1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 */ 35 36 #include <sys/cdefs.h> 37 __FBSDID("$FreeBSD$"); 38 39 #include <sys/capsicum.h> 40 #include <sys/extattr.h> 41 42 /* 43 * Functions that perform the vfs operations required by the routines in 44 * nfsd_serv.c. It is hoped that this change will make the server more 45 * portable. 46 */ 47 48 #include <fs/nfs/nfsport.h> 49 #include <security/mac/mac_framework.h> 50 #include <sys/filio.h> 51 #include <sys/hash.h> 52 #include <sys/sysctl.h> 53 #include <nlm/nlm_prot.h> 54 #include <nlm/nlm.h> 55 56 FEATURE(nfsd, "NFSv4 server"); 57 58 extern u_int32_t newnfs_true, newnfs_false, newnfs_xdrneg1; 59 extern int nfsrv_useacl; 60 extern int newnfs_numnfsd; 61 extern struct mount nfsv4root_mnt; 62 extern struct nfsrv_stablefirst nfsrv_stablefirst; 63 extern void (*nfsd_call_servertimer)(void); 64 extern SVCPOOL *nfsrvd_pool; 65 extern struct nfsv4lock nfsd_suspend_lock; 66 extern struct nfsclienthashhead *nfsclienthash; 67 extern struct nfslockhashhead *nfslockhash; 68 extern struct nfssessionhash *nfssessionhash; 69 extern int nfsrv_sessionhashsize; 70 extern struct nfsstatsv1 nfsstatsv1; 71 extern struct nfslayouthash *nfslayouthash; 72 extern int nfsrv_layouthashsize; 73 extern struct mtx nfsrv_dslock_mtx; 74 extern int nfs_pnfsiothreads; 75 extern struct nfsdontlisthead nfsrv_dontlisthead; 76 extern volatile int nfsrv_dontlistlen; 77 extern volatile int nfsrv_devidcnt; 78 extern int nfsrv_maxpnfsmirror; 79 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; 100 101 static int nfssvc_srvcall(struct thread *, struct nfssvc_args *, 102 struct ucred *); 103 104 int nfsrv_enable_crossmntpt = 1; 105 static int nfs_commit_blks; 106 static int nfs_commit_miss; 107 extern int nfsrv_issuedelegs; 108 extern int nfsrv_dolocallocks; 109 extern int nfsd_enable_stringtouid; 110 extern struct nfsdevicehead nfsrv_devidhead; 111 112 static int nfsrv_createiovec(int, struct mbuf **, struct mbuf **, 113 struct iovec **); 114 static int nfsrv_createiovec_extpgs(int, int, struct mbuf **, 115 struct mbuf **, struct iovec **); 116 static int nfsrv_createiovecw(int, struct mbuf *, char *, struct iovec **, 117 int *); 118 static void nfsrv_pnfscreate(struct vnode *, struct vattr *, struct ucred *, 119 NFSPROC_T *); 120 static void nfsrv_pnfsremovesetup(struct vnode *, NFSPROC_T *, struct vnode **, 121 int *, char *, fhandle_t *); 122 static void nfsrv_pnfsremove(struct vnode **, int, char *, fhandle_t *, 123 NFSPROC_T *); 124 static int nfsrv_proxyds(struct vnode *, off_t, int, struct ucred *, 125 struct thread *, int, struct mbuf **, char *, struct mbuf **, 126 struct nfsvattr *, struct acl *, off_t *, int, bool *); 127 static int nfsrv_setextattr(struct vnode *, struct nfsvattr *, NFSPROC_T *); 128 static int nfsrv_readdsrpc(fhandle_t *, off_t, int, struct ucred *, 129 NFSPROC_T *, struct nfsmount *, struct mbuf **, struct mbuf **); 130 static int nfsrv_writedsrpc(fhandle_t *, off_t, int, struct ucred *, 131 NFSPROC_T *, struct vnode *, struct nfsmount **, int, struct mbuf **, 132 char *, int *); 133 static int nfsrv_allocatedsrpc(fhandle_t *, off_t, off_t, struct ucred *, 134 NFSPROC_T *, struct vnode *, struct nfsmount **, int, int *); 135 static int nfsrv_deallocatedsrpc(fhandle_t *, off_t, off_t, struct ucred *, 136 NFSPROC_T *, struct vnode *, struct nfsmount **, int, int *); 137 static int nfsrv_setacldsrpc(fhandle_t *, struct ucred *, NFSPROC_T *, 138 struct vnode *, struct nfsmount **, int, struct acl *, int *); 139 static int nfsrv_setattrdsrpc(fhandle_t *, struct ucred *, NFSPROC_T *, 140 struct vnode *, struct nfsmount **, int, struct nfsvattr *, int *); 141 static int nfsrv_getattrdsrpc(fhandle_t *, struct ucred *, NFSPROC_T *, 142 struct vnode *, struct nfsmount *, struct nfsvattr *); 143 static int nfsrv_seekdsrpc(fhandle_t *, off_t *, int, bool *, struct ucred *, 144 NFSPROC_T *, struct nfsmount *); 145 static int nfsrv_putfhname(fhandle_t *, char *); 146 static int nfsrv_pnfslookupds(struct vnode *, struct vnode *, 147 struct pnfsdsfile *, struct vnode **, NFSPROC_T *); 148 static void nfsrv_pnfssetfh(struct vnode *, struct pnfsdsfile *, char *, char *, 149 struct vnode *, NFSPROC_T *); 150 static int nfsrv_dsremove(struct vnode *, char *, struct ucred *, NFSPROC_T *); 151 static int nfsrv_dssetacl(struct vnode *, struct acl *, struct ucred *, 152 NFSPROC_T *); 153 static int nfsrv_pnfsstatfs(struct statfs *, struct mount *); 154 155 int nfs_pnfsio(task_fn_t *, void *); 156 157 SYSCTL_NODE(_vfs, OID_AUTO, nfsd, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 158 "NFS server"); 159 SYSCTL_INT(_vfs_nfsd, OID_AUTO, mirrormnt, CTLFLAG_RW, 160 &nfsrv_enable_crossmntpt, 0, "Enable nfsd to cross mount points"); 161 SYSCTL_INT(_vfs_nfsd, OID_AUTO, commit_blks, CTLFLAG_RW, &nfs_commit_blks, 162 0, ""); 163 SYSCTL_INT(_vfs_nfsd, OID_AUTO, commit_miss, CTLFLAG_RW, &nfs_commit_miss, 164 0, ""); 165 SYSCTL_INT(_vfs_nfsd, OID_AUTO, issue_delegations, CTLFLAG_RW, 166 &nfsrv_issuedelegs, 0, "Enable nfsd to issue delegations"); 167 SYSCTL_INT(_vfs_nfsd, OID_AUTO, enable_locallocks, CTLFLAG_RW, 168 &nfsrv_dolocallocks, 0, "Enable nfsd to acquire local locks on files"); 169 SYSCTL_INT(_vfs_nfsd, OID_AUTO, debuglevel, CTLFLAG_RW, &nfsd_debuglevel, 170 0, "Debug level for NFS server"); 171 SYSCTL_INT(_vfs_nfsd, OID_AUTO, enable_stringtouid, CTLFLAG_RW, 172 &nfsd_enable_stringtouid, 0, "Enable nfsd to accept numeric owner_names"); 173 static int nfsrv_pnfsgetdsattr = 1; 174 SYSCTL_INT(_vfs_nfsd, OID_AUTO, pnfsgetdsattr, CTLFLAG_RW, 175 &nfsrv_pnfsgetdsattr, 0, "When set getattr gets DS attributes via RPC"); 176 177 /* 178 * nfsrv_dsdirsize can only be increased and only when the nfsd threads are 179 * not running. 180 * The dsN subdirectories for the increased values must have been created 181 * on all DS servers before this increase is done. 182 */ 183 u_int nfsrv_dsdirsize = 20; 184 static int 185 sysctl_dsdirsize(SYSCTL_HANDLER_ARGS) 186 { 187 int error, newdsdirsize; 188 189 newdsdirsize = nfsrv_dsdirsize; 190 error = sysctl_handle_int(oidp, &newdsdirsize, 0, req); 191 if (error != 0 || req->newptr == NULL) 192 return (error); 193 if (newdsdirsize <= nfsrv_dsdirsize || newdsdirsize > 10000 || 194 newnfs_numnfsd != 0) 195 return (EINVAL); 196 nfsrv_dsdirsize = newdsdirsize; 197 return (0); 198 } 199 SYSCTL_PROC(_vfs_nfsd, OID_AUTO, dsdirsize, 200 CTLTYPE_UINT | CTLFLAG_MPSAFE | CTLFLAG_RW, 0, sizeof(nfsrv_dsdirsize), 201 sysctl_dsdirsize, "IU", "Number of dsN subdirs on the DS servers"); 202 203 /* 204 * nfs_srvmaxio can only be increased and only when the nfsd threads are 205 * not running. The setting must be a power of 2, with the current limit of 206 * 1Mbyte. 207 */ 208 static int 209 sysctl_srvmaxio(SYSCTL_HANDLER_ARGS) 210 { 211 int error; 212 u_int newsrvmaxio; 213 uint64_t tval; 214 215 newsrvmaxio = nfs_srvmaxio; 216 error = sysctl_handle_int(oidp, &newsrvmaxio, 0, req); 217 if (error != 0 || req->newptr == NULL) 218 return (error); 219 if (newsrvmaxio == nfs_srvmaxio) 220 return (0); 221 if (newsrvmaxio < nfs_srvmaxio) { 222 printf("nfsd: vfs.nfsd.srvmaxio can only be increased\n"); 223 return (EINVAL); 224 } 225 if (newsrvmaxio > 1048576) { 226 printf("nfsd: vfs.nfsd.srvmaxio cannot be > 1Mbyte\n"); 227 return (EINVAL); 228 } 229 if ((newsrvmaxio & (newsrvmaxio - 1)) != 0) { 230 printf("nfsd: vfs.nfsd.srvmaxio must be a power of 2\n"); 231 return (EINVAL); 232 } 233 234 /* 235 * Check that kern.ipc.maxsockbuf is large enough for 236 * newsrviomax, given the setting of vfs.nfs.bufpackets. 237 */ 238 if ((newsrvmaxio + NFS_MAXXDR) * nfs_bufpackets > 239 sb_max_adj) { 240 /* 241 * Suggest vfs.nfs.bufpackets * maximum RPC message for 242 * sb_max_adj. 243 */ 244 tval = (newsrvmaxio + NFS_MAXXDR) * nfs_bufpackets; 245 246 /* 247 * Convert suggested sb_max_adj value to a suggested 248 * sb_max value, which is what is set via kern.ipc.maxsockbuf. 249 * Perform the inverse calculation of (from uipc_sockbuf.c): 250 * sb_max_adj = (u_quad_t)sb_max * MCLBYTES / 251 * (MSIZE + MCLBYTES); 252 * XXX If the calculation of sb_max_adj from sb_max changes, 253 * this calculation must be changed as well. 254 */ 255 tval *= (MSIZE + MCLBYTES); /* Brackets for readability. */ 256 tval += MCLBYTES - 1; /* Round up divide. */ 257 tval /= MCLBYTES; 258 printf("nfsd: set kern.ipc.maxsockbuf to a minimum of " 259 "%ju to support %ubyte NFS I/O\n", (uintmax_t)tval, 260 newsrvmaxio); 261 return (EINVAL); 262 } 263 264 NFSD_LOCK(); 265 if (newnfs_numnfsd != 0) { 266 NFSD_UNLOCK(); 267 printf("nfsd: cannot set vfs.nfsd.srvmaxio when nfsd " 268 "threads are running\n"); 269 return (EINVAL); 270 } 271 272 273 nfs_srvmaxio = newsrvmaxio; 274 NFSD_UNLOCK(); 275 return (0); 276 } 277 SYSCTL_PROC(_vfs_nfsd, OID_AUTO, srvmaxio, 278 CTLTYPE_UINT | CTLFLAG_MPSAFE | CTLFLAG_RW, NULL, 0, 279 sysctl_srvmaxio, "IU", "Maximum I/O size in bytes"); 280 281 #define MAX_REORDERED_RPC 16 282 #define NUM_HEURISTIC 1031 283 #define NHUSE_INIT 64 284 #define NHUSE_INC 16 285 #define NHUSE_MAX 2048 286 287 static struct nfsheur { 288 struct vnode *nh_vp; /* vp to match (unreferenced pointer) */ 289 off_t nh_nextoff; /* next offset for sequential detection */ 290 int nh_use; /* use count for selection */ 291 int nh_seqcount; /* heuristic */ 292 } nfsheur[NUM_HEURISTIC]; 293 294 /* 295 * Heuristic to detect sequential operation. 296 */ 297 static struct nfsheur * 298 nfsrv_sequential_heuristic(struct uio *uio, struct vnode *vp) 299 { 300 struct nfsheur *nh; 301 int hi, try; 302 303 /* Locate best candidate. */ 304 try = 32; 305 hi = ((int)(vm_offset_t)vp / sizeof(struct vnode)) % NUM_HEURISTIC; 306 nh = &nfsheur[hi]; 307 while (try--) { 308 if (nfsheur[hi].nh_vp == vp) { 309 nh = &nfsheur[hi]; 310 break; 311 } 312 if (nfsheur[hi].nh_use > 0) 313 --nfsheur[hi].nh_use; 314 hi = (hi + 1) % NUM_HEURISTIC; 315 if (nfsheur[hi].nh_use < nh->nh_use) 316 nh = &nfsheur[hi]; 317 } 318 319 /* Initialize hint if this is a new file. */ 320 if (nh->nh_vp != vp) { 321 nh->nh_vp = vp; 322 nh->nh_nextoff = uio->uio_offset; 323 nh->nh_use = NHUSE_INIT; 324 if (uio->uio_offset == 0) 325 nh->nh_seqcount = 4; 326 else 327 nh->nh_seqcount = 1; 328 } 329 330 /* Calculate heuristic. */ 331 if ((uio->uio_offset == 0 && nh->nh_seqcount > 0) || 332 uio->uio_offset == nh->nh_nextoff) { 333 /* See comments in vfs_vnops.c:sequential_heuristic(). */ 334 nh->nh_seqcount += howmany(uio->uio_resid, 16384); 335 if (nh->nh_seqcount > IO_SEQMAX) 336 nh->nh_seqcount = IO_SEQMAX; 337 } else if (qabs(uio->uio_offset - nh->nh_nextoff) <= MAX_REORDERED_RPC * 338 imax(vp->v_mount->mnt_stat.f_iosize, uio->uio_resid)) { 339 /* Probably a reordered RPC, leave seqcount alone. */ 340 } else if (nh->nh_seqcount > 1) { 341 nh->nh_seqcount /= 2; 342 } else { 343 nh->nh_seqcount = 0; 344 } 345 nh->nh_use += NHUSE_INC; 346 if (nh->nh_use > NHUSE_MAX) 347 nh->nh_use = NHUSE_MAX; 348 return (nh); 349 } 350 351 /* 352 * Get attributes into nfsvattr structure. 353 */ 354 int 355 nfsvno_getattr(struct vnode *vp, struct nfsvattr *nvap, 356 struct nfsrv_descript *nd, struct thread *p, int vpislocked, 357 nfsattrbit_t *attrbitp) 358 { 359 int error, gotattr, lockedit = 0; 360 struct nfsvattr na; 361 362 if (vpislocked == 0) { 363 /* 364 * When vpislocked == 0, the vnode is either exclusively 365 * locked by this thread or not locked by this thread. 366 * As such, shared lock it, if not exclusively locked. 367 */ 368 if (NFSVOPISLOCKED(vp) != LK_EXCLUSIVE) { 369 lockedit = 1; 370 NFSVOPLOCK(vp, LK_SHARED | LK_RETRY); 371 } 372 } 373 374 /* 375 * Acquire the Change, Size, TimeAccess, TimeModify and SpaceUsed 376 * attributes, as required. 377 * This needs to be done for regular files if: 378 * - non-NFSv4 RPCs or 379 * - when attrbitp == NULL or 380 * - an NFSv4 RPC with any of the above attributes in attrbitp. 381 * A return of 0 for nfsrv_proxyds() indicates that it has acquired 382 * these attributes. nfsrv_proxyds() will return an error if the 383 * server is not a pNFS one. 384 */ 385 gotattr = 0; 386 if (vp->v_type == VREG && nfsrv_devidcnt > 0 && (attrbitp == NULL || 387 (nd->nd_flag & ND_NFSV4) == 0 || 388 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_CHANGE) || 389 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_SIZE) || 390 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_TIMEACCESS) || 391 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_TIMEMODIFY) || 392 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_SPACEUSED))) { 393 error = nfsrv_proxyds(vp, 0, 0, nd->nd_cred, p, 394 NFSPROC_GETATTR, NULL, NULL, NULL, &na, NULL, NULL, 0, 395 NULL); 396 if (error == 0) 397 gotattr = 1; 398 } 399 400 error = VOP_GETATTR(vp, &nvap->na_vattr, nd->nd_cred); 401 if (lockedit != 0) 402 NFSVOPUNLOCK(vp); 403 404 /* 405 * If we got the Change, Size and Modify Time from the DS, 406 * replace them. 407 */ 408 if (gotattr != 0) { 409 nvap->na_atime = na.na_atime; 410 nvap->na_mtime = na.na_mtime; 411 nvap->na_filerev = na.na_filerev; 412 nvap->na_size = na.na_size; 413 nvap->na_bytes = na.na_bytes; 414 } 415 NFSD_DEBUG(4, "nfsvno_getattr: gotattr=%d err=%d chg=%ju\n", gotattr, 416 error, (uintmax_t)na.na_filerev); 417 418 NFSEXITCODE(error); 419 return (error); 420 } 421 422 /* 423 * Get a file handle for a vnode. 424 */ 425 int 426 nfsvno_getfh(struct vnode *vp, fhandle_t *fhp, struct thread *p) 427 { 428 int error; 429 430 NFSBZERO((caddr_t)fhp, sizeof(fhandle_t)); 431 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; 432 error = VOP_VPTOFH(vp, &fhp->fh_fid); 433 434 NFSEXITCODE(error); 435 return (error); 436 } 437 438 /* 439 * Perform access checking for vnodes obtained from file handles that would 440 * refer to files already opened by a Unix client. You cannot just use 441 * vn_writechk() and VOP_ACCESSX() for two reasons. 442 * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write 443 * case. 444 * 2 - The owner is to be given access irrespective of mode bits for some 445 * operations, so that processes that chmod after opening a file don't 446 * break. 447 */ 448 int 449 nfsvno_accchk(struct vnode *vp, accmode_t accmode, struct ucred *cred, 450 struct nfsexstuff *exp, struct thread *p, int override, int vpislocked, 451 u_int32_t *supportedtypep) 452 { 453 struct vattr vattr; 454 int error = 0, getret = 0; 455 456 if (vpislocked == 0) { 457 if (NFSVOPLOCK(vp, LK_SHARED) != 0) { 458 error = EPERM; 459 goto out; 460 } 461 } 462 if (accmode & VWRITE) { 463 /* Just vn_writechk() changed to check rdonly */ 464 /* 465 * Disallow write attempts on read-only file systems; 466 * unless the file is a socket or a block or character 467 * device resident on the file system. 468 */ 469 if (NFSVNO_EXRDONLY(exp) || 470 (vp->v_mount->mnt_flag & MNT_RDONLY)) { 471 switch (vp->v_type) { 472 case VREG: 473 case VDIR: 474 case VLNK: 475 error = EROFS; 476 default: 477 break; 478 } 479 } 480 /* 481 * If there's shared text associated with 482 * the inode, try to free it up once. If 483 * we fail, we can't allow writing. 484 */ 485 if (VOP_IS_TEXT(vp) && error == 0) 486 error = ETXTBSY; 487 } 488 if (error != 0) { 489 if (vpislocked == 0) 490 NFSVOPUNLOCK(vp); 491 goto out; 492 } 493 494 /* 495 * Should the override still be applied when ACLs are enabled? 496 */ 497 error = VOP_ACCESSX(vp, accmode, cred, p); 498 if (error != 0 && (accmode & (VDELETE | VDELETE_CHILD))) { 499 /* 500 * Try again with VEXPLICIT_DENY, to see if the test for 501 * deletion is supported. 502 */ 503 error = VOP_ACCESSX(vp, accmode | VEXPLICIT_DENY, cred, p); 504 if (error == 0) { 505 if (vp->v_type == VDIR) { 506 accmode &= ~(VDELETE | VDELETE_CHILD); 507 accmode |= VWRITE; 508 error = VOP_ACCESSX(vp, accmode, cred, p); 509 } else if (supportedtypep != NULL) { 510 *supportedtypep &= ~NFSACCESS_DELETE; 511 } 512 } 513 } 514 515 /* 516 * Allow certain operations for the owner (reads and writes 517 * on files that are already open). 518 */ 519 if (override != NFSACCCHK_NOOVERRIDE && 520 (error == EPERM || error == EACCES)) { 521 if (cred->cr_uid == 0 && (override & NFSACCCHK_ALLOWROOT)) 522 error = 0; 523 else if (override & NFSACCCHK_ALLOWOWNER) { 524 getret = VOP_GETATTR(vp, &vattr, cred); 525 if (getret == 0 && cred->cr_uid == vattr.va_uid) 526 error = 0; 527 } 528 } 529 if (vpislocked == 0) 530 NFSVOPUNLOCK(vp); 531 532 out: 533 NFSEXITCODE(error); 534 return (error); 535 } 536 537 /* 538 * Set attribute(s) vnop. 539 */ 540 int 541 nfsvno_setattr(struct vnode *vp, struct nfsvattr *nvap, struct ucred *cred, 542 struct thread *p, struct nfsexstuff *exp) 543 { 544 u_quad_t savsize = 0; 545 int error, savedit; 546 time_t savbtime; 547 548 /* 549 * If this is an exported file system and a pNFS service is running, 550 * don't VOP_SETATTR() of size for the MDS file system. 551 */ 552 savedit = 0; 553 error = 0; 554 if (vp->v_type == VREG && (vp->v_mount->mnt_flag & MNT_EXPORTED) != 0 && 555 nfsrv_devidcnt != 0 && nvap->na_vattr.va_size != VNOVAL && 556 nvap->na_vattr.va_size > 0) { 557 savsize = nvap->na_vattr.va_size; 558 nvap->na_vattr.va_size = VNOVAL; 559 if (nvap->na_vattr.va_uid != (uid_t)VNOVAL || 560 nvap->na_vattr.va_gid != (gid_t)VNOVAL || 561 nvap->na_vattr.va_mode != (mode_t)VNOVAL || 562 nvap->na_vattr.va_atime.tv_sec != VNOVAL || 563 nvap->na_vattr.va_mtime.tv_sec != VNOVAL) 564 savedit = 1; 565 else 566 savedit = 2; 567 } 568 if (savedit != 2) 569 error = VOP_SETATTR(vp, &nvap->na_vattr, cred); 570 if (savedit != 0) 571 nvap->na_vattr.va_size = savsize; 572 if (error == 0 && (nvap->na_vattr.va_uid != (uid_t)VNOVAL || 573 nvap->na_vattr.va_gid != (gid_t)VNOVAL || 574 nvap->na_vattr.va_size != VNOVAL || 575 nvap->na_vattr.va_mode != (mode_t)VNOVAL || 576 nvap->na_vattr.va_atime.tv_sec != VNOVAL || 577 nvap->na_vattr.va_mtime.tv_sec != VNOVAL)) { 578 /* Never modify birthtime on a DS file. */ 579 savbtime = nvap->na_vattr.va_birthtime.tv_sec; 580 nvap->na_vattr.va_birthtime.tv_sec = VNOVAL; 581 /* For a pNFS server, set the attributes on the DS file. */ 582 error = nfsrv_proxyds(vp, 0, 0, cred, p, NFSPROC_SETATTR, 583 NULL, NULL, NULL, nvap, NULL, NULL, 0, NULL); 584 nvap->na_vattr.va_birthtime.tv_sec = savbtime; 585 if (error == ENOENT) 586 error = 0; 587 } 588 NFSEXITCODE(error); 589 return (error); 590 } 591 592 /* 593 * Set up nameidata for a lookup() call and do it. 594 */ 595 int 596 nfsvno_namei(struct nfsrv_descript *nd, struct nameidata *ndp, 597 struct vnode *dp, int islocked, struct nfsexstuff *exp, 598 struct vnode **retdirp) 599 { 600 struct componentname *cnp = &ndp->ni_cnd; 601 int i; 602 struct iovec aiov; 603 struct uio auio; 604 int lockleaf = (cnp->cn_flags & LOCKLEAF) != 0, linklen; 605 int error = 0; 606 char *cp; 607 608 *retdirp = NULL; 609 cnp->cn_nameptr = cnp->cn_pnbuf; 610 ndp->ni_lcf = 0; 611 /* 612 * Extract and set starting directory. 613 */ 614 if (dp->v_type != VDIR) { 615 if (islocked) 616 vput(dp); 617 else 618 vrele(dp); 619 nfsvno_relpathbuf(ndp); 620 error = ENOTDIR; 621 goto out1; 622 } 623 if (islocked) 624 NFSVOPUNLOCK(dp); 625 VREF(dp); 626 *retdirp = dp; 627 if (NFSVNO_EXRDONLY(exp)) 628 cnp->cn_flags |= RDONLY; 629 ndp->ni_segflg = UIO_SYSSPACE; 630 631 if (nd->nd_flag & ND_PUBLOOKUP) { 632 ndp->ni_loopcnt = 0; 633 if (cnp->cn_pnbuf[0] == '/') { 634 vrele(dp); 635 /* 636 * Check for degenerate pathnames here, since lookup() 637 * panics on them. 638 */ 639 for (i = 1; i < ndp->ni_pathlen; i++) 640 if (cnp->cn_pnbuf[i] != '/') 641 break; 642 if (i == ndp->ni_pathlen) { 643 error = NFSERR_ACCES; 644 goto out; 645 } 646 dp = rootvnode; 647 VREF(dp); 648 } 649 } else if ((nfsrv_enable_crossmntpt == 0 && NFSVNO_EXPORTED(exp)) || 650 (nd->nd_flag & ND_NFSV4) == 0) { 651 /* 652 * Only cross mount points for NFSv4 when doing a 653 * mount while traversing the file system above 654 * the mount point, unless nfsrv_enable_crossmntpt is set. 655 */ 656 cnp->cn_flags |= NOCROSSMOUNT; 657 } 658 659 /* 660 * Initialize for scan, set ni_startdir and bump ref on dp again 661 * because lookup() will dereference ni_startdir. 662 */ 663 664 ndp->ni_startdir = dp; 665 ndp->ni_rootdir = rootvnode; 666 ndp->ni_topdir = NULL; 667 668 if (!lockleaf) 669 cnp->cn_flags |= LOCKLEAF; 670 for (;;) { 671 cnp->cn_nameptr = cnp->cn_pnbuf; 672 /* 673 * Call lookup() to do the real work. If an error occurs, 674 * ndp->ni_vp and ni_dvp are left uninitialized or NULL and 675 * we do not have to dereference anything before returning. 676 * In either case ni_startdir will be dereferenced and NULLed 677 * out. 678 */ 679 error = lookup(ndp); 680 if (error) 681 break; 682 683 /* 684 * Check for encountering a symbolic link. Trivial 685 * termination occurs if no symlink encountered. 686 */ 687 if ((cnp->cn_flags & ISSYMLINK) == 0) { 688 if ((cnp->cn_flags & (SAVENAME | SAVESTART)) == 0) 689 nfsvno_relpathbuf(ndp); 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 | HASBUF); 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 if ((ndp->ni_cnd.cn_flags & HASBUF) == 0) 813 panic("nfsrelpath"); 814 uma_zfree(namei_zone, ndp->ni_cnd.cn_pnbuf); 815 ndp->ni_cnd.cn_flags &= ~HASBUF; 816 } 817 818 /* 819 * Readlink vnode op into an mbuf list. 820 */ 821 int 822 nfsvno_readlink(struct vnode *vp, struct ucred *cred, int maxextsiz, 823 struct thread *p, struct mbuf **mpp, struct mbuf **mpendp, int *lenp) 824 { 825 struct iovec *iv; 826 struct uio io, *uiop = &io; 827 struct mbuf *mp, *mp3; 828 int len, tlen, error = 0; 829 830 len = NFS_MAXPATHLEN; 831 if (maxextsiz > 0) 832 uiop->uio_iovcnt = nfsrv_createiovec_extpgs(len, maxextsiz, 833 &mp3, &mp, &iv); 834 else 835 uiop->uio_iovcnt = nfsrv_createiovec(len, &mp3, &mp, &iv); 836 uiop->uio_iov = iv; 837 uiop->uio_offset = 0; 838 uiop->uio_resid = len; 839 uiop->uio_rw = UIO_READ; 840 uiop->uio_segflg = UIO_SYSSPACE; 841 uiop->uio_td = NULL; 842 error = VOP_READLINK(vp, uiop, cred); 843 free(iv, M_TEMP); 844 if (error) { 845 m_freem(mp3); 846 *lenp = 0; 847 goto out; 848 } 849 if (uiop->uio_resid > 0) { 850 len -= uiop->uio_resid; 851 tlen = NFSM_RNDUP(len); 852 if (tlen == 0) { 853 m_freem(mp3); 854 mp3 = mp = NULL; 855 } else if (tlen != NFS_MAXPATHLEN || tlen != len) 856 mp = nfsrv_adj(mp3, NFS_MAXPATHLEN - tlen, 857 tlen - len); 858 } 859 *lenp = len; 860 *mpp = mp3; 861 *mpendp = mp; 862 863 out: 864 NFSEXITCODE(error); 865 return (error); 866 } 867 868 /* 869 * Create an mbuf chain and an associated iovec that can be used to Read 870 * or Getextattr of data. 871 * Upon success, return pointers to the first and last mbufs in the chain 872 * plus the malloc'd iovec and its iovlen. 873 */ 874 static int 875 nfsrv_createiovec(int len, struct mbuf **mpp, struct mbuf **mpendp, 876 struct iovec **ivp) 877 { 878 struct mbuf *m, *m2 = NULL, *m3; 879 struct iovec *iv; 880 int i, left, siz; 881 882 left = len; 883 m3 = NULL; 884 /* 885 * Generate the mbuf list with the uio_iov ref. to it. 886 */ 887 i = 0; 888 while (left > 0) { 889 NFSMGET(m); 890 MCLGET(m, M_WAITOK); 891 m->m_len = 0; 892 siz = min(M_TRAILINGSPACE(m), left); 893 left -= siz; 894 i++; 895 if (m3) 896 m2->m_next = m; 897 else 898 m3 = m; 899 m2 = m; 900 } 901 *ivp = iv = malloc(i * sizeof (struct iovec), M_TEMP, M_WAITOK); 902 m = m3; 903 left = len; 904 i = 0; 905 while (left > 0) { 906 if (m == NULL) 907 panic("nfsrv_createiovec iov"); 908 siz = min(M_TRAILINGSPACE(m), left); 909 if (siz > 0) { 910 iv->iov_base = mtod(m, caddr_t) + m->m_len; 911 iv->iov_len = siz; 912 m->m_len += siz; 913 left -= siz; 914 iv++; 915 i++; 916 } 917 m = m->m_next; 918 } 919 *mpp = m3; 920 *mpendp = m2; 921 return (i); 922 } 923 924 /* 925 * Create an mbuf chain and an associated iovec that can be used to Read 926 * or Getextattr of data. 927 * Upon success, return pointers to the first and last mbufs in the chain 928 * plus the malloc'd iovec and its iovlen. 929 * Same as above, but creates ext_pgs mbuf(s). 930 */ 931 static int 932 nfsrv_createiovec_extpgs(int len, int maxextsiz, struct mbuf **mpp, 933 struct mbuf **mpendp, struct iovec **ivp) 934 { 935 struct mbuf *m, *m2 = NULL, *m3; 936 struct iovec *iv; 937 int i, left, pgno, siz; 938 939 left = len; 940 m3 = NULL; 941 /* 942 * Generate the mbuf list with the uio_iov ref. to it. 943 */ 944 i = 0; 945 while (left > 0) { 946 siz = min(left, maxextsiz); 947 m = mb_alloc_ext_plus_pages(siz, M_WAITOK); 948 left -= siz; 949 i += m->m_epg_npgs; 950 if (m3 != NULL) 951 m2->m_next = m; 952 else 953 m3 = m; 954 m2 = m; 955 } 956 *ivp = iv = malloc(i * sizeof (struct iovec), M_TEMP, M_WAITOK); 957 m = m3; 958 left = len; 959 i = 0; 960 pgno = 0; 961 while (left > 0) { 962 if (m == NULL) 963 panic("nfsvno_createiovec_extpgs iov"); 964 siz = min(PAGE_SIZE, left); 965 if (siz > 0) { 966 iv->iov_base = (void *)PHYS_TO_DMAP(m->m_epg_pa[pgno]); 967 iv->iov_len = siz; 968 m->m_len += siz; 969 if (pgno == m->m_epg_npgs - 1) 970 m->m_epg_last_len = siz; 971 left -= siz; 972 iv++; 973 i++; 974 pgno++; 975 } 976 if (pgno == m->m_epg_npgs && left > 0) { 977 m = m->m_next; 978 if (m == NULL) 979 panic("nfsvno_createiovec_extpgs iov"); 980 pgno = 0; 981 } 982 } 983 *mpp = m3; 984 *mpendp = m2; 985 return (i); 986 } 987 988 /* 989 * Read vnode op call into mbuf list. 990 */ 991 int 992 nfsvno_read(struct vnode *vp, off_t off, int cnt, struct ucred *cred, 993 int maxextsiz, struct thread *p, struct mbuf **mpp, 994 struct mbuf **mpendp) 995 { 996 struct mbuf *m; 997 struct iovec *iv; 998 int error = 0, len, tlen, ioflag = 0; 999 struct mbuf *m3; 1000 struct uio io, *uiop = &io; 1001 struct nfsheur *nh; 1002 1003 /* 1004 * Attempt to read from a DS file. A return of ENOENT implies 1005 * there is no DS file to read. 1006 */ 1007 error = nfsrv_proxyds(vp, off, cnt, cred, p, NFSPROC_READDS, mpp, 1008 NULL, mpendp, NULL, NULL, NULL, 0, NULL); 1009 if (error != ENOENT) 1010 return (error); 1011 1012 len = NFSM_RNDUP(cnt); 1013 if (maxextsiz > 0) 1014 uiop->uio_iovcnt = nfsrv_createiovec_extpgs(len, maxextsiz, 1015 &m3, &m, &iv); 1016 else 1017 uiop->uio_iovcnt = nfsrv_createiovec(len, &m3, &m, &iv); 1018 uiop->uio_iov = iv; 1019 uiop->uio_offset = off; 1020 uiop->uio_resid = len; 1021 uiop->uio_rw = UIO_READ; 1022 uiop->uio_segflg = UIO_SYSSPACE; 1023 uiop->uio_td = NULL; 1024 nh = nfsrv_sequential_heuristic(uiop, vp); 1025 ioflag |= nh->nh_seqcount << IO_SEQSHIFT; 1026 /* XXX KDM make this more systematic? */ 1027 nfsstatsv1.srvbytes[NFSV4OP_READ] += uiop->uio_resid; 1028 error = VOP_READ(vp, uiop, IO_NODELOCKED | ioflag, cred); 1029 free(iv, M_TEMP); 1030 if (error) { 1031 m_freem(m3); 1032 *mpp = NULL; 1033 goto out; 1034 } 1035 nh->nh_nextoff = uiop->uio_offset; 1036 tlen = len - uiop->uio_resid; 1037 cnt = cnt < tlen ? cnt : tlen; 1038 tlen = NFSM_RNDUP(cnt); 1039 if (tlen == 0) { 1040 m_freem(m3); 1041 m3 = m = NULL; 1042 } else if (len != tlen || tlen != cnt) 1043 m = nfsrv_adj(m3, len - tlen, tlen - cnt); 1044 *mpp = m3; 1045 *mpendp = m; 1046 1047 out: 1048 NFSEXITCODE(error); 1049 return (error); 1050 } 1051 1052 /* 1053 * Create the iovec for the mbuf chain passed in as an argument. 1054 * The "cp" argument is where the data starts within the first mbuf in 1055 * the chain. It returns the iovec and the iovcnt. 1056 */ 1057 static int 1058 nfsrv_createiovecw(int retlen, struct mbuf *m, char *cp, struct iovec **ivpp, 1059 int *iovcntp) 1060 { 1061 struct mbuf *mp; 1062 struct iovec *ivp; 1063 int cnt, i, len; 1064 1065 /* 1066 * Loop through the mbuf chain, counting how many mbufs are a 1067 * part of this write operation, so the iovec size is known. 1068 */ 1069 cnt = 0; 1070 len = retlen; 1071 mp = m; 1072 i = mtod(mp, caddr_t) + mp->m_len - cp; 1073 while (len > 0) { 1074 if (i > 0) { 1075 len -= i; 1076 cnt++; 1077 } 1078 mp = mp->m_next; 1079 if (!mp) { 1080 if (len > 0) 1081 return (EBADRPC); 1082 } else 1083 i = mp->m_len; 1084 } 1085 1086 /* Now, create the iovec. */ 1087 mp = m; 1088 *ivpp = ivp = malloc(cnt * sizeof (struct iovec), M_TEMP, 1089 M_WAITOK); 1090 *iovcntp = cnt; 1091 i = mtod(mp, caddr_t) + mp->m_len - cp; 1092 len = retlen; 1093 while (len > 0) { 1094 if (mp == NULL) 1095 panic("nfsrv_createiovecw"); 1096 if (i > 0) { 1097 i = min(i, len); 1098 ivp->iov_base = cp; 1099 ivp->iov_len = i; 1100 ivp++; 1101 len -= i; 1102 } 1103 mp = mp->m_next; 1104 if (mp) { 1105 i = mp->m_len; 1106 cp = mtod(mp, caddr_t); 1107 } 1108 } 1109 return (0); 1110 } 1111 1112 /* 1113 * Write vnode op from an mbuf list. 1114 */ 1115 int 1116 nfsvno_write(struct vnode *vp, off_t off, int retlen, int *stable, 1117 struct mbuf *mp, char *cp, struct ucred *cred, struct thread *p) 1118 { 1119 struct iovec *iv; 1120 int cnt, ioflags, error; 1121 struct uio io, *uiop = &io; 1122 struct nfsheur *nh; 1123 1124 /* 1125 * Attempt to write to a DS file. A return of ENOENT implies 1126 * there is no DS file to write. 1127 */ 1128 error = nfsrv_proxyds(vp, off, retlen, cred, p, NFSPROC_WRITEDS, 1129 &mp, cp, NULL, NULL, NULL, NULL, 0, NULL); 1130 if (error != ENOENT) { 1131 *stable = NFSWRITE_FILESYNC; 1132 return (error); 1133 } 1134 1135 if (*stable == NFSWRITE_UNSTABLE) 1136 ioflags = IO_NODELOCKED; 1137 else 1138 ioflags = (IO_SYNC | IO_NODELOCKED); 1139 error = nfsrv_createiovecw(retlen, mp, cp, &iv, &cnt); 1140 if (error != 0) 1141 return (error); 1142 uiop->uio_iov = iv; 1143 uiop->uio_iovcnt = cnt; 1144 uiop->uio_resid = retlen; 1145 uiop->uio_rw = UIO_WRITE; 1146 uiop->uio_segflg = UIO_SYSSPACE; 1147 NFSUIOPROC(uiop, p); 1148 uiop->uio_offset = off; 1149 nh = nfsrv_sequential_heuristic(uiop, vp); 1150 ioflags |= nh->nh_seqcount << IO_SEQSHIFT; 1151 /* XXX KDM make this more systematic? */ 1152 nfsstatsv1.srvbytes[NFSV4OP_WRITE] += uiop->uio_resid; 1153 error = VOP_WRITE(vp, uiop, ioflags, cred); 1154 if (error == 0) 1155 nh->nh_nextoff = uiop->uio_offset; 1156 free(iv, M_TEMP); 1157 1158 NFSEXITCODE(error); 1159 return (error); 1160 } 1161 1162 /* 1163 * Common code for creating a regular file (plus special files for V2). 1164 */ 1165 int 1166 nfsvno_createsub(struct nfsrv_descript *nd, struct nameidata *ndp, 1167 struct vnode **vpp, struct nfsvattr *nvap, int *exclusive_flagp, 1168 int32_t *cverf, NFSDEV_T rdev, struct nfsexstuff *exp) 1169 { 1170 u_quad_t tempsize; 1171 int error; 1172 struct thread *p = curthread; 1173 1174 error = nd->nd_repstat; 1175 if (!error && ndp->ni_vp == NULL) { 1176 if (nvap->na_type == VREG || nvap->na_type == VSOCK) { 1177 vrele(ndp->ni_startdir); 1178 error = VOP_CREATE(ndp->ni_dvp, 1179 &ndp->ni_vp, &ndp->ni_cnd, &nvap->na_vattr); 1180 /* For a pNFS server, create the data file on a DS. */ 1181 if (error == 0 && nvap->na_type == VREG) { 1182 /* 1183 * Create a data file on a DS for a pNFS server. 1184 * This function just returns if not 1185 * running a pNFS DS or the creation fails. 1186 */ 1187 nfsrv_pnfscreate(ndp->ni_vp, &nvap->na_vattr, 1188 nd->nd_cred, p); 1189 } 1190 VOP_VPUT_PAIR(ndp->ni_dvp, error == 0 ? &ndp->ni_vp : 1191 NULL, false); 1192 nfsvno_relpathbuf(ndp); 1193 if (!error) { 1194 if (*exclusive_flagp) { 1195 *exclusive_flagp = 0; 1196 NFSVNO_ATTRINIT(nvap); 1197 nvap->na_atime.tv_sec = cverf[0]; 1198 nvap->na_atime.tv_nsec = cverf[1]; 1199 error = VOP_SETATTR(ndp->ni_vp, 1200 &nvap->na_vattr, nd->nd_cred); 1201 if (error != 0) { 1202 vput(ndp->ni_vp); 1203 ndp->ni_vp = NULL; 1204 error = NFSERR_NOTSUPP; 1205 } 1206 } 1207 } 1208 /* 1209 * NFS V2 Only. nfsrvd_mknod() does this for V3. 1210 * (This implies, just get out on an error.) 1211 */ 1212 } else if (nvap->na_type == VCHR || nvap->na_type == VBLK || 1213 nvap->na_type == VFIFO) { 1214 if (nvap->na_type == VCHR && rdev == 0xffffffff) 1215 nvap->na_type = VFIFO; 1216 if (nvap->na_type != VFIFO && 1217 (error = priv_check_cred(nd->nd_cred, PRIV_VFS_MKNOD_DEV))) { 1218 vrele(ndp->ni_startdir); 1219 nfsvno_relpathbuf(ndp); 1220 vput(ndp->ni_dvp); 1221 goto out; 1222 } 1223 nvap->na_rdev = rdev; 1224 error = VOP_MKNOD(ndp->ni_dvp, &ndp->ni_vp, 1225 &ndp->ni_cnd, &nvap->na_vattr); 1226 VOP_VPUT_PAIR(ndp->ni_dvp, error == 0 ? &ndp->ni_vp : 1227 NULL, false); 1228 nfsvno_relpathbuf(ndp); 1229 vrele(ndp->ni_startdir); 1230 if (error) 1231 goto out; 1232 } else { 1233 vrele(ndp->ni_startdir); 1234 nfsvno_relpathbuf(ndp); 1235 vput(ndp->ni_dvp); 1236 error = ENXIO; 1237 goto out; 1238 } 1239 *vpp = ndp->ni_vp; 1240 } else { 1241 /* 1242 * Handle cases where error is already set and/or 1243 * the file exists. 1244 * 1 - clean up the lookup 1245 * 2 - iff !error and na_size set, truncate it 1246 */ 1247 vrele(ndp->ni_startdir); 1248 nfsvno_relpathbuf(ndp); 1249 *vpp = ndp->ni_vp; 1250 if (ndp->ni_dvp == *vpp) 1251 vrele(ndp->ni_dvp); 1252 else 1253 vput(ndp->ni_dvp); 1254 if (!error && nvap->na_size != VNOVAL) { 1255 error = nfsvno_accchk(*vpp, VWRITE, 1256 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 1257 NFSACCCHK_VPISLOCKED, NULL); 1258 if (!error) { 1259 tempsize = nvap->na_size; 1260 NFSVNO_ATTRINIT(nvap); 1261 nvap->na_size = tempsize; 1262 error = VOP_SETATTR(*vpp, 1263 &nvap->na_vattr, nd->nd_cred); 1264 } 1265 } 1266 if (error) 1267 vput(*vpp); 1268 } 1269 1270 out: 1271 NFSEXITCODE(error); 1272 return (error); 1273 } 1274 1275 /* 1276 * Do a mknod vnode op. 1277 */ 1278 int 1279 nfsvno_mknod(struct nameidata *ndp, struct nfsvattr *nvap, struct ucred *cred, 1280 struct thread *p) 1281 { 1282 int error = 0; 1283 enum vtype vtyp; 1284 1285 vtyp = nvap->na_type; 1286 /* 1287 * Iff doesn't exist, create it. 1288 */ 1289 if (ndp->ni_vp) { 1290 vrele(ndp->ni_startdir); 1291 nfsvno_relpathbuf(ndp); 1292 vput(ndp->ni_dvp); 1293 vrele(ndp->ni_vp); 1294 error = EEXIST; 1295 goto out; 1296 } 1297 if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { 1298 vrele(ndp->ni_startdir); 1299 nfsvno_relpathbuf(ndp); 1300 vput(ndp->ni_dvp); 1301 error = NFSERR_BADTYPE; 1302 goto out; 1303 } 1304 if (vtyp == VSOCK) { 1305 vrele(ndp->ni_startdir); 1306 error = VOP_CREATE(ndp->ni_dvp, &ndp->ni_vp, 1307 &ndp->ni_cnd, &nvap->na_vattr); 1308 VOP_VPUT_PAIR(ndp->ni_dvp, error == 0 ? &ndp->ni_vp : NULL, 1309 false); 1310 nfsvno_relpathbuf(ndp); 1311 } else { 1312 if (nvap->na_type != VFIFO && 1313 (error = priv_check_cred(cred, PRIV_VFS_MKNOD_DEV))) { 1314 vrele(ndp->ni_startdir); 1315 nfsvno_relpathbuf(ndp); 1316 vput(ndp->ni_dvp); 1317 goto out; 1318 } 1319 error = VOP_MKNOD(ndp->ni_dvp, &ndp->ni_vp, 1320 &ndp->ni_cnd, &nvap->na_vattr); 1321 VOP_VPUT_PAIR(ndp->ni_dvp, error == 0 ? &ndp->ni_vp : NULL, 1322 false); 1323 nfsvno_relpathbuf(ndp); 1324 vrele(ndp->ni_startdir); 1325 /* 1326 * Since VOP_MKNOD returns the ni_vp, I can't 1327 * see any reason to do the lookup. 1328 */ 1329 } 1330 1331 out: 1332 NFSEXITCODE(error); 1333 return (error); 1334 } 1335 1336 /* 1337 * Mkdir vnode op. 1338 */ 1339 int 1340 nfsvno_mkdir(struct nameidata *ndp, struct nfsvattr *nvap, uid_t saved_uid, 1341 struct ucred *cred, struct thread *p, struct nfsexstuff *exp) 1342 { 1343 int error = 0; 1344 1345 if (ndp->ni_vp != NULL) { 1346 if (ndp->ni_dvp == ndp->ni_vp) 1347 vrele(ndp->ni_dvp); 1348 else 1349 vput(ndp->ni_dvp); 1350 vrele(ndp->ni_vp); 1351 nfsvno_relpathbuf(ndp); 1352 error = EEXIST; 1353 goto out; 1354 } 1355 error = VOP_MKDIR(ndp->ni_dvp, &ndp->ni_vp, &ndp->ni_cnd, 1356 &nvap->na_vattr); 1357 VOP_VPUT_PAIR(ndp->ni_dvp, error == 0 ? &ndp->ni_vp : NULL, false); 1358 nfsvno_relpathbuf(ndp); 1359 1360 out: 1361 NFSEXITCODE(error); 1362 return (error); 1363 } 1364 1365 /* 1366 * symlink vnode op. 1367 */ 1368 int 1369 nfsvno_symlink(struct nameidata *ndp, struct nfsvattr *nvap, char *pathcp, 1370 int pathlen, int not_v2, uid_t saved_uid, struct ucred *cred, struct thread *p, 1371 struct nfsexstuff *exp) 1372 { 1373 int error = 0; 1374 1375 if (ndp->ni_vp) { 1376 vrele(ndp->ni_startdir); 1377 nfsvno_relpathbuf(ndp); 1378 if (ndp->ni_dvp == ndp->ni_vp) 1379 vrele(ndp->ni_dvp); 1380 else 1381 vput(ndp->ni_dvp); 1382 vrele(ndp->ni_vp); 1383 error = EEXIST; 1384 goto out; 1385 } 1386 1387 error = VOP_SYMLINK(ndp->ni_dvp, &ndp->ni_vp, &ndp->ni_cnd, 1388 &nvap->na_vattr, pathcp); 1389 /* 1390 * Although FreeBSD still had the lookup code in 1391 * it for 7/current, there doesn't seem to be any 1392 * point, since VOP_SYMLINK() returns the ni_vp. 1393 * Just vput it for v2. 1394 */ 1395 VOP_VPUT_PAIR(ndp->ni_dvp, &ndp->ni_vp, !not_v2 && error == 0); 1396 vrele(ndp->ni_startdir); 1397 nfsvno_relpathbuf(ndp); 1398 1399 out: 1400 NFSEXITCODE(error); 1401 return (error); 1402 } 1403 1404 /* 1405 * Parse symbolic link arguments. 1406 * This function has an ugly side effect. It will malloc() an area for 1407 * the symlink and set iov_base to point to it, only if it succeeds. 1408 * So, if it returns with uiop->uio_iov->iov_base != NULL, that must 1409 * be FREE'd later. 1410 */ 1411 int 1412 nfsvno_getsymlink(struct nfsrv_descript *nd, struct nfsvattr *nvap, 1413 struct thread *p, char **pathcpp, int *lenp) 1414 { 1415 u_int32_t *tl; 1416 char *pathcp = NULL; 1417 int error = 0, len; 1418 struct nfsv2_sattr *sp; 1419 1420 *pathcpp = NULL; 1421 *lenp = 0; 1422 if ((nd->nd_flag & ND_NFSV3) && 1423 (error = nfsrv_sattr(nd, NULL, nvap, NULL, NULL, p))) 1424 goto nfsmout; 1425 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 1426 len = fxdr_unsigned(int, *tl); 1427 if (len > NFS_MAXPATHLEN || len <= 0) { 1428 error = EBADRPC; 1429 goto nfsmout; 1430 } 1431 pathcp = malloc(len + 1, M_TEMP, M_WAITOK); 1432 error = nfsrv_mtostr(nd, pathcp, len); 1433 if (error) 1434 goto nfsmout; 1435 if (nd->nd_flag & ND_NFSV2) { 1436 NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1437 nvap->na_mode = fxdr_unsigned(u_int16_t, sp->sa_mode); 1438 } 1439 *pathcpp = pathcp; 1440 *lenp = len; 1441 NFSEXITCODE2(0, nd); 1442 return (0); 1443 nfsmout: 1444 if (pathcp) 1445 free(pathcp, M_TEMP); 1446 NFSEXITCODE2(error, nd); 1447 return (error); 1448 } 1449 1450 /* 1451 * Remove a non-directory object. 1452 */ 1453 int 1454 nfsvno_removesub(struct nameidata *ndp, int is_v4, struct ucred *cred, 1455 struct thread *p, struct nfsexstuff *exp) 1456 { 1457 struct vnode *vp, *dsdvp[NFSDEV_MAXMIRRORS]; 1458 int error = 0, mirrorcnt; 1459 char fname[PNFS_FILENAME_LEN + 1]; 1460 fhandle_t fh; 1461 1462 vp = ndp->ni_vp; 1463 dsdvp[0] = NULL; 1464 if (vp->v_type == VDIR) 1465 error = NFSERR_ISDIR; 1466 else if (is_v4) 1467 error = nfsrv_checkremove(vp, 1, NULL, (nfsquad_t)((u_quad_t)0), 1468 p); 1469 if (error == 0) 1470 nfsrv_pnfsremovesetup(vp, p, dsdvp, &mirrorcnt, fname, &fh); 1471 if (!error) 1472 error = VOP_REMOVE(ndp->ni_dvp, vp, &ndp->ni_cnd); 1473 if (error == 0 && dsdvp[0] != NULL) 1474 nfsrv_pnfsremove(dsdvp, mirrorcnt, fname, &fh, p); 1475 if (ndp->ni_dvp == vp) 1476 vrele(ndp->ni_dvp); 1477 else 1478 vput(ndp->ni_dvp); 1479 vput(vp); 1480 if ((ndp->ni_cnd.cn_flags & SAVENAME) != 0) 1481 nfsvno_relpathbuf(ndp); 1482 NFSEXITCODE(error); 1483 return (error); 1484 } 1485 1486 /* 1487 * Remove a directory. 1488 */ 1489 int 1490 nfsvno_rmdirsub(struct nameidata *ndp, int is_v4, struct ucred *cred, 1491 struct thread *p, struct nfsexstuff *exp) 1492 { 1493 struct vnode *vp; 1494 int error = 0; 1495 1496 vp = ndp->ni_vp; 1497 if (vp->v_type != VDIR) { 1498 error = ENOTDIR; 1499 goto out; 1500 } 1501 /* 1502 * No rmdir "." please. 1503 */ 1504 if (ndp->ni_dvp == vp) { 1505 error = EINVAL; 1506 goto out; 1507 } 1508 /* 1509 * The root of a mounted filesystem cannot be deleted. 1510 */ 1511 if (vp->v_vflag & VV_ROOT) 1512 error = EBUSY; 1513 out: 1514 if (!error) 1515 error = VOP_RMDIR(ndp->ni_dvp, vp, &ndp->ni_cnd); 1516 if (ndp->ni_dvp == vp) 1517 vrele(ndp->ni_dvp); 1518 else 1519 vput(ndp->ni_dvp); 1520 vput(vp); 1521 if ((ndp->ni_cnd.cn_flags & SAVENAME) != 0) 1522 nfsvno_relpathbuf(ndp); 1523 NFSEXITCODE(error); 1524 return (error); 1525 } 1526 1527 /* 1528 * Rename vnode op. 1529 */ 1530 int 1531 nfsvno_rename(struct nameidata *fromndp, struct nameidata *tondp, 1532 u_int32_t ndstat, u_int32_t ndflag, struct ucred *cred, struct thread *p) 1533 { 1534 struct vnode *fvp, *tvp, *tdvp, *dsdvp[NFSDEV_MAXMIRRORS]; 1535 int error = 0, mirrorcnt; 1536 char fname[PNFS_FILENAME_LEN + 1]; 1537 fhandle_t fh; 1538 1539 dsdvp[0] = NULL; 1540 fvp = fromndp->ni_vp; 1541 if (ndstat) { 1542 vrele(fromndp->ni_dvp); 1543 vrele(fvp); 1544 error = ndstat; 1545 goto out1; 1546 } 1547 tdvp = tondp->ni_dvp; 1548 tvp = tondp->ni_vp; 1549 if (tvp != NULL) { 1550 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 1551 error = (ndflag & ND_NFSV2) ? EISDIR : EEXIST; 1552 goto out; 1553 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 1554 error = (ndflag & ND_NFSV2) ? ENOTDIR : EEXIST; 1555 goto out; 1556 } 1557 if (tvp->v_type == VDIR && tvp->v_mountedhere) { 1558 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1559 goto out; 1560 } 1561 1562 /* 1563 * A rename to '.' or '..' results in a prematurely 1564 * unlocked vnode on FreeBSD5, so I'm just going to fail that 1565 * here. 1566 */ 1567 if ((tondp->ni_cnd.cn_namelen == 1 && 1568 tondp->ni_cnd.cn_nameptr[0] == '.') || 1569 (tondp->ni_cnd.cn_namelen == 2 && 1570 tondp->ni_cnd.cn_nameptr[0] == '.' && 1571 tondp->ni_cnd.cn_nameptr[1] == '.')) { 1572 error = EINVAL; 1573 goto out; 1574 } 1575 } 1576 if (fvp->v_type == VDIR && fvp->v_mountedhere) { 1577 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1578 goto out; 1579 } 1580 if (fvp->v_mount != tdvp->v_mount) { 1581 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EXDEV; 1582 goto out; 1583 } 1584 if (fvp == tdvp) { 1585 error = (ndflag & ND_NFSV2) ? ENOTEMPTY : EINVAL; 1586 goto out; 1587 } 1588 if (fvp == tvp) { 1589 /* 1590 * If source and destination are the same, there is nothing to 1591 * do. Set error to -1 to indicate this. 1592 */ 1593 error = -1; 1594 goto out; 1595 } 1596 if (ndflag & ND_NFSV4) { 1597 if (NFSVOPLOCK(fvp, LK_EXCLUSIVE) == 0) { 1598 error = nfsrv_checkremove(fvp, 0, NULL, 1599 (nfsquad_t)((u_quad_t)0), p); 1600 NFSVOPUNLOCK(fvp); 1601 } else 1602 error = EPERM; 1603 if (tvp && !error) 1604 error = nfsrv_checkremove(tvp, 1, NULL, 1605 (nfsquad_t)((u_quad_t)0), p); 1606 } else { 1607 /* 1608 * For NFSv2 and NFSv3, try to get rid of the delegation, so 1609 * that the NFSv4 client won't be confused by the rename. 1610 * Since nfsd_recalldelegation() can only be called on an 1611 * unlocked vnode at this point and fvp is the file that will 1612 * still exist after the rename, just do fvp. 1613 */ 1614 nfsd_recalldelegation(fvp, p); 1615 } 1616 if (error == 0 && tvp != NULL) { 1617 nfsrv_pnfsremovesetup(tvp, p, dsdvp, &mirrorcnt, fname, &fh); 1618 NFSD_DEBUG(4, "nfsvno_rename: pnfsremovesetup" 1619 " dsdvp=%p\n", dsdvp[0]); 1620 } 1621 out: 1622 if (!error) { 1623 error = VOP_RENAME(fromndp->ni_dvp, fromndp->ni_vp, 1624 &fromndp->ni_cnd, tondp->ni_dvp, tondp->ni_vp, 1625 &tondp->ni_cnd); 1626 } else { 1627 if (tdvp == tvp) 1628 vrele(tdvp); 1629 else 1630 vput(tdvp); 1631 if (tvp) 1632 vput(tvp); 1633 vrele(fromndp->ni_dvp); 1634 vrele(fvp); 1635 if (error == -1) 1636 error = 0; 1637 } 1638 1639 /* 1640 * If dsdvp[0] != NULL, it was set up by nfsrv_pnfsremovesetup() and 1641 * if the rename succeeded, the DS file for the tvp needs to be 1642 * removed. 1643 */ 1644 if (error == 0 && dsdvp[0] != NULL) { 1645 nfsrv_pnfsremove(dsdvp, mirrorcnt, fname, &fh, p); 1646 NFSD_DEBUG(4, "nfsvno_rename: pnfsremove\n"); 1647 } 1648 1649 vrele(tondp->ni_startdir); 1650 nfsvno_relpathbuf(tondp); 1651 out1: 1652 vrele(fromndp->ni_startdir); 1653 nfsvno_relpathbuf(fromndp); 1654 NFSEXITCODE(error); 1655 return (error); 1656 } 1657 1658 /* 1659 * Link vnode op. 1660 */ 1661 int 1662 nfsvno_link(struct nameidata *ndp, struct vnode *vp, struct ucred *cred, 1663 struct thread *p, struct nfsexstuff *exp) 1664 { 1665 struct vnode *xp; 1666 int error = 0; 1667 1668 xp = ndp->ni_vp; 1669 if (xp != NULL) { 1670 error = EEXIST; 1671 } else { 1672 xp = ndp->ni_dvp; 1673 if (vp->v_mount != xp->v_mount) 1674 error = EXDEV; 1675 } 1676 if (!error) { 1677 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY); 1678 if (!VN_IS_DOOMED(vp)) 1679 error = VOP_LINK(ndp->ni_dvp, vp, &ndp->ni_cnd); 1680 else 1681 error = EPERM; 1682 if (ndp->ni_dvp == vp) { 1683 vrele(ndp->ni_dvp); 1684 NFSVOPUNLOCK(vp); 1685 } else { 1686 vref(vp); 1687 VOP_VPUT_PAIR(ndp->ni_dvp, &vp, true); 1688 } 1689 } else { 1690 if (ndp->ni_dvp == ndp->ni_vp) 1691 vrele(ndp->ni_dvp); 1692 else 1693 vput(ndp->ni_dvp); 1694 if (ndp->ni_vp) 1695 vrele(ndp->ni_vp); 1696 } 1697 nfsvno_relpathbuf(ndp); 1698 NFSEXITCODE(error); 1699 return (error); 1700 } 1701 1702 /* 1703 * Do the fsync() appropriate for the commit. 1704 */ 1705 int 1706 nfsvno_fsync(struct vnode *vp, u_int64_t off, int cnt, struct ucred *cred, 1707 struct thread *td) 1708 { 1709 int error = 0; 1710 1711 /* 1712 * RFC 1813 3.3.21: if count is 0, a flush from offset to the end of 1713 * file is done. At this time VOP_FSYNC does not accept offset and 1714 * byte count parameters so call VOP_FSYNC the whole file for now. 1715 * The same is true for NFSv4: RFC 3530 Sec. 14.2.3. 1716 * File systems that do not use the buffer cache (as indicated 1717 * by MNTK_USES_BCACHE not being set) must use VOP_FSYNC(). 1718 */ 1719 if (cnt == 0 || cnt > MAX_COMMIT_COUNT || 1720 (vp->v_mount->mnt_kern_flag & MNTK_USES_BCACHE) == 0) { 1721 /* 1722 * Give up and do the whole thing 1723 */ 1724 if (vp->v_object && vm_object_mightbedirty(vp->v_object)) { 1725 VM_OBJECT_WLOCK(vp->v_object); 1726 vm_object_page_clean(vp->v_object, 0, 0, OBJPC_SYNC); 1727 VM_OBJECT_WUNLOCK(vp->v_object); 1728 } 1729 error = VOP_FSYNC(vp, MNT_WAIT, td); 1730 } else { 1731 /* 1732 * Locate and synchronously write any buffers that fall 1733 * into the requested range. Note: we are assuming that 1734 * f_iosize is a power of 2. 1735 */ 1736 int iosize = vp->v_mount->mnt_stat.f_iosize; 1737 int iomask = iosize - 1; 1738 struct bufobj *bo; 1739 daddr_t lblkno; 1740 1741 /* 1742 * Align to iosize boundary, super-align to page boundary. 1743 */ 1744 if (off & iomask) { 1745 cnt += off & iomask; 1746 off &= ~(u_quad_t)iomask; 1747 } 1748 if (off & PAGE_MASK) { 1749 cnt += off & PAGE_MASK; 1750 off &= ~(u_quad_t)PAGE_MASK; 1751 } 1752 lblkno = off / iosize; 1753 1754 if (vp->v_object && vm_object_mightbedirty(vp->v_object)) { 1755 VM_OBJECT_WLOCK(vp->v_object); 1756 vm_object_page_clean(vp->v_object, off, off + cnt, 1757 OBJPC_SYNC); 1758 VM_OBJECT_WUNLOCK(vp->v_object); 1759 } 1760 1761 bo = &vp->v_bufobj; 1762 BO_LOCK(bo); 1763 while (cnt > 0) { 1764 struct buf *bp; 1765 1766 /* 1767 * If we have a buffer and it is marked B_DELWRI we 1768 * have to lock and write it. Otherwise the prior 1769 * write is assumed to have already been committed. 1770 * 1771 * gbincore() can return invalid buffers now so we 1772 * have to check that bit as well (though B_DELWRI 1773 * should not be set if B_INVAL is set there could be 1774 * a race here since we haven't locked the buffer). 1775 */ 1776 if ((bp = gbincore(&vp->v_bufobj, lblkno)) != NULL) { 1777 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_SLEEPFAIL | 1778 LK_INTERLOCK, BO_LOCKPTR(bo)) == ENOLCK) { 1779 BO_LOCK(bo); 1780 continue; /* retry */ 1781 } 1782 if ((bp->b_flags & (B_DELWRI|B_INVAL)) == 1783 B_DELWRI) { 1784 bremfree(bp); 1785 bp->b_flags &= ~B_ASYNC; 1786 bwrite(bp); 1787 ++nfs_commit_miss; 1788 } else 1789 BUF_UNLOCK(bp); 1790 BO_LOCK(bo); 1791 } 1792 ++nfs_commit_blks; 1793 if (cnt < iosize) 1794 break; 1795 cnt -= iosize; 1796 ++lblkno; 1797 } 1798 BO_UNLOCK(bo); 1799 } 1800 NFSEXITCODE(error); 1801 return (error); 1802 } 1803 1804 /* 1805 * Statfs vnode op. 1806 */ 1807 int 1808 nfsvno_statfs(struct vnode *vp, struct statfs *sf) 1809 { 1810 struct statfs *tsf; 1811 int error; 1812 1813 tsf = NULL; 1814 if (nfsrv_devidcnt > 0) { 1815 /* For a pNFS service, get the DS numbers. */ 1816 tsf = malloc(sizeof(*tsf), M_TEMP, M_WAITOK | M_ZERO); 1817 error = nfsrv_pnfsstatfs(tsf, vp->v_mount); 1818 if (error != 0) { 1819 free(tsf, M_TEMP); 1820 tsf = NULL; 1821 } 1822 } 1823 error = VFS_STATFS(vp->v_mount, sf); 1824 if (error == 0) { 1825 if (tsf != NULL) { 1826 sf->f_blocks = tsf->f_blocks; 1827 sf->f_bavail = tsf->f_bavail; 1828 sf->f_bfree = tsf->f_bfree; 1829 sf->f_bsize = tsf->f_bsize; 1830 } 1831 /* 1832 * Since NFS handles these values as unsigned on the 1833 * wire, there is no way to represent negative values, 1834 * so set them to 0. Without this, they will appear 1835 * to be very large positive values for clients like 1836 * Solaris10. 1837 */ 1838 if (sf->f_bavail < 0) 1839 sf->f_bavail = 0; 1840 if (sf->f_ffree < 0) 1841 sf->f_ffree = 0; 1842 } 1843 free(tsf, M_TEMP); 1844 NFSEXITCODE(error); 1845 return (error); 1846 } 1847 1848 /* 1849 * Do the vnode op stuff for Open. Similar to nfsvno_createsub(), but 1850 * must handle nfsrv_opencheck() calls after any other access checks. 1851 */ 1852 void 1853 nfsvno_open(struct nfsrv_descript *nd, struct nameidata *ndp, 1854 nfsquad_t clientid, nfsv4stateid_t *stateidp, struct nfsstate *stp, 1855 int *exclusive_flagp, struct nfsvattr *nvap, int32_t *cverf, int create, 1856 NFSACL_T *aclp, nfsattrbit_t *attrbitp, struct ucred *cred, 1857 struct nfsexstuff *exp, struct vnode **vpp) 1858 { 1859 struct vnode *vp = NULL; 1860 u_quad_t tempsize; 1861 struct nfsexstuff nes; 1862 struct thread *p = curthread; 1863 1864 if (ndp->ni_vp == NULL) 1865 nd->nd_repstat = nfsrv_opencheck(clientid, 1866 stateidp, stp, NULL, nd, p, nd->nd_repstat); 1867 if (!nd->nd_repstat) { 1868 if (ndp->ni_vp == NULL) { 1869 vrele(ndp->ni_startdir); 1870 nd->nd_repstat = VOP_CREATE(ndp->ni_dvp, 1871 &ndp->ni_vp, &ndp->ni_cnd, &nvap->na_vattr); 1872 /* For a pNFS server, create the data file on a DS. */ 1873 if (nd->nd_repstat == 0) { 1874 /* 1875 * Create a data file on a DS for a pNFS server. 1876 * This function just returns if not 1877 * running a pNFS DS or the creation fails. 1878 */ 1879 nfsrv_pnfscreate(ndp->ni_vp, &nvap->na_vattr, 1880 cred, p); 1881 } 1882 VOP_VPUT_PAIR(ndp->ni_dvp, nd->nd_repstat == 0 ? 1883 &ndp->ni_vp : NULL, false); 1884 nfsvno_relpathbuf(ndp); 1885 if (!nd->nd_repstat) { 1886 if (*exclusive_flagp) { 1887 *exclusive_flagp = 0; 1888 NFSVNO_ATTRINIT(nvap); 1889 nvap->na_atime.tv_sec = cverf[0]; 1890 nvap->na_atime.tv_nsec = cverf[1]; 1891 nd->nd_repstat = VOP_SETATTR(ndp->ni_vp, 1892 &nvap->na_vattr, cred); 1893 if (nd->nd_repstat != 0) { 1894 vput(ndp->ni_vp); 1895 ndp->ni_vp = NULL; 1896 nd->nd_repstat = NFSERR_NOTSUPP; 1897 } else 1898 NFSSETBIT_ATTRBIT(attrbitp, 1899 NFSATTRBIT_TIMEACCESS); 1900 } else { 1901 nfsrv_fixattr(nd, ndp->ni_vp, nvap, 1902 aclp, p, attrbitp, exp); 1903 } 1904 } 1905 vp = ndp->ni_vp; 1906 } else { 1907 if (ndp->ni_startdir) 1908 vrele(ndp->ni_startdir); 1909 nfsvno_relpathbuf(ndp); 1910 vp = ndp->ni_vp; 1911 if (create == NFSV4OPEN_CREATE) { 1912 if (ndp->ni_dvp == vp) 1913 vrele(ndp->ni_dvp); 1914 else 1915 vput(ndp->ni_dvp); 1916 } 1917 if (NFSVNO_ISSETSIZE(nvap) && vp->v_type == VREG) { 1918 if (ndp->ni_cnd.cn_flags & RDONLY) 1919 NFSVNO_SETEXRDONLY(&nes); 1920 else 1921 NFSVNO_EXINIT(&nes); 1922 nd->nd_repstat = nfsvno_accchk(vp, 1923 VWRITE, cred, &nes, p, 1924 NFSACCCHK_NOOVERRIDE, 1925 NFSACCCHK_VPISLOCKED, NULL); 1926 nd->nd_repstat = nfsrv_opencheck(clientid, 1927 stateidp, stp, vp, nd, p, nd->nd_repstat); 1928 if (!nd->nd_repstat) { 1929 tempsize = nvap->na_size; 1930 NFSVNO_ATTRINIT(nvap); 1931 nvap->na_size = tempsize; 1932 nd->nd_repstat = VOP_SETATTR(vp, 1933 &nvap->na_vattr, cred); 1934 } 1935 } else if (vp->v_type == VREG) { 1936 nd->nd_repstat = nfsrv_opencheck(clientid, 1937 stateidp, stp, vp, nd, p, nd->nd_repstat); 1938 } 1939 } 1940 } else { 1941 if (ndp->ni_cnd.cn_flags & HASBUF) 1942 nfsvno_relpathbuf(ndp); 1943 if (ndp->ni_startdir && create == NFSV4OPEN_CREATE) { 1944 vrele(ndp->ni_startdir); 1945 if (ndp->ni_dvp == ndp->ni_vp) 1946 vrele(ndp->ni_dvp); 1947 else 1948 vput(ndp->ni_dvp); 1949 if (ndp->ni_vp) 1950 vput(ndp->ni_vp); 1951 } 1952 } 1953 *vpp = vp; 1954 1955 NFSEXITCODE2(0, nd); 1956 } 1957 1958 /* 1959 * Updates the file rev and sets the mtime and ctime 1960 * to the current clock time, returning the va_filerev and va_Xtime 1961 * values. 1962 * Return ESTALE to indicate the vnode is VIRF_DOOMED. 1963 */ 1964 int 1965 nfsvno_updfilerev(struct vnode *vp, struct nfsvattr *nvap, 1966 struct nfsrv_descript *nd, struct thread *p) 1967 { 1968 struct vattr va; 1969 1970 VATTR_NULL(&va); 1971 vfs_timestamp(&va.va_mtime); 1972 if (NFSVOPISLOCKED(vp) != LK_EXCLUSIVE) { 1973 NFSVOPLOCK(vp, LK_UPGRADE | LK_RETRY); 1974 if (VN_IS_DOOMED(vp)) 1975 return (ESTALE); 1976 } 1977 (void) VOP_SETATTR(vp, &va, nd->nd_cred); 1978 (void) nfsvno_getattr(vp, nvap, nd, p, 1, NULL); 1979 return (0); 1980 } 1981 1982 /* 1983 * Glue routine to nfsv4_fillattr(). 1984 */ 1985 int 1986 nfsvno_fillattr(struct nfsrv_descript *nd, struct mount *mp, struct vnode *vp, 1987 struct nfsvattr *nvap, fhandle_t *fhp, int rderror, nfsattrbit_t *attrbitp, 1988 struct ucred *cred, struct thread *p, int isdgram, int reterr, 1989 int supports_nfsv4acls, int at_root, uint64_t mounted_on_fileno) 1990 { 1991 struct statfs *sf; 1992 int error; 1993 1994 sf = NULL; 1995 if (nfsrv_devidcnt > 0 && 1996 (NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_SPACEAVAIL) || 1997 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_SPACEFREE) || 1998 NFSISSET_ATTRBIT(attrbitp, NFSATTRBIT_SPACETOTAL))) { 1999 sf = malloc(sizeof(*sf), M_TEMP, M_WAITOK | M_ZERO); 2000 error = nfsrv_pnfsstatfs(sf, mp); 2001 if (error != 0) { 2002 free(sf, M_TEMP); 2003 sf = NULL; 2004 } 2005 } 2006 error = nfsv4_fillattr(nd, mp, vp, NULL, &nvap->na_vattr, fhp, rderror, 2007 attrbitp, cred, p, isdgram, reterr, supports_nfsv4acls, at_root, 2008 mounted_on_fileno, sf); 2009 free(sf, M_TEMP); 2010 NFSEXITCODE2(0, nd); 2011 return (error); 2012 } 2013 2014 /* Since the Readdir vnode ops vary, put the entire functions in here. */ 2015 /* 2016 * nfs readdir service 2017 * - mallocs what it thinks is enough to read 2018 * count rounded up to a multiple of DIRBLKSIZ <= NFS_MAXREADDIR 2019 * - calls VOP_READDIR() 2020 * - loops around building the reply 2021 * if the output generated exceeds count break out of loop 2022 * The NFSM_CLGET macro is used here so that the reply will be packed 2023 * tightly in mbuf clusters. 2024 * - it trims out records with d_fileno == 0 2025 * this doesn't matter for Unix clients, but they might confuse clients 2026 * for other os'. 2027 * - it trims out records with d_type == DT_WHT 2028 * these cannot be seen through NFS (unless we extend the protocol) 2029 * The alternate call nfsrvd_readdirplus() does lookups as well. 2030 * PS: The NFS protocol spec. does not clarify what the "count" byte 2031 * argument is a count of.. just name strings and file id's or the 2032 * entire reply rpc or ... 2033 * I tried just file name and id sizes and it confused the Sun client, 2034 * so I am using the full rpc size now. The "paranoia.." comment refers 2035 * to including the status longwords that are not a part of the dir. 2036 * "entry" structures, but are in the rpc. 2037 */ 2038 int 2039 nfsrvd_readdir(struct nfsrv_descript *nd, int isdgram, 2040 struct vnode *vp, struct nfsexstuff *exp) 2041 { 2042 struct dirent *dp; 2043 u_int32_t *tl; 2044 int dirlen; 2045 char *cpos, *cend, *rbuf; 2046 struct nfsvattr at; 2047 int nlen, error = 0, getret = 1; 2048 int siz, cnt, fullsiz, eofflag, ncookies; 2049 u_int64_t off, toff, verf __unused; 2050 uint64_t *cookies = NULL, *cookiep; 2051 struct uio io; 2052 struct iovec iv; 2053 int is_ufs; 2054 struct thread *p = curthread; 2055 2056 if (nd->nd_repstat) { 2057 nfsrv_postopattr(nd, getret, &at); 2058 goto out; 2059 } 2060 if (nd->nd_flag & ND_NFSV2) { 2061 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2062 off = fxdr_unsigned(u_quad_t, *tl++); 2063 } else { 2064 NFSM_DISSECT(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2065 off = fxdr_hyper(tl); 2066 tl += 2; 2067 verf = fxdr_hyper(tl); 2068 tl += 2; 2069 } 2070 toff = off; 2071 cnt = fxdr_unsigned(int, *tl); 2072 if (cnt > NFS_SRVMAXDATA(nd) || cnt < 0) 2073 cnt = NFS_SRVMAXDATA(nd); 2074 siz = ((cnt + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 2075 fullsiz = siz; 2076 if (nd->nd_flag & ND_NFSV3) { 2077 nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd, p, 1, 2078 NULL); 2079 #if 0 2080 /* 2081 * va_filerev is not sufficient as a cookie verifier, 2082 * since it is not supposed to change when entries are 2083 * removed/added unless that offset cookies returned to 2084 * the client are no longer valid. 2085 */ 2086 if (!nd->nd_repstat && toff && verf != at.na_filerev) 2087 nd->nd_repstat = NFSERR_BAD_COOKIE; 2088 #endif 2089 } 2090 if (!nd->nd_repstat && vp->v_type != VDIR) 2091 nd->nd_repstat = NFSERR_NOTDIR; 2092 if (nd->nd_repstat == 0 && cnt == 0) { 2093 if (nd->nd_flag & ND_NFSV2) 2094 /* NFSv2 does not have NFSERR_TOOSMALL */ 2095 nd->nd_repstat = EPERM; 2096 else 2097 nd->nd_repstat = NFSERR_TOOSMALL; 2098 } 2099 if (!nd->nd_repstat) 2100 nd->nd_repstat = nfsvno_accchk(vp, VEXEC, 2101 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 2102 NFSACCCHK_VPISLOCKED, NULL); 2103 if (nd->nd_repstat) { 2104 vput(vp); 2105 if (nd->nd_flag & ND_NFSV3) 2106 nfsrv_postopattr(nd, getret, &at); 2107 goto out; 2108 } 2109 is_ufs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "ufs") == 0; 2110 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2111 again: 2112 eofflag = 0; 2113 if (cookies) { 2114 free(cookies, M_TEMP); 2115 cookies = NULL; 2116 } 2117 2118 iv.iov_base = rbuf; 2119 iv.iov_len = siz; 2120 io.uio_iov = &iv; 2121 io.uio_iovcnt = 1; 2122 io.uio_offset = (off_t)off; 2123 io.uio_resid = siz; 2124 io.uio_segflg = UIO_SYSSPACE; 2125 io.uio_rw = UIO_READ; 2126 io.uio_td = NULL; 2127 nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies, 2128 &cookies); 2129 off = (u_int64_t)io.uio_offset; 2130 if (io.uio_resid) 2131 siz -= io.uio_resid; 2132 2133 if (!cookies && !nd->nd_repstat) 2134 nd->nd_repstat = NFSERR_PERM; 2135 if (nd->nd_flag & ND_NFSV3) { 2136 getret = nfsvno_getattr(vp, &at, nd, p, 1, NULL); 2137 if (!nd->nd_repstat) 2138 nd->nd_repstat = getret; 2139 } 2140 2141 /* 2142 * Handles the failed cases. nd->nd_repstat == 0 past here. 2143 */ 2144 if (nd->nd_repstat) { 2145 vput(vp); 2146 free(rbuf, M_TEMP); 2147 if (cookies) 2148 free(cookies, M_TEMP); 2149 if (nd->nd_flag & ND_NFSV3) 2150 nfsrv_postopattr(nd, getret, &at); 2151 goto out; 2152 } 2153 /* 2154 * If nothing read, return eof 2155 * rpc reply 2156 */ 2157 if (siz == 0) { 2158 vput(vp); 2159 if (nd->nd_flag & ND_NFSV2) { 2160 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2161 } else { 2162 nfsrv_postopattr(nd, getret, &at); 2163 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2164 txdr_hyper(at.na_filerev, tl); 2165 tl += 2; 2166 } 2167 *tl++ = newnfs_false; 2168 *tl = newnfs_true; 2169 free(rbuf, M_TEMP); 2170 free(cookies, M_TEMP); 2171 goto out; 2172 } 2173 2174 /* 2175 * Check for degenerate cases of nothing useful read. 2176 * If so go try again 2177 */ 2178 cpos = rbuf; 2179 cend = rbuf + siz; 2180 dp = (struct dirent *)cpos; 2181 cookiep = cookies; 2182 2183 /* 2184 * For some reason FreeBSD's ufs_readdir() chooses to back the 2185 * directory offset up to a block boundary, so it is necessary to 2186 * skip over the records that precede the requested offset. This 2187 * requires the assumption that file offset cookies monotonically 2188 * increase. 2189 */ 2190 while (cpos < cend && ncookies > 0 && 2191 (dp->d_fileno == 0 || dp->d_type == DT_WHT || 2192 (is_ufs == 1 && ((u_quad_t)(*cookiep)) <= toff))) { 2193 cpos += dp->d_reclen; 2194 dp = (struct dirent *)cpos; 2195 cookiep++; 2196 ncookies--; 2197 } 2198 if (cpos >= cend || ncookies == 0) { 2199 siz = fullsiz; 2200 toff = off; 2201 goto again; 2202 } 2203 vput(vp); 2204 2205 /* 2206 * If cnt > MCLBYTES and the reply will not be saved, use 2207 * ext_pgs mbufs for TLS. 2208 * For NFSv4.0, we do not know for sure if the reply will 2209 * be saved, so do not use ext_pgs mbufs for NFSv4.0. 2210 */ 2211 if (cnt > MCLBYTES && siz > MCLBYTES && 2212 (nd->nd_flag & (ND_TLS | ND_EXTPG | ND_SAVEREPLY)) == ND_TLS && 2213 (nd->nd_flag & (ND_NFSV4 | ND_NFSV41)) != ND_NFSV4) 2214 nd->nd_flag |= ND_EXTPG; 2215 2216 /* 2217 * dirlen is the size of the reply, including all XDR and must 2218 * not exceed cnt. For NFSv2, RFC1094 didn't clearly indicate 2219 * if the XDR should be included in "count", but to be safe, we do. 2220 * (Include the two booleans at the end of the reply in dirlen now.) 2221 */ 2222 if (nd->nd_flag & ND_NFSV3) { 2223 nfsrv_postopattr(nd, getret, &at); 2224 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2225 txdr_hyper(at.na_filerev, tl); 2226 dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED; 2227 } else { 2228 dirlen = 2 * NFSX_UNSIGNED; 2229 } 2230 2231 /* Loop through the records and build reply */ 2232 while (cpos < cend && ncookies > 0) { 2233 nlen = dp->d_namlen; 2234 if (dp->d_fileno != 0 && dp->d_type != DT_WHT && 2235 nlen <= NFS_MAXNAMLEN) { 2236 if (nd->nd_flag & ND_NFSV3) 2237 dirlen += (6*NFSX_UNSIGNED + NFSM_RNDUP(nlen)); 2238 else 2239 dirlen += (4*NFSX_UNSIGNED + NFSM_RNDUP(nlen)); 2240 if (dirlen > cnt) { 2241 eofflag = 0; 2242 break; 2243 } 2244 2245 /* 2246 * Build the directory record xdr from 2247 * the dirent entry. 2248 */ 2249 if (nd->nd_flag & ND_NFSV3) { 2250 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2251 *tl++ = newnfs_true; 2252 *tl++ = 0; 2253 } else { 2254 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2255 *tl++ = newnfs_true; 2256 } 2257 *tl = txdr_unsigned(dp->d_fileno); 2258 (void) nfsm_strtom(nd, dp->d_name, nlen); 2259 if (nd->nd_flag & ND_NFSV3) { 2260 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2261 txdr_hyper(*cookiep, tl); 2262 } else { 2263 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 2264 *tl = txdr_unsigned(*cookiep); 2265 } 2266 } 2267 cpos += dp->d_reclen; 2268 dp = (struct dirent *)cpos; 2269 cookiep++; 2270 ncookies--; 2271 } 2272 if (cpos < cend) 2273 eofflag = 0; 2274 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2275 *tl++ = newnfs_false; 2276 if (eofflag) 2277 *tl = newnfs_true; 2278 else 2279 *tl = newnfs_false; 2280 free(rbuf, M_TEMP); 2281 free(cookies, M_TEMP); 2282 2283 out: 2284 NFSEXITCODE2(0, nd); 2285 return (0); 2286 nfsmout: 2287 vput(vp); 2288 NFSEXITCODE2(error, nd); 2289 return (error); 2290 } 2291 2292 /* 2293 * Readdirplus for V3 and Readdir for V4. 2294 */ 2295 int 2296 nfsrvd_readdirplus(struct nfsrv_descript *nd, int isdgram, 2297 struct vnode *vp, struct nfsexstuff *exp) 2298 { 2299 struct dirent *dp; 2300 u_int32_t *tl; 2301 int dirlen; 2302 char *cpos, *cend, *rbuf; 2303 struct vnode *nvp; 2304 fhandle_t nfh; 2305 struct nfsvattr nva, at, *nvap = &nva; 2306 struct mbuf *mb0, *mb1; 2307 struct nfsreferral *refp; 2308 int nlen, r, error = 0, getret = 1, usevget = 1; 2309 int siz, cnt, fullsiz, eofflag, ncookies, entrycnt; 2310 caddr_t bpos0, bpos1; 2311 u_int64_t off, toff, verf __unused; 2312 uint64_t *cookies = NULL, *cookiep; 2313 nfsattrbit_t attrbits, rderrbits, savbits; 2314 struct uio io; 2315 struct iovec iv; 2316 struct componentname cn; 2317 int at_root, is_ufs, is_zfs, needs_unbusy, supports_nfsv4acls; 2318 struct mount *mp, *new_mp; 2319 uint64_t mounted_on_fileno; 2320 struct thread *p = curthread; 2321 int bextpg0, bextpg1, bextpgsiz0, bextpgsiz1; 2322 2323 if (nd->nd_repstat) { 2324 nfsrv_postopattr(nd, getret, &at); 2325 goto out; 2326 } 2327 NFSM_DISSECT(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2328 off = fxdr_hyper(tl); 2329 toff = off; 2330 tl += 2; 2331 verf = fxdr_hyper(tl); 2332 tl += 2; 2333 siz = fxdr_unsigned(int, *tl++); 2334 cnt = fxdr_unsigned(int, *tl); 2335 2336 /* 2337 * Use the server's maximum data transfer size as the upper bound 2338 * on reply datalen. 2339 */ 2340 if (cnt > NFS_SRVMAXDATA(nd) || cnt < 0) 2341 cnt = NFS_SRVMAXDATA(nd); 2342 2343 /* 2344 * siz is a "hint" of how much directory information (name, fileid, 2345 * cookie) should be in the reply. At least one client "hints" 0, 2346 * so I set it to cnt for that case. I also round it up to the 2347 * next multiple of DIRBLKSIZ. 2348 * Since the size of a Readdirplus directory entry reply will always 2349 * be greater than a directory entry returned by VOP_READDIR(), it 2350 * does not make sense to read more than NFS_SRVMAXDATA() via 2351 * VOP_READDIR(). 2352 */ 2353 if (siz <= 0) 2354 siz = cnt; 2355 else if (siz > NFS_SRVMAXDATA(nd)) 2356 siz = NFS_SRVMAXDATA(nd); 2357 siz = ((siz + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); 2358 2359 if (nd->nd_flag & ND_NFSV4) { 2360 error = nfsrv_getattrbits(nd, &attrbits, NULL, NULL); 2361 if (error) 2362 goto nfsmout; 2363 NFSSET_ATTRBIT(&savbits, &attrbits); 2364 NFSCLRNOTFILLABLE_ATTRBIT(&attrbits, nd); 2365 NFSZERO_ATTRBIT(&rderrbits); 2366 NFSSETBIT_ATTRBIT(&rderrbits, NFSATTRBIT_RDATTRERROR); 2367 } else { 2368 NFSZERO_ATTRBIT(&attrbits); 2369 } 2370 fullsiz = siz; 2371 nd->nd_repstat = getret = nfsvno_getattr(vp, &at, nd, p, 1, NULL); 2372 #if 0 2373 if (!nd->nd_repstat) { 2374 if (off && verf != at.na_filerev) { 2375 /* 2376 * va_filerev is not sufficient as a cookie verifier, 2377 * since it is not supposed to change when entries are 2378 * removed/added unless that offset cookies returned to 2379 * the client are no longer valid. 2380 */ 2381 if (nd->nd_flag & ND_NFSV4) { 2382 nd->nd_repstat = NFSERR_NOTSAME; 2383 } else { 2384 nd->nd_repstat = NFSERR_BAD_COOKIE; 2385 } 2386 } 2387 } 2388 #endif 2389 if (!nd->nd_repstat && vp->v_type != VDIR) 2390 nd->nd_repstat = NFSERR_NOTDIR; 2391 if (!nd->nd_repstat && cnt == 0) 2392 nd->nd_repstat = NFSERR_TOOSMALL; 2393 if (!nd->nd_repstat) 2394 nd->nd_repstat = nfsvno_accchk(vp, VEXEC, 2395 nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE, 2396 NFSACCCHK_VPISLOCKED, NULL); 2397 if (nd->nd_repstat) { 2398 vput(vp); 2399 if (nd->nd_flag & ND_NFSV3) 2400 nfsrv_postopattr(nd, getret, &at); 2401 goto out; 2402 } 2403 is_ufs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "ufs") == 0; 2404 is_zfs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "zfs") == 0; 2405 2406 rbuf = malloc(siz, M_TEMP, M_WAITOK); 2407 again: 2408 eofflag = 0; 2409 if (cookies) { 2410 free(cookies, M_TEMP); 2411 cookies = NULL; 2412 } 2413 2414 iv.iov_base = rbuf; 2415 iv.iov_len = siz; 2416 io.uio_iov = &iv; 2417 io.uio_iovcnt = 1; 2418 io.uio_offset = (off_t)off; 2419 io.uio_resid = siz; 2420 io.uio_segflg = UIO_SYSSPACE; 2421 io.uio_rw = UIO_READ; 2422 io.uio_td = NULL; 2423 nd->nd_repstat = VOP_READDIR(vp, &io, nd->nd_cred, &eofflag, &ncookies, 2424 &cookies); 2425 off = (u_int64_t)io.uio_offset; 2426 if (io.uio_resid) 2427 siz -= io.uio_resid; 2428 2429 getret = nfsvno_getattr(vp, &at, nd, p, 1, NULL); 2430 2431 if (!cookies && !nd->nd_repstat) 2432 nd->nd_repstat = NFSERR_PERM; 2433 if (!nd->nd_repstat) 2434 nd->nd_repstat = getret; 2435 if (nd->nd_repstat) { 2436 vput(vp); 2437 if (cookies) 2438 free(cookies, M_TEMP); 2439 free(rbuf, M_TEMP); 2440 if (nd->nd_flag & ND_NFSV3) 2441 nfsrv_postopattr(nd, getret, &at); 2442 goto out; 2443 } 2444 /* 2445 * If nothing read, return eof 2446 * rpc reply 2447 */ 2448 if (siz == 0) { 2449 vput(vp); 2450 if (nd->nd_flag & ND_NFSV3) 2451 nfsrv_postopattr(nd, getret, &at); 2452 NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 2453 txdr_hyper(at.na_filerev, tl); 2454 tl += 2; 2455 *tl++ = newnfs_false; 2456 *tl = newnfs_true; 2457 free(cookies, M_TEMP); 2458 free(rbuf, M_TEMP); 2459 goto out; 2460 } 2461 2462 /* 2463 * Check for degenerate cases of nothing useful read. 2464 * If so go try again 2465 */ 2466 cpos = rbuf; 2467 cend = rbuf + siz; 2468 dp = (struct dirent *)cpos; 2469 cookiep = cookies; 2470 2471 /* 2472 * For some reason FreeBSD's ufs_readdir() chooses to back the 2473 * directory offset up to a block boundary, so it is necessary to 2474 * skip over the records that precede the requested offset. This 2475 * requires the assumption that file offset cookies monotonically 2476 * increase. 2477 */ 2478 while (cpos < cend && ncookies > 0 && 2479 (dp->d_fileno == 0 || dp->d_type == DT_WHT || 2480 (is_ufs == 1 && ((u_quad_t)(*cookiep)) <= toff) || 2481 ((nd->nd_flag & ND_NFSV4) && 2482 ((dp->d_namlen == 1 && dp->d_name[0] == '.') || 2483 (dp->d_namlen==2 && dp->d_name[0]=='.' && dp->d_name[1]=='.'))))) { 2484 cpos += dp->d_reclen; 2485 dp = (struct dirent *)cpos; 2486 cookiep++; 2487 ncookies--; 2488 } 2489 if (cpos >= cend || ncookies == 0) { 2490 siz = fullsiz; 2491 toff = off; 2492 goto again; 2493 } 2494 2495 /* 2496 * Busy the file system so that the mount point won't go away 2497 * and, as such, VFS_VGET() can be used safely. 2498 */ 2499 mp = vp->v_mount; 2500 vfs_ref(mp); 2501 NFSVOPUNLOCK(vp); 2502 nd->nd_repstat = vfs_busy(mp, 0); 2503 vfs_rel(mp); 2504 if (nd->nd_repstat != 0) { 2505 vrele(vp); 2506 free(cookies, M_TEMP); 2507 free(rbuf, M_TEMP); 2508 if (nd->nd_flag & ND_NFSV3) 2509 nfsrv_postopattr(nd, getret, &at); 2510 goto out; 2511 } 2512 2513 /* 2514 * Check to see if entries in this directory can be safely acquired 2515 * via VFS_VGET() or if a switch to VOP_LOOKUP() is required. 2516 * ZFS snapshot directories need VOP_LOOKUP(), so that any 2517 * automount of the snapshot directory that is required will 2518 * be done. 2519 * This needs to be done here for NFSv4, since NFSv4 never does 2520 * a VFS_VGET() for "." or "..". 2521 */ 2522 if (is_zfs == 1) { 2523 r = VFS_VGET(mp, at.na_fileid, LK_SHARED, &nvp); 2524 if (r == EOPNOTSUPP) { 2525 usevget = 0; 2526 cn.cn_nameiop = LOOKUP; 2527 cn.cn_lkflags = LK_SHARED | LK_RETRY; 2528 cn.cn_cred = nd->nd_cred; 2529 } else if (r == 0) 2530 vput(nvp); 2531 } 2532 2533 /* 2534 * If the reply is likely to exceed MCLBYTES and the reply will 2535 * not be saved, use ext_pgs mbufs for TLS. 2536 * It is difficult to predict how large each entry will be and 2537 * how many entries have been read, so just assume the directory 2538 * entries grow by a factor of 4 when attributes are included. 2539 * For NFSv4.0, we do not know for sure if the reply will 2540 * be saved, so do not use ext_pgs mbufs for NFSv4.0. 2541 */ 2542 if (cnt > MCLBYTES && siz > MCLBYTES / 4 && 2543 (nd->nd_flag & (ND_TLS | ND_EXTPG | ND_SAVEREPLY)) == ND_TLS && 2544 (nd->nd_flag & (ND_NFSV4 | ND_NFSV41)) != ND_NFSV4) 2545 nd->nd_flag |= ND_EXTPG; 2546 2547 /* 2548 * Save this position, in case there is an error before one entry 2549 * is created. 2550 */ 2551 mb0 = nd->nd_mb; 2552 bpos0 = nd->nd_bpos; 2553 bextpg0 = nd->nd_bextpg; 2554 bextpgsiz0 = nd->nd_bextpgsiz; 2555 2556 /* 2557 * Fill in the first part of the reply. 2558 * dirlen is the reply length in bytes and cannot exceed cnt. 2559 * (Include the two booleans at the end of the reply in dirlen now, 2560 * so we recognize when we have exceeded cnt.) 2561 */ 2562 if (nd->nd_flag & ND_NFSV3) { 2563 dirlen = NFSX_V3POSTOPATTR + NFSX_VERF + 2 * NFSX_UNSIGNED; 2564 nfsrv_postopattr(nd, getret, &at); 2565 } else { 2566 dirlen = NFSX_VERF + 2 * NFSX_UNSIGNED; 2567 } 2568 NFSM_BUILD(tl, u_int32_t *, NFSX_VERF); 2569 txdr_hyper(at.na_filerev, tl); 2570 2571 /* 2572 * Save this position, in case there is an empty reply needed. 2573 */ 2574 mb1 = nd->nd_mb; 2575 bpos1 = nd->nd_bpos; 2576 bextpg1 = nd->nd_bextpg; 2577 bextpgsiz1 = nd->nd_bextpgsiz; 2578 2579 /* Loop through the records and build reply */ 2580 entrycnt = 0; 2581 while (cpos < cend && ncookies > 0 && dirlen < cnt) { 2582 nlen = dp->d_namlen; 2583 if (dp->d_fileno != 0 && dp->d_type != DT_WHT && 2584 nlen <= NFS_MAXNAMLEN && 2585 ((nd->nd_flag & ND_NFSV3) || nlen > 2 || 2586 (nlen==2 && (dp->d_name[0]!='.' || dp->d_name[1]!='.')) 2587 || (nlen == 1 && dp->d_name[0] != '.'))) { 2588 /* 2589 * Save the current position in the reply, in case 2590 * this entry exceeds cnt. 2591 */ 2592 mb1 = nd->nd_mb; 2593 bpos1 = nd->nd_bpos; 2594 bextpg1 = nd->nd_bextpg; 2595 bextpgsiz1 = nd->nd_bextpgsiz; 2596 2597 /* 2598 * For readdir_and_lookup get the vnode using 2599 * the file number. 2600 */ 2601 nvp = NULL; 2602 refp = NULL; 2603 r = 0; 2604 at_root = 0; 2605 needs_unbusy = 0; 2606 new_mp = mp; 2607 mounted_on_fileno = (uint64_t)dp->d_fileno; 2608 if ((nd->nd_flag & ND_NFSV3) || 2609 NFSNONZERO_ATTRBIT(&savbits)) { 2610 if (nd->nd_flag & ND_NFSV4) 2611 refp = nfsv4root_getreferral(NULL, 2612 vp, dp->d_fileno); 2613 if (refp == NULL) { 2614 if (usevget) 2615 r = VFS_VGET(mp, dp->d_fileno, 2616 LK_SHARED, &nvp); 2617 else 2618 r = EOPNOTSUPP; 2619 if (r == EOPNOTSUPP) { 2620 if (usevget) { 2621 usevget = 0; 2622 cn.cn_nameiop = LOOKUP; 2623 cn.cn_lkflags = 2624 LK_SHARED | 2625 LK_RETRY; 2626 cn.cn_cred = 2627 nd->nd_cred; 2628 } 2629 cn.cn_nameptr = dp->d_name; 2630 cn.cn_namelen = nlen; 2631 cn.cn_flags = ISLASTCN | 2632 NOFOLLOW | LOCKLEAF; 2633 if (nlen == 2 && 2634 dp->d_name[0] == '.' && 2635 dp->d_name[1] == '.') 2636 cn.cn_flags |= 2637 ISDOTDOT; 2638 if (NFSVOPLOCK(vp, LK_SHARED) 2639 != 0) { 2640 nd->nd_repstat = EPERM; 2641 break; 2642 } 2643 if ((vp->v_vflag & VV_ROOT) != 0 2644 && (cn.cn_flags & ISDOTDOT) 2645 != 0) { 2646 vref(vp); 2647 nvp = vp; 2648 r = 0; 2649 } else { 2650 r = VOP_LOOKUP(vp, &nvp, 2651 &cn); 2652 if (vp != nvp) 2653 NFSVOPUNLOCK(vp); 2654 } 2655 } 2656 2657 /* 2658 * For NFSv4, check to see if nvp is 2659 * a mount point and get the mount 2660 * point vnode, as required. 2661 */ 2662 if (r == 0 && 2663 nfsrv_enable_crossmntpt != 0 && 2664 (nd->nd_flag & ND_NFSV4) != 0 && 2665 nvp->v_type == VDIR && 2666 nvp->v_mountedhere != NULL) { 2667 new_mp = nvp->v_mountedhere; 2668 r = vfs_busy(new_mp, 0); 2669 vput(nvp); 2670 nvp = NULL; 2671 if (r == 0) { 2672 r = VFS_ROOT(new_mp, 2673 LK_SHARED, &nvp); 2674 needs_unbusy = 1; 2675 if (r == 0) 2676 at_root = 1; 2677 } 2678 } 2679 } 2680 2681 /* 2682 * If we failed to look up the entry, then it 2683 * has become invalid, most likely removed. 2684 */ 2685 if (r != 0) { 2686 if (needs_unbusy) 2687 vfs_unbusy(new_mp); 2688 goto invalid; 2689 } 2690 KASSERT(refp != NULL || nvp != NULL, 2691 ("%s: undetected lookup error", __func__)); 2692 2693 if (refp == NULL && 2694 ((nd->nd_flag & ND_NFSV3) || 2695 NFSNONZERO_ATTRBIT(&attrbits))) { 2696 r = nfsvno_getfh(nvp, &nfh, p); 2697 if (!r) 2698 r = nfsvno_getattr(nvp, nvap, nd, p, 2699 1, &attrbits); 2700 if (r == 0 && is_zfs == 1 && 2701 nfsrv_enable_crossmntpt != 0 && 2702 (nd->nd_flag & ND_NFSV4) != 0 && 2703 nvp->v_type == VDIR && 2704 vp->v_mount != nvp->v_mount) { 2705 /* 2706 * For a ZFS snapshot, there is a 2707 * pseudo mount that does not set 2708 * v_mountedhere, so it needs to 2709 * be detected via a different 2710 * mount structure. 2711 */ 2712 at_root = 1; 2713 if (new_mp == mp) 2714 new_mp = nvp->v_mount; 2715 } 2716 } 2717 2718 /* 2719 * If we failed to get attributes of the entry, 2720 * then just skip it for NFSv3 (the traditional 2721 * behavior in the old NFS server). 2722 * For NFSv4 the behavior is controlled by 2723 * RDATTRERROR: we either ignore the error or 2724 * fail the request. 2725 * Note that RDATTRERROR is never set for NFSv3. 2726 */ 2727 if (r != 0) { 2728 if (!NFSISSET_ATTRBIT(&attrbits, 2729 NFSATTRBIT_RDATTRERROR)) { 2730 vput(nvp); 2731 if (needs_unbusy != 0) 2732 vfs_unbusy(new_mp); 2733 if ((nd->nd_flag & ND_NFSV3)) 2734 goto invalid; 2735 nd->nd_repstat = r; 2736 break; 2737 } 2738 } 2739 } 2740 2741 /* 2742 * Build the directory record xdr 2743 */ 2744 if (nd->nd_flag & ND_NFSV3) { 2745 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2746 *tl++ = newnfs_true; 2747 *tl++ = 0; 2748 *tl = txdr_unsigned(dp->d_fileno); 2749 dirlen += nfsm_strtom(nd, dp->d_name, nlen); 2750 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2751 txdr_hyper(*cookiep, tl); 2752 nfsrv_postopattr(nd, 0, nvap); 2753 dirlen += nfsm_fhtom(nd,(u_int8_t *)&nfh,0,1); 2754 dirlen += (5*NFSX_UNSIGNED+NFSX_V3POSTOPATTR); 2755 if (nvp != NULL) 2756 vput(nvp); 2757 } else { 2758 NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2759 *tl++ = newnfs_true; 2760 txdr_hyper(*cookiep, tl); 2761 dirlen += nfsm_strtom(nd, dp->d_name, nlen); 2762 if (nvp != NULL) { 2763 supports_nfsv4acls = 2764 nfs_supportsnfsv4acls(nvp); 2765 NFSVOPUNLOCK(nvp); 2766 } else 2767 supports_nfsv4acls = 0; 2768 if (refp != NULL) { 2769 dirlen += nfsrv_putreferralattr(nd, 2770 &savbits, refp, 0, 2771 &nd->nd_repstat); 2772 if (nd->nd_repstat) { 2773 if (nvp != NULL) 2774 vrele(nvp); 2775 if (needs_unbusy != 0) 2776 vfs_unbusy(new_mp); 2777 break; 2778 } 2779 } else if (r) { 2780 dirlen += nfsvno_fillattr(nd, new_mp, 2781 nvp, nvap, &nfh, r, &rderrbits, 2782 nd->nd_cred, p, isdgram, 0, 2783 supports_nfsv4acls, at_root, 2784 mounted_on_fileno); 2785 } else { 2786 dirlen += nfsvno_fillattr(nd, new_mp, 2787 nvp, nvap, &nfh, r, &attrbits, 2788 nd->nd_cred, p, isdgram, 0, 2789 supports_nfsv4acls, at_root, 2790 mounted_on_fileno); 2791 } 2792 if (nvp != NULL) 2793 vrele(nvp); 2794 dirlen += (3 * NFSX_UNSIGNED); 2795 } 2796 if (needs_unbusy != 0) 2797 vfs_unbusy(new_mp); 2798 if (dirlen <= cnt) 2799 entrycnt++; 2800 } 2801 invalid: 2802 cpos += dp->d_reclen; 2803 dp = (struct dirent *)cpos; 2804 cookiep++; 2805 ncookies--; 2806 } 2807 vrele(vp); 2808 vfs_unbusy(mp); 2809 2810 /* 2811 * If dirlen > cnt, we must strip off the last entry. If that 2812 * results in an empty reply, report NFSERR_TOOSMALL. 2813 */ 2814 if (dirlen > cnt || nd->nd_repstat) { 2815 if (!nd->nd_repstat && entrycnt == 0) 2816 nd->nd_repstat = NFSERR_TOOSMALL; 2817 if (nd->nd_repstat) { 2818 nfsm_trimtrailing(nd, mb0, bpos0, bextpg0, bextpgsiz0); 2819 if (nd->nd_flag & ND_NFSV3) 2820 nfsrv_postopattr(nd, getret, &at); 2821 } else 2822 nfsm_trimtrailing(nd, mb1, bpos1, bextpg1, bextpgsiz1); 2823 eofflag = 0; 2824 } else if (cpos < cend) 2825 eofflag = 0; 2826 if (!nd->nd_repstat) { 2827 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2828 *tl++ = newnfs_false; 2829 if (eofflag) 2830 *tl = newnfs_true; 2831 else 2832 *tl = newnfs_false; 2833 } 2834 free(cookies, M_TEMP); 2835 free(rbuf, M_TEMP); 2836 2837 out: 2838 NFSEXITCODE2(0, nd); 2839 return (0); 2840 nfsmout: 2841 vput(vp); 2842 NFSEXITCODE2(error, nd); 2843 return (error); 2844 } 2845 2846 /* 2847 * Get the settable attributes out of the mbuf list. 2848 * (Return 0 or EBADRPC) 2849 */ 2850 int 2851 nfsrv_sattr(struct nfsrv_descript *nd, vnode_t vp, struct nfsvattr *nvap, 2852 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p) 2853 { 2854 u_int32_t *tl; 2855 struct nfsv2_sattr *sp; 2856 int error = 0, toclient = 0; 2857 2858 switch (nd->nd_flag & (ND_NFSV2 | ND_NFSV3 | ND_NFSV4)) { 2859 case ND_NFSV2: 2860 NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2861 /* 2862 * Some old clients didn't fill in the high order 16bits. 2863 * --> check the low order 2 bytes for 0xffff 2864 */ 2865 if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) 2866 nvap->na_mode = nfstov_mode(sp->sa_mode); 2867 if (sp->sa_uid != newnfs_xdrneg1) 2868 nvap->na_uid = fxdr_unsigned(uid_t, sp->sa_uid); 2869 if (sp->sa_gid != newnfs_xdrneg1) 2870 nvap->na_gid = fxdr_unsigned(gid_t, sp->sa_gid); 2871 if (sp->sa_size != newnfs_xdrneg1) 2872 nvap->na_size = fxdr_unsigned(u_quad_t, sp->sa_size); 2873 if (sp->sa_atime.nfsv2_sec != newnfs_xdrneg1) { 2874 #ifdef notyet 2875 fxdr_nfsv2time(&sp->sa_atime, &nvap->na_atime); 2876 #else 2877 nvap->na_atime.tv_sec = 2878 fxdr_unsigned(u_int32_t,sp->sa_atime.nfsv2_sec); 2879 nvap->na_atime.tv_nsec = 0; 2880 #endif 2881 } 2882 if (sp->sa_mtime.nfsv2_sec != newnfs_xdrneg1) 2883 fxdr_nfsv2time(&sp->sa_mtime, &nvap->na_mtime); 2884 break; 2885 case ND_NFSV3: 2886 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2887 if (*tl == newnfs_true) { 2888 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2889 nvap->na_mode = nfstov_mode(*tl); 2890 } 2891 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2892 if (*tl == newnfs_true) { 2893 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2894 nvap->na_uid = fxdr_unsigned(uid_t, *tl); 2895 } 2896 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2897 if (*tl == newnfs_true) { 2898 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2899 nvap->na_gid = fxdr_unsigned(gid_t, *tl); 2900 } 2901 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2902 if (*tl == newnfs_true) { 2903 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2904 nvap->na_size = fxdr_hyper(tl); 2905 } 2906 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2907 switch (fxdr_unsigned(int, *tl)) { 2908 case NFSV3SATTRTIME_TOCLIENT: 2909 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2910 fxdr_nfsv3time(tl, &nvap->na_atime); 2911 toclient = 1; 2912 break; 2913 case NFSV3SATTRTIME_TOSERVER: 2914 vfs_timestamp(&nvap->na_atime); 2915 nvap->na_vaflags |= VA_UTIMES_NULL; 2916 break; 2917 } 2918 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2919 switch (fxdr_unsigned(int, *tl)) { 2920 case NFSV3SATTRTIME_TOCLIENT: 2921 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2922 fxdr_nfsv3time(tl, &nvap->na_mtime); 2923 nvap->na_vaflags &= ~VA_UTIMES_NULL; 2924 break; 2925 case NFSV3SATTRTIME_TOSERVER: 2926 vfs_timestamp(&nvap->na_mtime); 2927 if (!toclient) 2928 nvap->na_vaflags |= VA_UTIMES_NULL; 2929 break; 2930 } 2931 break; 2932 case ND_NFSV4: 2933 error = nfsv4_sattr(nd, vp, nvap, attrbitp, aclp, p); 2934 } 2935 nfsmout: 2936 NFSEXITCODE2(error, nd); 2937 return (error); 2938 } 2939 2940 /* 2941 * Handle the setable attributes for V4. 2942 * Returns NFSERR_BADXDR if it can't be parsed, 0 otherwise. 2943 */ 2944 int 2945 nfsv4_sattr(struct nfsrv_descript *nd, vnode_t vp, struct nfsvattr *nvap, 2946 nfsattrbit_t *attrbitp, NFSACL_T *aclp, struct thread *p) 2947 { 2948 u_int32_t *tl; 2949 int attrsum = 0; 2950 int i, j; 2951 int error, attrsize, bitpos, aclsize, aceerr, retnotsup = 0; 2952 int moderet, toclient = 0; 2953 u_char *cp, namestr[NFSV4_SMALLSTR + 1]; 2954 uid_t uid; 2955 gid_t gid; 2956 u_short mode, mask; /* Same type as va_mode. */ 2957 struct vattr va; 2958 2959 error = nfsrv_getattrbits(nd, attrbitp, NULL, &retnotsup); 2960 if (error) 2961 goto nfsmout; 2962 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 2963 attrsize = fxdr_unsigned(int, *tl); 2964 2965 /* 2966 * Loop around getting the setable attributes. If an unsupported 2967 * one is found, set nd_repstat == NFSERR_ATTRNOTSUPP and return. 2968 */ 2969 if (retnotsup) { 2970 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 2971 bitpos = NFSATTRBIT_MAX; 2972 } else { 2973 bitpos = 0; 2974 } 2975 moderet = 0; 2976 for (; bitpos < NFSATTRBIT_MAX; bitpos++) { 2977 if (attrsum > attrsize) { 2978 error = NFSERR_BADXDR; 2979 goto nfsmout; 2980 } 2981 if (NFSISSET_ATTRBIT(attrbitp, bitpos)) 2982 switch (bitpos) { 2983 case NFSATTRBIT_SIZE: 2984 NFSM_DISSECT(tl, u_int32_t *, NFSX_HYPER); 2985 if (vp != NULL && vp->v_type != VREG) { 2986 error = (vp->v_type == VDIR) ? NFSERR_ISDIR : 2987 NFSERR_INVAL; 2988 goto nfsmout; 2989 } 2990 nvap->na_size = fxdr_hyper(tl); 2991 attrsum += NFSX_HYPER; 2992 break; 2993 case NFSATTRBIT_ACL: 2994 error = nfsrv_dissectacl(nd, aclp, false, &aceerr, 2995 &aclsize, p); 2996 if (error) 2997 goto nfsmout; 2998 if (aceerr && !nd->nd_repstat) 2999 nd->nd_repstat = aceerr; 3000 attrsum += aclsize; 3001 break; 3002 case NFSATTRBIT_ARCHIVE: 3003 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3004 if (!nd->nd_repstat) 3005 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 3006 attrsum += NFSX_UNSIGNED; 3007 break; 3008 case NFSATTRBIT_HIDDEN: 3009 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3010 if (!nd->nd_repstat) 3011 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 3012 attrsum += NFSX_UNSIGNED; 3013 break; 3014 case NFSATTRBIT_MIMETYPE: 3015 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3016 i = fxdr_unsigned(int, *tl); 3017 error = nfsm_advance(nd, NFSM_RNDUP(i), -1); 3018 if (error) 3019 goto nfsmout; 3020 if (!nd->nd_repstat) 3021 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 3022 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(i)); 3023 break; 3024 case NFSATTRBIT_MODE: 3025 moderet = NFSERR_INVAL; /* Can't do MODESETMASKED. */ 3026 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3027 nvap->na_mode = nfstov_mode(*tl); 3028 attrsum += NFSX_UNSIGNED; 3029 break; 3030 case NFSATTRBIT_OWNER: 3031 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3032 j = fxdr_unsigned(int, *tl); 3033 if (j < 0) { 3034 error = NFSERR_BADXDR; 3035 goto nfsmout; 3036 } 3037 if (j > NFSV4_SMALLSTR) 3038 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK); 3039 else 3040 cp = namestr; 3041 error = nfsrv_mtostr(nd, cp, j); 3042 if (error) { 3043 if (j > NFSV4_SMALLSTR) 3044 free(cp, M_NFSSTRING); 3045 goto nfsmout; 3046 } 3047 if (!nd->nd_repstat) { 3048 nd->nd_repstat = nfsv4_strtouid(nd, cp, j, 3049 &uid); 3050 if (!nd->nd_repstat) 3051 nvap->na_uid = uid; 3052 } 3053 if (j > NFSV4_SMALLSTR) 3054 free(cp, M_NFSSTRING); 3055 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j)); 3056 break; 3057 case NFSATTRBIT_OWNERGROUP: 3058 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3059 j = fxdr_unsigned(int, *tl); 3060 if (j < 0) { 3061 error = NFSERR_BADXDR; 3062 goto nfsmout; 3063 } 3064 if (j > NFSV4_SMALLSTR) 3065 cp = malloc(j + 1, M_NFSSTRING, M_WAITOK); 3066 else 3067 cp = namestr; 3068 error = nfsrv_mtostr(nd, cp, j); 3069 if (error) { 3070 if (j > NFSV4_SMALLSTR) 3071 free(cp, M_NFSSTRING); 3072 goto nfsmout; 3073 } 3074 if (!nd->nd_repstat) { 3075 nd->nd_repstat = nfsv4_strtogid(nd, cp, j, 3076 &gid); 3077 if (!nd->nd_repstat) 3078 nvap->na_gid = gid; 3079 } 3080 if (j > NFSV4_SMALLSTR) 3081 free(cp, M_NFSSTRING); 3082 attrsum += (NFSX_UNSIGNED + NFSM_RNDUP(j)); 3083 break; 3084 case NFSATTRBIT_SYSTEM: 3085 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3086 if (!nd->nd_repstat) 3087 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 3088 attrsum += NFSX_UNSIGNED; 3089 break; 3090 case NFSATTRBIT_TIMEACCESSSET: 3091 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3092 attrsum += NFSX_UNSIGNED; 3093 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) { 3094 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 3095 fxdr_nfsv4time(tl, &nvap->na_atime); 3096 toclient = 1; 3097 attrsum += NFSX_V4TIME; 3098 } else { 3099 vfs_timestamp(&nvap->na_atime); 3100 nvap->na_vaflags |= VA_UTIMES_NULL; 3101 } 3102 break; 3103 case NFSATTRBIT_TIMEBACKUP: 3104 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 3105 if (!nd->nd_repstat) 3106 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 3107 attrsum += NFSX_V4TIME; 3108 break; 3109 case NFSATTRBIT_TIMECREATE: 3110 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 3111 fxdr_nfsv4time(tl, &nvap->na_btime); 3112 attrsum += NFSX_V4TIME; 3113 break; 3114 case NFSATTRBIT_TIMEMODIFYSET: 3115 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 3116 attrsum += NFSX_UNSIGNED; 3117 if (fxdr_unsigned(int, *tl)==NFSV4SATTRTIME_TOCLIENT) { 3118 NFSM_DISSECT(tl, u_int32_t *, NFSX_V4TIME); 3119 fxdr_nfsv4time(tl, &nvap->na_mtime); 3120 nvap->na_vaflags &= ~VA_UTIMES_NULL; 3121 attrsum += NFSX_V4TIME; 3122 } else { 3123 vfs_timestamp(&nvap->na_mtime); 3124 if (!toclient) 3125 nvap->na_vaflags |= VA_UTIMES_NULL; 3126 } 3127 break; 3128 case NFSATTRBIT_MODESETMASKED: 3129 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 3130 mode = fxdr_unsigned(u_short, *tl++); 3131 mask = fxdr_unsigned(u_short, *tl); 3132 /* 3133 * vp == NULL implies an Open/Create operation. 3134 * This attribute can only be used for Setattr and 3135 * only for NFSv4.1 or higher. 3136 * If moderet != 0, a mode attribute has also been 3137 * specified and this attribute cannot be done in the 3138 * same Setattr operation. 3139 */ 3140 if ((nd->nd_flag & ND_NFSV41) == 0) 3141 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 3142 else if ((mode & ~07777) != 0 || (mask & ~07777) != 0 || 3143 vp == NULL) 3144 nd->nd_repstat = NFSERR_INVAL; 3145 else if (moderet == 0) 3146 moderet = VOP_GETATTR(vp, &va, nd->nd_cred); 3147 if (moderet == 0) 3148 nvap->na_mode = (mode & mask) | 3149 (va.va_mode & ~mask); 3150 else 3151 nd->nd_repstat = moderet; 3152 attrsum += 2 * NFSX_UNSIGNED; 3153 break; 3154 default: 3155 nd->nd_repstat = NFSERR_ATTRNOTSUPP; 3156 /* 3157 * set bitpos so we drop out of the loop. 3158 */ 3159 bitpos = NFSATTRBIT_MAX; 3160 break; 3161 } 3162 } 3163 3164 /* 3165 * some clients pad the attrlist, so we need to skip over the 3166 * padding. 3167 */ 3168 if (attrsum > attrsize) { 3169 error = NFSERR_BADXDR; 3170 } else { 3171 attrsize = NFSM_RNDUP(attrsize); 3172 if (attrsum < attrsize) 3173 error = nfsm_advance(nd, attrsize - attrsum, -1); 3174 } 3175 nfsmout: 3176 NFSEXITCODE2(error, nd); 3177 return (error); 3178 } 3179 3180 /* 3181 * Check/setup export credentials. 3182 */ 3183 int 3184 nfsd_excred(struct nfsrv_descript *nd, struct nfsexstuff *exp, 3185 struct ucred *credanon, bool testsec) 3186 { 3187 int error; 3188 3189 /* 3190 * Check/setup credentials. 3191 */ 3192 if (nd->nd_flag & ND_GSS) 3193 exp->nes_exflag &= ~MNT_EXPORTANON; 3194 3195 /* 3196 * Check to see if the operation is allowed for this security flavor. 3197 */ 3198 error = 0; 3199 if (testsec) { 3200 error = nfsvno_testexp(nd, exp); 3201 if (error != 0) 3202 goto out; 3203 } 3204 3205 /* 3206 * Check to see if the file system is exported V4 only. 3207 */ 3208 if (NFSVNO_EXV4ONLY(exp) && !(nd->nd_flag & ND_NFSV4)) { 3209 error = NFSERR_PROGNOTV4; 3210 goto out; 3211 } 3212 3213 /* 3214 * Now, map the user credentials. 3215 * (Note that ND_AUTHNONE will only be set for an NFSv3 3216 * Fsinfo RPC. If set for anything else, this code might need 3217 * to change.) 3218 */ 3219 if (NFSVNO_EXPORTED(exp)) { 3220 if (((nd->nd_flag & ND_GSS) == 0 && nd->nd_cred->cr_uid == 0) || 3221 NFSVNO_EXPORTANON(exp) || 3222 (nd->nd_flag & ND_AUTHNONE) != 0) { 3223 nd->nd_cred->cr_uid = credanon->cr_uid; 3224 nd->nd_cred->cr_gid = credanon->cr_gid; 3225 crsetgroups(nd->nd_cred, credanon->cr_ngroups, 3226 credanon->cr_groups); 3227 } else if ((nd->nd_flag & ND_GSS) == 0) { 3228 /* 3229 * If using AUTH_SYS, call nfsrv_getgrpscred() to see 3230 * if there is a replacement credential with a group 3231 * list set up by "nfsuserd -manage-gids". 3232 * If there is no replacement, nfsrv_getgrpscred() 3233 * simply returns its argument. 3234 */ 3235 nd->nd_cred = nfsrv_getgrpscred(nd->nd_cred); 3236 } 3237 } 3238 3239 out: 3240 NFSEXITCODE2(error, nd); 3241 return (error); 3242 } 3243 3244 /* 3245 * Check exports. 3246 */ 3247 int 3248 nfsvno_checkexp(struct mount *mp, struct sockaddr *nam, struct nfsexstuff *exp, 3249 struct ucred **credp) 3250 { 3251 int error; 3252 3253 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp, 3254 &exp->nes_numsecflavor, exp->nes_secflavors); 3255 if (error) { 3256 if (nfs_rootfhset) { 3257 exp->nes_exflag = 0; 3258 exp->nes_numsecflavor = 0; 3259 error = 0; 3260 } 3261 } else if (exp->nes_numsecflavor < 1 || exp->nes_numsecflavor > 3262 MAXSECFLAVORS) { 3263 printf("nfsvno_checkexp: numsecflavors out of range\n"); 3264 exp->nes_numsecflavor = 0; 3265 error = EACCES; 3266 } 3267 NFSEXITCODE(error); 3268 return (error); 3269 } 3270 3271 /* 3272 * Get a vnode for a file handle and export stuff. 3273 */ 3274 int 3275 nfsvno_fhtovp(struct mount *mp, fhandle_t *fhp, struct sockaddr *nam, 3276 int lktype, struct vnode **vpp, struct nfsexstuff *exp, 3277 struct ucred **credp) 3278 { 3279 int error; 3280 3281 *credp = NULL; 3282 exp->nes_numsecflavor = 0; 3283 error = VFS_FHTOVP(mp, &fhp->fh_fid, lktype, vpp); 3284 if (error != 0) 3285 /* Make sure the server replies ESTALE to the client. */ 3286 error = ESTALE; 3287 if (nam && !error) { 3288 error = VFS_CHECKEXP(mp, nam, &exp->nes_exflag, credp, 3289 &exp->nes_numsecflavor, exp->nes_secflavors); 3290 if (error) { 3291 if (nfs_rootfhset) { 3292 exp->nes_exflag = 0; 3293 exp->nes_numsecflavor = 0; 3294 error = 0; 3295 } else { 3296 vput(*vpp); 3297 } 3298 } else if (exp->nes_numsecflavor < 1 || exp->nes_numsecflavor > 3299 MAXSECFLAVORS) { 3300 printf("nfsvno_fhtovp: numsecflavors out of range\n"); 3301 exp->nes_numsecflavor = 0; 3302 error = EACCES; 3303 vput(*vpp); 3304 } 3305 } 3306 NFSEXITCODE(error); 3307 return (error); 3308 } 3309 3310 /* 3311 * nfsd_fhtovp() - convert a fh to a vnode ptr 3312 * - look up fsid in mount list (if not found ret error) 3313 * - get vp and export rights by calling nfsvno_fhtovp() 3314 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 3315 * for AUTH_SYS 3316 * - if mpp != NULL, return the mount point so that it can 3317 * be used for vn_finished_write() by the caller 3318 */ 3319 void 3320 nfsd_fhtovp(struct nfsrv_descript *nd, struct nfsrvfh *nfp, int lktype, 3321 struct vnode **vpp, struct nfsexstuff *exp, 3322 struct mount **mpp, int startwrite, int nextop) 3323 { 3324 struct mount *mp, *mpw; 3325 struct ucred *credanon; 3326 fhandle_t *fhp; 3327 int error; 3328 3329 if (mpp != NULL) 3330 *mpp = NULL; 3331 *vpp = NULL; 3332 fhp = (fhandle_t *)nfp->nfsrvfh_data; 3333 mp = vfs_busyfs(&fhp->fh_fsid); 3334 if (mp == NULL) { 3335 nd->nd_repstat = ESTALE; 3336 goto out; 3337 } 3338 3339 if (startwrite) { 3340 mpw = mp; 3341 error = vn_start_write(NULL, &mpw, V_WAIT); 3342 if (error != 0) { 3343 mpw = NULL; 3344 vfs_unbusy(mp); 3345 nd->nd_repstat = ESTALE; 3346 goto out; 3347 } 3348 if (lktype == LK_SHARED && !(MNT_SHARED_WRITES(mp))) 3349 lktype = LK_EXCLUSIVE; 3350 } else 3351 mpw = NULL; 3352 3353 nd->nd_repstat = nfsvno_fhtovp(mp, fhp, nd->nd_nam, lktype, vpp, exp, 3354 &credanon); 3355 vfs_unbusy(mp); 3356 3357 /* 3358 * For NFSv4 without a pseudo root fs, unexported file handles 3359 * can be returned, so that Lookup works everywhere. 3360 */ 3361 if (!nd->nd_repstat && exp->nes_exflag == 0 && 3362 !(nd->nd_flag & ND_NFSV4)) { 3363 vput(*vpp); 3364 *vpp = NULL; 3365 nd->nd_repstat = EACCES; 3366 } 3367 3368 /* 3369 * Personally, I've never seen any point in requiring a 3370 * reserved port#, since only in the rare case where the 3371 * clients are all boxes with secure system privileges, 3372 * does it provide any enhanced security, but... some people 3373 * believe it to be useful and keep putting this code back in. 3374 * (There is also some "security checker" out there that 3375 * complains if the nfs server doesn't enforce this.) 3376 * However, note the following: 3377 * RFC3530 (NFSv4) specifies that a reserved port# not be 3378 * required. 3379 * RFC2623 recommends that, if a reserved port# is checked for, 3380 * that there be a way to turn that off--> ifdef'd. 3381 */ 3382 #ifdef NFS_REQRSVPORT 3383 if (!nd->nd_repstat) { 3384 struct sockaddr_in *saddr; 3385 struct sockaddr_in6 *saddr6; 3386 3387 saddr = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in *); 3388 saddr6 = NFSSOCKADDR(nd->nd_nam, struct sockaddr_in6 *); 3389 if (!(nd->nd_flag & ND_NFSV4) && 3390 ((saddr->sin_family == AF_INET && 3391 ntohs(saddr->sin_port) >= IPPORT_RESERVED) || 3392 (saddr6->sin6_family == AF_INET6 && 3393 ntohs(saddr6->sin6_port) >= IPPORT_RESERVED))) { 3394 vput(*vpp); 3395 nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK); 3396 } 3397 } 3398 #endif /* NFS_REQRSVPORT */ 3399 3400 /* 3401 * Check/setup credentials. 3402 */ 3403 if (!nd->nd_repstat) { 3404 nd->nd_saveduid = nd->nd_cred->cr_uid; 3405 nd->nd_repstat = nfsd_excred(nd, exp, credanon, 3406 nfsrv_checkwrongsec(nd, nextop, (*vpp)->v_type)); 3407 if (nd->nd_repstat) 3408 vput(*vpp); 3409 } 3410 if (credanon != NULL) 3411 crfree(credanon); 3412 if (nd->nd_repstat) { 3413 vn_finished_write(mpw); 3414 *vpp = NULL; 3415 } else if (mpp != NULL) { 3416 *mpp = mpw; 3417 } 3418 3419 out: 3420 NFSEXITCODE2(0, nd); 3421 } 3422 3423 /* 3424 * glue for fp. 3425 */ 3426 static int 3427 fp_getfvp(struct thread *p, int fd, struct file **fpp, struct vnode **vpp) 3428 { 3429 struct filedesc *fdp; 3430 struct file *fp; 3431 int error = 0; 3432 3433 fdp = p->td_proc->p_fd; 3434 if (fd < 0 || fd >= fdp->fd_nfiles || 3435 (fp = fdp->fd_ofiles[fd].fde_file) == NULL) { 3436 error = EBADF; 3437 goto out; 3438 } 3439 *fpp = fp; 3440 3441 out: 3442 NFSEXITCODE(error); 3443 return (error); 3444 } 3445 3446 /* 3447 * Called from nfssvc() to update the exports list. Just call 3448 * vfs_export(). This has to be done, since the v4 root fake fs isn't 3449 * in the mount list. 3450 */ 3451 int 3452 nfsrv_v4rootexport(void *argp, struct ucred *cred, struct thread *p) 3453 { 3454 struct nfsex_args *nfsexargp = (struct nfsex_args *)argp; 3455 int error = 0; 3456 struct nameidata nd; 3457 fhandle_t fh; 3458 3459 error = vfs_export(&nfsv4root_mnt, &nfsexargp->export); 3460 if ((nfsexargp->export.ex_flags & MNT_DELEXPORT) != 0) 3461 nfs_rootfhset = 0; 3462 else if (error == 0) { 3463 if (nfsexargp->fspec == NULL) { 3464 error = EPERM; 3465 goto out; 3466 } 3467 /* 3468 * If fspec != NULL, this is the v4root path. 3469 */ 3470 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, nfsexargp->fspec); 3471 if ((error = namei(&nd)) != 0) 3472 goto out; 3473 error = nfsvno_getfh(nd.ni_vp, &fh, p); 3474 vrele(nd.ni_vp); 3475 if (!error) { 3476 nfs_rootfh.nfsrvfh_len = NFSX_MYFH; 3477 NFSBCOPY((caddr_t)&fh, 3478 nfs_rootfh.nfsrvfh_data, 3479 sizeof (fhandle_t)); 3480 nfs_rootfhset = 1; 3481 } 3482 } 3483 3484 out: 3485 NFSEXITCODE(error); 3486 return (error); 3487 } 3488 3489 /* 3490 * This function needs to test to see if the system is near its limit 3491 * for memory allocation via malloc() or mget() and return True iff 3492 * either of these resources are near their limit. 3493 * XXX (For now, this is just a stub.) 3494 */ 3495 int nfsrv_testmalloclimit = 0; 3496 int 3497 nfsrv_mallocmget_limit(void) 3498 { 3499 static int printmesg = 0; 3500 static int testval = 1; 3501 3502 if (nfsrv_testmalloclimit && (testval++ % 1000) == 0) { 3503 if ((printmesg++ % 100) == 0) 3504 printf("nfsd: malloc/mget near limit\n"); 3505 return (1); 3506 } 3507 return (0); 3508 } 3509 3510 /* 3511 * BSD specific initialization of a mount point. 3512 */ 3513 void 3514 nfsd_mntinit(void) 3515 { 3516 static int inited = 0; 3517 3518 if (inited) 3519 return; 3520 inited = 1; 3521 nfsv4root_mnt.mnt_flag = (MNT_RDONLY | MNT_EXPORTED); 3522 TAILQ_INIT(&nfsv4root_mnt.mnt_nvnodelist); 3523 TAILQ_INIT(&nfsv4root_mnt.mnt_lazyvnodelist); 3524 nfsv4root_mnt.mnt_export = NULL; 3525 TAILQ_INIT(&nfsv4root_opt); 3526 TAILQ_INIT(&nfsv4root_newopt); 3527 nfsv4root_mnt.mnt_opt = &nfsv4root_opt; 3528 nfsv4root_mnt.mnt_optnew = &nfsv4root_newopt; 3529 nfsv4root_mnt.mnt_nvnodelistsize = 0; 3530 nfsv4root_mnt.mnt_lazyvnodelistsize = 0; 3531 } 3532 3533 /* 3534 * Get a vnode for a file handle, without checking exports, etc. 3535 */ 3536 struct vnode * 3537 nfsvno_getvp(fhandle_t *fhp) 3538 { 3539 struct mount *mp; 3540 struct vnode *vp; 3541 int error; 3542 3543 mp = vfs_busyfs(&fhp->fh_fsid); 3544 if (mp == NULL) 3545 return (NULL); 3546 error = VFS_FHTOVP(mp, &fhp->fh_fid, LK_EXCLUSIVE, &vp); 3547 vfs_unbusy(mp); 3548 if (error) 3549 return (NULL); 3550 return (vp); 3551 } 3552 3553 /* 3554 * Do a local VOP_ADVLOCK(). 3555 */ 3556 int 3557 nfsvno_advlock(struct vnode *vp, int ftype, u_int64_t first, 3558 u_int64_t end, struct thread *td) 3559 { 3560 int error = 0; 3561 struct flock fl; 3562 u_int64_t tlen; 3563 3564 if (nfsrv_dolocallocks == 0) 3565 goto out; 3566 ASSERT_VOP_UNLOCKED(vp, "nfsvno_advlock: vp locked"); 3567 3568 fl.l_whence = SEEK_SET; 3569 fl.l_type = ftype; 3570 fl.l_start = (off_t)first; 3571 if (end == NFS64BITSSET) { 3572 fl.l_len = 0; 3573 } else { 3574 tlen = end - first; 3575 fl.l_len = (off_t)tlen; 3576 } 3577 /* 3578 * For FreeBSD8, the l_pid and l_sysid must be set to the same 3579 * values for all calls, so that all locks will be held by the 3580 * nfsd server. (The nfsd server handles conflicts between the 3581 * various clients.) 3582 * Since an NFSv4 lockowner is a ClientID plus an array of up to 1024 3583 * bytes, so it can't be put in l_sysid. 3584 */ 3585 if (nfsv4_sysid == 0) 3586 nfsv4_sysid = nlm_acquire_next_sysid(); 3587 fl.l_pid = (pid_t)0; 3588 fl.l_sysid = (int)nfsv4_sysid; 3589 3590 if (ftype == F_UNLCK) 3591 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_UNLCK, &fl, 3592 (F_POSIX | F_REMOTE)); 3593 else 3594 error = VOP_ADVLOCK(vp, (caddr_t)td->td_proc, F_SETLK, &fl, 3595 (F_POSIX | F_REMOTE)); 3596 3597 out: 3598 NFSEXITCODE(error); 3599 return (error); 3600 } 3601 3602 /* 3603 * Check the nfsv4 root exports. 3604 */ 3605 int 3606 nfsvno_v4rootexport(struct nfsrv_descript *nd) 3607 { 3608 struct ucred *credanon; 3609 int error = 0, numsecflavor, secflavors[MAXSECFLAVORS], i; 3610 uint64_t exflags; 3611 3612 error = vfs_stdcheckexp(&nfsv4root_mnt, nd->nd_nam, &exflags, 3613 &credanon, &numsecflavor, secflavors); 3614 if (error) { 3615 error = NFSERR_PROGUNAVAIL; 3616 goto out; 3617 } 3618 if (credanon != NULL) 3619 crfree(credanon); 3620 for (i = 0; i < numsecflavor; i++) { 3621 if (secflavors[i] == AUTH_SYS) 3622 nd->nd_flag |= ND_EXAUTHSYS; 3623 else if (secflavors[i] == RPCSEC_GSS_KRB5) 3624 nd->nd_flag |= ND_EXGSS; 3625 else if (secflavors[i] == RPCSEC_GSS_KRB5I) 3626 nd->nd_flag |= ND_EXGSSINTEGRITY; 3627 else if (secflavors[i] == RPCSEC_GSS_KRB5P) 3628 nd->nd_flag |= ND_EXGSSPRIVACY; 3629 } 3630 3631 /* And set ND_EXxx flags for TLS. */ 3632 if ((exflags & MNT_EXTLS) != 0) { 3633 nd->nd_flag |= ND_EXTLS; 3634 if ((exflags & MNT_EXTLSCERT) != 0) 3635 nd->nd_flag |= ND_EXTLSCERT; 3636 if ((exflags & MNT_EXTLSCERTUSER) != 0) 3637 nd->nd_flag |= ND_EXTLSCERTUSER; 3638 } 3639 3640 out: 3641 NFSEXITCODE(error); 3642 return (error); 3643 } 3644 3645 /* 3646 * Nfs server pseudo system call for the nfsd's 3647 */ 3648 /* 3649 * MPSAFE 3650 */ 3651 static int 3652 nfssvc_nfsd(struct thread *td, struct nfssvc_args *uap) 3653 { 3654 struct file *fp; 3655 struct nfsd_addsock_args sockarg; 3656 struct nfsd_nfsd_args nfsdarg; 3657 struct nfsd_nfsd_oargs onfsdarg; 3658 struct nfsd_pnfsd_args pnfsdarg; 3659 struct vnode *vp, *nvp, *curdvp; 3660 struct pnfsdsfile *pf; 3661 struct nfsdevice *ds, *fds; 3662 cap_rights_t rights; 3663 int buflen, error, ret; 3664 char *buf, *cp, *cp2, *cp3; 3665 char fname[PNFS_FILENAME_LEN + 1]; 3666 3667 if (uap->flag & NFSSVC_NFSDADDSOCK) { 3668 error = copyin(uap->argp, (caddr_t)&sockarg, sizeof (sockarg)); 3669 if (error) 3670 goto out; 3671 /* 3672 * Since we don't know what rights might be required, 3673 * pretend that we need them all. It is better to be too 3674 * careful than too reckless. 3675 */ 3676 error = fget(td, sockarg.sock, 3677 cap_rights_init_one(&rights, CAP_SOCK_SERVER), &fp); 3678 if (error != 0) 3679 goto out; 3680 if (fp->f_type != DTYPE_SOCKET) { 3681 fdrop(fp, td); 3682 error = EPERM; 3683 goto out; 3684 } 3685 error = nfsrvd_addsock(fp); 3686 fdrop(fp, td); 3687 } else if (uap->flag & NFSSVC_NFSDNFSD) { 3688 if (uap->argp == NULL) { 3689 error = EINVAL; 3690 goto out; 3691 } 3692 if ((uap->flag & NFSSVC_NEWSTRUCT) == 0) { 3693 error = copyin(uap->argp, &onfsdarg, sizeof(onfsdarg)); 3694 if (error == 0) { 3695 nfsdarg.principal = onfsdarg.principal; 3696 nfsdarg.minthreads = onfsdarg.minthreads; 3697 nfsdarg.maxthreads = onfsdarg.maxthreads; 3698 nfsdarg.version = 1; 3699 nfsdarg.addr = NULL; 3700 nfsdarg.addrlen = 0; 3701 nfsdarg.dnshost = NULL; 3702 nfsdarg.dnshostlen = 0; 3703 nfsdarg.dspath = NULL; 3704 nfsdarg.dspathlen = 0; 3705 nfsdarg.mdspath = NULL; 3706 nfsdarg.mdspathlen = 0; 3707 nfsdarg.mirrorcnt = 1; 3708 } 3709 } else 3710 error = copyin(uap->argp, &nfsdarg, sizeof(nfsdarg)); 3711 if (error) 3712 goto out; 3713 if (nfsdarg.addrlen > 0 && nfsdarg.addrlen < 10000 && 3714 nfsdarg.dnshostlen > 0 && nfsdarg.dnshostlen < 10000 && 3715 nfsdarg.dspathlen > 0 && nfsdarg.dspathlen < 10000 && 3716 nfsdarg.mdspathlen > 0 && nfsdarg.mdspathlen < 10000 && 3717 nfsdarg.mirrorcnt >= 1 && 3718 nfsdarg.mirrorcnt <= NFSDEV_MAXMIRRORS && 3719 nfsdarg.addr != NULL && nfsdarg.dnshost != NULL && 3720 nfsdarg.dspath != NULL && nfsdarg.mdspath != NULL) { 3721 NFSD_DEBUG(1, "addrlen=%d dspathlen=%d dnslen=%d" 3722 " mdspathlen=%d mirrorcnt=%d\n", nfsdarg.addrlen, 3723 nfsdarg.dspathlen, nfsdarg.dnshostlen, 3724 nfsdarg.mdspathlen, nfsdarg.mirrorcnt); 3725 cp = malloc(nfsdarg.addrlen + 1, M_TEMP, M_WAITOK); 3726 error = copyin(nfsdarg.addr, cp, nfsdarg.addrlen); 3727 if (error != 0) { 3728 free(cp, M_TEMP); 3729 goto out; 3730 } 3731 cp[nfsdarg.addrlen] = '\0'; /* Ensure nul term. */ 3732 nfsdarg.addr = cp; 3733 cp = malloc(nfsdarg.dnshostlen + 1, M_TEMP, M_WAITOK); 3734 error = copyin(nfsdarg.dnshost, cp, nfsdarg.dnshostlen); 3735 if (error != 0) { 3736 free(nfsdarg.addr, M_TEMP); 3737 free(cp, M_TEMP); 3738 goto out; 3739 } 3740 cp[nfsdarg.dnshostlen] = '\0'; /* Ensure nul term. */ 3741 nfsdarg.dnshost = cp; 3742 cp = malloc(nfsdarg.dspathlen + 1, M_TEMP, M_WAITOK); 3743 error = copyin(nfsdarg.dspath, cp, nfsdarg.dspathlen); 3744 if (error != 0) { 3745 free(nfsdarg.addr, M_TEMP); 3746 free(nfsdarg.dnshost, M_TEMP); 3747 free(cp, M_TEMP); 3748 goto out; 3749 } 3750 cp[nfsdarg.dspathlen] = '\0'; /* Ensure nul term. */ 3751 nfsdarg.dspath = cp; 3752 cp = malloc(nfsdarg.mdspathlen + 1, M_TEMP, M_WAITOK); 3753 error = copyin(nfsdarg.mdspath, cp, nfsdarg.mdspathlen); 3754 if (error != 0) { 3755 free(nfsdarg.addr, M_TEMP); 3756 free(nfsdarg.dnshost, M_TEMP); 3757 free(nfsdarg.dspath, M_TEMP); 3758 free(cp, M_TEMP); 3759 goto out; 3760 } 3761 cp[nfsdarg.mdspathlen] = '\0'; /* Ensure nul term. */ 3762 nfsdarg.mdspath = cp; 3763 } else { 3764 nfsdarg.addr = NULL; 3765 nfsdarg.addrlen = 0; 3766 nfsdarg.dnshost = NULL; 3767 nfsdarg.dnshostlen = 0; 3768 nfsdarg.dspath = NULL; 3769 nfsdarg.dspathlen = 0; 3770 nfsdarg.mdspath = NULL; 3771 nfsdarg.mdspathlen = 0; 3772 nfsdarg.mirrorcnt = 1; 3773 } 3774 error = nfsrvd_nfsd(td, &nfsdarg); 3775 free(nfsdarg.addr, M_TEMP); 3776 free(nfsdarg.dnshost, M_TEMP); 3777 free(nfsdarg.dspath, M_TEMP); 3778 free(nfsdarg.mdspath, M_TEMP); 3779 } else if (uap->flag & NFSSVC_PNFSDS) { 3780 error = copyin(uap->argp, &pnfsdarg, sizeof(pnfsdarg)); 3781 if (error == 0 && (pnfsdarg.op == PNFSDOP_DELDSSERVER || 3782 pnfsdarg.op == PNFSDOP_FORCEDELDS)) { 3783 cp = malloc(PATH_MAX + 1, M_TEMP, M_WAITOK); 3784 error = copyinstr(pnfsdarg.dspath, cp, PATH_MAX + 1, 3785 NULL); 3786 if (error == 0) 3787 error = nfsrv_deldsserver(pnfsdarg.op, cp, td); 3788 free(cp, M_TEMP); 3789 } else if (error == 0 && pnfsdarg.op == PNFSDOP_COPYMR) { 3790 cp = malloc(PATH_MAX + 1, M_TEMP, M_WAITOK); 3791 buflen = sizeof(*pf) * NFSDEV_MAXMIRRORS; 3792 buf = malloc(buflen, M_TEMP, M_WAITOK); 3793 error = copyinstr(pnfsdarg.mdspath, cp, PATH_MAX + 1, 3794 NULL); 3795 NFSD_DEBUG(4, "pnfsdcopymr cp mdspath=%d\n", error); 3796 if (error == 0 && pnfsdarg.dspath != NULL) { 3797 cp2 = malloc(PATH_MAX + 1, M_TEMP, M_WAITOK); 3798 error = copyinstr(pnfsdarg.dspath, cp2, 3799 PATH_MAX + 1, NULL); 3800 NFSD_DEBUG(4, "pnfsdcopymr cp dspath=%d\n", 3801 error); 3802 } else 3803 cp2 = NULL; 3804 if (error == 0 && pnfsdarg.curdspath != NULL) { 3805 cp3 = malloc(PATH_MAX + 1, M_TEMP, M_WAITOK); 3806 error = copyinstr(pnfsdarg.curdspath, cp3, 3807 PATH_MAX + 1, NULL); 3808 NFSD_DEBUG(4, "pnfsdcopymr cp curdspath=%d\n", 3809 error); 3810 } else 3811 cp3 = NULL; 3812 curdvp = NULL; 3813 fds = NULL; 3814 if (error == 0) 3815 error = nfsrv_mdscopymr(cp, cp2, cp3, buf, 3816 &buflen, fname, td, &vp, &nvp, &pf, &ds, 3817 &fds); 3818 NFSD_DEBUG(4, "nfsrv_mdscopymr=%d\n", error); 3819 if (error == 0) { 3820 if (pf->dsf_dir >= nfsrv_dsdirsize) { 3821 printf("copymr: dsdir out of range\n"); 3822 pf->dsf_dir = 0; 3823 } 3824 NFSD_DEBUG(4, "copymr: buflen=%d\n", buflen); 3825 error = nfsrv_copymr(vp, nvp, 3826 ds->nfsdev_dsdir[pf->dsf_dir], ds, pf, 3827 (struct pnfsdsfile *)buf, 3828 buflen / sizeof(*pf), td->td_ucred, td); 3829 vput(vp); 3830 vput(nvp); 3831 if (fds != NULL && error == 0) { 3832 curdvp = fds->nfsdev_dsdir[pf->dsf_dir]; 3833 ret = vn_lock(curdvp, LK_EXCLUSIVE); 3834 if (ret == 0) { 3835 nfsrv_dsremove(curdvp, fname, 3836 td->td_ucred, td); 3837 NFSVOPUNLOCK(curdvp); 3838 } 3839 } 3840 NFSD_DEBUG(4, "nfsrv_copymr=%d\n", error); 3841 } 3842 free(cp, M_TEMP); 3843 free(cp2, M_TEMP); 3844 free(cp3, M_TEMP); 3845 free(buf, M_TEMP); 3846 } 3847 } else { 3848 error = nfssvc_srvcall(td, uap, td->td_ucred); 3849 } 3850 3851 out: 3852 NFSEXITCODE(error); 3853 return (error); 3854 } 3855 3856 static int 3857 nfssvc_srvcall(struct thread *p, struct nfssvc_args *uap, struct ucred *cred) 3858 { 3859 struct nfsex_args export; 3860 struct nfsex_oldargs oexp; 3861 struct file *fp = NULL; 3862 int stablefd, i, len; 3863 struct nfsd_clid adminrevoke; 3864 struct nfsd_dumplist dumplist; 3865 struct nfsd_dumpclients *dumpclients; 3866 struct nfsd_dumplocklist dumplocklist; 3867 struct nfsd_dumplocks *dumplocks; 3868 struct nameidata nd; 3869 vnode_t vp; 3870 int error = EINVAL, igotlock; 3871 struct proc *procp; 3872 gid_t *grps; 3873 static int suspend_nfsd = 0; 3874 3875 if (uap->flag & NFSSVC_PUBLICFH) { 3876 NFSBZERO((caddr_t)&nfs_pubfh.nfsrvfh_data, 3877 sizeof (fhandle_t)); 3878 error = copyin(uap->argp, 3879 &nfs_pubfh.nfsrvfh_data, sizeof (fhandle_t)); 3880 if (!error) 3881 nfs_pubfhset = 1; 3882 } else if ((uap->flag & (NFSSVC_V4ROOTEXPORT | NFSSVC_NEWSTRUCT)) == 3883 (NFSSVC_V4ROOTEXPORT | NFSSVC_NEWSTRUCT)) { 3884 error = copyin(uap->argp,(caddr_t)&export, 3885 sizeof (struct nfsex_args)); 3886 if (!error) { 3887 grps = NULL; 3888 if (export.export.ex_ngroups > NGROUPS_MAX || 3889 export.export.ex_ngroups < 0) 3890 error = EINVAL; 3891 else if (export.export.ex_ngroups > 0) { 3892 grps = malloc(export.export.ex_ngroups * 3893 sizeof(gid_t), M_TEMP, M_WAITOK); 3894 error = copyin(export.export.ex_groups, grps, 3895 export.export.ex_ngroups * sizeof(gid_t)); 3896 export.export.ex_groups = grps; 3897 } else 3898 export.export.ex_groups = NULL; 3899 if (!error) 3900 error = nfsrv_v4rootexport(&export, cred, p); 3901 free(grps, M_TEMP); 3902 } 3903 } else if ((uap->flag & (NFSSVC_V4ROOTEXPORT | NFSSVC_NEWSTRUCT)) == 3904 NFSSVC_V4ROOTEXPORT) { 3905 error = copyin(uap->argp,(caddr_t)&oexp, 3906 sizeof (struct nfsex_oldargs)); 3907 if (!error) { 3908 memset(&export.export, 0, sizeof(export.export)); 3909 export.export.ex_flags = (uint64_t)oexp.export.ex_flags; 3910 export.export.ex_root = oexp.export.ex_root; 3911 export.export.ex_uid = oexp.export.ex_anon.cr_uid; 3912 export.export.ex_ngroups = 3913 oexp.export.ex_anon.cr_ngroups; 3914 export.export.ex_groups = NULL; 3915 if (export.export.ex_ngroups > XU_NGROUPS || 3916 export.export.ex_ngroups < 0) 3917 error = EINVAL; 3918 else if (export.export.ex_ngroups > 0) { 3919 export.export.ex_groups = malloc( 3920 export.export.ex_ngroups * sizeof(gid_t), 3921 M_TEMP, M_WAITOK); 3922 for (i = 0; i < export.export.ex_ngroups; i++) 3923 export.export.ex_groups[i] = 3924 oexp.export.ex_anon.cr_groups[i]; 3925 } 3926 export.export.ex_addr = oexp.export.ex_addr; 3927 export.export.ex_addrlen = oexp.export.ex_addrlen; 3928 export.export.ex_mask = oexp.export.ex_mask; 3929 export.export.ex_masklen = oexp.export.ex_masklen; 3930 export.export.ex_indexfile = oexp.export.ex_indexfile; 3931 export.export.ex_numsecflavors = 3932 oexp.export.ex_numsecflavors; 3933 if (export.export.ex_numsecflavors >= MAXSECFLAVORS || 3934 export.export.ex_numsecflavors < 0) 3935 error = EINVAL; 3936 else { 3937 for (i = 0; i < export.export.ex_numsecflavors; 3938 i++) 3939 export.export.ex_secflavors[i] = 3940 oexp.export.ex_secflavors[i]; 3941 } 3942 export.fspec = oexp.fspec; 3943 if (error == 0) 3944 error = nfsrv_v4rootexport(&export, cred, p); 3945 free(export.export.ex_groups, M_TEMP); 3946 } 3947 } else if (uap->flag & NFSSVC_NOPUBLICFH) { 3948 nfs_pubfhset = 0; 3949 error = 0; 3950 } else if (uap->flag & NFSSVC_STABLERESTART) { 3951 error = copyin(uap->argp, (caddr_t)&stablefd, 3952 sizeof (int)); 3953 if (!error) 3954 error = fp_getfvp(p, stablefd, &fp, &vp); 3955 if (!error && (NFSFPFLAG(fp) & (FREAD | FWRITE)) != (FREAD | FWRITE)) 3956 error = EBADF; 3957 if (!error && newnfs_numnfsd != 0) 3958 error = EPERM; 3959 if (!error) { 3960 nfsrv_stablefirst.nsf_fp = fp; 3961 nfsrv_setupstable(p); 3962 } 3963 } else if (uap->flag & NFSSVC_ADMINREVOKE) { 3964 error = copyin(uap->argp, (caddr_t)&adminrevoke, 3965 sizeof (struct nfsd_clid)); 3966 if (!error) 3967 error = nfsrv_adminrevoke(&adminrevoke, p); 3968 } else if (uap->flag & NFSSVC_DUMPCLIENTS) { 3969 error = copyin(uap->argp, (caddr_t)&dumplist, 3970 sizeof (struct nfsd_dumplist)); 3971 if (!error && (dumplist.ndl_size < 1 || 3972 dumplist.ndl_size > NFSRV_MAXDUMPLIST)) 3973 error = EPERM; 3974 if (!error) { 3975 len = sizeof (struct nfsd_dumpclients) * dumplist.ndl_size; 3976 dumpclients = malloc(len, M_TEMP, M_WAITOK | M_ZERO); 3977 nfsrv_dumpclients(dumpclients, dumplist.ndl_size); 3978 error = copyout(dumpclients, dumplist.ndl_list, len); 3979 free(dumpclients, M_TEMP); 3980 } 3981 } else if (uap->flag & NFSSVC_DUMPLOCKS) { 3982 error = copyin(uap->argp, (caddr_t)&dumplocklist, 3983 sizeof (struct nfsd_dumplocklist)); 3984 if (!error && (dumplocklist.ndllck_size < 1 || 3985 dumplocklist.ndllck_size > NFSRV_MAXDUMPLIST)) 3986 error = EPERM; 3987 if (!error) 3988 error = nfsrv_lookupfilename(&nd, 3989 dumplocklist.ndllck_fname, p); 3990 if (!error) { 3991 len = sizeof (struct nfsd_dumplocks) * 3992 dumplocklist.ndllck_size; 3993 dumplocks = malloc(len, M_TEMP, M_WAITOK | M_ZERO); 3994 nfsrv_dumplocks(nd.ni_vp, dumplocks, 3995 dumplocklist.ndllck_size, p); 3996 vput(nd.ni_vp); 3997 error = copyout(dumplocks, dumplocklist.ndllck_list, 3998 len); 3999 free(dumplocks, M_TEMP); 4000 } 4001 } else if (uap->flag & NFSSVC_BACKUPSTABLE) { 4002 procp = p->td_proc; 4003 PROC_LOCK(procp); 4004 nfsd_master_pid = procp->p_pid; 4005 bcopy(procp->p_comm, nfsd_master_comm, MAXCOMLEN + 1); 4006 nfsd_master_start = procp->p_stats->p_start; 4007 nfsd_master_proc = procp; 4008 PROC_UNLOCK(procp); 4009 } else if ((uap->flag & NFSSVC_SUSPENDNFSD) != 0) { 4010 NFSLOCKV4ROOTMUTEX(); 4011 if (suspend_nfsd == 0) { 4012 /* Lock out all nfsd threads */ 4013 do { 4014 igotlock = nfsv4_lock(&nfsd_suspend_lock, 1, 4015 NULL, NFSV4ROOTLOCKMUTEXPTR, NULL); 4016 } while (igotlock == 0 && suspend_nfsd == 0); 4017 suspend_nfsd = 1; 4018 } 4019 NFSUNLOCKV4ROOTMUTEX(); 4020 error = 0; 4021 } else if ((uap->flag & NFSSVC_RESUMENFSD) != 0) { 4022 NFSLOCKV4ROOTMUTEX(); 4023 if (suspend_nfsd != 0) { 4024 nfsv4_unlock(&nfsd_suspend_lock, 0); 4025 suspend_nfsd = 0; 4026 } 4027 NFSUNLOCKV4ROOTMUTEX(); 4028 error = 0; 4029 } 4030 4031 NFSEXITCODE(error); 4032 return (error); 4033 } 4034 4035 /* 4036 * Check exports. 4037 * Returns 0 if ok, 1 otherwise. 4038 */ 4039 int 4040 nfsvno_testexp(struct nfsrv_descript *nd, struct nfsexstuff *exp) 4041 { 4042 int i; 4043 4044 /* 4045 * Allow NFSv3 Fsinfo per RFC2623. 4046 */ 4047 if (((nd->nd_flag & ND_NFSV4) != 0 || 4048 nd->nd_procnum != NFSPROC_FSINFO) && 4049 ((NFSVNO_EXTLS(exp) && (nd->nd_flag & ND_TLS) == 0) || 4050 (NFSVNO_EXTLSCERT(exp) && 4051 (nd->nd_flag & ND_TLSCERT) == 0) || 4052 (NFSVNO_EXTLSCERTUSER(exp) && 4053 (nd->nd_flag & ND_TLSCERTUSER) == 0))) { 4054 if ((nd->nd_flag & ND_NFSV4) != 0) 4055 return (NFSERR_WRONGSEC); 4056 #ifdef notnow 4057 /* There is currently no auth_stat for this. */ 4058 else if ((nd->nd_flag & ND_TLS) == 0) 4059 return (NFSERR_AUTHERR | AUTH_NEEDS_TLS); 4060 else 4061 return (NFSERR_AUTHERR | AUTH_NEEDS_TLS_MUTUAL_HOST); 4062 #endif 4063 else 4064 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 4065 } 4066 4067 /* 4068 * This seems odd, but allow the case where the security flavor 4069 * list is empty. This happens when NFSv4 is traversing non-exported 4070 * file systems. Exported file systems should always have a non-empty 4071 * security flavor list. 4072 */ 4073 if (exp->nes_numsecflavor == 0) 4074 return (0); 4075 4076 for (i = 0; i < exp->nes_numsecflavor; i++) { 4077 /* 4078 * The tests for privacy and integrity must be first, 4079 * since ND_GSS is set for everything but AUTH_SYS. 4080 */ 4081 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5P && 4082 (nd->nd_flag & ND_GSSPRIVACY)) 4083 return (0); 4084 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5I && 4085 (nd->nd_flag & ND_GSSINTEGRITY)) 4086 return (0); 4087 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5 && 4088 (nd->nd_flag & ND_GSS)) 4089 return (0); 4090 if (exp->nes_secflavors[i] == AUTH_SYS && 4091 (nd->nd_flag & ND_GSS) == 0) 4092 return (0); 4093 } 4094 if ((nd->nd_flag & ND_NFSV4) != 0) 4095 return (NFSERR_WRONGSEC); 4096 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 4097 } 4098 4099 /* 4100 * Calculate a hash value for the fid in a file handle. 4101 */ 4102 uint32_t 4103 nfsrv_hashfh(fhandle_t *fhp) 4104 { 4105 uint32_t hashval; 4106 4107 hashval = hash32_buf(&fhp->fh_fid, sizeof(struct fid), 0); 4108 return (hashval); 4109 } 4110 4111 /* 4112 * Calculate a hash value for the sessionid. 4113 */ 4114 uint32_t 4115 nfsrv_hashsessionid(uint8_t *sessionid) 4116 { 4117 uint32_t hashval; 4118 4119 hashval = hash32_buf(sessionid, NFSX_V4SESSIONID, 0); 4120 return (hashval); 4121 } 4122 4123 /* 4124 * Signal the userland master nfsd to backup the stable restart file. 4125 */ 4126 void 4127 nfsrv_backupstable(void) 4128 { 4129 struct proc *procp; 4130 4131 if (nfsd_master_proc != NULL) { 4132 procp = pfind(nfsd_master_pid); 4133 /* Try to make sure it is the correct process. */ 4134 if (procp == nfsd_master_proc && 4135 procp->p_stats->p_start.tv_sec == 4136 nfsd_master_start.tv_sec && 4137 procp->p_stats->p_start.tv_usec == 4138 nfsd_master_start.tv_usec && 4139 strcmp(procp->p_comm, nfsd_master_comm) == 0) 4140 kern_psignal(procp, SIGUSR2); 4141 else 4142 nfsd_master_proc = NULL; 4143 4144 if (procp != NULL) 4145 PROC_UNLOCK(procp); 4146 } 4147 } 4148 4149 /* 4150 * Create a DS data file for nfsrv_pnfscreate(). Called for each mirror. 4151 * The arguments are in a structure, so that they can be passed through 4152 * taskqueue for a kernel process to execute this function. 4153 */ 4154 struct nfsrvdscreate { 4155 int done; 4156 int inprog; 4157 struct task tsk; 4158 struct ucred *tcred; 4159 struct vnode *dvp; 4160 NFSPROC_T *p; 4161 struct pnfsdsfile *pf; 4162 int err; 4163 fhandle_t fh; 4164 struct vattr va; 4165 struct vattr createva; 4166 }; 4167 4168 int 4169 nfsrv_dscreate(struct vnode *dvp, struct vattr *vap, struct vattr *nvap, 4170 fhandle_t *fhp, struct pnfsdsfile *pf, struct pnfsdsattr *dsa, 4171 char *fnamep, struct ucred *tcred, NFSPROC_T *p, struct vnode **nvpp) 4172 { 4173 struct vnode *nvp; 4174 struct nameidata named; 4175 struct vattr va; 4176 char *bufp; 4177 u_long *hashp; 4178 struct nfsnode *np; 4179 struct nfsmount *nmp; 4180 int error; 4181 4182 NFSNAMEICNDSET(&named.ni_cnd, tcred, CREATE, 4183 LOCKPARENT | LOCKLEAF | SAVESTART | NOCACHE); 4184 nfsvno_setpathbuf(&named, &bufp, &hashp); 4185 named.ni_cnd.cn_lkflags = LK_EXCLUSIVE; 4186 named.ni_cnd.cn_nameptr = bufp; 4187 if (fnamep != NULL) { 4188 strlcpy(bufp, fnamep, PNFS_FILENAME_LEN + 1); 4189 named.ni_cnd.cn_namelen = strlen(bufp); 4190 } else 4191 named.ni_cnd.cn_namelen = nfsrv_putfhname(fhp, bufp); 4192 NFSD_DEBUG(4, "nfsrv_dscreate: dvp=%p fname=%s\n", dvp, bufp); 4193 4194 /* Create the date file in the DS mount. */ 4195 error = NFSVOPLOCK(dvp, LK_EXCLUSIVE); 4196 if (error == 0) { 4197 error = VOP_CREATE(dvp, &nvp, &named.ni_cnd, vap); 4198 vref(dvp); 4199 VOP_VPUT_PAIR(dvp, error == 0 ? &nvp : NULL, false); 4200 if (error == 0) { 4201 /* Set the ownership of the file. */ 4202 error = VOP_SETATTR(nvp, nvap, tcred); 4203 NFSD_DEBUG(4, "nfsrv_dscreate:" 4204 " setattr-uid=%d\n", error); 4205 if (error != 0) 4206 vput(nvp); 4207 } 4208 if (error != 0) 4209 printf("pNFS: pnfscreate failed=%d\n", error); 4210 } else 4211 printf("pNFS: pnfscreate vnlock=%d\n", error); 4212 if (error == 0) { 4213 np = VTONFS(nvp); 4214 nmp = VFSTONFS(nvp->v_mount); 4215 if (strcmp(nvp->v_mount->mnt_vfc->vfc_name, "nfs") 4216 != 0 || nmp->nm_nam->sa_len > sizeof( 4217 struct sockaddr_in6) || 4218 np->n_fhp->nfh_len != NFSX_MYFH) { 4219 printf("Bad DS file: fstype=%s salen=%d" 4220 " fhlen=%d\n", 4221 nvp->v_mount->mnt_vfc->vfc_name, 4222 nmp->nm_nam->sa_len, np->n_fhp->nfh_len); 4223 error = ENOENT; 4224 } 4225 4226 /* Set extattrs for the DS on the MDS file. */ 4227 if (error == 0) { 4228 if (dsa != NULL) { 4229 error = VOP_GETATTR(nvp, &va, tcred); 4230 if (error == 0) { 4231 dsa->dsa_filerev = va.va_filerev; 4232 dsa->dsa_size = va.va_size; 4233 dsa->dsa_atime = va.va_atime; 4234 dsa->dsa_mtime = va.va_mtime; 4235 dsa->dsa_bytes = va.va_bytes; 4236 } 4237 } 4238 if (error == 0) { 4239 NFSBCOPY(np->n_fhp->nfh_fh, &pf->dsf_fh, 4240 NFSX_MYFH); 4241 NFSBCOPY(nmp->nm_nam, &pf->dsf_sin, 4242 nmp->nm_nam->sa_len); 4243 NFSBCOPY(named.ni_cnd.cn_nameptr, 4244 pf->dsf_filename, 4245 sizeof(pf->dsf_filename)); 4246 } 4247 } else 4248 printf("pNFS: pnfscreate can't get DS" 4249 " attr=%d\n", error); 4250 if (nvpp != NULL && error == 0) 4251 *nvpp = nvp; 4252 else 4253 vput(nvp); 4254 } 4255 nfsvno_relpathbuf(&named); 4256 return (error); 4257 } 4258 4259 /* 4260 * Start up the thread that will execute nfsrv_dscreate(). 4261 */ 4262 static void 4263 start_dscreate(void *arg, int pending) 4264 { 4265 struct nfsrvdscreate *dsc; 4266 4267 dsc = (struct nfsrvdscreate *)arg; 4268 dsc->err = nfsrv_dscreate(dsc->dvp, &dsc->createva, &dsc->va, &dsc->fh, 4269 dsc->pf, NULL, NULL, dsc->tcred, dsc->p, NULL); 4270 dsc->done = 1; 4271 NFSD_DEBUG(4, "start_dscreate: err=%d\n", dsc->err); 4272 } 4273 4274 /* 4275 * Create a pNFS data file on the Data Server(s). 4276 */ 4277 static void 4278 nfsrv_pnfscreate(struct vnode *vp, struct vattr *vap, struct ucred *cred, 4279 NFSPROC_T *p) 4280 { 4281 struct nfsrvdscreate *dsc, *tdsc = NULL; 4282 struct nfsdevice *ds, *tds, *fds; 4283 struct mount *mp; 4284 struct pnfsdsfile *pf, *tpf; 4285 struct pnfsdsattr dsattr; 4286 struct vattr va; 4287 struct vnode *dvp[NFSDEV_MAXMIRRORS]; 4288 struct nfsmount *nmp; 4289 fhandle_t fh; 4290 uid_t vauid; 4291 gid_t vagid; 4292 u_short vamode; 4293 struct ucred *tcred; 4294 int dsdir[NFSDEV_MAXMIRRORS], error, i, mirrorcnt, ret; 4295 int failpos, timo; 4296 4297 /* Get a DS server directory in a round-robin order. */ 4298 mirrorcnt = 1; 4299 mp = vp->v_mount; 4300 ds = fds = NULL; 4301 NFSDDSLOCK(); 4302 /* 4303 * Search for the first entry that handles this MDS fs, but use the 4304 * first entry for all MDS fs's otherwise. 4305 */ 4306 TAILQ_FOREACH(tds, &nfsrv_devidhead, nfsdev_list) { 4307 if (tds->nfsdev_nmp != NULL) { 4308 if (tds->nfsdev_mdsisset == 0 && ds == NULL) 4309 ds = tds; 4310 else if (tds->nfsdev_mdsisset != 0 && fsidcmp( 4311 &mp->mnt_stat.f_fsid, &tds->nfsdev_mdsfsid) == 0) { 4312 ds = fds = tds; 4313 break; 4314 } 4315 } 4316 } 4317 if (ds == NULL) { 4318 NFSDDSUNLOCK(); 4319 NFSD_DEBUG(4, "nfsrv_pnfscreate: no srv\n"); 4320 return; 4321 } 4322 i = dsdir[0] = ds->nfsdev_nextdir; 4323 ds->nfsdev_nextdir = (ds->nfsdev_nextdir + 1) % nfsrv_dsdirsize; 4324 dvp[0] = ds->nfsdev_dsdir[i]; 4325 tds = TAILQ_NEXT(ds, nfsdev_list); 4326 if (nfsrv_maxpnfsmirror > 1 && tds != NULL) { 4327 TAILQ_FOREACH_FROM(tds, &nfsrv_devidhead, nfsdev_list) { 4328 if (tds->nfsdev_nmp != NULL && 4329 ((tds->nfsdev_mdsisset == 0 && fds == NULL) || 4330 (tds->nfsdev_mdsisset != 0 && fds != NULL && 4331 fsidcmp(&mp->mnt_stat.f_fsid, 4332 &tds->nfsdev_mdsfsid) == 0))) { 4333 dsdir[mirrorcnt] = i; 4334 dvp[mirrorcnt] = tds->nfsdev_dsdir[i]; 4335 mirrorcnt++; 4336 if (mirrorcnt >= nfsrv_maxpnfsmirror) 4337 break; 4338 } 4339 } 4340 } 4341 /* Put at end of list to implement round-robin usage. */ 4342 TAILQ_REMOVE(&nfsrv_devidhead, ds, nfsdev_list); 4343 TAILQ_INSERT_TAIL(&nfsrv_devidhead, ds, nfsdev_list); 4344 NFSDDSUNLOCK(); 4345 dsc = NULL; 4346 if (mirrorcnt > 1) 4347 tdsc = dsc = malloc(sizeof(*dsc) * (mirrorcnt - 1), M_TEMP, 4348 M_WAITOK | M_ZERO); 4349 tpf = pf = malloc(sizeof(*pf) * nfsrv_maxpnfsmirror, M_TEMP, M_WAITOK | 4350 M_ZERO); 4351 4352 error = nfsvno_getfh(vp, &fh, p); 4353 if (error == 0) 4354 error = VOP_GETATTR(vp, &va, cred); 4355 if (error == 0) { 4356 /* Set the attributes for "vp" to Setattr the DS vp. */ 4357 vauid = va.va_uid; 4358 vagid = va.va_gid; 4359 vamode = va.va_mode; 4360 VATTR_NULL(&va); 4361 va.va_uid = vauid; 4362 va.va_gid = vagid; 4363 va.va_mode = vamode; 4364 va.va_size = 0; 4365 } else 4366 printf("pNFS: pnfscreate getfh+attr=%d\n", error); 4367 4368 NFSD_DEBUG(4, "nfsrv_pnfscreate: cruid=%d crgid=%d\n", cred->cr_uid, 4369 cred->cr_gid); 4370 /* Make data file name based on FH. */ 4371 tcred = newnfs_getcred(); 4372 4373 /* 4374 * Create the file on each DS mirror, using kernel process(es) for the 4375 * additional mirrors. 4376 */ 4377 failpos = -1; 4378 for (i = 0; i < mirrorcnt - 1 && error == 0; i++, tpf++, tdsc++) { 4379 tpf->dsf_dir = dsdir[i]; 4380 tdsc->tcred = tcred; 4381 tdsc->p = p; 4382 tdsc->pf = tpf; 4383 tdsc->createva = *vap; 4384 NFSBCOPY(&fh, &tdsc->fh, sizeof(fh)); 4385 tdsc->va = va; 4386 tdsc->dvp = dvp[i]; 4387 tdsc->done = 0; 4388 tdsc->inprog = 0; 4389 tdsc->err = 0; 4390 ret = EIO; 4391 if (nfs_pnfsiothreads != 0) { 4392 ret = nfs_pnfsio(start_dscreate, tdsc); 4393 NFSD_DEBUG(4, "nfsrv_pnfscreate: nfs_pnfsio=%d\n", ret); 4394 } 4395 if (ret != 0) { 4396 ret = nfsrv_dscreate(dvp[i], vap, &va, &fh, tpf, NULL, 4397 NULL, tcred, p, NULL); 4398 if (ret != 0) { 4399 KASSERT(error == 0, ("nfsrv_dscreate err=%d", 4400 error)); 4401 if (failpos == -1 && nfsds_failerr(ret)) 4402 failpos = i; 4403 else 4404 error = ret; 4405 } 4406 } 4407 } 4408 if (error == 0) { 4409 tpf->dsf_dir = dsdir[mirrorcnt - 1]; 4410 error = nfsrv_dscreate(dvp[mirrorcnt - 1], vap, &va, &fh, tpf, 4411 &dsattr, NULL, tcred, p, NULL); 4412 if (failpos == -1 && mirrorcnt > 1 && nfsds_failerr(error)) { 4413 failpos = mirrorcnt - 1; 4414 error = 0; 4415 } 4416 } 4417 timo = hz / 50; /* Wait for 20msec. */ 4418 if (timo < 1) 4419 timo = 1; 4420 /* Wait for kernel task(s) to complete. */ 4421 for (tdsc = dsc, i = 0; i < mirrorcnt - 1; i++, tdsc++) { 4422 while (tdsc->inprog != 0 && tdsc->done == 0) 4423 tsleep(&tdsc->tsk, PVFS, "srvdcr", timo); 4424 if (tdsc->err != 0) { 4425 if (failpos == -1 && nfsds_failerr(tdsc->err)) 4426 failpos = i; 4427 else if (error == 0) 4428 error = tdsc->err; 4429 } 4430 } 4431 4432 /* 4433 * If failpos has been set, that mirror has failed, so it needs 4434 * to be disabled. 4435 */ 4436 if (failpos >= 0) { 4437 nmp = VFSTONFS(dvp[failpos]->v_mount); 4438 NFSLOCKMNT(nmp); 4439 if ((nmp->nm_privflag & (NFSMNTP_FORCEDISM | 4440 NFSMNTP_CANCELRPCS)) == 0) { 4441 nmp->nm_privflag |= NFSMNTP_CANCELRPCS; 4442 NFSUNLOCKMNT(nmp); 4443 ds = nfsrv_deldsnmp(PNFSDOP_DELDSSERVER, nmp, p); 4444 NFSD_DEBUG(4, "dscreatfail fail=%d ds=%p\n", failpos, 4445 ds); 4446 if (ds != NULL) 4447 nfsrv_killrpcs(nmp); 4448 NFSLOCKMNT(nmp); 4449 nmp->nm_privflag &= ~NFSMNTP_CANCELRPCS; 4450 wakeup(nmp); 4451 } 4452 NFSUNLOCKMNT(nmp); 4453 } 4454 4455 NFSFREECRED(tcred); 4456 if (error == 0) { 4457 ASSERT_VOP_ELOCKED(vp, "nfsrv_pnfscreate vp"); 4458 4459 NFSD_DEBUG(4, "nfsrv_pnfscreate: mirrorcnt=%d maxmirror=%d\n", 4460 mirrorcnt, nfsrv_maxpnfsmirror); 4461 /* 4462 * For all mirrors that couldn't be created, fill in the 4463 * *pf structure, but with an IP address == 0.0.0.0. 4464 */ 4465 tpf = pf + mirrorcnt; 4466 for (i = mirrorcnt; i < nfsrv_maxpnfsmirror; i++, tpf++) { 4467 *tpf = *pf; 4468 tpf->dsf_sin.sin_family = AF_INET; 4469 tpf->dsf_sin.sin_len = sizeof(struct sockaddr_in); 4470 tpf->dsf_sin.sin_addr.s_addr = 0; 4471 tpf->dsf_sin.sin_port = 0; 4472 } 4473 4474 error = vn_extattr_set(vp, IO_NODELOCKED, 4475 EXTATTR_NAMESPACE_SYSTEM, "pnfsd.dsfile", 4476 sizeof(*pf) * nfsrv_maxpnfsmirror, (char *)pf, p); 4477 if (error == 0) 4478 error = vn_extattr_set(vp, IO_NODELOCKED, 4479 EXTATTR_NAMESPACE_SYSTEM, "pnfsd.dsattr", 4480 sizeof(dsattr), (char *)&dsattr, p); 4481 if (error != 0) 4482 printf("pNFS: pnfscreate setextattr=%d\n", 4483 error); 4484 } else 4485 printf("pNFS: pnfscreate=%d\n", error); 4486 free(pf, M_TEMP); 4487 free(dsc, M_TEMP); 4488 } 4489 4490 /* 4491 * Get the information needed to remove the pNFS Data Server file from the 4492 * Metadata file. Upon success, ddvp is set non-NULL to the locked 4493 * DS directory vnode. The caller must unlock *ddvp when done with it. 4494 */ 4495 static void 4496 nfsrv_pnfsremovesetup(struct vnode *vp, NFSPROC_T *p, struct vnode **dvpp, 4497 int *mirrorcntp, char *fname, fhandle_t *fhp) 4498 { 4499 struct vattr va; 4500 struct ucred *tcred; 4501 char *buf; 4502 int buflen, error; 4503 4504 dvpp[0] = NULL; 4505 /* If not an exported regular file or not a pNFS server, just return. */ 4506 if (vp->v_type != VREG || (vp->v_mount->mnt_flag & MNT_EXPORTED) == 0 || 4507 nfsrv_devidcnt == 0) 4508 return; 4509 4510 /* Check to see if this is the last hard link. */ 4511 tcred = newnfs_getcred(); 4512 error = VOP_GETATTR(vp, &va, tcred); 4513 NFSFREECRED(tcred); 4514 if (error != 0) { 4515 printf("pNFS: nfsrv_pnfsremovesetup getattr=%d\n", error); 4516 return; 4517 } 4518 if (va.va_nlink > 1) 4519 return; 4520 4521 error = nfsvno_getfh(vp, fhp, p); 4522 if (error != 0) { 4523 printf("pNFS: nfsrv_pnfsremovesetup getfh=%d\n", error); 4524 return; 4525 } 4526 4527 buflen = 1024; 4528 buf = malloc(buflen, M_TEMP, M_WAITOK); 4529 /* Get the directory vnode for the DS mount and the file handle. */ 4530 error = nfsrv_dsgetsockmnt(vp, 0, buf, &buflen, mirrorcntp, p, dvpp, 4531 NULL, NULL, fname, NULL, NULL, NULL, NULL, NULL); 4532 free(buf, M_TEMP); 4533 if (error != 0) 4534 printf("pNFS: nfsrv_pnfsremovesetup getsockmnt=%d\n", error); 4535 } 4536 4537 /* 4538 * Remove a DS data file for nfsrv_pnfsremove(). Called for each mirror. 4539 * The arguments are in a structure, so that they can be passed through 4540 * taskqueue for a kernel process to execute this function. 4541 */ 4542 struct nfsrvdsremove { 4543 int done; 4544 int inprog; 4545 struct task tsk; 4546 struct ucred *tcred; 4547 struct vnode *dvp; 4548 NFSPROC_T *p; 4549 int err; 4550 char fname[PNFS_FILENAME_LEN + 1]; 4551 }; 4552 4553 static int 4554 nfsrv_dsremove(struct vnode *dvp, char *fname, struct ucred *tcred, 4555 NFSPROC_T *p) 4556 { 4557 struct nameidata named; 4558 struct vnode *nvp; 4559 char *bufp; 4560 u_long *hashp; 4561 int error; 4562 4563 error = NFSVOPLOCK(dvp, LK_EXCLUSIVE); 4564 if (error != 0) 4565 return (error); 4566 named.ni_cnd.cn_nameiop = DELETE; 4567 named.ni_cnd.cn_lkflags = LK_EXCLUSIVE | LK_RETRY; 4568 named.ni_cnd.cn_cred = tcred; 4569 named.ni_cnd.cn_flags = ISLASTCN | LOCKPARENT | LOCKLEAF | SAVENAME; 4570 nfsvno_setpathbuf(&named, &bufp, &hashp); 4571 named.ni_cnd.cn_nameptr = bufp; 4572 named.ni_cnd.cn_namelen = strlen(fname); 4573 strlcpy(bufp, fname, NAME_MAX); 4574 NFSD_DEBUG(4, "nfsrv_pnfsremove: filename=%s\n", bufp); 4575 error = VOP_LOOKUP(dvp, &nvp, &named.ni_cnd); 4576 NFSD_DEBUG(4, "nfsrv_pnfsremove: aft LOOKUP=%d\n", error); 4577 if (error == 0) { 4578 error = VOP_REMOVE(dvp, nvp, &named.ni_cnd); 4579 vput(nvp); 4580 } 4581 NFSVOPUNLOCK(dvp); 4582 nfsvno_relpathbuf(&named); 4583 if (error != 0) 4584 printf("pNFS: nfsrv_pnfsremove failed=%d\n", error); 4585 return (error); 4586 } 4587 4588 /* 4589 * Start up the thread that will execute nfsrv_dsremove(). 4590 */ 4591 static void 4592 start_dsremove(void *arg, int pending) 4593 { 4594 struct nfsrvdsremove *dsrm; 4595 4596 dsrm = (struct nfsrvdsremove *)arg; 4597 dsrm->err = nfsrv_dsremove(dsrm->dvp, dsrm->fname, dsrm->tcred, 4598 dsrm->p); 4599 dsrm->done = 1; 4600 NFSD_DEBUG(4, "start_dsremove: err=%d\n", dsrm->err); 4601 } 4602 4603 /* 4604 * Remove a pNFS data file from a Data Server. 4605 * nfsrv_pnfsremovesetup() must have been called before the MDS file was 4606 * removed to set up the dvp and fill in the FH. 4607 */ 4608 static void 4609 nfsrv_pnfsremove(struct vnode **dvp, int mirrorcnt, char *fname, fhandle_t *fhp, 4610 NFSPROC_T *p) 4611 { 4612 struct ucred *tcred; 4613 struct nfsrvdsremove *dsrm, *tdsrm; 4614 struct nfsdevice *ds; 4615 struct nfsmount *nmp; 4616 int failpos, i, ret, timo; 4617 4618 tcred = newnfs_getcred(); 4619 dsrm = NULL; 4620 if (mirrorcnt > 1) 4621 dsrm = malloc(sizeof(*dsrm) * mirrorcnt - 1, M_TEMP, M_WAITOK); 4622 /* 4623 * Remove the file on each DS mirror, using kernel process(es) for the 4624 * additional mirrors. 4625 */ 4626 failpos = -1; 4627 for (tdsrm = dsrm, i = 0; i < mirrorcnt - 1; i++, tdsrm++) { 4628 tdsrm->tcred = tcred; 4629 tdsrm->p = p; 4630 tdsrm->dvp = dvp[i]; 4631 strlcpy(tdsrm->fname, fname, PNFS_FILENAME_LEN + 1); 4632 tdsrm->inprog = 0; 4633 tdsrm->done = 0; 4634 tdsrm->err = 0; 4635 ret = EIO; 4636 if (nfs_pnfsiothreads != 0) { 4637 ret = nfs_pnfsio(start_dsremove, tdsrm); 4638 NFSD_DEBUG(4, "nfsrv_pnfsremove: nfs_pnfsio=%d\n", ret); 4639 } 4640 if (ret != 0) { 4641 ret = nfsrv_dsremove(dvp[i], fname, tcred, p); 4642 if (failpos == -1 && nfsds_failerr(ret)) 4643 failpos = i; 4644 } 4645 } 4646 ret = nfsrv_dsremove(dvp[mirrorcnt - 1], fname, tcred, p); 4647 if (failpos == -1 && mirrorcnt > 1 && nfsds_failerr(ret)) 4648 failpos = mirrorcnt - 1; 4649 timo = hz / 50; /* Wait for 20msec. */ 4650 if (timo < 1) 4651 timo = 1; 4652 /* Wait for kernel task(s) to complete. */ 4653 for (tdsrm = dsrm, i = 0; i < mirrorcnt - 1; i++, tdsrm++) { 4654 while (tdsrm->inprog != 0 && tdsrm->done == 0) 4655 tsleep(&tdsrm->tsk, PVFS, "srvdsrm", timo); 4656 if (failpos == -1 && nfsds_failerr(tdsrm->err)) 4657 failpos = i; 4658 } 4659 4660 /* 4661 * If failpos has been set, that mirror has failed, so it needs 4662 * to be disabled. 4663 */ 4664 if (failpos >= 0) { 4665 nmp = VFSTONFS(dvp[failpos]->v_mount); 4666 NFSLOCKMNT(nmp); 4667 if ((nmp->nm_privflag & (NFSMNTP_FORCEDISM | 4668 NFSMNTP_CANCELRPCS)) == 0) { 4669 nmp->nm_privflag |= NFSMNTP_CANCELRPCS; 4670 NFSUNLOCKMNT(nmp); 4671 ds = nfsrv_deldsnmp(PNFSDOP_DELDSSERVER, nmp, p); 4672 NFSD_DEBUG(4, "dsremovefail fail=%d ds=%p\n", failpos, 4673 ds); 4674 if (ds != NULL) 4675 nfsrv_killrpcs(nmp); 4676 NFSLOCKMNT(nmp); 4677 nmp->nm_privflag &= ~NFSMNTP_CANCELRPCS; 4678 wakeup(nmp); 4679 } 4680 NFSUNLOCKMNT(nmp); 4681 } 4682 4683 /* Get rid all layouts for the file. */ 4684 nfsrv_freefilelayouts(fhp); 4685 4686 NFSFREECRED(tcred); 4687 free(dsrm, M_TEMP); 4688 } 4689 4690 /* 4691 * Generate a file name based on the file handle and put it in *bufp. 4692 * Return the number of bytes generated. 4693 */ 4694 static int 4695 nfsrv_putfhname(fhandle_t *fhp, char *bufp) 4696 { 4697 int i; 4698 uint8_t *cp; 4699 const uint8_t *hexdigits = "0123456789abcdef"; 4700 4701 cp = (uint8_t *)fhp; 4702 for (i = 0; i < sizeof(*fhp); i++) { 4703 bufp[2 * i] = hexdigits[(*cp >> 4) & 0xf]; 4704 bufp[2 * i + 1] = hexdigits[*cp++ & 0xf]; 4705 } 4706 bufp[2 * i] = '\0'; 4707 return (2 * i); 4708 } 4709 4710 /* 4711 * Update the Metadata file's attributes from the DS file when a Read/Write 4712 * layout is returned. 4713 * Basically just call nfsrv_proxyds() with procedure == NFSPROC_LAYOUTRETURN 4714 * so that it does a nfsrv_getattrdsrpc() and nfsrv_setextattr() on the DS file. 4715 */ 4716 int 4717 nfsrv_updatemdsattr(struct vnode *vp, struct nfsvattr *nap, NFSPROC_T *p) 4718 { 4719 struct ucred *tcred; 4720 int error; 4721 4722 /* Do this as root so that it won't fail with EACCES. */ 4723 tcred = newnfs_getcred(); 4724 error = nfsrv_proxyds(vp, 0, 0, tcred, p, NFSPROC_LAYOUTRETURN, 4725 NULL, NULL, NULL, nap, NULL, NULL, 0, NULL); 4726 NFSFREECRED(tcred); 4727 return (error); 4728 } 4729 4730 /* 4731 * Set the NFSv4 ACL on the DS file to the same ACL as the MDS file. 4732 */ 4733 static int 4734 nfsrv_dssetacl(struct vnode *vp, struct acl *aclp, struct ucred *cred, 4735 NFSPROC_T *p) 4736 { 4737 int error; 4738 4739 error = nfsrv_proxyds(vp, 0, 0, cred, p, NFSPROC_SETACL, 4740 NULL, NULL, NULL, NULL, aclp, NULL, 0, NULL); 4741 return (error); 4742 } 4743 4744 static int 4745 nfsrv_proxyds(struct vnode *vp, off_t off, int cnt, struct ucred *cred, 4746 struct thread *p, int ioproc, struct mbuf **mpp, char *cp, 4747 struct mbuf **mpp2, struct nfsvattr *nap, struct acl *aclp, 4748 off_t *offp, int content, bool *eofp) 4749 { 4750 struct nfsmount *nmp[NFSDEV_MAXMIRRORS], *failnmp; 4751 fhandle_t fh[NFSDEV_MAXMIRRORS]; 4752 struct vnode *dvp[NFSDEV_MAXMIRRORS]; 4753 struct nfsdevice *ds; 4754 struct pnfsdsattr dsattr; 4755 struct opnfsdsattr odsattr; 4756 char *buf; 4757 int buflen, error, failpos, i, mirrorcnt, origmircnt, trycnt; 4758 4759 NFSD_DEBUG(4, "in nfsrv_proxyds\n"); 4760 /* 4761 * If not a regular file, not exported or not a pNFS server, 4762 * just return ENOENT. 4763 */ 4764 if (vp->v_type != VREG || (vp->v_mount->mnt_flag & MNT_EXPORTED) == 0 || 4765 nfsrv_devidcnt == 0) 4766 return (ENOENT); 4767 4768 buflen = 1024; 4769 buf = malloc(buflen, M_TEMP, M_WAITOK); 4770 error = 0; 4771 4772 /* 4773 * For Getattr, get the Change attribute (va_filerev) and size (va_size) 4774 * from the MetaData file's extended attribute. 4775 */ 4776 if (ioproc == NFSPROC_GETATTR) { 4777 error = vn_extattr_get(vp, IO_NODELOCKED, 4778 EXTATTR_NAMESPACE_SYSTEM, "pnfsd.dsattr", &buflen, buf, 4779 p); 4780 if (error == 0) { 4781 if (buflen == sizeof(odsattr)) { 4782 NFSBCOPY(buf, &odsattr, buflen); 4783 nap->na_filerev = odsattr.dsa_filerev; 4784 nap->na_size = odsattr.dsa_size; 4785 nap->na_atime = odsattr.dsa_atime; 4786 nap->na_mtime = odsattr.dsa_mtime; 4787 /* 4788 * Fake na_bytes by rounding up na_size. 4789 * Since we don't know the block size, just 4790 * use BLKDEV_IOSIZE. 4791 */ 4792 nap->na_bytes = (odsattr.dsa_size + 4793 BLKDEV_IOSIZE - 1) & ~(BLKDEV_IOSIZE - 1); 4794 } else if (buflen == sizeof(dsattr)) { 4795 NFSBCOPY(buf, &dsattr, buflen); 4796 nap->na_filerev = dsattr.dsa_filerev; 4797 nap->na_size = dsattr.dsa_size; 4798 nap->na_atime = dsattr.dsa_atime; 4799 nap->na_mtime = dsattr.dsa_mtime; 4800 nap->na_bytes = dsattr.dsa_bytes; 4801 } else 4802 error = ENXIO; 4803 } 4804 if (error == 0) { 4805 /* 4806 * If nfsrv_pnfsgetdsattr is 0 or nfsrv_checkdsattr() 4807 * returns 0, just return now. nfsrv_checkdsattr() 4808 * returns 0 if there is no Read/Write layout 4809 * plus either an Open/Write_access or Write 4810 * delegation issued to a client for the file. 4811 */ 4812 if (nfsrv_pnfsgetdsattr == 0 || 4813 nfsrv_checkdsattr(vp, p) == 0) { 4814 free(buf, M_TEMP); 4815 return (error); 4816 } 4817 } 4818 4819 /* 4820 * Clear ENOATTR so the code below will attempt to do a 4821 * nfsrv_getattrdsrpc() to get the attributes and (re)create 4822 * the extended attribute. 4823 */ 4824 if (error == ENOATTR) 4825 error = 0; 4826 } 4827 4828 origmircnt = -1; 4829 trycnt = 0; 4830 tryagain: 4831 if (error == 0) { 4832 buflen = 1024; 4833 if (ioproc == NFSPROC_READDS && NFSVOPISLOCKED(vp) == 4834 LK_EXCLUSIVE) 4835 printf("nfsrv_proxyds: Readds vp exclusively locked\n"); 4836 error = nfsrv_dsgetsockmnt(vp, LK_SHARED, buf, &buflen, 4837 &mirrorcnt, p, dvp, fh, NULL, NULL, NULL, NULL, NULL, 4838 NULL, NULL); 4839 if (error == 0) { 4840 for (i = 0; i < mirrorcnt; i++) 4841 nmp[i] = VFSTONFS(dvp[i]->v_mount); 4842 } else 4843 printf("pNFS: proxy getextattr sockaddr=%d\n", error); 4844 } else 4845 printf("pNFS: nfsrv_dsgetsockmnt=%d\n", error); 4846 if (error == 0) { 4847 failpos = -1; 4848 if (origmircnt == -1) 4849 origmircnt = mirrorcnt; 4850 /* 4851 * If failpos is set to a mirror#, then that mirror has 4852 * failed and will be disabled. For Read, Getattr and Seek, the 4853 * function only tries one mirror, so if that mirror has 4854 * failed, it will need to be retried. As such, increment 4855 * tryitagain for these cases. 4856 * For Write, Setattr and Setacl, the function tries all 4857 * mirrors and will not return an error for the case where 4858 * one mirror has failed. For these cases, the functioning 4859 * mirror(s) will have been modified, so a retry isn't 4860 * necessary. These functions will set failpos for the 4861 * failed mirror#. 4862 */ 4863 if (ioproc == NFSPROC_READDS) { 4864 error = nfsrv_readdsrpc(fh, off, cnt, cred, p, nmp[0], 4865 mpp, mpp2); 4866 if (nfsds_failerr(error) && mirrorcnt > 1) { 4867 /* 4868 * Setting failpos will cause the mirror 4869 * to be disabled and then a retry of this 4870 * read is required. 4871 */ 4872 failpos = 0; 4873 error = 0; 4874 trycnt++; 4875 } 4876 } else if (ioproc == NFSPROC_WRITEDS) 4877 error = nfsrv_writedsrpc(fh, off, cnt, cred, p, vp, 4878 &nmp[0], mirrorcnt, mpp, cp, &failpos); 4879 else if (ioproc == NFSPROC_SETATTR) 4880 error = nfsrv_setattrdsrpc(fh, cred, p, vp, &nmp[0], 4881 mirrorcnt, nap, &failpos); 4882 else if (ioproc == NFSPROC_SETACL) 4883 error = nfsrv_setacldsrpc(fh, cred, p, vp, &nmp[0], 4884 mirrorcnt, aclp, &failpos); 4885 else if (ioproc == NFSPROC_SEEKDS) { 4886 error = nfsrv_seekdsrpc(fh, offp, content, eofp, cred, 4887 p, nmp[0]); 4888 if (nfsds_failerr(error) && mirrorcnt > 1) { 4889 /* 4890 * Setting failpos will cause the mirror 4891 * to be disabled and then a retry of this 4892 * read is required. 4893 */ 4894 failpos = 0; 4895 error = 0; 4896 trycnt++; 4897 } 4898 } else if (ioproc == NFSPROC_ALLOCATE) 4899 error = nfsrv_allocatedsrpc(fh, off, *offp, cred, p, vp, 4900 &nmp[0], mirrorcnt, &failpos); 4901 else if (ioproc == NFSPROC_DEALLOCATE) 4902 error = nfsrv_deallocatedsrpc(fh, off, *offp, cred, p, 4903 vp, &nmp[0], mirrorcnt, &failpos); 4904 else { 4905 error = nfsrv_getattrdsrpc(&fh[mirrorcnt - 1], cred, p, 4906 vp, nmp[mirrorcnt - 1], nap); 4907 if (nfsds_failerr(error) && mirrorcnt > 1) { 4908 /* 4909 * Setting failpos will cause the mirror 4910 * to be disabled and then a retry of this 4911 * getattr is required. 4912 */ 4913 failpos = mirrorcnt - 1; 4914 error = 0; 4915 trycnt++; 4916 } 4917 } 4918 ds = NULL; 4919 if (failpos >= 0) { 4920 failnmp = nmp[failpos]; 4921 NFSLOCKMNT(failnmp); 4922 if ((failnmp->nm_privflag & (NFSMNTP_FORCEDISM | 4923 NFSMNTP_CANCELRPCS)) == 0) { 4924 failnmp->nm_privflag |= NFSMNTP_CANCELRPCS; 4925 NFSUNLOCKMNT(failnmp); 4926 ds = nfsrv_deldsnmp(PNFSDOP_DELDSSERVER, 4927 failnmp, p); 4928 NFSD_DEBUG(4, "dsldsnmp fail=%d ds=%p\n", 4929 failpos, ds); 4930 if (ds != NULL) 4931 nfsrv_killrpcs(failnmp); 4932 NFSLOCKMNT(failnmp); 4933 failnmp->nm_privflag &= ~NFSMNTP_CANCELRPCS; 4934 wakeup(failnmp); 4935 } 4936 NFSUNLOCKMNT(failnmp); 4937 } 4938 for (i = 0; i < mirrorcnt; i++) 4939 NFSVOPUNLOCK(dvp[i]); 4940 NFSD_DEBUG(4, "nfsrv_proxyds: aft RPC=%d trya=%d\n", error, 4941 trycnt); 4942 /* Try the Read/Getattr again if a mirror was deleted. */ 4943 if (ds != NULL && trycnt > 0 && trycnt < origmircnt) 4944 goto tryagain; 4945 } else { 4946 /* Return ENOENT for any Extended Attribute error. */ 4947 error = ENOENT; 4948 } 4949 free(buf, M_TEMP); 4950 NFSD_DEBUG(4, "nfsrv_proxyds: error=%d\n", error); 4951 return (error); 4952 } 4953 4954 /* 4955 * Get the DS mount point, fh and directory from the "pnfsd.dsfile" extended 4956 * attribute. 4957 * newnmpp - If it points to a non-NULL nmp, that is the destination and needs 4958 * to be checked. If it points to a NULL nmp, then it returns 4959 * a suitable destination. 4960 * curnmp - If non-NULL, it is the source mount for the copy. 4961 */ 4962 int 4963 nfsrv_dsgetsockmnt(struct vnode *vp, int lktype, char *buf, int *buflenp, 4964 int *mirrorcntp, NFSPROC_T *p, struct vnode **dvpp, fhandle_t *fhp, 4965 char *devid, char *fnamep, struct vnode **nvpp, struct nfsmount **newnmpp, 4966 struct nfsmount *curnmp, int *ippos, int *dsdirp) 4967 { 4968 struct vnode *dvp, *nvp = NULL, **tdvpp; 4969 struct mount *mp; 4970 struct nfsmount *nmp, *newnmp; 4971 struct sockaddr *sad; 4972 struct sockaddr_in *sin; 4973 struct nfsdevice *ds, *tds, *fndds; 4974 struct pnfsdsfile *pf; 4975 uint32_t dsdir; 4976 int error, fhiszero, fnd, gotone, i, mirrorcnt; 4977 4978 ASSERT_VOP_LOCKED(vp, "nfsrv_dsgetsockmnt vp"); 4979 *mirrorcntp = 1; 4980 tdvpp = dvpp; 4981 if (nvpp != NULL) 4982 *nvpp = NULL; 4983 if (dvpp != NULL) 4984 *dvpp = NULL; 4985 if (ippos != NULL) 4986 *ippos = -1; 4987 if (newnmpp != NULL) 4988 newnmp = *newnmpp; 4989 else 4990 newnmp = NULL; 4991 mp = vp->v_mount; 4992 error = vn_extattr_get(vp, IO_NODELOCKED, EXTATTR_NAMESPACE_SYSTEM, 4993 "pnfsd.dsfile", buflenp, buf, p); 4994 mirrorcnt = *buflenp / sizeof(*pf); 4995 if (error == 0 && (mirrorcnt < 1 || mirrorcnt > NFSDEV_MAXMIRRORS || 4996 *buflenp != sizeof(*pf) * mirrorcnt)) 4997 error = ENOATTR; 4998 4999 pf = (struct pnfsdsfile *)buf; 5000 /* If curnmp != NULL, check for a match in the mirror list. */ 5001 if (curnmp != NULL && error == 0) { 5002 fnd = 0; 5003 for (i = 0; i < mirrorcnt; i++, pf++) { 5004 sad = (struct sockaddr *)&pf->dsf_sin; 5005 if (nfsaddr2_match(sad, curnmp->nm_nam)) { 5006 if (ippos != NULL) 5007 *ippos = i; 5008 fnd = 1; 5009 break; 5010 } 5011 } 5012 if (fnd == 0) 5013 error = ENXIO; 5014 } 5015 5016 gotone = 0; 5017 pf = (struct pnfsdsfile *)buf; 5018 NFSD_DEBUG(4, "nfsrv_dsgetsockmnt: mirrorcnt=%d err=%d\n", mirrorcnt, 5019 error); 5020 for (i = 0; i < mirrorcnt && error == 0; i++, pf++) { 5021 fhiszero = 0; 5022 sad = (struct sockaddr *)&pf->dsf_sin; 5023 sin = &pf->dsf_sin; 5024 dsdir = pf->dsf_dir; 5025 if (dsdir >= nfsrv_dsdirsize) { 5026 printf("nfsrv_dsgetsockmnt: dsdir=%d\n", dsdir); 5027 error = ENOATTR; 5028 } else if (nvpp != NULL && newnmp != NULL && 5029 nfsaddr2_match(sad, newnmp->nm_nam)) 5030 error = EEXIST; 5031 if (error == 0) { 5032 if (ippos != NULL && curnmp == NULL && 5033 sad->sa_family == AF_INET && 5034 sin->sin_addr.s_addr == 0) 5035 *ippos = i; 5036 if (NFSBCMP(&zerofh, &pf->dsf_fh, sizeof(zerofh)) == 0) 5037 fhiszero = 1; 5038 /* Use the socket address to find the mount point. */ 5039 fndds = NULL; 5040 NFSDDSLOCK(); 5041 /* Find a match for the IP address. */ 5042 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 5043 if (ds->nfsdev_nmp != NULL) { 5044 dvp = ds->nfsdev_dvp; 5045 nmp = VFSTONFS(dvp->v_mount); 5046 if (nmp != ds->nfsdev_nmp) 5047 printf("different2 nmp %p %p\n", 5048 nmp, ds->nfsdev_nmp); 5049 if (nfsaddr2_match(sad, nmp->nm_nam)) { 5050 fndds = ds; 5051 break; 5052 } 5053 } 5054 } 5055 if (fndds != NULL && newnmpp != NULL && 5056 newnmp == NULL) { 5057 /* Search for a place to make a mirror copy. */ 5058 TAILQ_FOREACH(tds, &nfsrv_devidhead, 5059 nfsdev_list) { 5060 if (tds->nfsdev_nmp != NULL && 5061 fndds != tds && 5062 ((tds->nfsdev_mdsisset == 0 && 5063 fndds->nfsdev_mdsisset == 0) || 5064 (tds->nfsdev_mdsisset != 0 && 5065 fndds->nfsdev_mdsisset != 0 && 5066 fsidcmp(&tds->nfsdev_mdsfsid, 5067 &mp->mnt_stat.f_fsid) == 0))) { 5068 *newnmpp = tds->nfsdev_nmp; 5069 break; 5070 } 5071 } 5072 if (tds != NULL) { 5073 /* 5074 * Move this entry to the end of the 5075 * list, so it won't be selected as 5076 * easily the next time. 5077 */ 5078 TAILQ_REMOVE(&nfsrv_devidhead, tds, 5079 nfsdev_list); 5080 TAILQ_INSERT_TAIL(&nfsrv_devidhead, tds, 5081 nfsdev_list); 5082 } 5083 } 5084 NFSDDSUNLOCK(); 5085 if (fndds != NULL) { 5086 dvp = fndds->nfsdev_dsdir[dsdir]; 5087 if (lktype != 0 || fhiszero != 0 || 5088 (nvpp != NULL && *nvpp == NULL)) { 5089 if (fhiszero != 0) 5090 error = vn_lock(dvp, 5091 LK_EXCLUSIVE); 5092 else if (lktype != 0) 5093 error = vn_lock(dvp, lktype); 5094 else 5095 error = vn_lock(dvp, LK_SHARED); 5096 /* 5097 * If the file handle is all 0's, try to 5098 * do a Lookup against the DS to acquire 5099 * it. 5100 * If dvpp == NULL or the Lookup fails, 5101 * unlock dvp after the call. 5102 */ 5103 if (error == 0 && (fhiszero != 0 || 5104 (nvpp != NULL && *nvpp == NULL))) { 5105 error = nfsrv_pnfslookupds(vp, 5106 dvp, pf, &nvp, p); 5107 if (error == 0) { 5108 if (fhiszero != 0) 5109 nfsrv_pnfssetfh( 5110 vp, pf, 5111 devid, 5112 fnamep, 5113 nvp, p); 5114 if (nvpp != NULL && 5115 *nvpp == NULL) { 5116 *nvpp = nvp; 5117 *dsdirp = dsdir; 5118 } else 5119 vput(nvp); 5120 } 5121 if (error != 0 || lktype == 0) 5122 NFSVOPUNLOCK(dvp); 5123 } 5124 } 5125 if (error == 0) { 5126 gotone++; 5127 NFSD_DEBUG(4, "gotone=%d\n", gotone); 5128 if (devid != NULL) { 5129 NFSBCOPY(fndds->nfsdev_deviceid, 5130 devid, NFSX_V4DEVICEID); 5131 devid += NFSX_V4DEVICEID; 5132 } 5133 if (dvpp != NULL) 5134 *tdvpp++ = dvp; 5135 if (fhp != NULL) 5136 NFSBCOPY(&pf->dsf_fh, fhp++, 5137 NFSX_MYFH); 5138 if (fnamep != NULL && gotone == 1) 5139 strlcpy(fnamep, 5140 pf->dsf_filename, 5141 sizeof(pf->dsf_filename)); 5142 } else 5143 NFSD_DEBUG(4, "nfsrv_dsgetsockmnt " 5144 "err=%d\n", error); 5145 } 5146 } 5147 } 5148 if (error == 0 && gotone == 0) 5149 error = ENOENT; 5150 5151 NFSD_DEBUG(4, "eo nfsrv_dsgetsockmnt: gotone=%d err=%d\n", gotone, 5152 error); 5153 if (error == 0) 5154 *mirrorcntp = gotone; 5155 else { 5156 if (gotone > 0 && dvpp != NULL) { 5157 /* 5158 * If the error didn't occur on the first one and 5159 * dvpp != NULL, the one(s) prior to the failure will 5160 * have locked dvp's that need to be unlocked. 5161 */ 5162 for (i = 0; i < gotone; i++) { 5163 NFSVOPUNLOCK(*dvpp); 5164 *dvpp++ = NULL; 5165 } 5166 } 5167 /* 5168 * If it found the vnode to be copied from before a failure, 5169 * it needs to be vput()'d. 5170 */ 5171 if (nvpp != NULL && *nvpp != NULL) { 5172 vput(*nvpp); 5173 *nvpp = NULL; 5174 } 5175 } 5176 return (error); 5177 } 5178 5179 /* 5180 * Set the extended attribute for the Change attribute. 5181 */ 5182 static int 5183 nfsrv_setextattr(struct vnode *vp, struct nfsvattr *nap, NFSPROC_T *p) 5184 { 5185 struct pnfsdsattr dsattr; 5186 int error; 5187 5188 ASSERT_VOP_ELOCKED(vp, "nfsrv_setextattr vp"); 5189 dsattr.dsa_filerev = nap->na_filerev; 5190 dsattr.dsa_size = nap->na_size; 5191 dsattr.dsa_atime = nap->na_atime; 5192 dsattr.dsa_mtime = nap->na_mtime; 5193 dsattr.dsa_bytes = nap->na_bytes; 5194 error = vn_extattr_set(vp, IO_NODELOCKED, EXTATTR_NAMESPACE_SYSTEM, 5195 "pnfsd.dsattr", sizeof(dsattr), (char *)&dsattr, p); 5196 if (error != 0) 5197 printf("pNFS: setextattr=%d\n", error); 5198 return (error); 5199 } 5200 5201 static int 5202 nfsrv_readdsrpc(fhandle_t *fhp, off_t off, int len, struct ucred *cred, 5203 NFSPROC_T *p, struct nfsmount *nmp, struct mbuf **mpp, struct mbuf **mpendp) 5204 { 5205 uint32_t *tl; 5206 struct nfsrv_descript *nd; 5207 nfsv4stateid_t st; 5208 struct mbuf *m, *m2; 5209 int error = 0, retlen, tlen, trimlen; 5210 5211 NFSD_DEBUG(4, "in nfsrv_readdsrpc\n"); 5212 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 5213 *mpp = NULL; 5214 /* 5215 * Use a stateid where other is an alternating 01010 pattern and 5216 * seqid is 0xffffffff. This value is not defined as special by 5217 * the RFC and is used by the FreeBSD NFS server to indicate an 5218 * MDS->DS proxy operation. 5219 */ 5220 st.other[0] = 0x55555555; 5221 st.other[1] = 0x55555555; 5222 st.other[2] = 0x55555555; 5223 st.seqid = 0xffffffff; 5224 nfscl_reqstart(nd, NFSPROC_READDS, nmp, (u_int8_t *)fhp, sizeof(*fhp), 5225 NULL, NULL, 0, 0); 5226 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 5227 NFSM_BUILD(tl, uint32_t *, NFSX_UNSIGNED * 3); 5228 txdr_hyper(off, tl); 5229 *(tl + 2) = txdr_unsigned(len); 5230 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred, 5231 NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 5232 if (error != 0) { 5233 free(nd, M_TEMP); 5234 return (error); 5235 } 5236 if (nd->nd_repstat == 0) { 5237 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 5238 NFSM_STRSIZ(retlen, len); 5239 if (retlen > 0) { 5240 /* Trim off the pre-data XDR from the mbuf chain. */ 5241 m = nd->nd_mrep; 5242 while (m != NULL && m != nd->nd_md) { 5243 if (m->m_next == nd->nd_md) { 5244 m->m_next = NULL; 5245 m_freem(nd->nd_mrep); 5246 nd->nd_mrep = m = nd->nd_md; 5247 } else 5248 m = m->m_next; 5249 } 5250 if (m == NULL) { 5251 printf("nfsrv_readdsrpc: busted mbuf list\n"); 5252 error = ENOENT; 5253 goto nfsmout; 5254 } 5255 5256 /* 5257 * Now, adjust first mbuf so that any XDR before the 5258 * read data is skipped over. 5259 */ 5260 trimlen = nd->nd_dpos - mtod(m, char *); 5261 if (trimlen > 0) { 5262 m->m_len -= trimlen; 5263 NFSM_DATAP(m, trimlen); 5264 } 5265 5266 /* 5267 * Truncate the mbuf chain at retlen bytes of data, 5268 * plus XDR padding that brings the length up to a 5269 * multiple of 4. 5270 */ 5271 tlen = NFSM_RNDUP(retlen); 5272 do { 5273 if (m->m_len >= tlen) { 5274 m->m_len = tlen; 5275 tlen = 0; 5276 m2 = m->m_next; 5277 m->m_next = NULL; 5278 m_freem(m2); 5279 break; 5280 } 5281 tlen -= m->m_len; 5282 m = m->m_next; 5283 } while (m != NULL); 5284 if (tlen > 0) { 5285 printf("nfsrv_readdsrpc: busted mbuf list\n"); 5286 error = ENOENT; 5287 goto nfsmout; 5288 } 5289 *mpp = nd->nd_mrep; 5290 *mpendp = m; 5291 nd->nd_mrep = NULL; 5292 } 5293 } else 5294 error = nd->nd_repstat; 5295 nfsmout: 5296 /* If nd->nd_mrep is already NULL, this is a no-op. */ 5297 m_freem(nd->nd_mrep); 5298 free(nd, M_TEMP); 5299 NFSD_DEBUG(4, "nfsrv_readdsrpc error=%d\n", error); 5300 return (error); 5301 } 5302 5303 /* 5304 * Do a write RPC on a DS data file, using this structure for the arguments, 5305 * so that this function can be executed by a separate kernel process. 5306 */ 5307 struct nfsrvwritedsdorpc { 5308 int done; 5309 int inprog; 5310 struct task tsk; 5311 fhandle_t fh; 5312 off_t off; 5313 int len; 5314 struct nfsmount *nmp; 5315 struct ucred *cred; 5316 NFSPROC_T *p; 5317 struct mbuf *m; 5318 int err; 5319 }; 5320 5321 static int 5322 nfsrv_writedsdorpc(struct nfsmount *nmp, fhandle_t *fhp, off_t off, int len, 5323 struct nfsvattr *nap, struct mbuf *m, struct ucred *cred, NFSPROC_T *p) 5324 { 5325 uint32_t *tl; 5326 struct nfsrv_descript *nd; 5327 nfsattrbit_t attrbits; 5328 nfsv4stateid_t st; 5329 int commit, error, retlen; 5330 5331 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 5332 nfscl_reqstart(nd, NFSPROC_WRITE, nmp, (u_int8_t *)fhp, 5333 sizeof(fhandle_t), NULL, NULL, 0, 0); 5334 5335 /* 5336 * Use a stateid where other is an alternating 01010 pattern and 5337 * seqid is 0xffffffff. This value is not defined as special by 5338 * the RFC and is used by the FreeBSD NFS server to indicate an 5339 * MDS->DS proxy operation. 5340 */ 5341 st.other[0] = 0x55555555; 5342 st.other[1] = 0x55555555; 5343 st.other[2] = 0x55555555; 5344 st.seqid = 0xffffffff; 5345 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 5346 NFSM_BUILD(tl, u_int32_t *, NFSX_HYPER + 2 * NFSX_UNSIGNED); 5347 txdr_hyper(off, tl); 5348 tl += 2; 5349 /* 5350 * Do all writes FileSync, since the server doesn't hold onto dirty 5351 * buffers. Since clients should be accessing the DS servers directly 5352 * using the pNFS layouts, this just needs to work correctly as a 5353 * fallback. 5354 */ 5355 *tl++ = txdr_unsigned(NFSWRITE_FILESYNC); 5356 *tl = txdr_unsigned(len); 5357 NFSD_DEBUG(4, "nfsrv_writedsdorpc: len=%d\n", len); 5358 5359 /* Put data in mbuf chain. */ 5360 nd->nd_mb->m_next = m; 5361 5362 /* Set nd_mb and nd_bpos to end of data. */ 5363 while (m->m_next != NULL) 5364 m = m->m_next; 5365 nd->nd_mb = m; 5366 nfsm_set(nd, m->m_len); 5367 NFSD_DEBUG(4, "nfsrv_writedsdorpc: lastmb len=%d\n", m->m_len); 5368 5369 /* Do a Getattr for the attributes that change upon writing. */ 5370 NFSZERO_ATTRBIT(&attrbits); 5371 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SIZE); 5372 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_CHANGE); 5373 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEACCESS); 5374 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEMODIFY); 5375 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SPACEUSED); 5376 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 5377 *tl = txdr_unsigned(NFSV4OP_GETATTR); 5378 (void) nfsrv_putattrbit(nd, &attrbits); 5379 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, 5380 cred, NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 5381 if (error != 0) { 5382 free(nd, M_TEMP); 5383 return (error); 5384 } 5385 NFSD_DEBUG(4, "nfsrv_writedsdorpc: aft writerpc=%d\n", nd->nd_repstat); 5386 /* Get rid of weak cache consistency data for now. */ 5387 if ((nd->nd_flag & (ND_NOMOREDATA | ND_NFSV4 | ND_V4WCCATTR)) == 5388 (ND_NFSV4 | ND_V4WCCATTR)) { 5389 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, NULL, NULL, 5390 NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 5391 NFSD_DEBUG(4, "nfsrv_writedsdorpc: wcc attr=%d\n", error); 5392 if (error != 0) 5393 goto nfsmout; 5394 /* 5395 * Get rid of Op# and status for next op. 5396 */ 5397 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 5398 if (*++tl != 0) 5399 nd->nd_flag |= ND_NOMOREDATA; 5400 } 5401 if (nd->nd_repstat == 0) { 5402 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED + NFSX_VERF); 5403 retlen = fxdr_unsigned(int, *tl++); 5404 commit = fxdr_unsigned(int, *tl); 5405 if (commit != NFSWRITE_FILESYNC) 5406 error = NFSERR_IO; 5407 NFSD_DEBUG(4, "nfsrv_writedsdorpc:retlen=%d commit=%d err=%d\n", 5408 retlen, commit, error); 5409 } else 5410 error = nd->nd_repstat; 5411 /* We have no use for the Write Verifier since we use FileSync. */ 5412 5413 /* 5414 * Get the Change, Size, Access Time and Modify Time attributes and set 5415 * on the Metadata file, so its attributes will be what the file's 5416 * would be if it had been written. 5417 */ 5418 if (error == 0) { 5419 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 5420 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, NULL, NULL, 5421 NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 5422 } 5423 NFSD_DEBUG(4, "nfsrv_writedsdorpc: aft loadattr=%d\n", error); 5424 nfsmout: 5425 m_freem(nd->nd_mrep); 5426 free(nd, M_TEMP); 5427 NFSD_DEBUG(4, "nfsrv_writedsdorpc error=%d\n", error); 5428 return (error); 5429 } 5430 5431 /* 5432 * Start up the thread that will execute nfsrv_writedsdorpc(). 5433 */ 5434 static void 5435 start_writedsdorpc(void *arg, int pending) 5436 { 5437 struct nfsrvwritedsdorpc *drpc; 5438 5439 drpc = (struct nfsrvwritedsdorpc *)arg; 5440 drpc->err = nfsrv_writedsdorpc(drpc->nmp, &drpc->fh, drpc->off, 5441 drpc->len, NULL, drpc->m, drpc->cred, drpc->p); 5442 drpc->done = 1; 5443 NFSD_DEBUG(4, "start_writedsdorpc: err=%d\n", drpc->err); 5444 } 5445 5446 static int 5447 nfsrv_writedsrpc(fhandle_t *fhp, off_t off, int len, struct ucred *cred, 5448 NFSPROC_T *p, struct vnode *vp, struct nfsmount **nmpp, int mirrorcnt, 5449 struct mbuf **mpp, char *cp, int *failposp) 5450 { 5451 struct nfsrvwritedsdorpc *drpc, *tdrpc = NULL; 5452 struct nfsvattr na; 5453 struct mbuf *m; 5454 int error, i, offs, ret, timo; 5455 5456 NFSD_DEBUG(4, "in nfsrv_writedsrpc\n"); 5457 KASSERT(*mpp != NULL, ("nfsrv_writedsrpc: NULL mbuf chain")); 5458 drpc = NULL; 5459 if (mirrorcnt > 1) 5460 tdrpc = drpc = malloc(sizeof(*drpc) * (mirrorcnt - 1), M_TEMP, 5461 M_WAITOK); 5462 5463 /* Calculate offset in mbuf chain that data starts. */ 5464 offs = cp - mtod(*mpp, char *); 5465 NFSD_DEBUG(4, "nfsrv_writedsrpc: mcopy offs=%d len=%d\n", offs, len); 5466 5467 /* 5468 * Do the write RPC for every DS, using a separate kernel process 5469 * for every DS except the last one. 5470 */ 5471 error = 0; 5472 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5473 tdrpc->done = 0; 5474 NFSBCOPY(fhp, &tdrpc->fh, sizeof(*fhp)); 5475 tdrpc->off = off; 5476 tdrpc->len = len; 5477 tdrpc->nmp = *nmpp; 5478 tdrpc->cred = cred; 5479 tdrpc->p = p; 5480 tdrpc->inprog = 0; 5481 tdrpc->err = 0; 5482 tdrpc->m = m_copym(*mpp, offs, NFSM_RNDUP(len), M_WAITOK); 5483 ret = EIO; 5484 if (nfs_pnfsiothreads != 0) { 5485 ret = nfs_pnfsio(start_writedsdorpc, tdrpc); 5486 NFSD_DEBUG(4, "nfsrv_writedsrpc: nfs_pnfsio=%d\n", 5487 ret); 5488 } 5489 if (ret != 0) { 5490 ret = nfsrv_writedsdorpc(*nmpp, fhp, off, len, NULL, 5491 tdrpc->m, cred, p); 5492 if (nfsds_failerr(ret) && *failposp == -1) 5493 *failposp = i; 5494 else if (error == 0 && ret != 0) 5495 error = ret; 5496 } 5497 nmpp++; 5498 fhp++; 5499 } 5500 m = m_copym(*mpp, offs, NFSM_RNDUP(len), M_WAITOK); 5501 ret = nfsrv_writedsdorpc(*nmpp, fhp, off, len, &na, m, cred, p); 5502 if (nfsds_failerr(ret) && *failposp == -1 && mirrorcnt > 1) 5503 *failposp = mirrorcnt - 1; 5504 else if (error == 0 && ret != 0) 5505 error = ret; 5506 if (error == 0) 5507 error = nfsrv_setextattr(vp, &na, p); 5508 NFSD_DEBUG(4, "nfsrv_writedsrpc: aft setextat=%d\n", error); 5509 tdrpc = drpc; 5510 timo = hz / 50; /* Wait for 20msec. */ 5511 if (timo < 1) 5512 timo = 1; 5513 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5514 /* Wait for RPCs on separate threads to complete. */ 5515 while (tdrpc->inprog != 0 && tdrpc->done == 0) 5516 tsleep(&tdrpc->tsk, PVFS, "srvwrds", timo); 5517 if (nfsds_failerr(tdrpc->err) && *failposp == -1) 5518 *failposp = i; 5519 else if (error == 0 && tdrpc->err != 0) 5520 error = tdrpc->err; 5521 } 5522 free(drpc, M_TEMP); 5523 return (error); 5524 } 5525 5526 /* 5527 * Do a allocate RPC on a DS data file, using this structure for the arguments, 5528 * so that this function can be executed by a separate kernel process. 5529 */ 5530 struct nfsrvallocatedsdorpc { 5531 int done; 5532 int inprog; 5533 struct task tsk; 5534 fhandle_t fh; 5535 off_t off; 5536 off_t len; 5537 struct nfsmount *nmp; 5538 struct ucred *cred; 5539 NFSPROC_T *p; 5540 int err; 5541 }; 5542 5543 static int 5544 nfsrv_allocatedsdorpc(struct nfsmount *nmp, fhandle_t *fhp, off_t off, 5545 off_t len, struct nfsvattr *nap, struct ucred *cred, NFSPROC_T *p) 5546 { 5547 uint32_t *tl; 5548 struct nfsrv_descript *nd; 5549 nfsattrbit_t attrbits; 5550 nfsv4stateid_t st; 5551 int error; 5552 5553 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 5554 nfscl_reqstart(nd, NFSPROC_ALLOCATE, nmp, (u_int8_t *)fhp, 5555 sizeof(fhandle_t), NULL, NULL, 0, 0); 5556 5557 /* 5558 * Use a stateid where other is an alternating 01010 pattern and 5559 * seqid is 0xffffffff. This value is not defined as special by 5560 * the RFC and is used by the FreeBSD NFS server to indicate an 5561 * MDS->DS proxy operation. 5562 */ 5563 st.other[0] = 0x55555555; 5564 st.other[1] = 0x55555555; 5565 st.other[2] = 0x55555555; 5566 st.seqid = 0xffffffff; 5567 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 5568 NFSM_BUILD(tl, uint32_t *, 2 * NFSX_HYPER + NFSX_UNSIGNED); 5569 txdr_hyper(off, tl); tl += 2; 5570 txdr_hyper(len, tl); tl += 2; 5571 NFSD_DEBUG(4, "nfsrv_allocatedsdorpc: len=%jd\n", (intmax_t)len); 5572 5573 *tl = txdr_unsigned(NFSV4OP_GETATTR); 5574 NFSGETATTR_ATTRBIT(&attrbits); 5575 nfsrv_putattrbit(nd, &attrbits); 5576 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, 5577 cred, NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 5578 if (error != 0) { 5579 free(nd, M_TEMP); 5580 return (error); 5581 } 5582 NFSD_DEBUG(4, "nfsrv_allocatedsdorpc: aft allocaterpc=%d\n", 5583 nd->nd_repstat); 5584 if (nd->nd_repstat == 0) { 5585 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 5586 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, NULL, NULL, 5587 NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 5588 } else 5589 error = nd->nd_repstat; 5590 NFSD_DEBUG(4, "nfsrv_allocatedsdorpc: aft loadattr=%d\n", error); 5591 nfsmout: 5592 m_freem(nd->nd_mrep); 5593 free(nd, M_TEMP); 5594 NFSD_DEBUG(4, "nfsrv_allocatedsdorpc error=%d\n", error); 5595 return (error); 5596 } 5597 5598 /* 5599 * Start up the thread that will execute nfsrv_allocatedsdorpc(). 5600 */ 5601 static void 5602 start_allocatedsdorpc(void *arg, int pending) 5603 { 5604 struct nfsrvallocatedsdorpc *drpc; 5605 5606 drpc = (struct nfsrvallocatedsdorpc *)arg; 5607 drpc->err = nfsrv_allocatedsdorpc(drpc->nmp, &drpc->fh, drpc->off, 5608 drpc->len, NULL, drpc->cred, drpc->p); 5609 drpc->done = 1; 5610 NFSD_DEBUG(4, "start_allocatedsdorpc: err=%d\n", drpc->err); 5611 } 5612 5613 static int 5614 nfsrv_allocatedsrpc(fhandle_t *fhp, off_t off, off_t len, struct ucred *cred, 5615 NFSPROC_T *p, struct vnode *vp, struct nfsmount **nmpp, int mirrorcnt, 5616 int *failposp) 5617 { 5618 struct nfsrvallocatedsdorpc *drpc, *tdrpc = NULL; 5619 struct nfsvattr na; 5620 int error, i, ret, timo; 5621 5622 NFSD_DEBUG(4, "in nfsrv_allocatedsrpc\n"); 5623 drpc = NULL; 5624 if (mirrorcnt > 1) 5625 tdrpc = drpc = malloc(sizeof(*drpc) * (mirrorcnt - 1), M_TEMP, 5626 M_WAITOK); 5627 5628 /* 5629 * Do the allocate RPC for every DS, using a separate kernel process 5630 * for every DS except the last one. 5631 */ 5632 error = 0; 5633 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5634 tdrpc->done = 0; 5635 NFSBCOPY(fhp, &tdrpc->fh, sizeof(*fhp)); 5636 tdrpc->off = off; 5637 tdrpc->len = len; 5638 tdrpc->nmp = *nmpp; 5639 tdrpc->cred = cred; 5640 tdrpc->p = p; 5641 tdrpc->inprog = 0; 5642 tdrpc->err = 0; 5643 ret = EIO; 5644 if (nfs_pnfsiothreads != 0) { 5645 ret = nfs_pnfsio(start_allocatedsdorpc, tdrpc); 5646 NFSD_DEBUG(4, "nfsrv_allocatedsrpc: nfs_pnfsio=%d\n", 5647 ret); 5648 } 5649 if (ret != 0) { 5650 ret = nfsrv_allocatedsdorpc(*nmpp, fhp, off, len, NULL, 5651 cred, p); 5652 if (nfsds_failerr(ret) && *failposp == -1) 5653 *failposp = i; 5654 else if (error == 0 && ret != 0) 5655 error = ret; 5656 } 5657 nmpp++; 5658 fhp++; 5659 } 5660 ret = nfsrv_allocatedsdorpc(*nmpp, fhp, off, len, &na, cred, p); 5661 if (nfsds_failerr(ret) && *failposp == -1 && mirrorcnt > 1) 5662 *failposp = mirrorcnt - 1; 5663 else if (error == 0 && ret != 0) 5664 error = ret; 5665 if (error == 0) 5666 error = nfsrv_setextattr(vp, &na, p); 5667 NFSD_DEBUG(4, "nfsrv_allocatedsrpc: aft setextat=%d\n", error); 5668 tdrpc = drpc; 5669 timo = hz / 50; /* Wait for 20msec. */ 5670 if (timo < 1) 5671 timo = 1; 5672 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5673 /* Wait for RPCs on separate threads to complete. */ 5674 while (tdrpc->inprog != 0 && tdrpc->done == 0) 5675 tsleep(&tdrpc->tsk, PVFS, "srvalds", timo); 5676 if (nfsds_failerr(tdrpc->err) && *failposp == -1) 5677 *failposp = i; 5678 else if (error == 0 && tdrpc->err != 0) 5679 error = tdrpc->err; 5680 } 5681 free(drpc, M_TEMP); 5682 return (error); 5683 } 5684 5685 /* 5686 * Do a deallocate RPC on a DS data file, using this structure for the 5687 * arguments, so that this function can be executed by a separate kernel 5688 * process. 5689 */ 5690 struct nfsrvdeallocatedsdorpc { 5691 int done; 5692 int inprog; 5693 struct task tsk; 5694 fhandle_t fh; 5695 off_t off; 5696 off_t len; 5697 struct nfsmount *nmp; 5698 struct ucred *cred; 5699 NFSPROC_T *p; 5700 int err; 5701 }; 5702 5703 static int 5704 nfsrv_deallocatedsdorpc(struct nfsmount *nmp, fhandle_t *fhp, off_t off, 5705 off_t len, struct nfsvattr *nap, struct ucred *cred, NFSPROC_T *p) 5706 { 5707 uint32_t *tl; 5708 struct nfsrv_descript *nd; 5709 nfsattrbit_t attrbits; 5710 nfsv4stateid_t st; 5711 int error; 5712 5713 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 5714 nfscl_reqstart(nd, NFSPROC_DEALLOCATE, nmp, (u_int8_t *)fhp, 5715 sizeof(fhandle_t), NULL, NULL, 0, 0); 5716 5717 /* 5718 * Use a stateid where other is an alternating 01010 pattern and 5719 * seqid is 0xffffffff. This value is not defined as special by 5720 * the RFC and is used by the FreeBSD NFS server to indicate an 5721 * MDS->DS proxy operation. 5722 */ 5723 st.other[0] = 0x55555555; 5724 st.other[1] = 0x55555555; 5725 st.other[2] = 0x55555555; 5726 st.seqid = 0xffffffff; 5727 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 5728 NFSM_BUILD(tl, uint32_t *, 2 * NFSX_HYPER + NFSX_UNSIGNED); 5729 txdr_hyper(off, tl); tl += 2; 5730 txdr_hyper(len, tl); tl += 2; 5731 NFSD_DEBUG(4, "nfsrv_deallocatedsdorpc: len=%jd\n", (intmax_t)len); 5732 5733 /* Do a Getattr for the attributes that change upon writing. */ 5734 NFSZERO_ATTRBIT(&attrbits); 5735 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SIZE); 5736 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_CHANGE); 5737 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEACCESS); 5738 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEMODIFY); 5739 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SPACEUSED); 5740 *tl = txdr_unsigned(NFSV4OP_GETATTR); 5741 nfsrv_putattrbit(nd, &attrbits); 5742 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, 5743 cred, NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 5744 if (error != 0) { 5745 free(nd, M_TEMP); 5746 return (error); 5747 } 5748 NFSD_DEBUG(4, "nfsrv_deallocatedsdorpc: aft deallocaterpc=%d\n", 5749 nd->nd_repstat); 5750 /* Get rid of weak cache consistency data for now. */ 5751 if ((nd->nd_flag & (ND_NOMOREDATA | ND_NFSV4 | ND_V4WCCATTR)) == 5752 (ND_NFSV4 | ND_V4WCCATTR)) { 5753 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, NULL, NULL, 5754 NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 5755 NFSD_DEBUG(4, "nfsrv_deallocatedsdorpc: wcc attr=%d\n", error); 5756 if (error != 0) 5757 goto nfsmout; 5758 /* 5759 * Get rid of Op# and status for next op. 5760 */ 5761 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 5762 if (*++tl != 0) 5763 nd->nd_flag |= ND_NOMOREDATA; 5764 } 5765 if (nd->nd_repstat == 0) { 5766 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 5767 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, NULL, NULL, 5768 NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 5769 } else 5770 error = nd->nd_repstat; 5771 NFSD_DEBUG(4, "nfsrv_deallocatedsdorpc: aft loadattr=%d\n", error); 5772 nfsmout: 5773 m_freem(nd->nd_mrep); 5774 free(nd, M_TEMP); 5775 NFSD_DEBUG(4, "nfsrv_deallocatedsdorpc error=%d\n", error); 5776 return (error); 5777 } 5778 5779 /* 5780 * Start up the thread that will execute nfsrv_deallocatedsdorpc(). 5781 */ 5782 static void 5783 start_deallocatedsdorpc(void *arg, int pending) 5784 { 5785 struct nfsrvdeallocatedsdorpc *drpc; 5786 5787 drpc = (struct nfsrvdeallocatedsdorpc *)arg; 5788 drpc->err = nfsrv_deallocatedsdorpc(drpc->nmp, &drpc->fh, drpc->off, 5789 drpc->len, NULL, drpc->cred, drpc->p); 5790 drpc->done = 1; 5791 NFSD_DEBUG(4, "start_deallocatedsdorpc: err=%d\n", drpc->err); 5792 } 5793 5794 static int 5795 nfsrv_deallocatedsrpc(fhandle_t *fhp, off_t off, off_t len, struct ucred *cred, 5796 NFSPROC_T *p, struct vnode *vp, struct nfsmount **nmpp, int mirrorcnt, 5797 int *failposp) 5798 { 5799 struct nfsrvdeallocatedsdorpc *drpc, *tdrpc = NULL; 5800 struct nfsvattr na; 5801 int error, i, ret, timo; 5802 5803 NFSD_DEBUG(4, "in nfsrv_deallocatedsrpc\n"); 5804 drpc = NULL; 5805 if (mirrorcnt > 1) 5806 tdrpc = drpc = malloc(sizeof(*drpc) * (mirrorcnt - 1), M_TEMP, 5807 M_WAITOK); 5808 5809 /* 5810 * Do the deallocate RPC for every DS, using a separate kernel process 5811 * for every DS except the last one. 5812 */ 5813 error = 0; 5814 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5815 tdrpc->done = 0; 5816 NFSBCOPY(fhp, &tdrpc->fh, sizeof(*fhp)); 5817 tdrpc->off = off; 5818 tdrpc->len = len; 5819 tdrpc->nmp = *nmpp; 5820 tdrpc->cred = cred; 5821 tdrpc->p = p; 5822 tdrpc->inprog = 0; 5823 tdrpc->err = 0; 5824 ret = EIO; 5825 if (nfs_pnfsiothreads != 0) { 5826 ret = nfs_pnfsio(start_deallocatedsdorpc, tdrpc); 5827 NFSD_DEBUG(4, "nfsrv_deallocatedsrpc: nfs_pnfsio=%d\n", 5828 ret); 5829 } 5830 if (ret != 0) { 5831 ret = nfsrv_deallocatedsdorpc(*nmpp, fhp, off, len, 5832 NULL, cred, p); 5833 if (nfsds_failerr(ret) && *failposp == -1) 5834 *failposp = i; 5835 else if (error == 0 && ret != 0) 5836 error = ret; 5837 } 5838 nmpp++; 5839 fhp++; 5840 } 5841 ret = nfsrv_deallocatedsdorpc(*nmpp, fhp, off, len, &na, cred, p); 5842 if (nfsds_failerr(ret) && *failposp == -1 && mirrorcnt > 1) 5843 *failposp = mirrorcnt - 1; 5844 else if (error == 0 && ret != 0) 5845 error = ret; 5846 if (error == 0) 5847 error = nfsrv_setextattr(vp, &na, p); 5848 NFSD_DEBUG(4, "nfsrv_deallocatedsrpc: aft setextat=%d\n", error); 5849 tdrpc = drpc; 5850 timo = hz / 50; /* Wait for 20msec. */ 5851 if (timo < 1) 5852 timo = 1; 5853 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5854 /* Wait for RPCs on separate threads to complete. */ 5855 while (tdrpc->inprog != 0 && tdrpc->done == 0) 5856 tsleep(&tdrpc->tsk, PVFS, "srvalds", timo); 5857 if (nfsds_failerr(tdrpc->err) && *failposp == -1) 5858 *failposp = i; 5859 else if (error == 0 && tdrpc->err != 0) 5860 error = tdrpc->err; 5861 } 5862 free(drpc, M_TEMP); 5863 return (error); 5864 } 5865 5866 static int 5867 nfsrv_setattrdsdorpc(fhandle_t *fhp, struct ucred *cred, NFSPROC_T *p, 5868 struct vnode *vp, struct nfsmount *nmp, struct nfsvattr *nap, 5869 struct nfsvattr *dsnap) 5870 { 5871 uint32_t *tl; 5872 struct nfsrv_descript *nd; 5873 nfsv4stateid_t st; 5874 nfsattrbit_t attrbits; 5875 int error; 5876 5877 NFSD_DEBUG(4, "in nfsrv_setattrdsdorpc\n"); 5878 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 5879 /* 5880 * Use a stateid where other is an alternating 01010 pattern and 5881 * seqid is 0xffffffff. This value is not defined as special by 5882 * the RFC and is used by the FreeBSD NFS server to indicate an 5883 * MDS->DS proxy operation. 5884 */ 5885 st.other[0] = 0x55555555; 5886 st.other[1] = 0x55555555; 5887 st.other[2] = 0x55555555; 5888 st.seqid = 0xffffffff; 5889 nfscl_reqstart(nd, NFSPROC_SETATTR, nmp, (u_int8_t *)fhp, sizeof(*fhp), 5890 NULL, NULL, 0, 0); 5891 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 5892 nfscl_fillsattr(nd, &nap->na_vattr, vp, NFSSATTR_FULL, 0); 5893 5894 /* Do a Getattr for the attributes that change due to writing. */ 5895 NFSZERO_ATTRBIT(&attrbits); 5896 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SIZE); 5897 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_CHANGE); 5898 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEACCESS); 5899 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEMODIFY); 5900 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SPACEUSED); 5901 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 5902 *tl = txdr_unsigned(NFSV4OP_GETATTR); 5903 (void) nfsrv_putattrbit(nd, &attrbits); 5904 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred, 5905 NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 5906 if (error != 0) { 5907 free(nd, M_TEMP); 5908 return (error); 5909 } 5910 NFSD_DEBUG(4, "nfsrv_setattrdsdorpc: aft setattrrpc=%d\n", 5911 nd->nd_repstat); 5912 /* Get rid of weak cache consistency data for now. */ 5913 if ((nd->nd_flag & (ND_NOMOREDATA | ND_NFSV4 | ND_V4WCCATTR)) == 5914 (ND_NFSV4 | ND_V4WCCATTR)) { 5915 error = nfsv4_loadattr(nd, NULL, dsnap, NULL, NULL, 0, NULL, 5916 NULL, NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 5917 NFSD_DEBUG(4, "nfsrv_setattrdsdorpc: wcc attr=%d\n", error); 5918 if (error != 0) 5919 goto nfsmout; 5920 /* 5921 * Get rid of Op# and status for next op. 5922 */ 5923 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 5924 if (*++tl != 0) 5925 nd->nd_flag |= ND_NOMOREDATA; 5926 } 5927 error = nfsrv_getattrbits(nd, &attrbits, NULL, NULL); 5928 if (error != 0) 5929 goto nfsmout; 5930 if (nd->nd_repstat != 0) 5931 error = nd->nd_repstat; 5932 /* 5933 * Get the Change, Size, Access Time and Modify Time attributes and set 5934 * on the Metadata file, so its attributes will be what the file's 5935 * would be if it had been written. 5936 */ 5937 if (error == 0) { 5938 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 5939 error = nfsv4_loadattr(nd, NULL, dsnap, NULL, NULL, 0, NULL, 5940 NULL, NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 5941 } 5942 NFSD_DEBUG(4, "nfsrv_setattrdsdorpc: aft setattr loadattr=%d\n", error); 5943 nfsmout: 5944 m_freem(nd->nd_mrep); 5945 free(nd, M_TEMP); 5946 NFSD_DEBUG(4, "nfsrv_setattrdsdorpc error=%d\n", error); 5947 return (error); 5948 } 5949 5950 struct nfsrvsetattrdsdorpc { 5951 int done; 5952 int inprog; 5953 struct task tsk; 5954 fhandle_t fh; 5955 struct nfsmount *nmp; 5956 struct vnode *vp; 5957 struct ucred *cred; 5958 NFSPROC_T *p; 5959 struct nfsvattr na; 5960 struct nfsvattr dsna; 5961 int err; 5962 }; 5963 5964 /* 5965 * Start up the thread that will execute nfsrv_setattrdsdorpc(). 5966 */ 5967 static void 5968 start_setattrdsdorpc(void *arg, int pending) 5969 { 5970 struct nfsrvsetattrdsdorpc *drpc; 5971 5972 drpc = (struct nfsrvsetattrdsdorpc *)arg; 5973 drpc->err = nfsrv_setattrdsdorpc(&drpc->fh, drpc->cred, drpc->p, 5974 drpc->vp, drpc->nmp, &drpc->na, &drpc->dsna); 5975 drpc->done = 1; 5976 } 5977 5978 static int 5979 nfsrv_setattrdsrpc(fhandle_t *fhp, struct ucred *cred, NFSPROC_T *p, 5980 struct vnode *vp, struct nfsmount **nmpp, int mirrorcnt, 5981 struct nfsvattr *nap, int *failposp) 5982 { 5983 struct nfsrvsetattrdsdorpc *drpc, *tdrpc = NULL; 5984 struct nfsvattr na; 5985 int error, i, ret, timo; 5986 5987 NFSD_DEBUG(4, "in nfsrv_setattrdsrpc\n"); 5988 drpc = NULL; 5989 if (mirrorcnt > 1) 5990 tdrpc = drpc = malloc(sizeof(*drpc) * (mirrorcnt - 1), M_TEMP, 5991 M_WAITOK); 5992 5993 /* 5994 * Do the setattr RPC for every DS, using a separate kernel process 5995 * for every DS except the last one. 5996 */ 5997 error = 0; 5998 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5999 tdrpc->done = 0; 6000 tdrpc->inprog = 0; 6001 NFSBCOPY(fhp, &tdrpc->fh, sizeof(*fhp)); 6002 tdrpc->nmp = *nmpp; 6003 tdrpc->vp = vp; 6004 tdrpc->cred = cred; 6005 tdrpc->p = p; 6006 tdrpc->na = *nap; 6007 tdrpc->err = 0; 6008 ret = EIO; 6009 if (nfs_pnfsiothreads != 0) { 6010 ret = nfs_pnfsio(start_setattrdsdorpc, tdrpc); 6011 NFSD_DEBUG(4, "nfsrv_setattrdsrpc: nfs_pnfsio=%d\n", 6012 ret); 6013 } 6014 if (ret != 0) { 6015 ret = nfsrv_setattrdsdorpc(fhp, cred, p, vp, *nmpp, nap, 6016 &na); 6017 if (nfsds_failerr(ret) && *failposp == -1) 6018 *failposp = i; 6019 else if (error == 0 && ret != 0) 6020 error = ret; 6021 } 6022 nmpp++; 6023 fhp++; 6024 } 6025 ret = nfsrv_setattrdsdorpc(fhp, cred, p, vp, *nmpp, nap, &na); 6026 if (nfsds_failerr(ret) && *failposp == -1 && mirrorcnt > 1) 6027 *failposp = mirrorcnt - 1; 6028 else if (error == 0 && ret != 0) 6029 error = ret; 6030 if (error == 0) 6031 error = nfsrv_setextattr(vp, &na, p); 6032 NFSD_DEBUG(4, "nfsrv_setattrdsrpc: aft setextat=%d\n", error); 6033 tdrpc = drpc; 6034 timo = hz / 50; /* Wait for 20msec. */ 6035 if (timo < 1) 6036 timo = 1; 6037 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 6038 /* Wait for RPCs on separate threads to complete. */ 6039 while (tdrpc->inprog != 0 && tdrpc->done == 0) 6040 tsleep(&tdrpc->tsk, PVFS, "srvsads", timo); 6041 if (nfsds_failerr(tdrpc->err) && *failposp == -1) 6042 *failposp = i; 6043 else if (error == 0 && tdrpc->err != 0) 6044 error = tdrpc->err; 6045 } 6046 free(drpc, M_TEMP); 6047 return (error); 6048 } 6049 6050 /* 6051 * Do a Setattr of an NFSv4 ACL on the DS file. 6052 */ 6053 static int 6054 nfsrv_setacldsdorpc(fhandle_t *fhp, struct ucred *cred, NFSPROC_T *p, 6055 struct vnode *vp, struct nfsmount *nmp, struct acl *aclp) 6056 { 6057 struct nfsrv_descript *nd; 6058 nfsv4stateid_t st; 6059 nfsattrbit_t attrbits; 6060 int error; 6061 6062 NFSD_DEBUG(4, "in nfsrv_setacldsdorpc\n"); 6063 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 6064 /* 6065 * Use a stateid where other is an alternating 01010 pattern and 6066 * seqid is 0xffffffff. This value is not defined as special by 6067 * the RFC and is used by the FreeBSD NFS server to indicate an 6068 * MDS->DS proxy operation. 6069 */ 6070 st.other[0] = 0x55555555; 6071 st.other[1] = 0x55555555; 6072 st.other[2] = 0x55555555; 6073 st.seqid = 0xffffffff; 6074 nfscl_reqstart(nd, NFSPROC_SETACL, nmp, (u_int8_t *)fhp, sizeof(*fhp), 6075 NULL, NULL, 0, 0); 6076 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 6077 NFSZERO_ATTRBIT(&attrbits); 6078 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_ACL); 6079 /* 6080 * The "vp" argument to nfsv4_fillattr() is only used for vnode_type(), 6081 * so passing in the metadata "vp" will be ok, since it is of 6082 * the same type (VREG). 6083 */ 6084 nfsv4_fillattr(nd, NULL, vp, aclp, NULL, NULL, 0, &attrbits, NULL, 6085 NULL, 0, 0, 0, 0, 0, NULL); 6086 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred, 6087 NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 6088 if (error != 0) { 6089 free(nd, M_TEMP); 6090 return (error); 6091 } 6092 NFSD_DEBUG(4, "nfsrv_setacldsdorpc: aft setaclrpc=%d\n", 6093 nd->nd_repstat); 6094 error = nd->nd_repstat; 6095 m_freem(nd->nd_mrep); 6096 free(nd, M_TEMP); 6097 return (error); 6098 } 6099 6100 struct nfsrvsetacldsdorpc { 6101 int done; 6102 int inprog; 6103 struct task tsk; 6104 fhandle_t fh; 6105 struct nfsmount *nmp; 6106 struct vnode *vp; 6107 struct ucred *cred; 6108 NFSPROC_T *p; 6109 struct acl *aclp; 6110 int err; 6111 }; 6112 6113 /* 6114 * Start up the thread that will execute nfsrv_setacldsdorpc(). 6115 */ 6116 static void 6117 start_setacldsdorpc(void *arg, int pending) 6118 { 6119 struct nfsrvsetacldsdorpc *drpc; 6120 6121 drpc = (struct nfsrvsetacldsdorpc *)arg; 6122 drpc->err = nfsrv_setacldsdorpc(&drpc->fh, drpc->cred, drpc->p, 6123 drpc->vp, drpc->nmp, drpc->aclp); 6124 drpc->done = 1; 6125 } 6126 6127 static int 6128 nfsrv_setacldsrpc(fhandle_t *fhp, struct ucred *cred, NFSPROC_T *p, 6129 struct vnode *vp, struct nfsmount **nmpp, int mirrorcnt, struct acl *aclp, 6130 int *failposp) 6131 { 6132 struct nfsrvsetacldsdorpc *drpc, *tdrpc = NULL; 6133 int error, i, ret, timo; 6134 6135 NFSD_DEBUG(4, "in nfsrv_setacldsrpc\n"); 6136 drpc = NULL; 6137 if (mirrorcnt > 1) 6138 tdrpc = drpc = malloc(sizeof(*drpc) * (mirrorcnt - 1), M_TEMP, 6139 M_WAITOK); 6140 6141 /* 6142 * Do the setattr RPC for every DS, using a separate kernel process 6143 * for every DS except the last one. 6144 */ 6145 error = 0; 6146 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 6147 tdrpc->done = 0; 6148 tdrpc->inprog = 0; 6149 NFSBCOPY(fhp, &tdrpc->fh, sizeof(*fhp)); 6150 tdrpc->nmp = *nmpp; 6151 tdrpc->vp = vp; 6152 tdrpc->cred = cred; 6153 tdrpc->p = p; 6154 tdrpc->aclp = aclp; 6155 tdrpc->err = 0; 6156 ret = EIO; 6157 if (nfs_pnfsiothreads != 0) { 6158 ret = nfs_pnfsio(start_setacldsdorpc, tdrpc); 6159 NFSD_DEBUG(4, "nfsrv_setacldsrpc: nfs_pnfsio=%d\n", 6160 ret); 6161 } 6162 if (ret != 0) { 6163 ret = nfsrv_setacldsdorpc(fhp, cred, p, vp, *nmpp, 6164 aclp); 6165 if (nfsds_failerr(ret) && *failposp == -1) 6166 *failposp = i; 6167 else if (error == 0 && ret != 0) 6168 error = ret; 6169 } 6170 nmpp++; 6171 fhp++; 6172 } 6173 ret = nfsrv_setacldsdorpc(fhp, cred, p, vp, *nmpp, aclp); 6174 if (nfsds_failerr(ret) && *failposp == -1 && mirrorcnt > 1) 6175 *failposp = mirrorcnt - 1; 6176 else if (error == 0 && ret != 0) 6177 error = ret; 6178 NFSD_DEBUG(4, "nfsrv_setacldsrpc: aft setextat=%d\n", error); 6179 tdrpc = drpc; 6180 timo = hz / 50; /* Wait for 20msec. */ 6181 if (timo < 1) 6182 timo = 1; 6183 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 6184 /* Wait for RPCs on separate threads to complete. */ 6185 while (tdrpc->inprog != 0 && tdrpc->done == 0) 6186 tsleep(&tdrpc->tsk, PVFS, "srvacds", timo); 6187 if (nfsds_failerr(tdrpc->err) && *failposp == -1) 6188 *failposp = i; 6189 else if (error == 0 && tdrpc->err != 0) 6190 error = tdrpc->err; 6191 } 6192 free(drpc, M_TEMP); 6193 return (error); 6194 } 6195 6196 /* 6197 * Getattr call to the DS for the attributes that change due to writing. 6198 */ 6199 static int 6200 nfsrv_getattrdsrpc(fhandle_t *fhp, struct ucred *cred, NFSPROC_T *p, 6201 struct vnode *vp, struct nfsmount *nmp, struct nfsvattr *nap) 6202 { 6203 struct nfsrv_descript *nd; 6204 int error; 6205 nfsattrbit_t attrbits; 6206 6207 NFSD_DEBUG(4, "in nfsrv_getattrdsrpc\n"); 6208 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 6209 nfscl_reqstart(nd, NFSPROC_GETATTR, nmp, (u_int8_t *)fhp, 6210 sizeof(fhandle_t), NULL, NULL, 0, 0); 6211 NFSZERO_ATTRBIT(&attrbits); 6212 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SIZE); 6213 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_CHANGE); 6214 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEACCESS); 6215 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEMODIFY); 6216 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SPACEUSED); 6217 (void) nfsrv_putattrbit(nd, &attrbits); 6218 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred, 6219 NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 6220 if (error != 0) { 6221 free(nd, M_TEMP); 6222 return (error); 6223 } 6224 NFSD_DEBUG(4, "nfsrv_getattrdsrpc: aft getattrrpc=%d\n", 6225 nd->nd_repstat); 6226 if (nd->nd_repstat == 0) { 6227 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, 6228 NULL, NULL, NULL, NULL, NULL, 0, NULL, NULL, NULL, 6229 NULL, NULL); 6230 /* 6231 * We can only save the updated values in the extended 6232 * attribute if the vp is exclusively locked. 6233 * This should happen when any of the following operations 6234 * occur on the vnode: 6235 * Close, Delegreturn, LayoutCommit, LayoutReturn 6236 * As such, the updated extended attribute should get saved 6237 * before nfsrv_checkdsattr() returns 0 and allows the cached 6238 * attributes to be returned without calling this function. 6239 */ 6240 if (error == 0 && VOP_ISLOCKED(vp) == LK_EXCLUSIVE) { 6241 error = nfsrv_setextattr(vp, nap, p); 6242 NFSD_DEBUG(4, "nfsrv_getattrdsrpc: aft setextat=%d\n", 6243 error); 6244 } 6245 } else 6246 error = nd->nd_repstat; 6247 m_freem(nd->nd_mrep); 6248 free(nd, M_TEMP); 6249 NFSD_DEBUG(4, "nfsrv_getattrdsrpc error=%d\n", error); 6250 return (error); 6251 } 6252 6253 /* 6254 * Seek call to a DS. 6255 */ 6256 static int 6257 nfsrv_seekdsrpc(fhandle_t *fhp, off_t *offp, int content, bool *eofp, 6258 struct ucred *cred, NFSPROC_T *p, struct nfsmount *nmp) 6259 { 6260 uint32_t *tl; 6261 struct nfsrv_descript *nd; 6262 nfsv4stateid_t st; 6263 int error; 6264 6265 NFSD_DEBUG(4, "in nfsrv_seekdsrpc\n"); 6266 /* 6267 * Use a stateid where other is an alternating 01010 pattern and 6268 * seqid is 0xffffffff. This value is not defined as special by 6269 * the RFC and is used by the FreeBSD NFS server to indicate an 6270 * MDS->DS proxy operation. 6271 */ 6272 st.other[0] = 0x55555555; 6273 st.other[1] = 0x55555555; 6274 st.other[2] = 0x55555555; 6275 st.seqid = 0xffffffff; 6276 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 6277 nfscl_reqstart(nd, NFSPROC_SEEKDS, nmp, (u_int8_t *)fhp, 6278 sizeof(fhandle_t), NULL, NULL, 0, 0); 6279 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 6280 NFSM_BUILD(tl, uint32_t *, NFSX_HYPER + NFSX_UNSIGNED); 6281 txdr_hyper(*offp, tl); tl += 2; 6282 *tl = txdr_unsigned(content); 6283 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred, 6284 NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 6285 if (error != 0) { 6286 free(nd, M_TEMP); 6287 return (error); 6288 } 6289 NFSD_DEBUG(4, "nfsrv_seekdsrpc: aft seekrpc=%d\n", nd->nd_repstat); 6290 if (nd->nd_repstat == 0) { 6291 NFSM_DISSECT(tl, uint32_t *, NFSX_UNSIGNED + NFSX_HYPER); 6292 if (*tl++ == newnfs_true) 6293 *eofp = true; 6294 else 6295 *eofp = false; 6296 *offp = fxdr_hyper(tl); 6297 } else 6298 error = nd->nd_repstat; 6299 nfsmout: 6300 m_freem(nd->nd_mrep); 6301 free(nd, M_TEMP); 6302 NFSD_DEBUG(4, "nfsrv_seekdsrpc error=%d\n", error); 6303 return (error); 6304 } 6305 6306 /* 6307 * Get the device id and file handle for a DS file. 6308 */ 6309 int 6310 nfsrv_dsgetdevandfh(struct vnode *vp, NFSPROC_T *p, int *mirrorcntp, 6311 fhandle_t *fhp, char *devid) 6312 { 6313 int buflen, error; 6314 char *buf; 6315 6316 buflen = 1024; 6317 buf = malloc(buflen, M_TEMP, M_WAITOK); 6318 error = nfsrv_dsgetsockmnt(vp, 0, buf, &buflen, mirrorcntp, p, NULL, 6319 fhp, devid, NULL, NULL, NULL, NULL, NULL, NULL); 6320 free(buf, M_TEMP); 6321 return (error); 6322 } 6323 6324 /* 6325 * Do a Lookup against the DS for the filename. 6326 */ 6327 static int 6328 nfsrv_pnfslookupds(struct vnode *vp, struct vnode *dvp, struct pnfsdsfile *pf, 6329 struct vnode **nvpp, NFSPROC_T *p) 6330 { 6331 struct nameidata named; 6332 struct ucred *tcred; 6333 char *bufp; 6334 u_long *hashp; 6335 struct vnode *nvp; 6336 int error; 6337 6338 tcred = newnfs_getcred(); 6339 named.ni_cnd.cn_nameiop = LOOKUP; 6340 named.ni_cnd.cn_lkflags = LK_SHARED | LK_RETRY; 6341 named.ni_cnd.cn_cred = tcred; 6342 named.ni_cnd.cn_flags = ISLASTCN | LOCKPARENT | LOCKLEAF | SAVENAME; 6343 nfsvno_setpathbuf(&named, &bufp, &hashp); 6344 named.ni_cnd.cn_nameptr = bufp; 6345 named.ni_cnd.cn_namelen = strlen(pf->dsf_filename); 6346 strlcpy(bufp, pf->dsf_filename, NAME_MAX); 6347 NFSD_DEBUG(4, "nfsrv_pnfslookupds: filename=%s\n", bufp); 6348 error = VOP_LOOKUP(dvp, &nvp, &named.ni_cnd); 6349 NFSD_DEBUG(4, "nfsrv_pnfslookupds: aft LOOKUP=%d\n", error); 6350 NFSFREECRED(tcred); 6351 nfsvno_relpathbuf(&named); 6352 if (error == 0) 6353 *nvpp = nvp; 6354 NFSD_DEBUG(4, "eo nfsrv_pnfslookupds=%d\n", error); 6355 return (error); 6356 } 6357 6358 /* 6359 * Set the file handle to the correct one. 6360 */ 6361 static void 6362 nfsrv_pnfssetfh(struct vnode *vp, struct pnfsdsfile *pf, char *devid, 6363 char *fnamep, struct vnode *nvp, NFSPROC_T *p) 6364 { 6365 struct nfsnode *np; 6366 int ret = 0; 6367 6368 np = VTONFS(nvp); 6369 NFSBCOPY(np->n_fhp->nfh_fh, &pf->dsf_fh, NFSX_MYFH); 6370 /* 6371 * We can only do a vn_set_extattr() if the vnode is exclusively 6372 * locked and vn_start_write() has been done. If devid != NULL or 6373 * fnamep != NULL or the vnode is shared locked, vn_start_write() 6374 * may not have been done. 6375 * If not done now, it will be done on a future call. 6376 */ 6377 if (devid == NULL && fnamep == NULL && NFSVOPISLOCKED(vp) == 6378 LK_EXCLUSIVE) 6379 ret = vn_extattr_set(vp, IO_NODELOCKED, 6380 EXTATTR_NAMESPACE_SYSTEM, "pnfsd.dsfile", sizeof(*pf), 6381 (char *)pf, p); 6382 NFSD_DEBUG(4, "eo nfsrv_pnfssetfh=%d\n", ret); 6383 } 6384 6385 /* 6386 * Cause RPCs waiting on "nmp" to fail. This is called for a DS mount point 6387 * when the DS has failed. 6388 */ 6389 void 6390 nfsrv_killrpcs(struct nfsmount *nmp) 6391 { 6392 6393 /* 6394 * Call newnfs_nmcancelreqs() to cause 6395 * any RPCs in progress on the mount point to 6396 * fail. 6397 * This will cause any process waiting for an 6398 * RPC to complete while holding a vnode lock 6399 * on the mounted-on vnode (such as "df" or 6400 * a non-forced "umount") to fail. 6401 * This will unlock the mounted-on vnode so 6402 * a forced dismount can succeed. 6403 * The NFSMNTP_CANCELRPCS flag should be set when this function is 6404 * called. 6405 */ 6406 newnfs_nmcancelreqs(nmp); 6407 } 6408 6409 /* 6410 * Sum up the statfs info for each of the DSs, so that the client will 6411 * receive the total for all DSs. 6412 */ 6413 static int 6414 nfsrv_pnfsstatfs(struct statfs *sf, struct mount *mp) 6415 { 6416 struct statfs *tsf; 6417 struct nfsdevice *ds; 6418 struct vnode **dvpp, **tdvpp, *dvp; 6419 uint64_t tot; 6420 int cnt, error = 0, i; 6421 6422 if (nfsrv_devidcnt <= 0) 6423 return (ENXIO); 6424 dvpp = mallocarray(nfsrv_devidcnt, sizeof(*dvpp), M_TEMP, M_WAITOK); 6425 tsf = malloc(sizeof(*tsf), M_TEMP, M_WAITOK); 6426 6427 /* Get an array of the dvps for the DSs. */ 6428 tdvpp = dvpp; 6429 i = 0; 6430 NFSDDSLOCK(); 6431 /* First, search for matches for same file system. */ 6432 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 6433 if (ds->nfsdev_nmp != NULL && ds->nfsdev_mdsisset != 0 && 6434 fsidcmp(&ds->nfsdev_mdsfsid, &mp->mnt_stat.f_fsid) == 0) { 6435 if (++i > nfsrv_devidcnt) 6436 break; 6437 *tdvpp++ = ds->nfsdev_dvp; 6438 } 6439 } 6440 /* 6441 * If no matches for same file system, total all servers not assigned 6442 * to a file system. 6443 */ 6444 if (i == 0) { 6445 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 6446 if (ds->nfsdev_nmp != NULL && 6447 ds->nfsdev_mdsisset == 0) { 6448 if (++i > nfsrv_devidcnt) 6449 break; 6450 *tdvpp++ = ds->nfsdev_dvp; 6451 } 6452 } 6453 } 6454 NFSDDSUNLOCK(); 6455 cnt = i; 6456 6457 /* Do a VFS_STATFS() for each of the DSs and sum them up. */ 6458 tdvpp = dvpp; 6459 for (i = 0; i < cnt && error == 0; i++) { 6460 dvp = *tdvpp++; 6461 error = VFS_STATFS(dvp->v_mount, tsf); 6462 if (error == 0) { 6463 if (sf->f_bsize == 0) { 6464 if (tsf->f_bsize > 0) 6465 sf->f_bsize = tsf->f_bsize; 6466 else 6467 sf->f_bsize = 8192; 6468 } 6469 if (tsf->f_blocks > 0) { 6470 if (sf->f_bsize != tsf->f_bsize) { 6471 tot = tsf->f_blocks * tsf->f_bsize; 6472 sf->f_blocks += (tot / sf->f_bsize); 6473 } else 6474 sf->f_blocks += tsf->f_blocks; 6475 } 6476 if (tsf->f_bfree > 0) { 6477 if (sf->f_bsize != tsf->f_bsize) { 6478 tot = tsf->f_bfree * tsf->f_bsize; 6479 sf->f_bfree += (tot / sf->f_bsize); 6480 } else 6481 sf->f_bfree += tsf->f_bfree; 6482 } 6483 if (tsf->f_bavail > 0) { 6484 if (sf->f_bsize != tsf->f_bsize) { 6485 tot = tsf->f_bavail * tsf->f_bsize; 6486 sf->f_bavail += (tot / sf->f_bsize); 6487 } else 6488 sf->f_bavail += tsf->f_bavail; 6489 } 6490 } 6491 } 6492 free(tsf, M_TEMP); 6493 free(dvpp, M_TEMP); 6494 return (error); 6495 } 6496 6497 /* 6498 * Set an NFSv4 acl. 6499 */ 6500 int 6501 nfsrv_setacl(struct vnode *vp, NFSACL_T *aclp, struct ucred *cred, NFSPROC_T *p) 6502 { 6503 int error; 6504 6505 if (nfsrv_useacl == 0 || nfs_supportsnfsv4acls(vp) == 0) { 6506 error = NFSERR_ATTRNOTSUPP; 6507 goto out; 6508 } 6509 /* 6510 * With NFSv4 ACLs, chmod(2) may need to add additional entries. 6511 * Make sure it has enough room for that - splitting every entry 6512 * into two and appending "canonical six" entries at the end. 6513 * Cribbed out of kern/vfs_acl.c - Rick M. 6514 */ 6515 if (aclp->acl_cnt > (ACL_MAX_ENTRIES - 6) / 2) { 6516 error = NFSERR_ATTRNOTSUPP; 6517 goto out; 6518 } 6519 error = VOP_SETACL(vp, ACL_TYPE_NFS4, aclp, cred, p); 6520 if (error == 0) { 6521 error = nfsrv_dssetacl(vp, aclp, cred, p); 6522 if (error == ENOENT) 6523 error = 0; 6524 } 6525 6526 out: 6527 NFSEXITCODE(error); 6528 return (error); 6529 } 6530 6531 /* 6532 * Seek vnode op call (actually it is a VOP_IOCTL()). 6533 * This function is called with the vnode locked, but unlocks and vrele()s 6534 * the vp before returning. 6535 */ 6536 int 6537 nfsvno_seek(struct nfsrv_descript *nd, struct vnode *vp, u_long cmd, 6538 off_t *offp, int content, bool *eofp, struct ucred *cred, NFSPROC_T *p) 6539 { 6540 struct nfsvattr at; 6541 int error, ret; 6542 6543 ASSERT_VOP_LOCKED(vp, "nfsvno_seek vp"); 6544 /* 6545 * Attempt to seek on a DS file. A return of ENOENT implies 6546 * there is no DS file to seek on. 6547 */ 6548 error = nfsrv_proxyds(vp, 0, 0, cred, p, NFSPROC_SEEKDS, NULL, 6549 NULL, NULL, NULL, NULL, offp, content, eofp); 6550 if (error != ENOENT) { 6551 vput(vp); 6552 return (error); 6553 } 6554 6555 /* 6556 * Do the VOP_IOCTL() call. For the case where *offp == file_size, 6557 * VOP_IOCTL() will return ENXIO. However, the correct reply for 6558 * NFSv4.2 is *eofp == true and error == 0 for this case. 6559 */ 6560 NFSVOPUNLOCK(vp); 6561 error = VOP_IOCTL(vp, cmd, offp, 0, cred, p); 6562 *eofp = false; 6563 if (error == ENXIO || (error == 0 && cmd == FIOSEEKHOLE)) { 6564 /* Handle the cases where we might be at EOF. */ 6565 ret = nfsvno_getattr(vp, &at, nd, p, 0, NULL); 6566 if (ret == 0 && *offp == at.na_size) { 6567 *eofp = true; 6568 error = 0; 6569 } 6570 if (ret != 0 && error == 0) 6571 error = ret; 6572 } 6573 vrele(vp); 6574 NFSEXITCODE(error); 6575 return (error); 6576 } 6577 6578 /* 6579 * Allocate vnode op call. 6580 */ 6581 int 6582 nfsvno_allocate(struct vnode *vp, off_t off, off_t len, struct ucred *cred, 6583 NFSPROC_T *p) 6584 { 6585 int error; 6586 off_t olen; 6587 6588 ASSERT_VOP_ELOCKED(vp, "nfsvno_allocate vp"); 6589 /* 6590 * Attempt to allocate on a DS file. A return of ENOENT implies 6591 * there is no DS file to allocate on. 6592 */ 6593 error = nfsrv_proxyds(vp, off, 0, cred, p, NFSPROC_ALLOCATE, NULL, 6594 NULL, NULL, NULL, NULL, &len, 0, NULL); 6595 if (error != ENOENT) 6596 return (error); 6597 6598 /* 6599 * Do the actual VOP_ALLOCATE(), looping so long as 6600 * progress is being made, to achieve completion. 6601 */ 6602 do { 6603 olen = len; 6604 error = VOP_ALLOCATE(vp, &off, &len, IO_SYNC, cred); 6605 if (error == 0 && len > 0 && olen > len) 6606 maybe_yield(); 6607 } while (error == 0 && len > 0 && olen > len); 6608 if (error == 0 && len > 0) 6609 error = NFSERR_IO; 6610 NFSEXITCODE(error); 6611 return (error); 6612 } 6613 6614 /* 6615 * Deallocate vnode op call. 6616 */ 6617 int 6618 nfsvno_deallocate(struct vnode *vp, off_t off, off_t len, struct ucred *cred, 6619 NFSPROC_T *p) 6620 { 6621 int error; 6622 off_t olen; 6623 6624 ASSERT_VOP_ELOCKED(vp, "nfsvno_deallocate vp"); 6625 /* 6626 * Attempt to deallocate on a DS file. A return of ENOENT implies 6627 * there is no DS file to deallocate on. 6628 */ 6629 error = nfsrv_proxyds(vp, off, 0, cred, p, NFSPROC_DEALLOCATE, NULL, 6630 NULL, NULL, NULL, NULL, &len, 0, NULL); 6631 if (error != ENOENT) 6632 return (error); 6633 6634 /* 6635 * Do the actual VOP_DEALLOCATE(), looping so long as 6636 * progress is being made, to achieve completion. 6637 */ 6638 do { 6639 olen = len; 6640 error = VOP_DEALLOCATE(vp, &off, &len, 0, IO_SYNC, cred); 6641 if (error == 0 && len > 0 && olen > len) 6642 maybe_yield(); 6643 } while (error == 0 && len > 0 && olen > len); 6644 if (error == 0 && len > 0) 6645 error = NFSERR_IO; 6646 NFSEXITCODE(error); 6647 return (error); 6648 } 6649 6650 /* 6651 * Get Extended Atribute vnode op into an mbuf list. 6652 */ 6653 int 6654 nfsvno_getxattr(struct vnode *vp, char *name, uint32_t maxresp, 6655 struct ucred *cred, uint64_t flag, int maxextsiz, struct thread *p, 6656 struct mbuf **mpp, struct mbuf **mpendp, int *lenp) 6657 { 6658 struct iovec *iv; 6659 struct uio io, *uiop = &io; 6660 struct mbuf *m, *m2; 6661 int alen, error, len, tlen; 6662 size_t siz; 6663 6664 /* First, find out the size of the extended attribute. */ 6665 error = VOP_GETEXTATTR(vp, EXTATTR_NAMESPACE_USER, name, NULL, 6666 &siz, cred, p); 6667 if (error != 0) 6668 return (NFSERR_NOXATTR); 6669 if (siz > maxresp - NFS_MAXXDR) 6670 return (NFSERR_XATTR2BIG); 6671 len = siz; 6672 tlen = NFSM_RNDUP(len); 6673 if (tlen > 0) { 6674 /* 6675 * If cnt > MCLBYTES and the reply will not be saved, use 6676 * ext_pgs mbufs for TLS. 6677 * For NFSv4.0, we do not know for sure if the reply will 6678 * be saved, so do not use ext_pgs mbufs for NFSv4.0. 6679 * Always use ext_pgs mbufs if ND_EXTPG is set. 6680 */ 6681 if ((flag & ND_EXTPG) != 0 || (tlen > MCLBYTES && 6682 (flag & (ND_TLS | ND_SAVEREPLY)) == ND_TLS && 6683 (flag & (ND_NFSV4 | ND_NFSV41)) != ND_NFSV4)) 6684 uiop->uio_iovcnt = nfsrv_createiovec_extpgs(tlen, 6685 maxextsiz, &m, &m2, &iv); 6686 else 6687 uiop->uio_iovcnt = nfsrv_createiovec(tlen, &m, &m2, 6688 &iv); 6689 uiop->uio_iov = iv; 6690 } else { 6691 uiop->uio_iovcnt = 0; 6692 uiop->uio_iov = iv = NULL; 6693 m = m2 = NULL; 6694 } 6695 uiop->uio_offset = 0; 6696 uiop->uio_resid = tlen; 6697 uiop->uio_rw = UIO_READ; 6698 uiop->uio_segflg = UIO_SYSSPACE; 6699 uiop->uio_td = p; 6700 #ifdef MAC 6701 error = mac_vnode_check_getextattr(cred, vp, EXTATTR_NAMESPACE_USER, 6702 name); 6703 if (error != 0) 6704 goto out; 6705 #endif 6706 6707 if (tlen > 0) 6708 error = VOP_GETEXTATTR(vp, EXTATTR_NAMESPACE_USER, name, uiop, 6709 NULL, cred, p); 6710 if (error != 0) 6711 goto out; 6712 if (uiop->uio_resid > 0) { 6713 alen = tlen; 6714 len = tlen - uiop->uio_resid; 6715 tlen = NFSM_RNDUP(len); 6716 if (alen != tlen) 6717 printf("nfsvno_getxattr: weird size read\n"); 6718 if (tlen == 0) { 6719 m_freem(m); 6720 m = m2 = NULL; 6721 } else if (alen != tlen || tlen != len) 6722 m2 = nfsrv_adj(m, alen - tlen, tlen - len); 6723 } 6724 *lenp = len; 6725 *mpp = m; 6726 *mpendp = m2; 6727 6728 out: 6729 if (error != 0) { 6730 if (m != NULL) 6731 m_freem(m); 6732 *lenp = 0; 6733 } 6734 free(iv, M_TEMP); 6735 NFSEXITCODE(error); 6736 return (error); 6737 } 6738 6739 /* 6740 * Set Extended attribute vnode op from an mbuf list. 6741 */ 6742 int 6743 nfsvno_setxattr(struct vnode *vp, char *name, int len, struct mbuf *m, 6744 char *cp, struct ucred *cred, struct thread *p) 6745 { 6746 struct iovec *iv; 6747 struct uio uio, *uiop = &uio; 6748 int cnt, error; 6749 6750 error = 0; 6751 #ifdef MAC 6752 error = mac_vnode_check_setextattr(cred, vp, EXTATTR_NAMESPACE_USER, 6753 name); 6754 #endif 6755 if (error != 0) 6756 goto out; 6757 6758 uiop->uio_rw = UIO_WRITE; 6759 uiop->uio_segflg = UIO_SYSSPACE; 6760 uiop->uio_td = p; 6761 uiop->uio_offset = 0; 6762 uiop->uio_resid = len; 6763 if (len > 0) { 6764 error = nfsrv_createiovecw(len, m, cp, &iv, &cnt); 6765 uiop->uio_iov = iv; 6766 uiop->uio_iovcnt = cnt; 6767 } else { 6768 uiop->uio_iov = iv = NULL; 6769 uiop->uio_iovcnt = 0; 6770 } 6771 if (error == 0) { 6772 error = VOP_SETEXTATTR(vp, EXTATTR_NAMESPACE_USER, name, uiop, 6773 cred, p); 6774 free(iv, M_TEMP); 6775 } 6776 6777 out: 6778 NFSEXITCODE(error); 6779 return (error); 6780 } 6781 6782 /* 6783 * Remove Extended attribute vnode op. 6784 */ 6785 int 6786 nfsvno_rmxattr(struct nfsrv_descript *nd, struct vnode *vp, char *name, 6787 struct ucred *cred, struct thread *p) 6788 { 6789 int error; 6790 6791 /* 6792 * Get rid of any delegations. I am not sure why this is required, 6793 * but RFC-8276 says so. 6794 */ 6795 error = nfsrv_checkremove(vp, 0, nd, nd->nd_clientid, p); 6796 if (error != 0) 6797 goto out; 6798 #ifdef MAC 6799 error = mac_vnode_check_deleteextattr(cred, vp, EXTATTR_NAMESPACE_USER, 6800 name); 6801 if (error != 0) 6802 goto out; 6803 #endif 6804 6805 error = VOP_DELETEEXTATTR(vp, EXTATTR_NAMESPACE_USER, name, cred, p); 6806 if (error == EOPNOTSUPP) 6807 error = VOP_SETEXTATTR(vp, EXTATTR_NAMESPACE_USER, name, NULL, 6808 cred, p); 6809 out: 6810 NFSEXITCODE(error); 6811 return (error); 6812 } 6813 6814 /* 6815 * List Extended Atribute vnode op into an mbuf list. 6816 */ 6817 int 6818 nfsvno_listxattr(struct vnode *vp, uint64_t cookie, struct ucred *cred, 6819 struct thread *p, u_char **bufp, uint32_t *lenp, bool *eofp) 6820 { 6821 struct iovec iv; 6822 struct uio io; 6823 int error; 6824 size_t siz; 6825 6826 *bufp = NULL; 6827 /* First, find out the size of the extended attribute. */ 6828 error = VOP_LISTEXTATTR(vp, EXTATTR_NAMESPACE_USER, NULL, &siz, cred, 6829 p); 6830 if (error != 0) 6831 return (NFSERR_NOXATTR); 6832 if (siz <= cookie) { 6833 *lenp = 0; 6834 *eofp = true; 6835 goto out; 6836 } 6837 if (siz > cookie + *lenp) { 6838 siz = cookie + *lenp; 6839 *eofp = false; 6840 } else 6841 *eofp = true; 6842 /* Just choose a sanity limit of 10Mbytes for malloc(M_TEMP). */ 6843 if (siz > 10 * 1024 * 1024) { 6844 error = NFSERR_XATTR2BIG; 6845 goto out; 6846 } 6847 *bufp = malloc(siz, M_TEMP, M_WAITOK); 6848 iv.iov_base = *bufp; 6849 iv.iov_len = siz; 6850 io.uio_iovcnt = 1; 6851 io.uio_iov = &iv; 6852 io.uio_offset = 0; 6853 io.uio_resid = siz; 6854 io.uio_rw = UIO_READ; 6855 io.uio_segflg = UIO_SYSSPACE; 6856 io.uio_td = p; 6857 #ifdef MAC 6858 error = mac_vnode_check_listextattr(cred, vp, EXTATTR_NAMESPACE_USER); 6859 if (error != 0) 6860 goto out; 6861 #endif 6862 6863 error = VOP_LISTEXTATTR(vp, EXTATTR_NAMESPACE_USER, &io, NULL, cred, 6864 p); 6865 if (error != 0) 6866 goto out; 6867 if (io.uio_resid > 0) 6868 siz -= io.uio_resid; 6869 *lenp = siz; 6870 6871 out: 6872 if (error != 0) { 6873 free(*bufp, M_TEMP); 6874 *bufp = NULL; 6875 } 6876 NFSEXITCODE(error); 6877 return (error); 6878 } 6879 6880 /* 6881 * Trim trailing data off the mbuf list being built. 6882 */ 6883 void 6884 nfsm_trimtrailing(struct nfsrv_descript *nd, struct mbuf *mb, char *bpos, 6885 int bextpg, int bextpgsiz) 6886 { 6887 vm_page_t pg; 6888 int fullpgsiz, i; 6889 6890 if (mb->m_next != NULL) { 6891 m_freem(mb->m_next); 6892 mb->m_next = NULL; 6893 } 6894 if ((mb->m_flags & M_EXTPG) != 0) { 6895 KASSERT(bextpg >= 0 && bextpg < mb->m_epg_npgs, 6896 ("nfsm_trimtrailing: bextpg out of range")); 6897 KASSERT(bpos == (char *)(void *) 6898 PHYS_TO_DMAP(mb->m_epg_pa[bextpg]) + PAGE_SIZE - bextpgsiz, 6899 ("nfsm_trimtrailing: bextpgsiz bad!")); 6900 6901 /* First, get rid of any pages after this position. */ 6902 for (i = mb->m_epg_npgs - 1; i > bextpg; i--) { 6903 pg = PHYS_TO_VM_PAGE(mb->m_epg_pa[i]); 6904 vm_page_unwire_noq(pg); 6905 vm_page_free(pg); 6906 } 6907 mb->m_epg_npgs = bextpg + 1; 6908 if (bextpg == 0) 6909 fullpgsiz = PAGE_SIZE - mb->m_epg_1st_off; 6910 else 6911 fullpgsiz = PAGE_SIZE; 6912 mb->m_epg_last_len = fullpgsiz - bextpgsiz; 6913 mb->m_len = m_epg_pagelen(mb, 0, mb->m_epg_1st_off); 6914 for (i = 1; i < mb->m_epg_npgs; i++) 6915 mb->m_len += m_epg_pagelen(mb, i, 0); 6916 nd->nd_bextpgsiz = bextpgsiz; 6917 nd->nd_bextpg = bextpg; 6918 } else 6919 mb->m_len = bpos - mtod(mb, char *); 6920 nd->nd_mb = mb; 6921 nd->nd_bpos = bpos; 6922 } 6923 6924 6925 /* 6926 * Check to see if a put file handle operation should test for 6927 * NFSERR_WRONGSEC, although NFSv3 actually returns NFSERR_AUTHERR. 6928 * When Open is the next operation, NFSERR_WRONGSEC cannot be 6929 * replied for the Open cases that use a component. Thia can 6930 * be identified by the fact that the file handle's type is VDIR. 6931 */ 6932 bool 6933 nfsrv_checkwrongsec(struct nfsrv_descript *nd, int nextop, enum vtype vtyp) 6934 { 6935 6936 if ((nd->nd_flag & ND_NFSV4) == 0) { 6937 if (nd->nd_procnum == NFSPROC_FSINFO) 6938 return (false); 6939 return (true); 6940 } 6941 6942 if ((nd->nd_flag & ND_LASTOP) != 0) 6943 return (false); 6944 6945 if (nextop == NFSV4OP_PUTROOTFH || nextop == NFSV4OP_PUTFH || 6946 nextop == NFSV4OP_PUTPUBFH || nextop == NFSV4OP_RESTOREFH || 6947 nextop == NFSV4OP_LOOKUP || nextop == NFSV4OP_LOOKUPP || 6948 nextop == NFSV4OP_SECINFO || nextop == NFSV4OP_SECINFONONAME) 6949 return (false); 6950 if (nextop == NFSV4OP_OPEN && vtyp == VDIR) 6951 return (false); 6952 return (true); 6953 } 6954 6955 /* 6956 * Check DSs marked no space. 6957 */ 6958 void 6959 nfsrv_checknospc(void) 6960 { 6961 struct statfs *tsf; 6962 struct nfsdevice *ds; 6963 struct vnode **dvpp, **tdvpp, *dvp; 6964 char *devid, *tdevid; 6965 int cnt, error = 0, i; 6966 6967 if (nfsrv_devidcnt <= 0) 6968 return; 6969 dvpp = mallocarray(nfsrv_devidcnt, sizeof(*dvpp), M_TEMP, M_WAITOK); 6970 devid = malloc(nfsrv_devidcnt * NFSX_V4DEVICEID, M_TEMP, M_WAITOK); 6971 tsf = malloc(sizeof(*tsf), M_TEMP, M_WAITOK); 6972 6973 /* Get an array of the dvps for the DSs. */ 6974 tdvpp = dvpp; 6975 tdevid = devid; 6976 i = 0; 6977 NFSDDSLOCK(); 6978 /* First, search for matches for same file system. */ 6979 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 6980 if (ds->nfsdev_nmp != NULL && ds->nfsdev_nospc) { 6981 if (++i > nfsrv_devidcnt) 6982 break; 6983 *tdvpp++ = ds->nfsdev_dvp; 6984 NFSBCOPY(ds->nfsdev_deviceid, tdevid, NFSX_V4DEVICEID); 6985 tdevid += NFSX_V4DEVICEID; 6986 } 6987 } 6988 NFSDDSUNLOCK(); 6989 6990 /* Do a VFS_STATFS() for each of the DSs and clear no space. */ 6991 cnt = i; 6992 tdvpp = dvpp; 6993 tdevid = devid; 6994 for (i = 0; i < cnt && error == 0; i++) { 6995 dvp = *tdvpp++; 6996 error = VFS_STATFS(dvp->v_mount, tsf); 6997 if (error == 0 && tsf->f_bavail > 0) { 6998 NFSD_DEBUG(1, "nfsrv_checknospc: reset nospc\n"); 6999 nfsrv_marknospc(tdevid, false); 7000 } 7001 tdevid += NFSX_V4DEVICEID; 7002 } 7003 free(tsf, M_TEMP); 7004 free(dvpp, M_TEMP); 7005 free(devid, M_TEMP); 7006 } 7007 7008 extern int (*nfsd_call_nfsd)(struct thread *, struct nfssvc_args *); 7009 7010 /* 7011 * Called once to initialize data structures... 7012 */ 7013 static int 7014 nfsd_modevent(module_t mod, int type, void *data) 7015 { 7016 int error = 0, i; 7017 static int loaded = 0; 7018 7019 switch (type) { 7020 case MOD_LOAD: 7021 if (loaded) 7022 goto out; 7023 newnfs_portinit(); 7024 for (i = 0; i < NFSRVCACHE_HASHSIZE; i++) { 7025 mtx_init(&nfsrchash_table[i].mtx, "nfsrtc", NULL, 7026 MTX_DEF); 7027 mtx_init(&nfsrcahash_table[i].mtx, "nfsrtca", NULL, 7028 MTX_DEF); 7029 } 7030 mtx_init(&nfsrc_udpmtx, "nfsuc", NULL, MTX_DEF); 7031 mtx_init(&nfs_v4root_mutex, "nfs4rt", NULL, MTX_DEF); 7032 mtx_init(&nfsv4root_mnt.mnt_mtx, "nfs4mnt", NULL, MTX_DEF); 7033 mtx_init(&nfsrv_dontlistlock_mtx, "nfs4dnl", NULL, MTX_DEF); 7034 mtx_init(&nfsrv_recalllock_mtx, "nfs4rec", NULL, MTX_DEF); 7035 lockinit(&nfsv4root_mnt.mnt_explock, PVFS, "explock", 0, 0); 7036 nfsrvd_initcache(); 7037 nfsd_init(); 7038 NFSD_LOCK(); 7039 nfsrvd_init(0); 7040 NFSD_UNLOCK(); 7041 nfsd_mntinit(); 7042 #ifdef VV_DISABLEDELEG 7043 vn_deleg_ops.vndeleg_recall = nfsd_recalldelegation; 7044 vn_deleg_ops.vndeleg_disable = nfsd_disabledelegation; 7045 #endif 7046 nfsd_call_servertimer = nfsrv_servertimer; 7047 nfsd_call_nfsd = nfssvc_nfsd; 7048 loaded = 1; 7049 break; 7050 7051 case MOD_UNLOAD: 7052 if (newnfs_numnfsd != 0) { 7053 error = EBUSY; 7054 break; 7055 } 7056 7057 #ifdef VV_DISABLEDELEG 7058 vn_deleg_ops.vndeleg_recall = NULL; 7059 vn_deleg_ops.vndeleg_disable = NULL; 7060 #endif 7061 nfsd_call_servertimer = NULL; 7062 nfsd_call_nfsd = NULL; 7063 7064 /* Clean out all NFSv4 state. */ 7065 nfsrv_throwawayallstate(curthread); 7066 7067 /* Clean the NFS server reply cache */ 7068 nfsrvd_cleancache(); 7069 7070 /* Free up the krpc server pool. */ 7071 if (nfsrvd_pool != NULL) 7072 svcpool_destroy(nfsrvd_pool); 7073 7074 /* and get rid of the locks */ 7075 for (i = 0; i < NFSRVCACHE_HASHSIZE; i++) { 7076 mtx_destroy(&nfsrchash_table[i].mtx); 7077 mtx_destroy(&nfsrcahash_table[i].mtx); 7078 } 7079 mtx_destroy(&nfsrc_udpmtx); 7080 mtx_destroy(&nfs_v4root_mutex); 7081 mtx_destroy(&nfsv4root_mnt.mnt_mtx); 7082 mtx_destroy(&nfsrv_dontlistlock_mtx); 7083 mtx_destroy(&nfsrv_recalllock_mtx); 7084 for (i = 0; i < nfsrv_sessionhashsize; i++) 7085 mtx_destroy(&nfssessionhash[i].mtx); 7086 if (nfslayouthash != NULL) { 7087 for (i = 0; i < nfsrv_layouthashsize; i++) 7088 mtx_destroy(&nfslayouthash[i].mtx); 7089 free(nfslayouthash, M_NFSDSESSION); 7090 } 7091 lockdestroy(&nfsv4root_mnt.mnt_explock); 7092 free(nfsclienthash, M_NFSDCLIENT); 7093 free(nfslockhash, M_NFSDLOCKFILE); 7094 free(nfssessionhash, M_NFSDSESSION); 7095 loaded = 0; 7096 break; 7097 default: 7098 error = EOPNOTSUPP; 7099 break; 7100 } 7101 7102 out: 7103 NFSEXITCODE(error); 7104 return (error); 7105 } 7106 static moduledata_t nfsd_mod = { 7107 "nfsd", 7108 nfsd_modevent, 7109 NULL, 7110 }; 7111 DECLARE_MODULE(nfsd, nfsd_mod, SI_SUB_VFS, SI_ORDER_ANY); 7112 7113 /* So that loader and kldload(2) can find us, wherever we are.. */ 7114 MODULE_VERSION(nfsd, 1); 7115 MODULE_DEPEND(nfsd, nfscommon, 1, 1, 1); 7116 MODULE_DEPEND(nfsd, nfslockd, 1, 1, 1); 7117 MODULE_DEPEND(nfsd, krpc, 1, 1, 1); 7118 MODULE_DEPEND(nfsd, nfssvc, 1, 1, 1); 7119