel process(es) for the 4370 * additional mirrors. 4371 */ 4372 failpos = -1; 4373 for (i = 0; i < mirrorcnt - 1 && error == 0; i++, tpf++, tdsc++) { 4374 tpf->dsf_dir = dsdir[i]; 4375 tdsc->tcred = tcred; 4376 tdsc->p = p; 4377 tdsc->pf = tpf; 4378 tdsc->createva = *vap; 4379 NFSBCOPY(&fh, &tdsc->fh, sizeof(fh)); 4380 tdsc->va = va; 4381 tdsc->dvp = dvp[i]; 4382 tdsc->done = 0; 4383 tdsc->inprog = 0; 4384 tdsc->err = 0; 4385 ret = EIO; 4386 if (nfs_pnfsiothreads != 0) { 4387 ret = nfs_pnfsio(start_dscreate, tdsc); 4388 NFSD_DEBUG(4, "nfsrv_pnfscreate: nfs_pnfsio=%d\n", ret); 4389 } 4390 if (ret != 0) { 4391 ret = nfsrv_dscreate(dvp[i], vap, &va, &fh, tpf, NULL, 4392 NULL, tcred, p, NULL); 4393 if (ret != 0) { 4394 KASSERT(error == 0, ("nfsrv_dscreate err=%d", 4395 error)); 4396 if (failpos == -1 && nfsds_failerr(ret)) 4397 failpos = i; 4398 else 4399 error = ret; 4400 } 4401 } 4402 } 4403 if (error == 0) { 4404 tpf->dsf_dir = dsdir[mirrorcnt - 1]; 4405 error = nfsrv_dscreate(dvp[mirrorcnt - 1], vap, &va, &fh, tpf, 4406 &dsattr, NULL, tcred, p, NULL); 4407 if (failpos == -1 && mirrorcnt > 1 && nfsds_failerr(error)) { 4408 failpos = mirrorcnt - 1; 4409 error = 0; 4410 } 4411 } 4412 timo = hz / 50; /* Wait for 20msec. */ 4413 if (timo < 1) 4414 timo = 1; 4415 /* Wait for kernel task(s) to complete. */ 4416 for (tdsc = dsc, i = 0; i < mirrorcnt - 1; i++, tdsc++) { 4417 while (tdsc->inprog != 0 && tdsc->done == 0) 4418 tsleep(&tdsc->tsk, PVFS, "srvdcr", timo); 4419 if (tdsc->err != 0) { 4420 if (failpos == -1 && nfsds_failerr(tdsc->err)) 4421 failpos = i; 4422 else if (error == 0) 4423 error = tdsc->err; 4424 } 4425 } 4426 4427 /* 4428 * If failpos has been set, that mirror has failed, so it needs 4429 * to be disabled. 4430 */ 4431 if (failpos >= 0) { 4432 nmp = VFSTONFS(dvp[failpos]->v_mount); 4433 NFSLOCKMNT(nmp); 4434 if ((nmp->nm_privflag & (NFSMNTP_FORCEDISM | 4435 NFSMNTP_CANCELRPCS)) == 0) { 4436 nmp->nm_privflag |= NFSMNTP_CANCELRPCS; 4437 NFSUNLOCKMNT(nmp); 4438 ds = nfsrv_deldsnmp(PNFSDOP_DELDSSERVER, nmp, p); 4439 NFSD_DEBUG(4, "dscreatfail fail=%d ds=%p\n", failpos, 4440 ds); 4441 if (ds != NULL) 4442 nfsrv_killrpcs(nmp); 4443 NFSLOCKMNT(nmp); 4444 nmp->nm_privflag &= ~NFSMNTP_CANCELRPCS; 4445 wakeup(nmp); 4446 } 4447 NFSUNLOCKMNT(nmp); 4448 } 4449 4450 NFSFREECRED(tcred); 4451 if (error == 0) { 4452 ASSERT_VOP_ELOCKED(vp, "nfsrv_pnfscreate vp"); 4453 4454 NFSD_DEBUG(4, "nfsrv_pnfscreate: mirrorcnt=%d maxmirror=%d\n", 4455 mirrorcnt, nfsrv_maxpnfsmirror); 4456 /* 4457 * For all mirrors that couldn't be created, fill in the 4458 * *pf structure, but with an IP address == 0.0.0.0. 4459 */ 4460 tpf = pf + mirrorcnt; 4461 for (i = mirrorcnt; i < nfsrv_maxpnfsmirror; i++, tpf++) { 4462 *tpf = *pf; 4463 tpf->dsf_sin.sin_family = AF_INET; 4464 tpf->dsf_sin.sin_len = sizeof(struct sockaddr_in); 4465 tpf->dsf_sin.sin_addr.s_addr = 0; 4466 tpf->dsf_sin.sin_port = 0; 4467 } 4468 4469 error = vn_extattr_set(vp, IO_NODELOCKED, 4470 EXTATTR_NAMESPACE_SYSTEM, "pnfsd.dsfile", 4471 sizeof(*pf) * nfsrv_maxpnfsmirror, (char *)pf, p); 4472 if (error == 0) 4473 error = vn_extattr_set(vp, IO_NODELOCKED, 4474 EXTATTR_NAMESPACE_SYSTEM, "pnfsd.dsattr", 4475 sizeof(dsattr), (char *)&dsattr, p); 4476 if (error != 0) 4477 printf("pNFS: pnfscreate setextattr=%d\n", 4478 error); 4479 } else 4480 printf("pNFS: pnfscreate=%d\n", error); 4481 free(pf, M_TEMP); 4482 free(dsc, M_TEMP); 4483 } 4484 4485 /* 4486 * Get the information needed to remove the pNFS Data Server file from the 4487 * Metadata file. Upon success, ddvp is set non-NULL to the locked 4488 * DS directory vnode. The caller must unlock *ddvp when done with it. 4489 */ 4490 static void 4491 nfsrv_pnfsremovesetup(struct vnode *vp, NFSPROC_T *p, struct vnode **dvpp, 4492 int *mirrorcntp, char *fname, fhandle_t *fhp) 4493 { 4494 struct vattr va; 4495 struct ucred *tcred; 4496 char *buf; 4497 int buflen, error; 4498 4499 dvpp[0] = NULL; 4500 /* If not an exported regular file or not a pNFS server, just return. */ 4501 if (vp->v_type != VREG || (vp->v_mount->mnt_flag & MNT_EXPORTED) == 0 || 4502 nfsrv_devidcnt == 0) 4503 return; 4504 4505 /* Check to see if this is the last hard link. */ 4506 tcred = newnfs_getcred(); 4507 error = VOP_GETATTR(vp, &va, tcred); 4508 NFSFREECRED(tcred); 4509 if (error != 0) { 4510 printf("pNFS: nfsrv_pnfsremovesetup getattr=%d\n", error); 4511 return; 4512 } 4513 if (va.va_nlink > 1) 4514 return; 4515 4516 error = nfsvno_getfh(vp, fhp, p); 4517 if (error != 0) { 4518 printf("pNFS: nfsrv_pnfsremovesetup getfh=%d\n", error); 4519 return; 4520 } 4521 4522 buflen = 1024; 4523 buf = malloc(buflen, M_TEMP, M_WAITOK); 4524 /* Get the directory vnode for the DS mount and the file handle. */ 4525 error = nfsrv_dsgetsockmnt(vp, 0, buf, &buflen, mirrorcntp, p, dvpp, 4526 NULL, NULL, fname, NULL, NULL, NULL, NULL, NULL); 4527 free(buf, M_TEMP); 4528 if (error != 0) 4529 printf("pNFS: nfsrv_pnfsremovesetup getsockmnt=%d\n", error); 4530 } 4531 4532 /* 4533 * Remove a DS data file for nfsrv_pnfsremove(). Called for each mirror. 4534 * The arguments are in a structure, so that they can be passed through 4535 * taskqueue for a kernel process to execute this function. 4536 */ 4537 struct nfsrvdsremove { 4538 int done; 4539 int inprog; 4540 struct task tsk; 4541 struct ucred *tcred; 4542 struct vnode *dvp; 4543 NFSPROC_T *p; 4544 int err; 4545 char fname[PNFS_FILENAME_LEN + 1]; 4546 }; 4547 4548 static int 4549 nfsrv_dsremove(struct vnode *dvp, char *fname, struct ucred *tcred, 4550 NFSPROC_T *p) 4551 { 4552 struct nameidata named; 4553 struct vnode *nvp; 4554 char *bufp; 4555 u_long *hashp; 4556 int error; 4557 4558 error = NFSVOPLOCK(dvp, LK_EXCLUSIVE); 4559 if (error != 0) 4560 return (error); 4561 named.ni_cnd.cn_nameiop = DELETE; 4562 named.ni_cnd.cn_lkflags = LK_EXCLUSIVE | LK_RETRY; 4563 named.ni_cnd.cn_cred = tcred; 4564 named.ni_cnd.cn_flags = ISLASTCN | LOCKPARENT | LOCKLEAF; 4565 nfsvno_setpathbuf(&named, &bufp, &hashp); 4566 named.ni_cnd.cn_nameptr = bufp; 4567 named.ni_cnd.cn_namelen = strlen(fname); 4568 strlcpy(bufp, fname, NAME_MAX); 4569 NFSD_DEBUG(4, "nfsrv_pnfsremove: filename=%s\n", bufp); 4570 error = VOP_LOOKUP(dvp, &nvp, &named.ni_cnd); 4571 NFSD_DEBUG(4, "nfsrv_pnfsremove: aft LOOKUP=%d\n", error); 4572 if (error == 0) { 4573 error = VOP_REMOVE(dvp, nvp, &named.ni_cnd); 4574 vput(nvp); 4575 } 4576 NFSVOPUNLOCK(dvp); 4577 nfsvno_relpathbuf(&named); 4578 if (error != 0) 4579 printf("pNFS: nfsrv_pnfsremove failed=%d\n", error); 4580 return (error); 4581 } 4582 4583 /* 4584 * Start up the thread that will execute nfsrv_dsremove(). 4585 */ 4586 static void 4587 start_dsremove(void *arg, int pending) 4588 { 4589 struct nfsrvdsremove *dsrm; 4590 4591 dsrm = (struct nfsrvdsremove *)arg; 4592 dsrm->err = nfsrv_dsremove(dsrm->dvp, dsrm->fname, dsrm->tcred, 4593 dsrm->p); 4594 dsrm->done = 1; 4595 NFSD_DEBUG(4, "start_dsremove: err=%d\n", dsrm->err); 4596 } 4597 4598 /* 4599 * Remove a pNFS data file from a Data Server. 4600 * nfsrv_pnfsremovesetup() must have been called before the MDS file was 4601 * removed to set up the dvp and fill in the FH. 4602 */ 4603 static void 4604 nfsrv_pnfsremove(struct vnode **dvp, int mirrorcnt, char *fname, fhandle_t *fhp, 4605 NFSPROC_T *p) 4606 { 4607 struct ucred *tcred; 4608 struct nfsrvdsremove *dsrm, *tdsrm; 4609 struct nfsdevice *ds; 4610 struct nfsmount *nmp; 4611 int failpos, i, ret, timo; 4612 4613 tcred = newnfs_getcred(); 4614 dsrm = NULL; 4615 if (mirrorcnt > 1) 4616 dsrm = malloc(sizeof(*dsrm) * mirrorcnt - 1, M_TEMP, M_WAITOK); 4617 /* 4618 * Remove the file on each DS mirror, using kernel process(es) for the 4619 * additional mirrors. 4620 */ 4621 failpos = -1; 4622 for (tdsrm = dsrm, i = 0; i < mirrorcnt - 1; i++, tdsrm++) { 4623 tdsrm->tcred = tcred; 4624 tdsrm->p = p; 4625 tdsrm->dvp = dvp[i]; 4626 strlcpy(tdsrm->fname, fname, PNFS_FILENAME_LEN + 1); 4627 tdsrm->inprog = 0; 4628 tdsrm->done = 0; 4629 tdsrm->err = 0; 4630 ret = EIO; 4631 if (nfs_pnfsiothreads != 0) { 4632 ret = nfs_pnfsio(start_dsremove, tdsrm); 4633 NFSD_DEBUG(4, "nfsrv_pnfsremove: nfs_pnfsio=%d\n", ret); 4634 } 4635 if (ret != 0) { 4636 ret = nfsrv_dsremove(dvp[i], fname, tcred, p); 4637 if (failpos == -1 && nfsds_failerr(ret)) 4638 failpos = i; 4639 } 4640 } 4641 ret = nfsrv_dsremove(dvp[mirrorcnt - 1], fname, tcred, p); 4642 if (failpos == -1 && mirrorcnt > 1 && nfsds_failerr(ret)) 4643 failpos = mirrorcnt - 1; 4644 timo = hz / 50; /* Wait for 20msec. */ 4645 if (timo < 1) 4646 timo = 1; 4647 /* Wait for kernel task(s) to complete. */ 4648 for (tdsrm = dsrm, i = 0; i < mirrorcnt - 1; i++, tdsrm++) { 4649 while (tdsrm->inprog != 0 && tdsrm->done == 0) 4650 tsleep(&tdsrm->tsk, PVFS, "srvdsrm", timo); 4651 if (failpos == -1 && nfsds_failerr(tdsrm->err)) 4652 failpos = i; 4653 } 4654 4655 /* 4656 * If failpos has been set, that mirror has failed, so it needs 4657 * to be disabled. 4658 */ 4659 if (failpos >= 0) { 4660 nmp = VFSTONFS(dvp[failpos]->v_mount); 4661 NFSLOCKMNT(nmp); 4662 if ((nmp->nm_privflag & (NFSMNTP_FORCEDISM | 4663 NFSMNTP_CANCELRPCS)) == 0) { 4664 nmp->nm_privflag |= NFSMNTP_CANCELRPCS; 4665 NFSUNLOCKMNT(nmp); 4666 ds = nfsrv_deldsnmp(PNFSDOP_DELDSSERVER, nmp, p); 4667 NFSD_DEBUG(4, "dsremovefail fail=%d ds=%p\n", failpos, 4668 ds); 4669 if (ds != NULL) 4670 nfsrv_killrpcs(nmp); 4671 NFSLOCKMNT(nmp); 4672 nmp->nm_privflag &= ~NFSMNTP_CANCELRPCS; 4673 wakeup(nmp); 4674 } 4675 NFSUNLOCKMNT(nmp); 4676 } 4677 4678 /* Get rid all layouts for the file. */ 4679 nfsrv_freefilelayouts(fhp); 4680 4681 NFSFREECRED(tcred); 4682 free(dsrm, M_TEMP); 4683 } 4684 4685 /* 4686 * Generate a file name based on the file handle and put it in *bufp. 4687 * Return the number of bytes generated. 4688 */ 4689 static int 4690 nfsrv_putfhname(fhandle_t *fhp, char *bufp) 4691 { 4692 int i; 4693 uint8_t *cp; 4694 const uint8_t *hexdigits = "0123456789abcdef"; 4695 4696 cp = (uint8_t *)fhp; 4697 for (i = 0; i < sizeof(*fhp); i++) { 4698 bufp[2 * i] = hexdigits[(*cp >> 4) & 0xf]; 4699 bufp[2 * i + 1] = hexdigits[*cp++ & 0xf]; 4700 } 4701 bufp[2 * i] = '\0'; 4702 return (2 * i); 4703 } 4704 4705 /* 4706 * Update the Metadata file's attributes from the DS file when a Read/Write 4707 * layout is returned. 4708 * Basically just call nfsrv_proxyds() with procedure == NFSPROC_LAYOUTRETURN 4709 * so that it does a nfsrv_getattrdsrpc() and nfsrv_setextattr() on the DS file. 4710 */ 4711 int 4712 nfsrv_updatemdsattr(struct vnode *vp, struct nfsvattr *nap, NFSPROC_T *p) 4713 { 4714 struct ucred *tcred; 4715 int error; 4716 4717 /* Do this as root so that it won't fail with EACCES. */ 4718 tcred = newnfs_getcred(); 4719 error = nfsrv_proxyds(vp, 0, 0, tcred, p, NFSPROC_LAYOUTRETURN, 4720 NULL, NULL, NULL, nap, NULL, NULL, 0, NULL); 4721 NFSFREECRED(tcred); 4722 return (error); 4723 } 4724 4725 /* 4726 * Set the NFSv4 ACL on the DS file to the same ACL as the MDS file. 4727 */ 4728 static int 4729 nfsrv_dssetacl(struct vnode *vp, struct acl *aclp, struct ucred *cred, 4730 NFSPROC_T *p) 4731 { 4732 int error; 4733 4734 error = nfsrv_proxyds(vp, 0, 0, cred, p, NFSPROC_SETACL, 4735 NULL, NULL, NULL, NULL, aclp, NULL, 0, NULL); 4736 return (error); 4737 } 4738 4739 static int 4740 nfsrv_proxyds(struct vnode *vp, off_t off, int cnt, struct ucred *cred, 4741 struct thread *p, int ioproc, struct mbuf **mpp, char *cp, 4742 struct mbuf **mpp2, struct nfsvattr *nap, struct acl *aclp, 4743 off_t *offp, int content, bool *eofp) 4744 { 4745 struct nfsmount *nmp[NFSDEV_MAXMIRRORS], *failnmp; 4746 fhandle_t fh[NFSDEV_MAXMIRRORS]; 4747 struct vnode *dvp[NFSDEV_MAXMIRRORS]; 4748 struct nfsdevice *ds; 4749 struct pnfsdsattr dsattr; 4750 struct opnfsdsattr odsattr; 4751 char *buf; 4752 int buflen, error, failpos, i, mirrorcnt, origmircnt, trycnt; 4753 4754 NFSD_DEBUG(4, "in nfsrv_proxyds\n"); 4755 /* 4756 * If not a regular file, not exported or not a pNFS server, 4757 * just return ENOENT. 4758 */ 4759 if (vp->v_type != VREG || (vp->v_mount->mnt_flag & MNT_EXPORTED) == 0 || 4760 nfsrv_devidcnt == 0) 4761 return (ENOENT); 4762 4763 buflen = 1024; 4764 buf = malloc(buflen, M_TEMP, M_WAITOK); 4765 error = 0; 4766 4767 /* 4768 * For Getattr, get the Change attribute (va_filerev) and size (va_size) 4769 * from the MetaData file's extended attribute. 4770 */ 4771 if (ioproc == NFSPROC_GETATTR) { 4772 error = vn_extattr_get(vp, IO_NODELOCKED, 4773 EXTATTR_NAMESPACE_SYSTEM, "pnfsd.dsattr", &buflen, buf, 4774 p); 4775 if (error == 0) { 4776 if (buflen == sizeof(odsattr)) { 4777 NFSBCOPY(buf, &odsattr, buflen); 4778 nap->na_filerev = odsattr.dsa_filerev; 4779 nap->na_size = odsattr.dsa_size; 4780 nap->na_atime = odsattr.dsa_atime; 4781 nap->na_mtime = odsattr.dsa_mtime; 4782 /* 4783 * Fake na_bytes by rounding up na_size. 4784 * Since we don't know the block size, just 4785 * use BLKDEV_IOSIZE. 4786 */ 4787 nap->na_bytes = (odsattr.dsa_size + 4788 BLKDEV_IOSIZE - 1) & ~(BLKDEV_IOSIZE - 1); 4789 } else if (buflen == sizeof(dsattr)) { 4790 NFSBCOPY(buf, &dsattr, buflen); 4791 nap->na_filerev = dsattr.dsa_filerev; 4792 nap->na_size = dsattr.dsa_size; 4793 nap->na_atime = dsattr.dsa_atime; 4794 nap->na_mtime = dsattr.dsa_mtime; 4795 nap->na_bytes = dsattr.dsa_bytes; 4796 } else 4797 error = ENXIO; 4798 } 4799 if (error == 0) { 4800 /* 4801 * If nfsrv_pnfsgetdsattr is 0 or nfsrv_checkdsattr() 4802 * returns 0, just return now. nfsrv_checkdsattr() 4803 * returns 0 if there is no Read/Write layout 4804 * plus either an Open/Write_access or Write 4805 * delegation issued to a client for the file. 4806 */ 4807 if (nfsrv_pnfsgetdsattr == 0 || 4808 nfsrv_checkdsattr(vp, p) == 0) { 4809 free(buf, M_TEMP); 4810 return (error); 4811 } 4812 } 4813 4814 /* 4815 * Clear ENOATTR so the code below will attempt to do a 4816 * nfsrv_getattrdsrpc() to get the attributes and (re)create 4817 * the extended attribute. 4818 */ 4819 if (error == ENOATTR) 4820 error = 0; 4821 } 4822 4823 origmircnt = -1; 4824 trycnt = 0; 4825 tryagain: 4826 if (error == 0) { 4827 buflen = 1024; 4828 if (ioproc == NFSPROC_READDS && NFSVOPISLOCKED(vp) == 4829 LK_EXCLUSIVE) 4830 printf("nfsrv_proxyds: Readds vp exclusively locked\n"); 4831 error = nfsrv_dsgetsockmnt(vp, LK_SHARED, buf, &buflen, 4832 &mirrorcnt, p, dvp, fh, NULL, NULL, NULL, NULL, NULL, 4833 NULL, NULL); 4834 if (error == 0) { 4835 for (i = 0; i < mirrorcnt; i++) 4836 nmp[i] = VFSTONFS(dvp[i]->v_mount); 4837 } else 4838 printf("pNFS: proxy getextattr sockaddr=%d\n", error); 4839 } else 4840 printf("pNFS: nfsrv_dsgetsockmnt=%d\n", error); 4841 if (error == 0) { 4842 failpos = -1; 4843 if (origmircnt == -1) 4844 origmircnt = mirrorcnt; 4845 /* 4846 * If failpos is set to a mirror#, then that mirror has 4847 * failed and will be disabled. For Read, Getattr and Seek, the 4848 * function only tries one mirror, so if that mirror has 4849 * failed, it will need to be retried. As such, increment 4850 * tryitagain for these cases. 4851 * For Write, Setattr and Setacl, the function tries all 4852 * mirrors and will not return an error for the case where 4853 * one mirror has failed. For these cases, the functioning 4854 * mirror(s) will have been modified, so a retry isn't 4855 * necessary. These functions will set failpos for the 4856 * failed mirror#. 4857 */ 4858 if (ioproc == NFSPROC_READDS) { 4859 error = nfsrv_readdsrpc(fh, off, cnt, cred, p, nmp[0], 4860 mpp, mpp2); 4861 if (nfsds_failerr(error) && mirrorcnt > 1) { 4862 /* 4863 * Setting failpos will cause the mirror 4864 * to be disabled and then a retry of this 4865 * read is required. 4866 */ 4867 failpos = 0; 4868 error = 0; 4869 trycnt++; 4870 } 4871 } else if (ioproc == NFSPROC_WRITEDS) 4872 error = nfsrv_writedsrpc(fh, off, cnt, cred, p, vp, 4873 &nmp[0], mirrorcnt, mpp, cp, &failpos); 4874 else if (ioproc == NFSPROC_SETATTR) 4875 error = nfsrv_setattrdsrpc(fh, cred, p, vp, &nmp[0], 4876 mirrorcnt, nap, &failpos); 4877 else if (ioproc == NFSPROC_SETACL) 4878 error = nfsrv_setacldsrpc(fh, cred, p, vp, &nmp[0], 4879 mirrorcnt, aclp, &failpos); 4880 else if (ioproc == NFSPROC_SEEKDS) { 4881 error = nfsrv_seekdsrpc(fh, offp, content, eofp, cred, 4882 p, nmp[0]); 4883 if (nfsds_failerr(error) && mirrorcnt > 1) { 4884 /* 4885 * Setting failpos will cause the mirror 4886 * to be disabled and then a retry of this 4887 * read is required. 4888 */ 4889 failpos = 0; 4890 error = 0; 4891 trycnt++; 4892 } 4893 } else if (ioproc == NFSPROC_ALLOCATE) 4894 error = nfsrv_allocatedsrpc(fh, off, *offp, cred, p, vp, 4895 &nmp[0], mirrorcnt, &failpos); 4896 else if (ioproc == NFSPROC_DEALLOCATE) 4897 error = nfsrv_deallocatedsrpc(fh, off, *offp, cred, p, 4898 vp, &nmp[0], mirrorcnt, &failpos); 4899 else { 4900 error = nfsrv_getattrdsrpc(&fh[mirrorcnt - 1], cred, p, 4901 vp, nmp[mirrorcnt - 1], nap); 4902 if (nfsds_failerr(error) && mirrorcnt > 1) { 4903 /* 4904 * Setting failpos will cause the mirror 4905 * to be disabled and then a retry of this 4906 * getattr is required. 4907 */ 4908 failpos = mirrorcnt - 1; 4909 error = 0; 4910 trycnt++; 4911 } 4912 } 4913 ds = NULL; 4914 if (failpos >= 0) { 4915 failnmp = nmp[failpos]; 4916 NFSLOCKMNT(failnmp); 4917 if ((failnmp->nm_privflag & (NFSMNTP_FORCEDISM | 4918 NFSMNTP_CANCELRPCS)) == 0) { 4919 failnmp->nm_privflag |= NFSMNTP_CANCELRPCS; 4920 NFSUNLOCKMNT(failnmp); 4921 ds = nfsrv_deldsnmp(PNFSDOP_DELDSSERVER, 4922 failnmp, p); 4923 NFSD_DEBUG(4, "dsldsnmp fail=%d ds=%p\n", 4924 failpos, ds); 4925 if (ds != NULL) 4926 nfsrv_killrpcs(failnmp); 4927 NFSLOCKMNT(failnmp); 4928 failnmp->nm_privflag &= ~NFSMNTP_CANCELRPCS; 4929 wakeup(failnmp); 4930 } 4931 NFSUNLOCKMNT(failnmp); 4932 } 4933 for (i = 0; i < mirrorcnt; i++) 4934 NFSVOPUNLOCK(dvp[i]); 4935 NFSD_DEBUG(4, "nfsrv_proxyds: aft RPC=%d trya=%d\n", error, 4936 trycnt); 4937 /* Try the Read/Getattr again if a mirror was deleted. */ 4938 if (ds != NULL && trycnt > 0 && trycnt < origmircnt) 4939 goto tryagain; 4940 } else { 4941 /* Return ENOENT for any Extended Attribute error. */ 4942 error = ENOENT; 4943 } 4944 free(buf, M_TEMP); 4945 NFSD_DEBUG(4, "nfsrv_proxyds: error=%d\n", error); 4946 return (error); 4947 } 4948 4949 /* 4950 * Get the DS mount point, fh and directory from the "pnfsd.dsfile" extended 4951 * attribute. 4952 * newnmpp - If it points to a non-NULL nmp, that is the destination and needs 4953 * to be checked. If it points to a NULL nmp, then it returns 4954 * a suitable destination. 4955 * curnmp - If non-NULL, it is the source mount for the copy. 4956 */ 4957 int 4958 nfsrv_dsgetsockmnt(struct vnode *vp, int lktype, char *buf, int *buflenp, 4959 int *mirrorcntp, NFSPROC_T *p, struct vnode **dvpp, fhandle_t *fhp, 4960 char *devid, char *fnamep, struct vnode **nvpp, struct nfsmount **newnmpp, 4961 struct nfsmount *curnmp, int *ippos, int *dsdirp) 4962 { 4963 struct vnode *dvp, *nvp = NULL, **tdvpp; 4964 struct mount *mp; 4965 struct nfsmount *nmp, *newnmp; 4966 struct sockaddr *sad; 4967 struct sockaddr_in *sin; 4968 struct nfsdevice *ds, *tds, *fndds; 4969 struct pnfsdsfile *pf; 4970 uint32_t dsdir; 4971 int error, fhiszero, fnd, gotone, i, mirrorcnt; 4972 4973 ASSERT_VOP_LOCKED(vp, "nfsrv_dsgetsockmnt vp"); 4974 *mirrorcntp = 1; 4975 tdvpp = dvpp; 4976 if (nvpp != NULL) 4977 *nvpp = NULL; 4978 if (dvpp != NULL) 4979 *dvpp = NULL; 4980 if (ippos != NULL) 4981 *ippos = -1; 4982 if (newnmpp != NULL) 4983 newnmp = *newnmpp; 4984 else 4985 newnmp = NULL; 4986 mp = vp->v_mount; 4987 error = vn_extattr_get(vp, IO_NODELOCKED, EXTATTR_NAMESPACE_SYSTEM, 4988 "pnfsd.dsfile", buflenp, buf, p); 4989 mirrorcnt = *buflenp / sizeof(*pf); 4990 if (error == 0 && (mirrorcnt < 1 || mirrorcnt > NFSDEV_MAXMIRRORS || 4991 *buflenp != sizeof(*pf) * mirrorcnt)) 4992 error = ENOATTR; 4993 4994 pf = (struct pnfsdsfile *)buf; 4995 /* If curnmp != NULL, check for a match in the mirror list. */ 4996 if (curnmp != NULL && error == 0) { 4997 fnd = 0; 4998 for (i = 0; i < mirrorcnt; i++, pf++) { 4999 sad = (struct sockaddr *)&pf->dsf_sin; 5000 if (nfsaddr2_match(sad, curnmp->nm_nam)) { 5001 if (ippos != NULL) 5002 *ippos = i; 5003 fnd = 1; 5004 break; 5005 } 5006 } 5007 if (fnd == 0) 5008 error = ENXIO; 5009 } 5010 5011 gotone = 0; 5012 pf = (struct pnfsdsfile *)buf; 5013 NFSD_DEBUG(4, "nfsrv_dsgetsockmnt: mirrorcnt=%d err=%d\n", mirrorcnt, 5014 error); 5015 for (i = 0; i < mirrorcnt && error == 0; i++, pf++) { 5016 fhiszero = 0; 5017 sad = (struct sockaddr *)&pf->dsf_sin; 5018 sin = &pf->dsf_sin; 5019 dsdir = pf->dsf_dir; 5020 if (dsdir >= nfsrv_dsdirsize) { 5021 printf("nfsrv_dsgetsockmnt: dsdir=%d\n", dsdir); 5022 error = ENOATTR; 5023 } else if (nvpp != NULL && newnmp != NULL && 5024 nfsaddr2_match(sad, newnmp->nm_nam)) 5025 error = EEXIST; 5026 if (error == 0) { 5027 if (ippos != NULL && curnmp == NULL && 5028 sad->sa_family == AF_INET && 5029 sin->sin_addr.s_addr == 0) 5030 *ippos = i; 5031 if (NFSBCMP(&zerofh, &pf->dsf_fh, sizeof(zerofh)) == 0) 5032 fhiszero = 1; 5033 /* Use the socket address to find the mount point. */ 5034 fndds = NULL; 5035 NFSDDSLOCK(); 5036 /* Find a match for the IP address. */ 5037 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 5038 if (ds->nfsdev_nmp != NULL) { 5039 dvp = ds->nfsdev_dvp; 5040 nmp = VFSTONFS(dvp->v_mount); 5041 if (nmp != ds->nfsdev_nmp) 5042 printf("different2 nmp %p %p\n", 5043 nmp, ds->nfsdev_nmp); 5044 if (nfsaddr2_match(sad, nmp->nm_nam)) { 5045 fndds = ds; 5046 break; 5047 } 5048 } 5049 } 5050 if (fndds != NULL && newnmpp != NULL && 5051 newnmp == NULL) { 5052 /* Search for a place to make a mirror copy. */ 5053 TAILQ_FOREACH(tds, &nfsrv_devidhead, 5054 nfsdev_list) { 5055 if (tds->nfsdev_nmp != NULL && 5056 fndds != tds && 5057 ((tds->nfsdev_mdsisset == 0 && 5058 fndds->nfsdev_mdsisset == 0) || 5059 (tds->nfsdev_mdsisset != 0 && 5060 fndds->nfsdev_mdsisset != 0 && 5061 fsidcmp(&tds->nfsdev_mdsfsid, 5062 &mp->mnt_stat.f_fsid) == 0))) { 5063 *newnmpp = tds->nfsdev_nmp; 5064 break; 5065 } 5066 } 5067 if (tds != NULL) { 5068 /* 5069 * Move this entry to the end of the 5070 * list, so it won't be selected as 5071 * easily the next time. 5072 */ 5073 TAILQ_REMOVE(&nfsrv_devidhead, tds, 5074 nfsdev_list); 5075 TAILQ_INSERT_TAIL(&nfsrv_devidhead, tds, 5076 nfsdev_list); 5077 } 5078 } 5079 NFSDDSUNLOCK(); 5080 if (fndds != NULL) { 5081 dvp = fndds->nfsdev_dsdir[dsdir]; 5082 if (lktype != 0 || fhiszero != 0 || 5083 (nvpp != NULL && *nvpp == NULL)) { 5084 if (fhiszero != 0) 5085 error = vn_lock(dvp, 5086 LK_EXCLUSIVE); 5087 else if (lktype != 0) 5088 error = vn_lock(dvp, lktype); 5089 else 5090 error = vn_lock(dvp, LK_SHARED); 5091 /* 5092 * If the file handle is all 0's, try to 5093 * do a Lookup against the DS to acquire 5094 * it. 5095 * If dvpp == NULL or the Lookup fails, 5096 * unlock dvp after the call. 5097 */ 5098 if (error == 0 && (fhiszero != 0 || 5099 (nvpp != NULL && *nvpp == NULL))) { 5100 error = nfsrv_pnfslookupds(vp, 5101 dvp, pf, &nvp, p); 5102 if (error == 0) { 5103 if (fhiszero != 0) 5104 nfsrv_pnfssetfh( 5105 vp, pf, 5106 devid, 5107 fnamep, 5108 nvp, p); 5109 if (nvpp != NULL && 5110 *nvpp == NULL) { 5111 *nvpp = nvp; 5112 *dsdirp = dsdir; 5113 } else 5114 vput(nvp); 5115 } 5116 if (error != 0 || lktype == 0) 5117 NFSVOPUNLOCK(dvp); 5118 } 5119 } 5120 if (error == 0) { 5121 gotone++; 5122 NFSD_DEBUG(4, "gotone=%d\n", gotone); 5123 if (devid != NULL) { 5124 NFSBCOPY(fndds->nfsdev_deviceid, 5125 devid, NFSX_V4DEVICEID); 5126 devid += NFSX_V4DEVICEID; 5127 } 5128 if (dvpp != NULL) 5129 *tdvpp++ = dvp; 5130 if (fhp != NULL) 5131 NFSBCOPY(&pf->dsf_fh, fhp++, 5132 NFSX_MYFH); 5133 if (fnamep != NULL && gotone == 1) 5134 strlcpy(fnamep, 5135 pf->dsf_filename, 5136 sizeof(pf->dsf_filename)); 5137 } else 5138 NFSD_DEBUG(4, "nfsrv_dsgetsockmnt " 5139 "err=%d\n", error); 5140 } 5141 } 5142 } 5143 if (error == 0 && gotone == 0) 5144 error = ENOENT; 5145 5146 NFSD_DEBUG(4, "eo nfsrv_dsgetsockmnt: gotone=%d err=%d\n", gotone, 5147 error); 5148 if (error == 0) 5149 *mirrorcntp = gotone; 5150 else { 5151 if (gotone > 0 && dvpp != NULL) { 5152 /* 5153 * If the error didn't occur on the first one and 5154 * dvpp != NULL, the one(s) prior to the failure will 5155 * have locked dvp's that need to be unlocked. 5156 */ 5157 for (i = 0; i < gotone; i++) { 5158 NFSVOPUNLOCK(*dvpp); 5159 *dvpp++ = NULL; 5160 } 5161 } 5162 /* 5163 * If it found the vnode to be copied from before a failure, 5164 * it needs to be vput()'d. 5165 */ 5166 if (nvpp != NULL && *nvpp != NULL) { 5167 vput(*nvpp); 5168 *nvpp = NULL; 5169 } 5170 } 5171 return (error); 5172 } 5173 5174 /* 5175 * Set the extended attribute for the Change attribute. 5176 */ 5177 static int 5178 nfsrv_setextattr(struct vnode *vp, struct nfsvattr *nap, NFSPROC_T *p) 5179 { 5180 struct pnfsdsattr dsattr; 5181 int error; 5182 5183 ASSERT_VOP_ELOCKED(vp, "nfsrv_setextattr vp"); 5184 dsattr.dsa_filerev = nap->na_filerev; 5185 dsattr.dsa_size = nap->na_size; 5186 dsattr.dsa_atime = nap->na_atime; 5187 dsattr.dsa_mtime = nap->na_mtime; 5188 dsattr.dsa_bytes = nap->na_bytes; 5189 error = vn_extattr_set(vp, IO_NODELOCKED, EXTATTR_NAMESPACE_SYSTEM, 5190 "pnfsd.dsattr", sizeof(dsattr), (char *)&dsattr, p); 5191 if (error != 0) 5192 printf("pNFS: setextattr=%d\n", error); 5193 return (error); 5194 } 5195 5196 static int 5197 nfsrv_readdsrpc(fhandle_t *fhp, off_t off, int len, struct ucred *cred, 5198 NFSPROC_T *p, struct nfsmount *nmp, struct mbuf **mpp, struct mbuf **mpendp) 5199 { 5200 uint32_t *tl; 5201 struct nfsrv_descript *nd; 5202 nfsv4stateid_t st; 5203 struct mbuf *m, *m2; 5204 int error = 0, retlen, tlen, trimlen; 5205 5206 NFSD_DEBUG(4, "in nfsrv_readdsrpc\n"); 5207 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 5208 *mpp = NULL; 5209 /* 5210 * Use a stateid where other is an alternating 01010 pattern and 5211 * seqid is 0xffffffff. This value is not defined as special by 5212 * the RFC and is used by the FreeBSD NFS server to indicate an 5213 * MDS->DS proxy operation. 5214 */ 5215 st.other[0] = 0x55555555; 5216 st.other[1] = 0x55555555; 5217 st.other[2] = 0x55555555; 5218 st.seqid = 0xffffffff; 5219 nfscl_reqstart(nd, NFSPROC_READDS, nmp, (u_int8_t *)fhp, sizeof(*fhp), 5220 NULL, NULL, 0, 0, cred); 5221 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 5222 NFSM_BUILD(tl, uint32_t *, NFSX_UNSIGNED * 3); 5223 txdr_hyper(off, tl); 5224 *(tl + 2) = txdr_unsigned(len); 5225 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred, 5226 NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 5227 if (error != 0) { 5228 free(nd, M_TEMP); 5229 return (error); 5230 } 5231 if (nd->nd_repstat == 0) { 5232 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 5233 NFSM_STRSIZ(retlen, len); 5234 if (retlen > 0) { 5235 /* Trim off the pre-data XDR from the mbuf chain. */ 5236 m = nd->nd_mrep; 5237 while (m != NULL && m != nd->nd_md) { 5238 if (m->m_next == nd->nd_md) { 5239 m->m_next = NULL; 5240 m_freem(nd->nd_mrep); 5241 nd->nd_mrep = m = nd->nd_md; 5242 } else 5243 m = m->m_next; 5244 } 5245 if (m == NULL) { 5246 printf("nfsrv_readdsrpc: busted mbuf list\n"); 5247 error = ENOENT; 5248 goto nfsmout; 5249 } 5250 5251 /* 5252 * Now, adjust first mbuf so that any XDR before the 5253 * read data is skipped over. 5254 */ 5255 trimlen = nd->nd_dpos - mtod(m, char *); 5256 if (trimlen > 0) { 5257 m->m_len -= trimlen; 5258 NFSM_DATAP(m, trimlen); 5259 } 5260 5261 /* 5262 * Truncate the mbuf chain at retlen bytes of data, 5263 * plus XDR padding that brings the length up to a 5264 * multiple of 4. 5265 */ 5266 tlen = NFSM_RNDUP(retlen); 5267 do { 5268 if (m->m_len >= tlen) { 5269 m->m_len = tlen; 5270 tlen = 0; 5271 m2 = m->m_next; 5272 m->m_next = NULL; 5273 m_freem(m2); 5274 break; 5275 } 5276 tlen -= m->m_len; 5277 m = m->m_next; 5278 } while (m != NULL); 5279 if (tlen > 0) { 5280 printf("nfsrv_readdsrpc: busted mbuf list\n"); 5281 error = ENOENT; 5282 goto nfsmout; 5283 } 5284 *mpp = nd->nd_mrep; 5285 *mpendp = m; 5286 nd->nd_mrep = NULL; 5287 } 5288 } else 5289 error = nd->nd_repstat; 5290 nfsmout: 5291 /* If nd->nd_mrep is already NULL, this is a no-op. */ 5292 m_freem(nd->nd_mrep); 5293 free(nd, M_TEMP); 5294 NFSD_DEBUG(4, "nfsrv_readdsrpc error=%d\n", error); 5295 return (error); 5296 } 5297 5298 /* 5299 * Do a write RPC on a DS data file, using this structure for the arguments, 5300 * so that this function can be executed by a separate kernel process. 5301 */ 5302 struct nfsrvwritedsdorpc { 5303 int done; 5304 int inprog; 5305 struct task tsk; 5306 fhandle_t fh; 5307 off_t off; 5308 int len; 5309 struct nfsmount *nmp; 5310 struct ucred *cred; 5311 NFSPROC_T *p; 5312 struct mbuf *m; 5313 int err; 5314 }; 5315 5316 static int 5317 nfsrv_writedsdorpc(struct nfsmount *nmp, fhandle_t *fhp, off_t off, int len, 5318 struct nfsvattr *nap, struct mbuf *m, struct ucred *cred, NFSPROC_T *p) 5319 { 5320 uint32_t *tl; 5321 struct nfsrv_descript *nd; 5322 nfsattrbit_t attrbits; 5323 nfsv4stateid_t st; 5324 int commit, error, retlen; 5325 5326 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 5327 nfscl_reqstart(nd, NFSPROC_WRITE, nmp, (u_int8_t *)fhp, 5328 sizeof(fhandle_t), NULL, NULL, 0, 0, cred); 5329 5330 /* 5331 * Use a stateid where other is an alternating 01010 pattern and 5332 * seqid is 0xffffffff. This value is not defined as special by 5333 * the RFC and is used by the FreeBSD NFS server to indicate an 5334 * MDS->DS proxy operation. 5335 */ 5336 st.other[0] = 0x55555555; 5337 st.other[1] = 0x55555555; 5338 st.other[2] = 0x55555555; 5339 st.seqid = 0xffffffff; 5340 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 5341 NFSM_BUILD(tl, u_int32_t *, NFSX_HYPER + 2 * NFSX_UNSIGNED); 5342 txdr_hyper(off, tl); 5343 tl += 2; 5344 /* 5345 * Do all writes FileSync, since the server doesn't hold onto dirty 5346 * buffers. Since clients should be accessing the DS servers directly 5347 * using the pNFS layouts, this just needs to work correctly as a 5348 * fallback. 5349 */ 5350 *tl++ = txdr_unsigned(NFSWRITE_FILESYNC); 5351 *tl = txdr_unsigned(len); 5352 NFSD_DEBUG(4, "nfsrv_writedsdorpc: len=%d\n", len); 5353 5354 /* Put data in mbuf chain. */ 5355 nd->nd_mb->m_next = m; 5356 5357 /* Set nd_mb and nd_bpos to end of data. */ 5358 while (m->m_next != NULL) 5359 m = m->m_next; 5360 nd->nd_mb = m; 5361 nfsm_set(nd, m->m_len); 5362 NFSD_DEBUG(4, "nfsrv_writedsdorpc: lastmb len=%d\n", m->m_len); 5363 5364 /* Do a Getattr for the attributes that change upon writing. */ 5365 NFSZERO_ATTRBIT(&attrbits); 5366 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SIZE); 5367 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_CHANGE); 5368 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEACCESS); 5369 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEMODIFY); 5370 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SPACEUSED); 5371 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 5372 *tl = txdr_unsigned(NFSV4OP_GETATTR); 5373 (void) nfsrv_putattrbit(nd, &attrbits); 5374 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, 5375 cred, NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 5376 if (error != 0) { 5377 free(nd, M_TEMP); 5378 return (error); 5379 } 5380 NFSD_DEBUG(4, "nfsrv_writedsdorpc: aft writerpc=%d\n", nd->nd_repstat); 5381 /* Get rid of weak cache consistency data for now. */ 5382 if ((nd->nd_flag & (ND_NOMOREDATA | ND_NFSV4 | ND_V4WCCATTR)) == 5383 (ND_NFSV4 | ND_V4WCCATTR)) { 5384 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, NULL, NULL, 5385 NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 5386 NFSD_DEBUG(4, "nfsrv_writedsdorpc: wcc attr=%d\n", error); 5387 if (error != 0) 5388 goto nfsmout; 5389 /* 5390 * Get rid of Op# and status for next op. 5391 */ 5392 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 5393 if (*++tl != 0) 5394 nd->nd_flag |= ND_NOMOREDATA; 5395 } 5396 if (nd->nd_repstat == 0) { 5397 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED + NFSX_VERF); 5398 retlen = fxdr_unsigned(int, *tl++); 5399 commit = fxdr_unsigned(int, *tl); 5400 if (commit != NFSWRITE_FILESYNC) 5401 error = NFSERR_IO; 5402 NFSD_DEBUG(4, "nfsrv_writedsdorpc:retlen=%d commit=%d err=%d\n", 5403 retlen, commit, error); 5404 } else 5405 error = nd->nd_repstat; 5406 /* We have no use for the Write Verifier since we use FileSync. */ 5407 5408 /* 5409 * Get the Change, Size, Access Time and Modify Time attributes and set 5410 * on the Metadata file, so its attributes will be what the file's 5411 * would be if it had been written. 5412 */ 5413 if (error == 0) { 5414 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 5415 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, NULL, NULL, 5416 NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 5417 } 5418 NFSD_DEBUG(4, "nfsrv_writedsdorpc: aft loadattr=%d\n", error); 5419 nfsmout: 5420 m_freem(nd->nd_mrep); 5421 free(nd, M_TEMP); 5422 NFSD_DEBUG(4, "nfsrv_writedsdorpc error=%d\n", error); 5423 return (error); 5424 } 5425 5426 /* 5427 * Start up the thread that will execute nfsrv_writedsdorpc(). 5428 */ 5429 static void 5430 start_writedsdorpc(void *arg, int pending) 5431 { 5432 struct nfsrvwritedsdorpc *drpc; 5433 5434 drpc = (struct nfsrvwritedsdorpc *)arg; 5435 drpc->err = nfsrv_writedsdorpc(drpc->nmp, &drpc->fh, drpc->off, 5436 drpc->len, NULL, drpc->m, drpc->cred, drpc->p); 5437 drpc->done = 1; 5438 NFSD_DEBUG(4, "start_writedsdorpc: err=%d\n", drpc->err); 5439 } 5440 5441 static int 5442 nfsrv_writedsrpc(fhandle_t *fhp, off_t off, int len, struct ucred *cred, 5443 NFSPROC_T *p, struct vnode *vp, struct nfsmount **nmpp, int mirrorcnt, 5444 struct mbuf **mpp, char *cp, int *failposp) 5445 { 5446 struct nfsrvwritedsdorpc *drpc, *tdrpc = NULL; 5447 struct nfsvattr na; 5448 struct mbuf *m; 5449 int error, i, offs, ret, timo; 5450 5451 NFSD_DEBUG(4, "in nfsrv_writedsrpc\n"); 5452 KASSERT(*mpp != NULL, ("nfsrv_writedsrpc: NULL mbuf chain")); 5453 drpc = NULL; 5454 if (mirrorcnt > 1) 5455 tdrpc = drpc = malloc(sizeof(*drpc) * (mirrorcnt - 1), M_TEMP, 5456 M_WAITOK); 5457 5458 /* Calculate offset in mbuf chain that data starts. */ 5459 offs = cp - mtod(*mpp, char *); 5460 NFSD_DEBUG(4, "nfsrv_writedsrpc: mcopy offs=%d len=%d\n", offs, len); 5461 5462 /* 5463 * Do the write RPC for every DS, using a separate kernel process 5464 * for every DS except the last one. 5465 */ 5466 error = 0; 5467 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5468 tdrpc->done = 0; 5469 NFSBCOPY(fhp, &tdrpc->fh, sizeof(*fhp)); 5470 tdrpc->off = off; 5471 tdrpc->len = len; 5472 tdrpc->nmp = *nmpp; 5473 tdrpc->cred = cred; 5474 tdrpc->p = p; 5475 tdrpc->inprog = 0; 5476 tdrpc->err = 0; 5477 tdrpc->m = m_copym(*mpp, offs, NFSM_RNDUP(len), M_WAITOK); 5478 ret = EIO; 5479 if (nfs_pnfsiothreads != 0) { 5480 ret = nfs_pnfsio(start_writedsdorpc, tdrpc); 5481 NFSD_DEBUG(4, "nfsrv_writedsrpc: nfs_pnfsio=%d\n", 5482 ret); 5483 } 5484 if (ret != 0) { 5485 ret = nfsrv_writedsdorpc(*nmpp, fhp, off, len, NULL, 5486 tdrpc->m, cred, p); 5487 if (nfsds_failerr(ret) && *failposp == -1) 5488 *failposp = i; 5489 else if (error == 0 && ret != 0) 5490 error = ret; 5491 } 5492 nmpp++; 5493 fhp++; 5494 } 5495 m = m_copym(*mpp, offs, NFSM_RNDUP(len), M_WAITOK); 5496 ret = nfsrv_writedsdorpc(*nmpp, fhp, off, len, &na, m, cred, p); 5497 if (nfsds_failerr(ret) && *failposp == -1 && mirrorcnt > 1) 5498 *failposp = mirrorcnt - 1; 5499 else if (error == 0 && ret != 0) 5500 error = ret; 5501 if (error == 0) 5502 error = nfsrv_setextattr(vp, &na, p); 5503 NFSD_DEBUG(4, "nfsrv_writedsrpc: aft setextat=%d\n", error); 5504 tdrpc = drpc; 5505 timo = hz / 50; /* Wait for 20msec. */ 5506 if (timo < 1) 5507 timo = 1; 5508 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5509 /* Wait for RPCs on separate threads to complete. */ 5510 while (tdrpc->inprog != 0 && tdrpc->done == 0) 5511 tsleep(&tdrpc->tsk, PVFS, "srvwrds", timo); 5512 if (nfsds_failerr(tdrpc->err) && *failposp == -1) 5513 *failposp = i; 5514 else if (error == 0 && tdrpc->err != 0) 5515 error = tdrpc->err; 5516 } 5517 free(drpc, M_TEMP); 5518 return (error); 5519 } 5520 5521 /* 5522 * Do a allocate RPC on a DS data file, using this structure for the arguments, 5523 * so that this function can be executed by a separate kernel process. 5524 */ 5525 struct nfsrvallocatedsdorpc { 5526 int done; 5527 int inprog; 5528 struct task tsk; 5529 fhandle_t fh; 5530 off_t off; 5531 off_t len; 5532 struct nfsmount *nmp; 5533 struct ucred *cred; 5534 NFSPROC_T *p; 5535 int err; 5536 }; 5537 5538 static int 5539 nfsrv_allocatedsdorpc(struct nfsmount *nmp, fhandle_t *fhp, off_t off, 5540 off_t len, struct nfsvattr *nap, struct ucred *cred, NFSPROC_T *p) 5541 { 5542 uint32_t *tl; 5543 struct nfsrv_descript *nd; 5544 nfsattrbit_t attrbits; 5545 nfsv4stateid_t st; 5546 int error; 5547 5548 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 5549 nfscl_reqstart(nd, NFSPROC_ALLOCATE, nmp, (u_int8_t *)fhp, 5550 sizeof(fhandle_t), NULL, NULL, 0, 0, cred); 5551 5552 /* 5553 * Use a stateid where other is an alternating 01010 pattern and 5554 * seqid is 0xffffffff. This value is not defined as special by 5555 * the RFC and is used by the FreeBSD NFS server to indicate an 5556 * MDS->DS proxy operation. 5557 */ 5558 st.other[0] = 0x55555555; 5559 st.other[1] = 0x55555555; 5560 st.other[2] = 0x55555555; 5561 st.seqid = 0xffffffff; 5562 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 5563 NFSM_BUILD(tl, uint32_t *, 2 * NFSX_HYPER + NFSX_UNSIGNED); 5564 txdr_hyper(off, tl); tl += 2; 5565 txdr_hyper(len, tl); tl += 2; 5566 NFSD_DEBUG(4, "nfsrv_allocatedsdorpc: len=%jd\n", (intmax_t)len); 5567 5568 *tl = txdr_unsigned(NFSV4OP_GETATTR); 5569 NFSGETATTR_ATTRBIT(&attrbits); 5570 nfsrv_putattrbit(nd, &attrbits); 5571 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, 5572 cred, NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 5573 if (error != 0) { 5574 free(nd, M_TEMP); 5575 return (error); 5576 } 5577 NFSD_DEBUG(4, "nfsrv_allocatedsdorpc: aft allocaterpc=%d\n", 5578 nd->nd_repstat); 5579 if (nd->nd_repstat == 0) { 5580 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 5581 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, NULL, NULL, 5582 NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 5583 } else 5584 error = nd->nd_repstat; 5585 NFSD_DEBUG(4, "nfsrv_allocatedsdorpc: aft loadattr=%d\n", error); 5586 nfsmout: 5587 m_freem(nd->nd_mrep); 5588 free(nd, M_TEMP); 5589 NFSD_DEBUG(4, "nfsrv_allocatedsdorpc error=%d\n", error); 5590 return (error); 5591 } 5592 5593 /* 5594 * Start up the thread that will execute nfsrv_allocatedsdorpc(). 5595 */ 5596 static void 5597 start_allocatedsdorpc(void *arg, int pending) 5598 { 5599 struct nfsrvallocatedsdorpc *drpc; 5600 5601 drpc = (struct nfsrvallocatedsdorpc *)arg; 5602 drpc->err = nfsrv_allocatedsdorpc(drpc->nmp, &drpc->fh, drpc->off, 5603 drpc->len, NULL, drpc->cred, drpc->p); 5604 drpc->done = 1; 5605 NFSD_DEBUG(4, "start_allocatedsdorpc: err=%d\n", drpc->err); 5606 } 5607 5608 static int 5609 nfsrv_allocatedsrpc(fhandle_t *fhp, off_t off, off_t len, struct ucred *cred, 5610 NFSPROC_T *p, struct vnode *vp, struct nfsmount **nmpp, int mirrorcnt, 5611 int *failposp) 5612 { 5613 struct nfsrvallocatedsdorpc *drpc, *tdrpc = NULL; 5614 struct nfsvattr na; 5615 int error, i, ret, timo; 5616 5617 NFSD_DEBUG(4, "in nfsrv_allocatedsrpc\n"); 5618 drpc = NULL; 5619 if (mirrorcnt > 1) 5620 tdrpc = drpc = malloc(sizeof(*drpc) * (mirrorcnt - 1), M_TEMP, 5621 M_WAITOK); 5622 5623 /* 5624 * Do the allocate RPC for every DS, using a separate kernel process 5625 * for every DS except the last one. 5626 */ 5627 error = 0; 5628 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5629 tdrpc->done = 0; 5630 NFSBCOPY(fhp, &tdrpc->fh, sizeof(*fhp)); 5631 tdrpc->off = off; 5632 tdrpc->len = len; 5633 tdrpc->nmp = *nmpp; 5634 tdrpc->cred = cred; 5635 tdrpc->p = p; 5636 tdrpc->inprog = 0; 5637 tdrpc->err = 0; 5638 ret = EIO; 5639 if (nfs_pnfsiothreads != 0) { 5640 ret = nfs_pnfsio(start_allocatedsdorpc, tdrpc); 5641 NFSD_DEBUG(4, "nfsrv_allocatedsrpc: nfs_pnfsio=%d\n", 5642 ret); 5643 } 5644 if (ret != 0) { 5645 ret = nfsrv_allocatedsdorpc(*nmpp, fhp, off, len, NULL, 5646 cred, p); 5647 if (nfsds_failerr(ret) && *failposp == -1) 5648 *failposp = i; 5649 else if (error == 0 && ret != 0) 5650 error = ret; 5651 } 5652 nmpp++; 5653 fhp++; 5654 } 5655 ret = nfsrv_allocatedsdorpc(*nmpp, fhp, off, len, &na, cred, p); 5656 if (nfsds_failerr(ret) && *failposp == -1 && mirrorcnt > 1) 5657 *failposp = mirrorcnt - 1; 5658 else if (error == 0 && ret != 0) 5659 error = ret; 5660 if (error == 0) 5661 error = nfsrv_setextattr(vp, &na, p); 5662 NFSD_DEBUG(4, "nfsrv_allocatedsrpc: aft setextat=%d\n", error); 5663 tdrpc = drpc; 5664 timo = hz / 50; /* Wait for 20msec. */ 5665 if (timo < 1) 5666 timo = 1; 5667 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5668 /* Wait for RPCs on separate threads to complete. */ 5669 while (tdrpc->inprog != 0 && tdrpc->done == 0) 5670 tsleep(&tdrpc->tsk, PVFS, "srvalds", timo); 5671 if (nfsds_failerr(tdrpc->err) && *failposp == -1) 5672 *failposp = i; 5673 else if (error == 0 && tdrpc->err != 0) 5674 error = tdrpc->err; 5675 } 5676 free(drpc, M_TEMP); 5677 return (error); 5678 } 5679 5680 /* 5681 * Do a deallocate RPC on a DS data file, using this structure for the 5682 * arguments, so that this function can be executed by a separate kernel 5683 * process. 5684 */ 5685 struct nfsrvdeallocatedsdorpc { 5686 int done; 5687 int inprog; 5688 struct task tsk; 5689 fhandle_t fh; 5690 off_t off; 5691 off_t len; 5692 struct nfsmount *nmp; 5693 struct ucred *cred; 5694 NFSPROC_T *p; 5695 int err; 5696 }; 5697 5698 static int 5699 nfsrv_deallocatedsdorpc(struct nfsmount *nmp, fhandle_t *fhp, off_t off, 5700 off_t len, struct nfsvattr *nap, struct ucred *cred, NFSPROC_T *p) 5701 { 5702 uint32_t *tl; 5703 struct nfsrv_descript *nd; 5704 nfsattrbit_t attrbits; 5705 nfsv4stateid_t st; 5706 int error; 5707 5708 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 5709 nfscl_reqstart(nd, NFSPROC_DEALLOCATE, nmp, (u_int8_t *)fhp, 5710 sizeof(fhandle_t), NULL, NULL, 0, 0, cred); 5711 5712 /* 5713 * Use a stateid where other is an alternating 01010 pattern and 5714 * seqid is 0xffffffff. This value is not defined as special by 5715 * the RFC and is used by the FreeBSD NFS server to indicate an 5716 * MDS->DS proxy operation. 5717 */ 5718 st.other[0] = 0x55555555; 5719 st.other[1] = 0x55555555; 5720 st.other[2] = 0x55555555; 5721 st.seqid = 0xffffffff; 5722 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 5723 NFSM_BUILD(tl, uint32_t *, 2 * NFSX_HYPER + NFSX_UNSIGNED); 5724 txdr_hyper(off, tl); tl += 2; 5725 txdr_hyper(len, tl); tl += 2; 5726 NFSD_DEBUG(4, "nfsrv_deallocatedsdorpc: len=%jd\n", (intmax_t)len); 5727 5728 /* Do a Getattr for the attributes that change upon writing. */ 5729 NFSZERO_ATTRBIT(&attrbits); 5730 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SIZE); 5731 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_CHANGE); 5732 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEACCESS); 5733 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEMODIFY); 5734 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SPACEUSED); 5735 *tl = txdr_unsigned(NFSV4OP_GETATTR); 5736 nfsrv_putattrbit(nd, &attrbits); 5737 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, 5738 cred, NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 5739 if (error != 0) { 5740 free(nd, M_TEMP); 5741 return (error); 5742 } 5743 NFSD_DEBUG(4, "nfsrv_deallocatedsdorpc: aft deallocaterpc=%d\n", 5744 nd->nd_repstat); 5745 /* Get rid of weak cache consistency data for now. */ 5746 if ((nd->nd_flag & (ND_NOMOREDATA | ND_NFSV4 | ND_V4WCCATTR)) == 5747 (ND_NFSV4 | ND_V4WCCATTR)) { 5748 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, NULL, NULL, 5749 NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 5750 NFSD_DEBUG(4, "nfsrv_deallocatedsdorpc: wcc attr=%d\n", error); 5751 if (error != 0) 5752 goto nfsmout; 5753 /* 5754 * Get rid of Op# and status for next op. 5755 */ 5756 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 5757 if (*++tl != 0) 5758 nd->nd_flag |= ND_NOMOREDATA; 5759 } 5760 if (nd->nd_repstat == 0) { 5761 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 5762 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, NULL, NULL, 5763 NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 5764 } else 5765 error = nd->nd_repstat; 5766 NFSD_DEBUG(4, "nfsrv_deallocatedsdorpc: aft loadattr=%d\n", error); 5767 nfsmout: 5768 m_freem(nd->nd_mrep); 5769 free(nd, M_TEMP); 5770 NFSD_DEBUG(4, "nfsrv_deallocatedsdorpc error=%d\n", error); 5771 return (error); 5772 } 5773 5774 /* 5775 * Start up the thread that will execute nfsrv_deallocatedsdorpc(). 5776 */ 5777 static void 5778 start_deallocatedsdorpc(void *arg, int pending) 5779 { 5780 struct nfsrvdeallocatedsdorpc *drpc; 5781 5782 drpc = (struct nfsrvdeallocatedsdorpc *)arg; 5783 drpc->err = nfsrv_deallocatedsdorpc(drpc->nmp, &drpc->fh, drpc->off, 5784 drpc->len, NULL, drpc->cred, drpc->p); 5785 drpc->done = 1; 5786 NFSD_DEBUG(4, "start_deallocatedsdorpc: err=%d\n", drpc->err); 5787 } 5788 5789 static int 5790 nfsrv_deallocatedsrpc(fhandle_t *fhp, off_t off, off_t len, struct ucred *cred, 5791 NFSPROC_T *p, struct vnode *vp, struct nfsmount **nmpp, int mirrorcnt, 5792 int *failposp) 5793 { 5794 struct nfsrvdeallocatedsdorpc *drpc, *tdrpc = NULL; 5795 struct nfsvattr na; 5796 int error, i, ret, timo; 5797 5798 NFSD_DEBUG(4, "in nfsrv_deallocatedsrpc\n"); 5799 drpc = NULL; 5800 if (mirrorcnt > 1) 5801 tdrpc = drpc = malloc(sizeof(*drpc) * (mirrorcnt - 1), M_TEMP, 5802 M_WAITOK); 5803 5804 /* 5805 * Do the deallocate RPC for every DS, using a separate kernel process 5806 * for every DS except the last one. 5807 */ 5808 error = 0; 5809 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5810 tdrpc->done = 0; 5811 NFSBCOPY(fhp, &tdrpc->fh, sizeof(*fhp)); 5812 tdrpc->off = off; 5813 tdrpc->len = len; 5814 tdrpc->nmp = *nmpp; 5815 tdrpc->cred = cred; 5816 tdrpc->p = p; 5817 tdrpc->inprog = 0; 5818 tdrpc->err = 0; 5819 ret = EIO; 5820 if (nfs_pnfsiothreads != 0) { 5821 ret = nfs_pnfsio(start_deallocatedsdorpc, tdrpc); 5822 NFSD_DEBUG(4, "nfsrv_deallocatedsrpc: nfs_pnfsio=%d\n", 5823 ret); 5824 } 5825 if (ret != 0) { 5826 ret = nfsrv_deallocatedsdorpc(*nmpp, fhp, off, len, 5827 NULL, cred, p); 5828 if (nfsds_failerr(ret) && *failposp == -1) 5829 *failposp = i; 5830 else if (error == 0 && ret != 0) 5831 error = ret; 5832 } 5833 nmpp++; 5834 fhp++; 5835 } 5836 ret = nfsrv_deallocatedsdorpc(*nmpp, fhp, off, len, &na, cred, p); 5837 if (nfsds_failerr(ret) && *failposp == -1 && mirrorcnt > 1) 5838 *failposp = mirrorcnt - 1; 5839 else if (error == 0 && ret != 0) 5840 error = ret; 5841 if (error == 0) 5842 error = nfsrv_setextattr(vp, &na, p); 5843 NFSD_DEBUG(4, "nfsrv_deallocatedsrpc: aft setextat=%d\n", error); 5844 tdrpc = drpc; 5845 timo = hz / 50; /* Wait for 20msec. */ 5846 if (timo < 1) 5847 timo = 1; 5848 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5849 /* Wait for RPCs on separate threads to complete. */ 5850 while (tdrpc->inprog != 0 && tdrpc->done == 0) 5851 tsleep(&tdrpc->tsk, PVFS, "srvalds", timo); 5852 if (nfsds_failerr(tdrpc->err) && *failposp == -1) 5853 *failposp = i; 5854 else if (error == 0 && tdrpc->err != 0) 5855 error = tdrpc->err; 5856 } 5857 free(drpc, M_TEMP); 5858 return (error); 5859 } 5860 5861 static int 5862 nfsrv_setattrdsdorpc(fhandle_t *fhp, struct ucred *cred, NFSPROC_T *p, 5863 struct vnode *vp, struct nfsmount *nmp, struct nfsvattr *nap, 5864 struct nfsvattr *dsnap) 5865 { 5866 uint32_t *tl; 5867 struct nfsrv_descript *nd; 5868 nfsv4stateid_t st; 5869 nfsattrbit_t attrbits; 5870 int error; 5871 5872 NFSD_DEBUG(4, "in nfsrv_setattrdsdorpc\n"); 5873 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 5874 /* 5875 * Use a stateid where other is an alternating 01010 pattern and 5876 * seqid is 0xffffffff. This value is not defined as special by 5877 * the RFC and is used by the FreeBSD NFS server to indicate an 5878 * MDS->DS proxy operation. 5879 */ 5880 st.other[0] = 0x55555555; 5881 st.other[1] = 0x55555555; 5882 st.other[2] = 0x55555555; 5883 st.seqid = 0xffffffff; 5884 nfscl_reqstart(nd, NFSPROC_SETATTR, nmp, (u_int8_t *)fhp, sizeof(*fhp), 5885 NULL, NULL, 0, 0, cred); 5886 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 5887 nfscl_fillsattr(nd, &nap->na_vattr, vp, NFSSATTR_FULL, 0); 5888 5889 /* Do a Getattr for the attributes that change due to writing. */ 5890 NFSZERO_ATTRBIT(&attrbits); 5891 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SIZE); 5892 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_CHANGE); 5893 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEACCESS); 5894 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEMODIFY); 5895 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SPACEUSED); 5896 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 5897 *tl = txdr_unsigned(NFSV4OP_GETATTR); 5898 (void) nfsrv_putattrbit(nd, &attrbits); 5899 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred, 5900 NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 5901 if (error != 0) { 5902 free(nd, M_TEMP); 5903 return (error); 5904 } 5905 NFSD_DEBUG(4, "nfsrv_setattrdsdorpc: aft setattrrpc=%d\n", 5906 nd->nd_repstat); 5907 /* Get rid of weak cache consistency data for now. */ 5908 if ((nd->nd_flag & (ND_NOMOREDATA | ND_NFSV4 | ND_V4WCCATTR)) == 5909 (ND_NFSV4 | ND_V4WCCATTR)) { 5910 error = nfsv4_loadattr(nd, NULL, dsnap, NULL, NULL, 0, NULL, 5911 NULL, NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 5912 NFSD_DEBUG(4, "nfsrv_setattrdsdorpc: wcc attr=%d\n", error); 5913 if (error != 0) 5914 goto nfsmout; 5915 /* 5916 * Get rid of Op# and status for next op. 5917 */ 5918 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 5919 if (*++tl != 0) 5920 nd->nd_flag |= ND_NOMOREDATA; 5921 } 5922 error = nfsrv_getattrbits(nd, &attrbits, NULL, NULL); 5923 if (error != 0) 5924 goto nfsmout; 5925 if (nd->nd_repstat != 0) 5926 error = nd->nd_repstat; 5927 /* 5928 * Get the Change, Size, Access Time and Modify Time attributes and set 5929 * on the Metadata file, so its attributes will be what the file's 5930 * would be if it had been written. 5931 */ 5932 if (error == 0) { 5933 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 5934 error = nfsv4_loadattr(nd, NULL, dsnap, NULL, NULL, 0, NULL, 5935 NULL, NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 5936 } 5937 NFSD_DEBUG(4, "nfsrv_setattrdsdorpc: aft setattr loadattr=%d\n", error); 5938 nfsmout: 5939 m_freem(nd->nd_mrep); 5940 free(nd, M_TEMP); 5941 NFSD_DEBUG(4, "nfsrv_setattrdsdorpc error=%d\n", error); 5942 return (error); 5943 } 5944 5945 struct nfsrvsetattrdsdorpc { 5946 int done; 5947 int inprog; 5948 struct task tsk; 5949 fhandle_t fh; 5950 struct nfsmount *nmp; 5951 struct vnode *vp; 5952 struct ucred *cred; 5953 NFSPROC_T *p; 5954 struct nfsvattr na; 5955 struct nfsvattr dsna; 5956 int err; 5957 }; 5958 5959 /* 5960 * Start up the thread that will execute nfsrv_setattrdsdorpc(). 5961 */ 5962 static void 5963 start_setattrdsdorpc(void *arg, int pending) 5964 { 5965 struct nfsrvsetattrdsdorpc *drpc; 5966 5967 drpc = (struct nfsrvsetattrdsdorpc *)arg; 5968 drpc->err = nfsrv_setattrdsdorpc(&drpc->fh, drpc->cred, drpc->p, 5969 drpc->vp, drpc->nmp, &drpc->na, &drpc->dsna); 5970 drpc->done = 1; 5971 } 5972 5973 static int 5974 nfsrv_setattrdsrpc(fhandle_t *fhp, struct ucred *cred, NFSPROC_T *p, 5975 struct vnode *vp, struct nfsmount **nmpp, int mirrorcnt, 5976 struct nfsvattr *nap, int *failposp) 5977 { 5978 struct nfsrvsetattrdsdorpc *drpc, *tdrpc = NULL; 5979 struct nfsvattr na; 5980 int error, i, ret, timo; 5981 5982 NFSD_DEBUG(4, "in nfsrv_setattrdsrpc\n"); 5983 drpc = NULL; 5984 if (mirrorcnt > 1) 5985 tdrpc = drpc = malloc(sizeof(*drpc) * (mirrorcnt - 1), M_TEMP, 5986 M_WAITOK); 5987 5988 /* 5989 * Do the setattr RPC for every DS, using a separate kernel process 5990 * for every DS except the last one. 5991 */ 5992 error = 0; 5993 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5994 tdrpc->done = 0; 5995 tdrpc->inprog = 0; 5996 NFSBCOPY(fhp, &tdrpc->fh, sizeof(*fhp)); 5997 tdrpc->nmp = *nmpp; 5998 tdrpc->vp = vp; 5999 tdrpc->cred = cred; 6000 tdrpc->p = p; 6001 tdrpc->na = *nap; 6002 tdrpc->err = 0; 6003 ret = EIO; 6004 if (nfs_pnfsiothreads != 0) { 6005 ret = nfs_pnfsio(start_setattrdsdorpc, tdrpc); 6006 NFSD_DEBUG(4, "nfsrv_setattrdsrpc: nfs_pnfsio=%d\n", 6007 ret); 6008 } 6009 if (ret != 0) { 6010 ret = nfsrv_setattrdsdorpc(fhp, cred, p, vp, *nmpp, nap, 6011 &na); 6012 if (nfsds_failerr(ret) && *failposp == -1) 6013 *failposp = i; 6014 else if (error == 0 && ret != 0) 6015 error = ret; 6016 } 6017 nmpp++; 6018 fhp++; 6019 } 6020 ret = nfsrv_setattrdsdorpc(fhp, cred, p, vp, *nmpp, nap, &na); 6021 if (nfsds_failerr(ret) && *failposp == -1 && mirrorcnt > 1) 6022 *failposp = mirrorcnt - 1; 6023 else if (error == 0 && ret != 0) 6024 error = ret; 6025 if (error == 0) 6026 error = nfsrv_setextattr(vp, &na, p); 6027 NFSD_DEBUG(4, "nfsrv_setattrdsrpc: aft setextat=%d\n", error); 6028 tdrpc = drpc; 6029 timo = hz / 50; /* Wait for 20msec. */ 6030 if (timo < 1) 6031 timo = 1; 6032 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 6033 /* Wait for RPCs on separate threads to complete. */ 6034 while (tdrpc->inprog != 0 && tdrpc->done == 0) 6035 tsleep(&tdrpc->tsk, PVFS, "srvsads", timo); 6036 if (nfsds_failerr(tdrpc->err) && *failposp == -1) 6037 *failposp = i; 6038 else if (error == 0 && tdrpc->err != 0) 6039 error = tdrpc->err; 6040 } 6041 free(drpc, M_TEMP); 6042 return (error); 6043 } 6044 6045 /* 6046 * Do a Setattr of an NFSv4 ACL on the DS file. 6047 */ 6048 static int 6049 nfsrv_setacldsdorpc(fhandle_t *fhp, struct ucred *cred, NFSPROC_T *p, 6050 struct vnode *vp, struct nfsmount *nmp, struct acl *aclp) 6051 { 6052 struct nfsrv_descript *nd; 6053 nfsv4stateid_t st; 6054 nfsattrbit_t attrbits; 6055 int error; 6056 6057 NFSD_DEBUG(4, "in nfsrv_setacldsdorpc\n"); 6058 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 6059 /* 6060 * Use a stateid where other is an alternating 01010 pattern and 6061 * seqid is 0xffffffff. This value is not defined as special by 6062 * the RFC and is used by the FreeBSD NFS server to indicate an 6063 * MDS->DS proxy operation. 6064 */ 6065 st.other[0] = 0x55555555; 6066 st.other[1] = 0x55555555; 6067 st.other[2] = 0x55555555; 6068 st.seqid = 0xffffffff; 6069 nfscl_reqstart(nd, NFSPROC_SETACL, nmp, (u_int8_t *)fhp, sizeof(*fhp), 6070 NULL, NULL, 0, 0, cred); 6071 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 6072 NFSZERO_ATTRBIT(&attrbits); 6073 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_ACL); 6074 /* 6075 * The "vp" argument to nfsv4_fillattr() is only used for vnode_type(), 6076 * so passing in the metadata "vp" will be ok, since it is of 6077 * the same type (VREG). 6078 */ 6079 nfsv4_fillattr(nd, NULL, vp, aclp, NULL, NULL, 0, &attrbits, NULL, 6080 NULL, 0, 0, 0, 0, 0, NULL); 6081 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred, 6082 NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 6083 if (error != 0) { 6084 free(nd, M_TEMP); 6085 return (error); 6086 } 6087 NFSD_DEBUG(4, "nfsrv_setacldsdorpc: aft setaclrpc=%d\n", 6088 nd->nd_repstat); 6089 error = nd->nd_repstat; 6090 m_freem(nd->nd_mrep); 6091 free(nd, M_TEMP); 6092 return (error); 6093 } 6094 6095 struct nfsrvsetacldsdorpc { 6096 int done; 6097 int inprog; 6098 struct task tsk; 6099 fhandle_t fh; 6100 struct nfsmount *nmp; 6101 struct vnode *vp; 6102 struct ucred *cred; 6103 NFSPROC_T *p; 6104 struct acl *aclp; 6105 int err; 6106 }; 6107 6108 /* 6109 * Start up the thread that will execute nfsrv_setacldsdorpc(). 6110 */ 6111 static void 6112 start_setacldsdorpc(void *arg, int pending) 6113 { 6114 struct nfsrvsetacldsdorpc *drpc; 6115 6116 drpc = (struct nfsrvsetacldsdorpc *)arg; 6117 drpc->err = nfsrv_setacldsdorpc(&drpc->fh, drpc->cred, drpc->p, 6118 drpc->vp, drpc->nmp, drpc->aclp); 6119 drpc->done = 1; 6120 } 6121 6122 static int 6123 nfsrv_setacldsrpc(fhandle_t *fhp, struct ucred *cred, NFSPROC_T *p, 6124 struct vnode *vp, struct nfsmount **nmpp, int mirrorcnt, struct acl *aclp, 6125 int *failposp) 6126 { 6127 struct nfsrvsetacldsdorpc *drpc, *tdrpc = NULL; 6128 int error, i, ret, timo; 6129 6130 NFSD_DEBUG(4, "in nfsrv_setacldsrpc\n"); 6131 drpc = NULL; 6132 if (mirrorcnt > 1) 6133 tdrpc = drpc = malloc(sizeof(*drpc) * (mirrorcnt - 1), M_TEMP, 6134 M_WAITOK); 6135 6136 /* 6137 * Do the setattr RPC for every DS, using a separate kernel process 6138 * for every DS except the last one. 6139 */ 6140 error = 0; 6141 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 6142 tdrpc->done = 0; 6143 tdrpc->inprog = 0; 6144 NFSBCOPY(fhp, &tdrpc->fh, sizeof(*fhp)); 6145 tdrpc->nmp = *nmpp; 6146 tdrpc->vp = vp; 6147 tdrpc->cred = cred; 6148 tdrpc->p = p; 6149 tdrpc->aclp = aclp; 6150 tdrpc->err = 0; 6151 ret = EIO; 6152 if (nfs_pnfsiothreads != 0) { 6153 ret = nfs_pnfsio(start_setacldsdorpc, tdrpc); 6154 NFSD_DEBUG(4, "nfsrv_setacldsrpc: nfs_pnfsio=%d\n", 6155 ret); 6156 } 6157 if (ret != 0) { 6158 ret = nfsrv_setacldsdorpc(fhp, cred, p, vp, *nmpp, 6159 aclp); 6160 if (nfsds_failerr(ret) && *failposp == -1) 6161 *failposp = i; 6162 else if (error == 0 && ret != 0) 6163 error = ret; 6164 } 6165 nmpp++; 6166 fhp++; 6167 } 6168 ret = nfsrv_setacldsdorpc(fhp, cred, p, vp, *nmpp, aclp); 6169 if (nfsds_failerr(ret) && *failposp == -1 && mirrorcnt > 1) 6170 *failposp = mirrorcnt - 1; 6171 else if (error == 0 && ret != 0) 6172 error = ret; 6173 NFSD_DEBUG(4, "nfsrv_setacldsrpc: aft setextat=%d\n", error); 6174 tdrpc = drpc; 6175 timo = hz / 50; /* Wait for 20msec. */ 6176 if (timo < 1) 6177 timo = 1; 6178 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 6179 /* Wait for RPCs on separate threads to complete. */ 6180 while (tdrpc->inprog != 0 && tdrpc->done == 0) 6181 tsleep(&tdrpc->tsk, PVFS, "srvacds", timo); 6182 if (nfsds_failerr(tdrpc->err) && *failposp == -1) 6183 *failposp = i; 6184 else if (error == 0 && tdrpc->err != 0) 6185 error = tdrpc->err; 6186 } 6187 free(drpc, M_TEMP); 6188 return (error); 6189 } 6190 6191 /* 6192 * Getattr call to the DS for the attributes that change due to writing. 6193 */ 6194 static int 6195 nfsrv_getattrdsrpc(fhandle_t *fhp, struct ucred *cred, NFSPROC_T *p, 6196 struct vnode *vp, struct nfsmount *nmp, struct nfsvattr *nap) 6197 { 6198 struct nfsrv_descript *nd; 6199 int error; 6200 nfsattrbit_t attrbits; 6201 6202 NFSD_DEBUG(4, "in nfsrv_getattrdsrpc\n"); 6203 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 6204 nfscl_reqstart(nd, NFSPROC_GETATTR, nmp, (u_int8_t *)fhp, 6205 sizeof(fhandle_t), NULL, NULL, 0, 0, cred); 6206 NFSZERO_ATTRBIT(&attrbits); 6207 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SIZE); 6208 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_CHANGE); 6209 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEACCESS); 6210 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEMODIFY); 6211 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SPACEUSED); 6212 (void) nfsrv_putattrbit(nd, &attrbits); 6213 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred, 6214 NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 6215 if (error != 0) { 6216 free(nd, M_TEMP); 6217 return (error); 6218 } 6219 NFSD_DEBUG(4, "nfsrv_getattrdsrpc: aft getattrrpc=%d\n", 6220 nd->nd_repstat); 6221 if (nd->nd_repstat == 0) { 6222 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, 6223 NULL, NULL, NULL, NULL, NULL, 0, NULL, NULL, NULL, 6224 NULL, NULL); 6225 /* 6226 * We can only save the updated values in the extended 6227 * attribute if the vp is exclusively locked. 6228 * This should happen when any of the following operations 6229 * occur on the vnode: 6230 * Close, Delegreturn, LayoutCommit, LayoutReturn 6231 * As such, the updated extended attribute should get saved 6232 * before nfsrv_checkdsattr() returns 0 and allows the cached 6233 * attributes to be returned without calling this function. 6234 */ 6235 if (error == 0 && VOP_ISLOCKED(vp) == LK_EXCLUSIVE) { 6236 error = nfsrv_setextattr(vp, nap, p); 6237 NFSD_DEBUG(4, "nfsrv_getattrdsrpc: aft setextat=%d\n", 6238 error); 6239 } 6240 } else 6241 error = nd->nd_repstat; 6242 m_freem(nd->nd_mrep); 6243 free(nd, M_TEMP); 6244 NFSD_DEBUG(4, "nfsrv_getattrdsrpc error=%d\n", error); 6245 return (error); 6246 } 6247 6248 /* 6249 * Seek call to a DS. 6250 */ 6251 static int 6252 nfsrv_seekdsrpc(fhandle_t *fhp, off_t *offp, int content, bool *eofp, 6253 struct ucred *cred, NFSPROC_T *p, struct nfsmount *nmp) 6254 { 6255 uint32_t *tl; 6256 struct nfsrv_descript *nd; 6257 nfsv4stateid_t st; 6258 int error; 6259 6260 NFSD_DEBUG(4, "in nfsrv_seekdsrpc\n"); 6261 /* 6262 * Use a stateid where other is an alternating 01010 pattern and 6263 * seqid is 0xffffffff. This value is not defined as special by 6264 * the RFC and is used by the FreeBSD NFS server to indicate an 6265 * MDS->DS proxy operation. 6266 */ 6267 st.other[0] = 0x55555555; 6268 st.other[1] = 0x55555555; 6269 st.other[2] = 0x55555555; 6270 st.seqid = 0xffffffff; 6271 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 6272 nfscl_reqstart(nd, NFSPROC_SEEKDS, nmp, (u_int8_t *)fhp, 6273 sizeof(fhandle_t), NULL, NULL, 0, 0, cred); 6274 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 6275 NFSM_BUILD(tl, uint32_t *, NFSX_HYPER + NFSX_UNSIGNED); 6276 txdr_hyper(*offp, tl); tl += 2; 6277 *tl = txdr_unsigned(content); 6278 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred, 6279 NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 6280 if (error != 0) { 6281 free(nd, M_TEMP); 6282 return (error); 6283 } 6284 NFSD_DEBUG(4, "nfsrv_seekdsrpc: aft seekrpc=%d\n", nd->nd_repstat); 6285 if (nd->nd_repstat == 0) { 6286 NFSM_DISSECT(tl, uint32_t *, NFSX_UNSIGNED + NFSX_HYPER); 6287 if (*tl++ == newnfs_true) 6288 *eofp = true; 6289 else 6290 *eofp = false; 6291 *offp = fxdr_hyper(tl); 6292 } else 6293 error = nd->nd_repstat; 6294 nfsmout: 6295 m_freem(nd->nd_mrep); 6296 free(nd, M_TEMP); 6297 NFSD_DEBUG(4, "nfsrv_seekdsrpc error=%d\n", error); 6298 return (error); 6299 } 6300 6301 /* 6302 * Get the device id and file handle for a DS file. 6303 */ 6304 int 6305 nfsrv_dsgetdevandfh(struct vnode *vp, NFSPROC_T *p, int *mirrorcntp, 6306 fhandle_t *fhp, char *devid) 6307 { 6308 int buflen, error; 6309 char *buf; 6310 6311 buflen = 1024; 6312 buf = malloc(buflen, M_TEMP, M_WAITOK); 6313 error = nfsrv_dsgetsockmnt(vp, 0, buf, &buflen, mirrorcntp, p, NULL, 6314 fhp, devid, NULL, NULL, NULL, NULL, NULL, NULL); 6315 free(buf, M_TEMP); 6316 return (error); 6317 } 6318 6319 /* 6320 * Do a Lookup against the DS for the filename. 6321 */ 6322 static int 6323 nfsrv_pnfslookupds(struct vnode *vp, struct vnode *dvp, struct pnfsdsfile *pf, 6324 struct vnode **nvpp, NFSPROC_T *p) 6325 { 6326 struct nameidata named; 6327 struct ucred *tcred; 6328 char *bufp; 6329 u_long *hashp; 6330 struct vnode *nvp; 6331 int error; 6332 6333 tcred = newnfs_getcred(); 6334 named.ni_cnd.cn_nameiop = LOOKUP; 6335 named.ni_cnd.cn_lkflags = LK_SHARED | LK_RETRY; 6336 named.ni_cnd.cn_cred = tcred; 6337 named.ni_cnd.cn_flags = ISLASTCN | LOCKPARENT | LOCKLEAF; 6338 nfsvno_setpathbuf(&named, &bufp, &hashp); 6339 named.ni_cnd.cn_nameptr = bufp; 6340 named.ni_cnd.cn_namelen = strlen(pf->dsf_filename); 6341 strlcpy(bufp, pf->dsf_filename, NAME_MAX); 6342 NFSD_DEBUG(4, "nfsrv_pnfslookupds: filename=%s\n", bufp); 6343 error = VOP_LOOKUP(dvp, &nvp, &named.ni_cnd); 6344 NFSD_DEBUG(4, "nfsrv_pnfslookupds: aft LOOKUP=%d\n", error); 6345 NFSFREECRED(tcred); 6346 nfsvno_relpathbuf(&named); 6347 if (error == 0) 6348 *nvpp = nvp; 6349 NFSD_DEBUG(4, "eo nfsrv_pnfslookupds=%d\n", error); 6350 return (error); 6351 } 6352 6353 /* 6354 * Set the file handle to the correct one. 6355 */ 6356 static void 6357 nfsrv_pnfssetfh(struct vnode *vp, struct pnfsdsfile *pf, char *devid, 6358 char *fnamep, struct vnode *nvp, NFSPROC_T *p) 6359 { 6360 struct nfsnode *np; 6361 int ret = 0; 6362 6363 np = VTONFS(nvp); 6364 NFSBCOPY(np->n_fhp->nfh_fh, &pf->dsf_fh, NFSX_MYFH); 6365 /* 6366 * We can only do a vn_set_extattr() if the vnode is exclusively 6367 * locked and vn_start_write() has been done. If devid != NULL or 6368 * fnamep != NULL or the vnode is shared locked, vn_start_write() 6369 * may not have been done. 6370 * If not done now, it will be done on a future call. 6371 */ 6372 if (devid == NULL && fnamep == NULL && NFSVOPISLOCKED(vp) == 6373 LK_EXCLUSIVE) 6374 ret = vn_extattr_set(vp, IO_NODELOCKED, 6375 EXTATTR_NAMESPACE_SYSTEM, "pnfsd.dsfile", sizeof(*pf), 6376 (char *)pf, p); 6377 NFSD_DEBUG(4, "eo nfsrv_pnfssetfh=%d\n", ret); 6378 } 6379 6380 /* 6381 * Cause RPCs waiting on "nmp" to fail. This is called for a DS mount point 6382 * when the DS has failed. 6383 */ 6384 void 6385 nfsrv_killrpcs(struct nfsmount *nmp) 6386 { 6387 6388 /* 6389 * Call newnfs_nmcancelreqs() to cause 6390 * any RPCs in progress on the mount point to 6391 * fail. 6392 * This will cause any process waiting for an 6393 * RPC to complete while holding a vnode lock 6394 * on the mounted-on vnode (such as "df" or 6395 * a non-forced "umount") to fail. 6396 * This will unlock the mounted-on vnode so 6397 * a forced dismount can succeed. 6398 * The NFSMNTP_CANCELRPCS flag should be set when this function is 6399 * called. 6400 */ 6401 newnfs_nmcancelreqs(nmp); 6402 } 6403 6404 /* 6405 * Sum up the statfs info for each of the DSs, so that the client will 6406 * receive the total for all DSs. 6407 */ 6408 static int 6409 nfsrv_pnfsstatfs(struct statfs *sf, struct mount *mp) 6410 { 6411 struct statfs *tsf; 6412 struct nfsdevice *ds; 6413 struct vnode **dvpp, **tdvpp, *dvp; 6414 uint64_t tot; 6415 int cnt, error = 0, i; 6416 6417 if (nfsrv_devidcnt <= 0) 6418 return (ENXIO); 6419 dvpp = mallocarray(nfsrv_devidcnt, sizeof(*dvpp), M_TEMP, M_WAITOK); 6420 tsf = malloc(sizeof(*tsf), M_TEMP, M_WAITOK); 6421 6422 /* Get an array of the dvps for the DSs. */ 6423 tdvpp = dvpp; 6424 i = 0; 6425 NFSDDSLOCK(); 6426 /* First, search for matches for same file system. */ 6427 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 6428 if (ds->nfsdev_nmp != NULL && ds->nfsdev_mdsisset != 0 && 6429 fsidcmp(&ds->nfsdev_mdsfsid, &mp->mnt_stat.f_fsid) == 0) { 6430 if (++i > nfsrv_devidcnt) 6431 break; 6432 *tdvpp++ = ds->nfsdev_dvp; 6433 } 6434 } 6435 /* 6436 * If no matches for same file system, total all servers not assigned 6437 * to a file system. 6438 */ 6439 if (i == 0) { 6440 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 6441 if (ds->nfsdev_nmp != NULL && 6442 ds->nfsdev_mdsisset == 0) { 6443 if (++i > nfsrv_devidcnt) 6444 break; 6445 *tdvpp++ = ds->nfsdev_dvp; 6446 } 6447 } 6448 } 6449 NFSDDSUNLOCK(); 6450 cnt = i; 6451 6452 /* Do a VFS_STATFS() for each of the DSs and sum them up. */ 6453 tdvpp = dvpp; 6454 for (i = 0; i < cnt && error == 0; i++) { 6455 dvp = *tdvpp++; 6456 error = VFS_STATFS(dvp->v_mount, tsf); 6457 if (error == 0) { 6458 if (sf->f_bsize == 0) { 6459 if (tsf->f_bsize > 0) 6460 sf->f_bsize = tsf->f_bsize; 6461 else 6462 sf->f_bsize = 8192; 6463 } 6464 if (tsf->f_blocks > 0) { 6465 if (sf->f_bsize != tsf->f_bsize) { 6466 tot = tsf->f_blocks * tsf->f_bsize; 6467 sf->f_blocks += (tot / sf->f_bsize); 6468 } else 6469 sf->f_blocks += tsf->f_blocks; 6470 } 6471 if (tsf->f_bfree > 0) { 6472 if (sf->f_bsize != tsf->f_bsize) { 6473 tot = tsf->f_bfree * tsf->f_bsize; 6474 sf->f_bfree += (tot / sf->f_bsize); 6475 } else 6476 sf->f_bfree += tsf->f_bfree; 6477 } 6478 if (tsf->f_bavail > 0) { 6479 if (sf->f_bsize != tsf->f_bsize) { 6480 tot = tsf->f_bavail * tsf->f_bsize; 6481 sf->f_bavail += (tot / sf->f_bsize); 6482 } else 6483 sf->f_bavail += tsf->f_bavail; 6484 } 6485 } 6486 } 6487 free(tsf, M_TEMP); 6488 free(dvpp, M_TEMP); 6489 return (error); 6490 } 6491 6492 /* 6493 * Set an NFSv4 acl. 6494 */ 6495 int 6496 nfsrv_setacl(struct vnode *vp, NFSACL_T *aclp, struct ucred *cred, NFSPROC_T *p) 6497 { 6498 int error; 6499 6500 if (nfsrv_useacl == 0 || nfs_supportsnfsv4acls(vp) == 0) { 6501 error = NFSERR_ATTRNOTSUPP; 6502 goto out; 6503 } 6504 /* 6505 * With NFSv4 ACLs, chmod(2) may need to add additional entries. 6506 * Make sure it has enough room for that - splitting every entry 6507 * into two and appending "canonical six" entries at the end. 6508 * Cribbed out of kern/vfs_acl.c - Rick M. 6509 */ 6510 if (aclp->acl_cnt > (ACL_MAX_ENTRIES - 6) / 2) { 6511 error = NFSERR_ATTRNOTSUPP; 6512 goto out; 6513 } 6514 error = VOP_SETACL(vp, ACL_TYPE_NFS4, aclp, cred, p); 6515 if (error == 0) { 6516 error = nfsrv_dssetacl(vp, aclp, cred, p); 6517 if (error == ENOENT) 6518 error = 0; 6519 } 6520 6521 out: 6522 NFSEXITCODE(error); 6523 return (error); 6524 } 6525 6526 /* 6527 * Seek vnode op call (actually it is a VOP_IOCTL()). 6528 * This function is called with the vnode locked, but unlocks and vrele()s 6529 * the vp before returning. 6530 */ 6531 int 6532 nfsvno_seek(struct nfsrv_descript *nd, struct vnode *vp, u_long cmd, 6533 off_t *offp, int content, bool *eofp, struct ucred *cred, NFSPROC_T *p) 6534 { 6535 struct nfsvattr at; 6536 int error, ret; 6537 6538 ASSERT_VOP_LOCKED(vp, "nfsvno_seek vp"); 6539 /* 6540 * Attempt to seek on a DS file. A return of ENOENT implies 6541 * there is no DS file to seek on. 6542 */ 6543 error = nfsrv_proxyds(vp, 0, 0, cred, p, NFSPROC_SEEKDS, NULL, 6544 NULL, NULL, NULL, NULL, offp, content, eofp); 6545 if (error != ENOENT) { 6546 vput(vp); 6547 return (error); 6548 } 6549 6550 /* 6551 * Do the VOP_IOCTL() call. For the case where *offp == file_size, 6552 * VOP_IOCTL() will return ENXIO. However, the correct reply for 6553 * NFSv4.2 is *eofp == true and error == 0 for this case. 6554 */ 6555 NFSVOPUNLOCK(vp); 6556 error = VOP_IOCTL(vp, cmd, offp, 0, cred, p); 6557 *eofp = false; 6558 if (error == ENXIO || (error == 0 && cmd == FIOSEEKHOLE)) { 6559 /* Handle the cases where we might be at EOF. */ 6560 ret = nfsvno_getattr(vp, &at, nd, p, 0, NULL); 6561 if (ret == 0 && *offp == at.na_size) { 6562 *eofp = true; 6563 error = 0; 6564 } 6565 if (ret != 0 && error == 0) 6566 error = ret; 6567 } 6568 vrele(vp); 6569 NFSEXITCODE(error); 6570 return (error); 6571 } 6572 6573 /* 6574 * Allocate vnode op call. 6575 */ 6576 int 6577 nfsvno_allocate(struct vnode *vp, off_t off, off_t len, struct ucred *cred, 6578 NFSPROC_T *p) 6579 { 6580 int error; 6581 off_t olen; 6582 6583 ASSERT_VOP_ELOCKED(vp, "nfsvno_allocate vp"); 6584 /* 6585 * Attempt to allocate on a DS file. A return of ENOENT implies 6586 * there is no DS file to allocate on. 6587 */ 6588 error = nfsrv_proxyds(vp, off, 0, cred, p, NFSPROC_ALLOCATE, NULL, 6589 NULL, NULL, NULL, NULL, &len, 0, NULL); 6590 if (error != ENOENT) 6591 return (error); 6592 6593 /* 6594 * Do the actual VOP_ALLOCATE(), looping so long as 6595 * progress is being made, to achieve completion. 6596 */ 6597 do { 6598 olen = len; 6599 error = VOP_ALLOCATE(vp, &off, &len, IO_SYNC, cred); 6600 if (error == 0 && len > 0 && olen > len) 6601 maybe_yield(); 6602 } while (error == 0 && len > 0 && olen > len); 6603 if (error == 0 && len > 0) 6604 error = NFSERR_IO; 6605 NFSEXITCODE(error); 6606 return (error); 6607 } 6608 6609 /* 6610 * Deallocate vnode op call. 6611 */ 6612 int 6613 nfsvno_deallocate(struct vnode *vp, off_t off, off_t len, struct ucred *cred, 6614 NFSPROC_T *p) 6615 { 6616 int error; 6617 off_t olen; 6618 6619 ASSERT_VOP_ELOCKED(vp, "nfsvno_deallocate vp"); 6620 /* 6621 * Attempt to deallocate on a DS file. A return of ENOENT implies 6622 * there is no DS file to deallocate on. 6623 */ 6624 error = nfsrv_proxyds(vp, off, 0, cred, p, NFSPROC_DEALLOCATE, NULL, 6625 NULL, NULL, NULL, NULL, &len, 0, NULL); 6626 if (error != ENOENT) 6627 return (error); 6628 6629 /* 6630 * Do the actual VOP_DEALLOCATE(), looping so long as 6631 * progress is being made, to achieve completion. 6632 */ 6633 do { 6634 olen = len; 6635 error = VOP_DEALLOCATE(vp, &off, &len, 0, IO_SYNC, cred); 6636 if (error == 0 && len > 0 && olen > len) 6637 maybe_yield(); 6638 } while (error == 0 && len > 0 && olen > len); 6639 if (error == 0 && len > 0) 6640 error = NFSERR_IO; 6641 NFSEXITCODE(error); 6642 return (error); 6643 } 6644 6645 /* 6646 * Get Extended Atribute vnode op into an mbuf list. 6647 */ 6648 int 6649 nfsvno_getxattr(struct vnode *vp, char *name, uint32_t maxresp, 6650 struct ucred *cred, uint64_t flag, int maxextsiz, struct thread *p, 6651 struct mbuf **mpp, struct mbuf **mpendp, int *lenp) 6652 { 6653 struct iovec *iv; 6654 struct uio io, *uiop = &io; 6655 struct mbuf *m, *m2; 6656 int alen, error, len, tlen; 6657 size_t siz; 6658 6659 /* First, find out the size of the extended attribute. */ 6660 error = VOP_GETEXTATTR(vp, EXTATTR_NAMESPACE_USER, name, NULL, 6661 &siz, cred, p); 6662 if (error != 0) 6663 return (NFSERR_NOXATTR); 6664 if (siz > maxresp - NFS_MAXXDR) 6665 return (NFSERR_XATTR2BIG); 6666 len = siz; 6667 tlen = NFSM_RNDUP(len); 6668 if (tlen > 0) { 6669 /* 6670 * If cnt > MCLBYTES and the reply will not be saved, use 6671 * ext_pgs mbufs for TLS. 6672 * For NFSv4.0, we do not know for sure if the reply will 6673 * be saved, so do not use ext_pgs mbufs for NFSv4.0. 6674 * Always use ext_pgs mbufs if ND_EXTPG is set. 6675 */ 6676 if ((flag & ND_EXTPG) != 0 || (tlen > MCLBYTES && 6677 (flag & (ND_TLS | ND_SAVEREPLY)) == ND_TLS && 6678 (flag & (ND_NFSV4 | ND_NFSV41)) != ND_NFSV4)) 6679 uiop->uio_iovcnt = nfsrv_createiovec_extpgs(tlen, 6680 maxextsiz, &m, &m2, &iv); 6681 else 6682 uiop->uio_iovcnt = nfsrv_createiovec(tlen, &m, &m2, 6683 &iv); 6684 uiop->uio_iov = iv; 6685 } else { 6686 uiop->uio_iovcnt = 0; 6687 uiop->uio_iov = iv = NULL; 6688 m = m2 = NULL; 6689 } 6690 uiop->uio_offset = 0; 6691 uiop->uio_resid = tlen; 6692 uiop->uio_rw = UIO_READ; 6693 uiop->uio_segflg = UIO_SYSSPACE; 6694 uiop->uio_td = p; 6695 #ifdef MAC 6696 error = mac_vnode_check_getextattr(cred, vp, EXTATTR_NAMESPACE_USER, 6697 name); 6698 if (error != 0) 6699 goto out; 6700 #endif 6701 6702 if (tlen > 0) 6703 error = VOP_GETEXTATTR(vp, EXTATTR_NAMESPACE_USER, name, uiop, 6704 NULL, cred, p); 6705 if (error != 0) 6706 goto out; 6707 if (uiop->uio_resid > 0) { 6708 alen = tlen; 6709 len = tlen - uiop->uio_resid; 6710 tlen = NFSM_RNDUP(len); 6711 if (alen != tlen) 6712 printf("nfsvno_getxattr: weird size read\n"); 6713 if (tlen == 0) { 6714 m_freem(m); 6715 m = m2 = NULL; 6716 } else if (alen != tlen || tlen != len) 6717 m2 = nfsrv_adj(m, alen - tlen, tlen - len); 6718 } 6719 *lenp = len; 6720 *mpp = m; 6721 *mpendp = m2; 6722 6723 out: 6724 if (error != 0) { 6725 if (m != NULL) 6726 m_freem(m); 6727 *lenp = 0; 6728 } 6729 free(iv, M_TEMP); 6730 NFSEXITCODE(error); 6731 return (error); 6732 } 6733 6734 /* 6735 * Set Extended attribute vnode op from an mbuf list. 6736 */ 6737 int 6738 nfsvno_setxattr(struct vnode *vp, char *name, int len, struct mbuf *m, 6739 char *cp, struct ucred *cred, struct thread *p) 6740 { 6741 struct iovec *iv; 6742 struct uio uio, *uiop = &uio; 6743 int cnt, error; 6744 6745 error = 0; 6746 #ifdef MAC 6747 error = mac_vnode_check_setextattr(cred, vp, EXTATTR_NAMESPACE_USER, 6748 name); 6749 #endif 6750 if (error != 0) 6751 goto out; 6752 6753 uiop->uio_rw = UIO_WRITE; 6754 uiop->uio_segflg = UIO_SYSSPACE; 6755 uiop->uio_td = p; 6756 uiop->uio_offset = 0; 6757 uiop->uio_resid = len; 6758 if (len > 0) { 6759 error = nfsrv_createiovecw(len, m, cp, &iv, &cnt); 6760 uiop->uio_iov = iv; 6761 uiop->uio_iovcnt = cnt; 6762 } else { 6763 uiop->uio_iov = iv = NULL; 6764 uiop->uio_iovcnt = 0; 6765 } 6766 if (error == 0) { 6767 error = VOP_SETEXTATTR(vp, EXTATTR_NAMESPACE_USER, name, uiop, 6768 cred, p); 6769 if (error == 0) { 6770 if (vp->v_type == VREG && nfsrv_devidcnt != 0) 6771 nfsvno_updateds(vp, cred, p); 6772 error = VOP_FSYNC(vp, MNT_WAIT, p); 6773 } 6774 free(iv, M_TEMP); 6775 } 6776 6777 out: 6778 NFSEXITCODE(error); 6779 return (error); 6780 } 6781 6782 /* 6783 * For a pNFS server, the DS file's ctime and 6784 * va_filerev (TimeMetadata and Change) needs to 6785 * be updated. This is a hack, but works by 6786 * flipping the S_ISGID bit in va_mode and then 6787 * flipping it back. 6788 * It does result in two MDS->DS RPCs, but creating 6789 * a custom RPC just to do this seems overkill, since 6790 * Setxattr/Rmxattr will not be done that frequently. 6791 * If it fails part way through, that is not too 6792 * serious, since the DS file is never executed. 6793 */ 6794 static void 6795 nfsvno_updateds(struct vnode *vp, struct ucred *cred, NFSPROC_T *p) 6796 { 6797 struct nfsvattr nva; 6798 int ret; 6799 u_short tmode; 6800 6801 ret = VOP_GETATTR(vp, &nva.na_vattr, cred); 6802 if (ret == 0) { 6803 tmode = nva.na_mode; 6804 NFSVNO_ATTRINIT(&nva); 6805 tmode ^= S_ISGID; 6806 NFSVNO_SETATTRVAL(&nva, mode, tmode); 6807 ret = nfsrv_proxyds(vp, 0, 0, cred, p, 6808 NFSPROC_SETATTR, NULL, NULL, NULL, &nva, 6809 NULL, NULL, 0, NULL); 6810 if (ret == 0) { 6811 tmode ^= S_ISGID; 6812 NFSVNO_SETATTRVAL(&nva, mode, tmode); 6813 ret = nfsrv_proxyds(vp, 0, 0, cred, p, 6814 NFSPROC_SETATTR, NULL, NULL, NULL, 6815 &nva, NULL, NULL, 0, NULL); 6816 } 6817 } 6818 } 6819 6820 /* 6821 * Remove Extended attribute vnode op. 6822 */ 6823 int 6824 nfsvno_rmxattr(struct nfsrv_descript *nd, struct vnode *vp, char *name, 6825 struct ucred *cred, struct thread *p) 6826 { 6827 int error; 6828 6829 /* 6830 * Get rid of any delegations. I am not sure why this is required, 6831 * but RFC-8276 says so. 6832 */ 6833 error = nfsrv_checkremove(vp, 0, nd, nd->nd_clientid, p); 6834 if (error != 0) 6835 goto out; 6836 #ifdef MAC 6837 error = mac_vnode_check_deleteextattr(cred, vp, EXTATTR_NAMESPACE_USER, 6838 name); 6839 if (error != 0) 6840 goto out; 6841 #endif 6842 6843 error = VOP_DELETEEXTATTR(vp, EXTATTR_NAMESPACE_USER, name, cred, p); 6844 if (error == EOPNOTSUPP) 6845 error = VOP_SETEXTATTR(vp, EXTATTR_NAMESPACE_USER, name, NULL, 6846 cred, p); 6847 if (error == 0) { 6848 if (vp->v_type == VREG && nfsrv_devidcnt != 0) 6849 nfsvno_updateds(vp, cred, p); 6850 error = VOP_FSYNC(vp, MNT_WAIT, p); 6851 } 6852 out: 6853 NFSEXITCODE(error); 6854 return (error); 6855 } 6856 6857 /* 6858 * List Extended Atribute vnode op into an mbuf list. 6859 */ 6860 int 6861 nfsvno_listxattr(struct vnode *vp, uint64_t cookie, struct ucred *cred, 6862 struct thread *p, u_char **bufp, uint32_t *lenp, bool *eofp) 6863 { 6864 struct iovec iv; 6865 struct uio io; 6866 int error; 6867 size_t siz; 6868 6869 *bufp = NULL; 6870 /* First, find out the size of the extended attribute. */ 6871 error = VOP_LISTEXTATTR(vp, EXTATTR_NAMESPACE_USER, NULL, &siz, cred, 6872 p); 6873 if (error != 0) 6874 return (NFSERR_NOXATTR); 6875 if (siz <= cookie) { 6876 *lenp = 0; 6877 *eofp = true; 6878 goto out; 6879 } 6880 if (siz > cookie + *lenp) { 6881 siz = cookie + *lenp; 6882 *eofp = false; 6883 } else 6884 *eofp = true; 6885 /* Just choose a sanity limit of 10Mbytes for malloc(M_TEMP). */ 6886 if (siz > 10 * 1024 * 1024) { 6887 error = NFSERR_XATTR2BIG; 6888 goto out; 6889 } 6890 *bufp = malloc(siz, M_TEMP, M_WAITOK); 6891 iv.iov_base = *bufp; 6892 iv.iov_len = siz; 6893 io.uio_iovcnt = 1; 6894 io.uio_iov = &iv; 6895 io.uio_offset = 0; 6896 io.uio_resid = siz; 6897 io.uio_rw = UIO_READ; 6898 io.uio_segflg = UIO_SYSSPACE; 6899 io.uio_td = p; 6900 #ifdef MAC 6901 error = mac_vnode_check_listextattr(cred, vp, EXTATTR_NAMESPACE_USER); 6902 if (error != 0) 6903 goto out; 6904 #endif 6905 6906 error = VOP_LISTEXTATTR(vp, EXTATTR_NAMESPACE_USER, &io, NULL, cred, 6907 p); 6908 if (error != 0) 6909 goto out; 6910 if (io.uio_resid > 0) 6911 siz -= io.uio_resid; 6912 *lenp = siz; 6913 6914 out: 6915 if (error != 0) { 6916 free(*bufp, M_TEMP); 6917 *bufp = NULL; 6918 } 6919 NFSEXITCODE(error); 6920 return (error); 6921 } 6922 6923 /* 6924 * Trim trailing data off the mbuf list being built. 6925 */ 6926 void 6927 nfsm_trimtrailing(struct nfsrv_descript *nd, struct mbuf *mb, char *bpos, 6928 int bextpg, int bextpgsiz) 6929 { 6930 vm_page_t pg; 6931 int fullpgsiz, i; 6932 6933 if (mb->m_next != NULL) { 6934 m_freem(mb->m_next); 6935 mb->m_next = NULL; 6936 } 6937 if ((mb->m_flags & M_EXTPG) != 0) { 6938 KASSERT(bextpg >= 0 && bextpg < mb->m_epg_npgs, 6939 ("nfsm_trimtrailing: bextpg out of range")); 6940 KASSERT(bpos == (char *)(void *) 6941 PHYS_TO_DMAP(mb->m_epg_pa[bextpg]) + PAGE_SIZE - bextpgsiz, 6942 ("nfsm_trimtrailing: bextpgsiz bad!")); 6943 6944 /* First, get rid of any pages after this position. */ 6945 for (i = mb->m_epg_npgs - 1; i > bextpg; i--) { 6946 pg = PHYS_TO_VM_PAGE(mb->m_epg_pa[i]); 6947 vm_page_unwire_noq(pg); 6948 vm_page_free(pg); 6949 } 6950 mb->m_epg_npgs = bextpg + 1; 6951 if (bextpg == 0) 6952 fullpgsiz = PAGE_SIZE - mb->m_epg_1st_off; 6953 else 6954 fullpgsiz = PAGE_SIZE; 6955 mb->m_epg_last_len = fullpgsiz - bextpgsiz; 6956 mb->m_len = m_epg_pagelen(mb, 0, mb->m_epg_1st_off); 6957 for (i = 1; i < mb->m_epg_npgs; i++) 6958 mb->m_len += m_epg_pagelen(mb, i, 0); 6959 nd->nd_bextpgsiz = bextpgsiz; 6960 nd->nd_bextpg = bextpg; 6961 } else 6962 mb->m_len = bpos - mtod(mb, char *); 6963 nd->nd_mb = mb; 6964 nd->nd_bpos = bpos; 6965 } 6966 6967 6968 /* 6969 * Check to see if a put file handle operation should test for 6970 * NFSERR_WRONGSEC, although NFSv3 actually returns NFSERR_AUTHERR. 6971 * When Open is the next operation, NFSERR_WRONGSEC cannot be 6972 * replied for the Open cases that use a component. This can 6973 * be identified by the fact that the file handle's type is VDIR. 6974 */ 6975 bool 6976 nfsrv_checkwrongsec(struct nfsrv_descript *nd, int nextop, enum vtype vtyp) 6977 { 6978 6979 if ((nd->nd_flag & ND_NFSV4) == 0) 6980 return (true); 6981 6982 if ((nd->nd_flag & ND_LASTOP) != 0) 6983 return (false); 6984 6985 if (nextop == NFSV4OP_PUTROOTFH || nextop == NFSV4OP_PUTFH || 6986 nextop == NFSV4OP_PUTPUBFH || nextop == NFSV4OP_RESTOREFH || 6987 nextop == NFSV4OP_LOOKUP || nextop == NFSV4OP_LOOKUPP || 6988 nextop == NFSV4OP_SECINFO || nextop == NFSV4OP_SECINFONONAME) 6989 return (false); 6990 if (nextop == NFSV4OP_OPEN && vtyp == VDIR) 6991 return (false); 6992 return (true); 6993 } 6994 6995 /* 6996 * Check DSs marked no space. 6997 */ 6998 void 6999 nfsrv_checknospc(void) 7000 { 7001 struct statfs *tsf; 7002 struct nfsdevice *ds; 7003 struct vnode **dvpp, **tdvpp, *dvp; 7004 char *devid, *tdevid; 7005 int cnt, error = 0, i; 7006 7007 if (nfsrv_devidcnt <= 0) 7008 return; 7009 dvpp = mallocarray(nfsrv_devidcnt, sizeof(*dvpp), M_TEMP, M_WAITOK); 7010 devid = malloc(nfsrv_devidcnt * NFSX_V4DEVICEID, M_TEMP, M_WAITOK); 7011 tsf = malloc(sizeof(*tsf), M_TEMP, M_WAITOK); 7012 7013 /* Get an array of the dvps for the DSs. */ 7014 tdvpp = dvpp; 7015 tdevid = devid; 7016 i = 0; 7017 NFSDDSLOCK(); 7018 /* First, search for matches for same file system. */ 7019 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 7020 if (ds->nfsdev_nmp != NULL && ds->nfsdev_nospc) { 7021 if (++i > nfsrv_devidcnt) 7022 break; 7023 *tdvpp++ = ds->nfsdev_dvp; 7024 NFSBCOPY(ds->nfsdev_deviceid, tdevid, NFSX_V4DEVICEID); 7025 tdevid += NFSX_V4DEVICEID; 7026 } 7027 } 7028 NFSDDSUNLOCK(); 7029 7030 /* Do a VFS_STATFS() for each of the DSs and clear no space. */ 7031 cnt = i; 7032 tdvpp = dvpp; 7033 tdevid = devid; 7034 for (i = 0; i < cnt && error == 0; i++) { 7035 dvp = *tdvpp++; 7036 error = VFS_STATFS(dvp->v_mount, tsf); 7037 if (error == 0 && tsf->f_bavail > 0) { 7038 NFSD_DEBUG(1, "nfsrv_checknospc: reset nospc\n"); 7039 nfsrv_marknospc(tdevid, false); 7040 } 7041 tdevid += NFSX_V4DEVICEID; 7042 } 7043 free(tsf, M_TEMP); 7044 free(dvpp, M_TEMP); 7045 free(devid, M_TEMP); 7046 } 7047 7048 extern int (*nfsd_call_nfsd)(struct thread *, struct nfssvc_args *); 7049 7050 /* 7051 * Called once to initialize data structures... 7052 */ 7053 static int 7054 nfsd_modevent(module_t mod, int type, void *data) 7055 { 7056 int error = 0, i; 7057 static int loaded = 0; 7058 7059 switch (type) { 7060 case MOD_LOAD: 7061 if (loaded) 7062 goto out; 7063 newnfs_portinit(); 7064 for (i = 0; i < NFSRVCACHE_HASHSIZE; i++) { 7065 mtx_init(&nfsrchash_table[i].mtx, "nfsrtc", NULL, 7066 MTX_DEF); 7067 mtx_init(&nfsrcahash_table[i].mtx, "nfsrtca", NULL, 7068 MTX_DEF); 7069 } 7070 mtx_init(&nfsrc_udpmtx, "nfsuc", NULL, MTX_DEF); 7071 mtx_init(&nfs_v4root_mutex, "nfs4rt", NULL, MTX_DEF); 7072 mtx_init(&nfsv4root_mnt.mnt_mtx, "nfs4mnt", NULL, MTX_DEF); 7073 mtx_init(&nfsrv_dontlistlock_mtx, "nfs4dnl", NULL, MTX_DEF); 7074 mtx_init(&nfsrv_recalllock_mtx, "nfs4rec", NULL, MTX_DEF); 7075 lockinit(&nfsv4root_mnt.mnt_explock, PVFS, "explock", 0, 0); 7076 callout_init(&nfsd_callout, 1); 7077 nfsrvd_initcache(); 7078 nfsd_init(); 7079 NFSD_LOCK(); 7080 nfsrvd_init(0); 7081 NFSD_UNLOCK(); 7082 nfsd_mntinit(); 7083 #ifdef VV_DISABLEDELEG 7084 vn_deleg_ops.vndeleg_recall = nfsd_recalldelegation; 7085 vn_deleg_ops.vndeleg_disable = nfsd_disabledelegation; 7086 #endif 7087 nfsd_call_nfsd = nfssvc_nfsd; 7088 loaded = 1; 7089 break; 7090 7091 case MOD_UNLOAD: 7092 if (newnfs_numnfsd != 0) { 7093 error = EBUSY; 7094 break; 7095 } 7096 7097 #ifdef VV_DISABLEDELEG 7098 vn_deleg_ops.vndeleg_recall = NULL; 7099 vn_deleg_ops.vndeleg_disable = NULL; 7100 #endif 7101 nfsd_call_nfsd = NULL; 7102 callout_drain(&nfsd_callout); 7103 7104 /* Clean out all NFSv4 state. */ 7105 nfsrv_throwawayallstate(curthread); 7106 7107 /* Clean the NFS server reply cache */ 7108 nfsrvd_cleancache(); 7109 7110 /* Free up the krpc server pool. */ 7111 if (nfsrvd_pool != NULL) 7112 svcpool_destroy(nfsrvd_pool); 7113 7114 /* and get rid of the locks */ 7115 for (i = 0; i < NFSRVCACHE_HASHSIZE; i++) { 7116 mtx_destroy(&nfsrchash_table[i].mtx); 7117 mtx_destroy(&nfsrcahash_table[i].mtx); 7118 } 7119 mtx_destroy(&nfsrc_udpmtx); 7120 mtx_destroy(&nfs_v4root_mutex); 7121 mtx_destroy(&nfsv4root_mnt.mnt_mtx); 7122 mtx_destroy(&nfsrv_dontlistlock_mtx); 7123 mtx_destroy(&nfsrv_recalllock_mtx); 7124 for (i = 0; i < nfsrv_sessionhashsize; i++) 7125 mtx_destroy(&nfssessionhash[i].mtx); 7126 if (nfslayouthash != NULL) { 7127 for (i = 0; i < nfsrv_layouthashsize; i++) 7128 mtx_destroy(&nfslayouthash[i].mtx); 7129 free(nfslayouthash, M_NFSDSESSION); 7130 } 7131 lockdestroy(&nfsv4root_mnt.mnt_explock); 7132 free(nfsclienthash, M_NFSDCLIENT); 7133 free(nfslockhash, M_NFSDLOCKFILE); 7134 free(nfssessionhash, M_NFSDSESSION); 7135 loaded = 0; 7136 break; 7137 default: 7138 error = EOPNOTSUPP; 7139 break; 7140 } 7141 7142 out: 7143 NFSEXITCODE(error); 7144 return (error); 7145 } 7146 static moduledata_t nfsd_mod = { 7147 "nfsd", 7148 nfsd_modevent, 7149 NULL, 7150 }; 7151 DECLARE_MODULE(nfsd, nfsd_mod, SI_SUB_VFS, SI_ORDER_ANY); 7152 7153 /* So that loader and kldload(2) can find us, wherever we are.. */ 7154 MODULE_VERSION(nfsd, 1); 7155 MODULE_DEPEND(nfsd, nfscommon, 1, 1, 1); 7156 MODULE_DEPEND(nfsd, nfslockd, 1, 1, 1); 7157 MODULE_DEPEND(nfsd, krpc, 1, 1, 1); 7158 MODULE_DEPEND(nfsd, nfssvc, 1, 1, 1); 7159