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, &aceerr, &aclsize, 2995 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 else if ((nd->nd_flag & ND_TLS) == 0) 4057 return (NFSERR_AUTHERR | AUTH_NEEDS_TLS); 4058 else 4059 return (NFSERR_AUTHERR | AUTH_NEEDS_TLS_MUTUAL_HOST); 4060 } 4061 4062 /* 4063 * This seems odd, but allow the case where the security flavor 4064 * list is empty. This happens when NFSv4 is traversing non-exported 4065 * file systems. Exported file systems should always have a non-empty 4066 * security flavor list. 4067 */ 4068 if (exp->nes_numsecflavor == 0) 4069 return (0); 4070 4071 for (i = 0; i < exp->nes_numsecflavor; i++) { 4072 /* 4073 * The tests for privacy and integrity must be first, 4074 * since ND_GSS is set for everything but AUTH_SYS. 4075 */ 4076 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5P && 4077 (nd->nd_flag & ND_GSSPRIVACY)) 4078 return (0); 4079 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5I && 4080 (nd->nd_flag & ND_GSSINTEGRITY)) 4081 return (0); 4082 if (exp->nes_secflavors[i] == RPCSEC_GSS_KRB5 && 4083 (nd->nd_flag & ND_GSS)) 4084 return (0); 4085 if (exp->nes_secflavors[i] == AUTH_SYS && 4086 (nd->nd_flag & ND_GSS) == 0) 4087 return (0); 4088 } 4089 if ((nd->nd_flag & ND_NFSV4) != 0) 4090 return (NFSERR_WRONGSEC); 4091 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 4092 } 4093 4094 /* 4095 * Calculate a hash value for the fid in a file handle. 4096 */ 4097 uint32_t 4098 nfsrv_hashfh(fhandle_t *fhp) 4099 { 4100 uint32_t hashval; 4101 4102 hashval = hash32_buf(&fhp->fh_fid, sizeof(struct fid), 0); 4103 return (hashval); 4104 } 4105 4106 /* 4107 * Calculate a hash value for the sessionid. 4108 */ 4109 uint32_t 4110 nfsrv_hashsessionid(uint8_t *sessionid) 4111 { 4112 uint32_t hashval; 4113 4114 hashval = hash32_buf(sessionid, NFSX_V4SESSIONID, 0); 4115 return (hashval); 4116 } 4117 4118 /* 4119 * Signal the userland master nfsd to backup the stable restart file. 4120 */ 4121 void 4122 nfsrv_backupstable(void) 4123 { 4124 struct proc *procp; 4125 4126 if (nfsd_master_proc != NULL) { 4127 procp = pfind(nfsd_master_pid); 4128 /* Try to make sure it is the correct process. */ 4129 if (procp == nfsd_master_proc && 4130 procp->p_stats->p_start.tv_sec == 4131 nfsd_master_start.tv_sec && 4132 procp->p_stats->p_start.tv_usec == 4133 nfsd_master_start.tv_usec && 4134 strcmp(procp->p_comm, nfsd_master_comm) == 0) 4135 kern_psignal(procp, SIGUSR2); 4136 else 4137 nfsd_master_proc = NULL; 4138 4139 if (procp != NULL) 4140 PROC_UNLOCK(procp); 4141 } 4142 } 4143 4144 /* 4145 * Create a DS data file for nfsrv_pnfscreate(). Called for each mirror. 4146 * The arguments are in a structure, so that they can be passed through 4147 * taskqueue for a kernel process to execute this function. 4148 */ 4149 struct nfsrvdscreate { 4150 int done; 4151 int inprog; 4152 struct task tsk; 4153 struct ucred *tcred; 4154 struct vnode *dvp; 4155 NFSPROC_T *p; 4156 struct pnfsdsfile *pf; 4157 int err; 4158 fhandle_t fh; 4159 struct vattr va; 4160 struct vattr createva; 4161 }; 4162 4163 int 4164 nfsrv_dscreate(struct vnode *dvp, struct vattr *vap, struct vattr *nvap, 4165 fhandle_t *fhp, struct pnfsdsfile *pf, struct pnfsdsattr *dsa, 4166 char *fnamep, struct ucred *tcred, NFSPROC_T *p, struct vnode **nvpp) 4167 { 4168 struct vnode *nvp; 4169 struct nameidata named; 4170 struct vattr va; 4171 char *bufp; 4172 u_long *hashp; 4173 struct nfsnode *np; 4174 struct nfsmount *nmp; 4175 int error; 4176 4177 NFSNAMEICNDSET(&named.ni_cnd, tcred, CREATE, 4178 LOCKPARENT | LOCKLEAF | SAVESTART | NOCACHE); 4179 nfsvno_setpathbuf(&named, &bufp, &hashp); 4180 named.ni_cnd.cn_lkflags = LK_EXCLUSIVE; 4181 named.ni_cnd.cn_nameptr = bufp; 4182 if (fnamep != NULL) { 4183 strlcpy(bufp, fnamep, PNFS_FILENAME_LEN + 1); 4184 named.ni_cnd.cn_namelen = strlen(bufp); 4185 } else 4186 named.ni_cnd.cn_namelen = nfsrv_putfhname(fhp, bufp); 4187 NFSD_DEBUG(4, "nfsrv_dscreate: dvp=%p fname=%s\n", dvp, bufp); 4188 4189 /* Create the date file in the DS mount. */ 4190 error = NFSVOPLOCK(dvp, LK_EXCLUSIVE); 4191 if (error == 0) { 4192 error = VOP_CREATE(dvp, &nvp, &named.ni_cnd, vap); 4193 vref(dvp); 4194 VOP_VPUT_PAIR(dvp, error == 0 ? &nvp : NULL, false); 4195 if (error == 0) { 4196 /* Set the ownership of the file. */ 4197 error = VOP_SETATTR(nvp, nvap, tcred); 4198 NFSD_DEBUG(4, "nfsrv_dscreate:" 4199 " setattr-uid=%d\n", error); 4200 if (error != 0) 4201 vput(nvp); 4202 } 4203 if (error != 0) 4204 printf("pNFS: pnfscreate failed=%d\n", error); 4205 } else 4206 printf("pNFS: pnfscreate vnlock=%d\n", error); 4207 if (error == 0) { 4208 np = VTONFS(nvp); 4209 nmp = VFSTONFS(nvp->v_mount); 4210 if (strcmp(nvp->v_mount->mnt_vfc->vfc_name, "nfs") 4211 != 0 || nmp->nm_nam->sa_len > sizeof( 4212 struct sockaddr_in6) || 4213 np->n_fhp->nfh_len != NFSX_MYFH) { 4214 printf("Bad DS file: fstype=%s salen=%d" 4215 " fhlen=%d\n", 4216 nvp->v_mount->mnt_vfc->vfc_name, 4217 nmp->nm_nam->sa_len, np->n_fhp->nfh_len); 4218 error = ENOENT; 4219 } 4220 4221 /* Set extattrs for the DS on the MDS file. */ 4222 if (error == 0) { 4223 if (dsa != NULL) { 4224 error = VOP_GETATTR(nvp, &va, tcred); 4225 if (error == 0) { 4226 dsa->dsa_filerev = va.va_filerev; 4227 dsa->dsa_size = va.va_size; 4228 dsa->dsa_atime = va.va_atime; 4229 dsa->dsa_mtime = va.va_mtime; 4230 dsa->dsa_bytes = va.va_bytes; 4231 } 4232 } 4233 if (error == 0) { 4234 NFSBCOPY(np->n_fhp->nfh_fh, &pf->dsf_fh, 4235 NFSX_MYFH); 4236 NFSBCOPY(nmp->nm_nam, &pf->dsf_sin, 4237 nmp->nm_nam->sa_len); 4238 NFSBCOPY(named.ni_cnd.cn_nameptr, 4239 pf->dsf_filename, 4240 sizeof(pf->dsf_filename)); 4241 } 4242 } else 4243 printf("pNFS: pnfscreate can't get DS" 4244 " attr=%d\n", error); 4245 if (nvpp != NULL && error == 0) 4246 *nvpp = nvp; 4247 else 4248 vput(nvp); 4249 } 4250 nfsvno_relpathbuf(&named); 4251 return (error); 4252 } 4253 4254 /* 4255 * Start up the thread that will execute nfsrv_dscreate(). 4256 */ 4257 static void 4258 start_dscreate(void *arg, int pending) 4259 { 4260 struct nfsrvdscreate *dsc; 4261 4262 dsc = (struct nfsrvdscreate *)arg; 4263 dsc->err = nfsrv_dscreate(dsc->dvp, &dsc->createva, &dsc->va, &dsc->fh, 4264 dsc->pf, NULL, NULL, dsc->tcred, dsc->p, NULL); 4265 dsc->done = 1; 4266 NFSD_DEBUG(4, "start_dscreate: err=%d\n", dsc->err); 4267 } 4268 4269 /* 4270 * Create a pNFS data file on the Data Server(s). 4271 */ 4272 static void 4273 nfsrv_pnfscreate(struct vnode *vp, struct vattr *vap, struct ucred *cred, 4274 NFSPROC_T *p) 4275 { 4276 struct nfsrvdscreate *dsc, *tdsc = NULL; 4277 struct nfsdevice *ds, *tds, *fds; 4278 struct mount *mp; 4279 struct pnfsdsfile *pf, *tpf; 4280 struct pnfsdsattr dsattr; 4281 struct vattr va; 4282 struct vnode *dvp[NFSDEV_MAXMIRRORS]; 4283 struct nfsmount *nmp; 4284 fhandle_t fh; 4285 uid_t vauid; 4286 gid_t vagid; 4287 u_short vamode; 4288 struct ucred *tcred; 4289 int dsdir[NFSDEV_MAXMIRRORS], error, i, mirrorcnt, ret; 4290 int failpos, timo; 4291 4292 /* Get a DS server directory in a round-robin order. */ 4293 mirrorcnt = 1; 4294 mp = vp->v_mount; 4295 ds = fds = NULL; 4296 NFSDDSLOCK(); 4297 /* 4298 * Search for the first entry that handles this MDS fs, but use the 4299 * first entry for all MDS fs's otherwise. 4300 */ 4301 TAILQ_FOREACH(tds, &nfsrv_devidhead, nfsdev_list) { 4302 if (tds->nfsdev_nmp != NULL) { 4303 if (tds->nfsdev_mdsisset == 0 && ds == NULL) 4304 ds = tds; 4305 else if (tds->nfsdev_mdsisset != 0 && fsidcmp( 4306 &mp->mnt_stat.f_fsid, &tds->nfsdev_mdsfsid) == 0) { 4307 ds = fds = tds; 4308 break; 4309 } 4310 } 4311 } 4312 if (ds == NULL) { 4313 NFSDDSUNLOCK(); 4314 NFSD_DEBUG(4, "nfsrv_pnfscreate: no srv\n"); 4315 return; 4316 } 4317 i = dsdir[0] = ds->nfsdev_nextdir; 4318 ds->nfsdev_nextdir = (ds->nfsdev_nextdir + 1) % nfsrv_dsdirsize; 4319 dvp[0] = ds->nfsdev_dsdir[i]; 4320 tds = TAILQ_NEXT(ds, nfsdev_list); 4321 if (nfsrv_maxpnfsmirror > 1 && tds != NULL) { 4322 TAILQ_FOREACH_FROM(tds, &nfsrv_devidhead, nfsdev_list) { 4323 if (tds->nfsdev_nmp != NULL && 4324 ((tds->nfsdev_mdsisset == 0 && fds == NULL) || 4325 (tds->nfsdev_mdsisset != 0 && fds != NULL && 4326 fsidcmp(&mp->mnt_stat.f_fsid, 4327 &tds->nfsdev_mdsfsid) == 0))) { 4328 dsdir[mirrorcnt] = i; 4329 dvp[mirrorcnt] = tds->nfsdev_dsdir[i]; 4330 mirrorcnt++; 4331 if (mirrorcnt >= nfsrv_maxpnfsmirror) 4332 break; 4333 } 4334 } 4335 } 4336 /* Put at end of list to implement round-robin usage. */ 4337 TAILQ_REMOVE(&nfsrv_devidhead, ds, nfsdev_list); 4338 TAILQ_INSERT_TAIL(&nfsrv_devidhead, ds, nfsdev_list); 4339 NFSDDSUNLOCK(); 4340 dsc = NULL; 4341 if (mirrorcnt > 1) 4342 tdsc = dsc = malloc(sizeof(*dsc) * (mirrorcnt - 1), M_TEMP, 4343 M_WAITOK | M_ZERO); 4344 tpf = pf = malloc(sizeof(*pf) * nfsrv_maxpnfsmirror, M_TEMP, M_WAITOK | 4345 M_ZERO); 4346 4347 error = nfsvno_getfh(vp, &fh, p); 4348 if (error == 0) 4349 error = VOP_GETATTR(vp, &va, cred); 4350 if (error == 0) { 4351 /* Set the attributes for "vp" to Setattr the DS vp. */ 4352 vauid = va.va_uid; 4353 vagid = va.va_gid; 4354 vamode = va.va_mode; 4355 VATTR_NULL(&va); 4356 va.va_uid = vauid; 4357 va.va_gid = vagid; 4358 va.va_mode = vamode; 4359 va.va_size = 0; 4360 } else 4361 printf("pNFS: pnfscreate getfh+attr=%d\n", error); 4362 4363 NFSD_DEBUG(4, "nfsrv_pnfscreate: cruid=%d crgid=%d\n", cred->cr_uid, 4364 cred->cr_gid); 4365 /* Make data file name based on FH. */ 4366 tcred = newnfs_getcred(); 4367 4368 /* 4369 * Create the file on each DS mirror, using kernel process(es) for the 4370 * additional mirrors. 4371 */ 4372 failpos = -1; 4373 for (i = 0; i < mirrorcnt - 1 && error == 0; i++, tpf++, tdsc++) { 4374 tpf->dsf_dir = dsdir[i]; 4375 tdsc->tcred = tcred; 4376 tdsc->p = p; 4377 tdsc->pf = tpf; 4378 tdsc->createva = *vap; 4379 NFSBCOPY(&fh, &tdsc->fh, sizeof(fh)); 4380 tdsc->va = va; 4381 tdsc->dvp = dvp[i]; 4382 tdsc->done = 0; 4383 tdsc->inprog = 0; 4384 tdsc->err = 0; 4385 ret = EIO; 4386 if (nfs_pnfsiothreads != 0) { 4387 ret = nfs_pnfsio(start_dscreate, tdsc); 4388 NFSD_DEBUG(4, "nfsrv_pnfscreate: nfs_pnfsio=%d\n", ret); 4389 } 4390 if (ret != 0) { 4391 ret = nfsrv_dscreate(dvp[i], vap, &va, &fh, tpf, NULL, 4392 NULL, tcred, p, NULL); 4393 if (ret != 0) { 4394 KASSERT(error == 0, ("nfsrv_dscreate err=%d", 4395 error)); 4396 if (failpos == -1 && nfsds_failerr(ret)) 4397 failpos = i; 4398 else 4399 error = ret; 4400 } 4401 } 4402 } 4403 if (error == 0) { 4404 tpf->dsf_dir = dsdir[mirrorcnt - 1]; 4405 error = nfsrv_dscreate(dvp[mirrorcnt - 1], vap, &va, &fh, tpf, 4406 &dsattr, NULL, tcred, p, NULL); 4407 if (failpos == -1 && mirrorcnt > 1 && nfsds_failerr(error)) { 4408 failpos = mirrorcnt - 1; 4409 error = 0; 4410 } 4411 } 4412 timo = hz / 50; /* Wait for 20msec. */ 4413 if (timo < 1) 4414 timo = 1; 4415 /* Wait for kernel task(s) to complete. */ 4416 for (tdsc = dsc, i = 0; i < mirrorcnt - 1; i++, tdsc++) { 4417 while (tdsc->inprog != 0 && tdsc->done == 0) 4418 tsleep(&tdsc->tsk, PVFS, "srvdcr", timo); 4419 if (tdsc->err != 0) { 4420 if (failpos == -1 && nfsds_failerr(tdsc->err)) 4421 failpos = i; 4422 else if (error == 0) 4423 error = tdsc->err; 4424 } 4425 } 4426 4427 /* 4428 * If failpos has been set, that mirror has failed, so it needs 4429 * to be disabled. 4430 */ 4431 if (failpos >= 0) { 4432 nmp = VFSTONFS(dvp[failpos]->v_mount); 4433 NFSLOCKMNT(nmp); 4434 if ((nmp->nm_privflag & (NFSMNTP_FORCEDISM | 4435 NFSMNTP_CANCELRPCS)) == 0) { 4436 nmp->nm_privflag |= NFSMNTP_CANCELRPCS; 4437 NFSUNLOCKMNT(nmp); 4438 ds = nfsrv_deldsnmp(PNFSDOP_DELDSSERVER, nmp, p); 4439 NFSD_DEBUG(4, "dscreatfail fail=%d ds=%p\n", failpos, 4440 ds); 4441 if (ds != NULL) 4442 nfsrv_killrpcs(nmp); 4443 NFSLOCKMNT(nmp); 4444 nmp->nm_privflag &= ~NFSMNTP_CANCELRPCS; 4445 wakeup(nmp); 4446 } 4447 NFSUNLOCKMNT(nmp); 4448 } 4449 4450 NFSFREECRED(tcred); 4451 if (error == 0) { 4452 ASSERT_VOP_ELOCKED(vp, "nfsrv_pnfscreate vp"); 4453 4454 NFSD_DEBUG(4, "nfsrv_pnfscreate: mirrorcnt=%d maxmirror=%d\n", 4455 mirrorcnt, nfsrv_maxpnfsmirror); 4456 /* 4457 * For all mirrors that couldn't be created, fill in the 4458 * *pf structure, but with an IP address == 0.0.0.0. 4459 */ 4460 tpf = pf + mirrorcnt; 4461 for (i = mirrorcnt; i < nfsrv_maxpnfsmirror; i++, tpf++) { 4462 *tpf = *pf; 4463 tpf->dsf_sin.sin_family = AF_INET; 4464 tpf->dsf_sin.sin_len = sizeof(struct sockaddr_in); 4465 tpf->dsf_sin.sin_addr.s_addr = 0; 4466 tpf->dsf_sin.sin_port = 0; 4467 } 4468 4469 error = vn_extattr_set(vp, IO_NODELOCKED, 4470 EXTATTR_NAMESPACE_SYSTEM, "pnfsd.dsfile", 4471 sizeof(*pf) * nfsrv_maxpnfsmirror, (char *)pf, p); 4472 if (error == 0) 4473 error = vn_extattr_set(vp, IO_NODELOCKED, 4474 EXTATTR_NAMESPACE_SYSTEM, "pnfsd.dsattr", 4475 sizeof(dsattr), (char *)&dsattr, p); 4476 if (error != 0) 4477 printf("pNFS: pnfscreate setextattr=%d\n", 4478 error); 4479 } else 4480 printf("pNFS: pnfscreate=%d\n", error); 4481 free(pf, M_TEMP); 4482 free(dsc, M_TEMP); 4483 } 4484 4485 /* 4486 * Get the information needed to remove the pNFS Data Server file from the 4487 * Metadata file. Upon success, ddvp is set non-NULL to the locked 4488 * DS directory vnode. The caller must unlock *ddvp when done with it. 4489 */ 4490 static void 4491 nfsrv_pnfsremovesetup(struct vnode *vp, NFSPROC_T *p, struct vnode **dvpp, 4492 int *mirrorcntp, char *fname, fhandle_t *fhp) 4493 { 4494 struct vattr va; 4495 struct ucred *tcred; 4496 char *buf; 4497 int buflen, error; 4498 4499 dvpp[0] = NULL; 4500 /* If not an exported regular file or not a pNFS server, just return. */ 4501 if (vp->v_type != VREG || (vp->v_mount->mnt_flag & MNT_EXPORTED) == 0 || 4502 nfsrv_devidcnt == 0) 4503 return; 4504 4505 /* Check to see if this is the last hard link. */ 4506 tcred = newnfs_getcred(); 4507 error = VOP_GETATTR(vp, &va, tcred); 4508 NFSFREECRED(tcred); 4509 if (error != 0) { 4510 printf("pNFS: nfsrv_pnfsremovesetup getattr=%d\n", error); 4511 return; 4512 } 4513 if (va.va_nlink > 1) 4514 return; 4515 4516 error = nfsvno_getfh(vp, fhp, p); 4517 if (error != 0) { 4518 printf("pNFS: nfsrv_pnfsremovesetup getfh=%d\n", error); 4519 return; 4520 } 4521 4522 buflen = 1024; 4523 buf = malloc(buflen, M_TEMP, M_WAITOK); 4524 /* Get the directory vnode for the DS mount and the file handle. */ 4525 error = nfsrv_dsgetsockmnt(vp, 0, buf, &buflen, mirrorcntp, p, dvpp, 4526 NULL, NULL, fname, NULL, NULL, NULL, NULL, NULL); 4527 free(buf, M_TEMP); 4528 if (error != 0) 4529 printf("pNFS: nfsrv_pnfsremovesetup getsockmnt=%d\n", error); 4530 } 4531 4532 /* 4533 * Remove a DS data file for nfsrv_pnfsremove(). Called for each mirror. 4534 * The arguments are in a structure, so that they can be passed through 4535 * taskqueue for a kernel process to execute this function. 4536 */ 4537 struct nfsrvdsremove { 4538 int done; 4539 int inprog; 4540 struct task tsk; 4541 struct ucred *tcred; 4542 struct vnode *dvp; 4543 NFSPROC_T *p; 4544 int err; 4545 char fname[PNFS_FILENAME_LEN + 1]; 4546 }; 4547 4548 static int 4549 nfsrv_dsremove(struct vnode *dvp, char *fname, struct ucred *tcred, 4550 NFSPROC_T *p) 4551 { 4552 struct nameidata named; 4553 struct vnode *nvp; 4554 char *bufp; 4555 u_long *hashp; 4556 int error; 4557 4558 error = NFSVOPLOCK(dvp, LK_EXCLUSIVE); 4559 if (error != 0) 4560 return (error); 4561 named.ni_cnd.cn_nameiop = DELETE; 4562 named.ni_cnd.cn_lkflags = LK_EXCLUSIVE | LK_RETRY; 4563 named.ni_cnd.cn_cred = tcred; 4564 named.ni_cnd.cn_flags = ISLASTCN | LOCKPARENT | LOCKLEAF | SAVENAME; 4565 nfsvno_setpathbuf(&named, &bufp, &hashp); 4566 named.ni_cnd.cn_nameptr = bufp; 4567 named.ni_cnd.cn_namelen = strlen(fname); 4568 strlcpy(bufp, fname, NAME_MAX); 4569 NFSD_DEBUG(4, "nfsrv_pnfsremove: filename=%s\n", bufp); 4570 error = VOP_LOOKUP(dvp, &nvp, &named.ni_cnd); 4571 NFSD_DEBUG(4, "nfsrv_pnfsremove: aft LOOKUP=%d\n", error); 4572 if (error == 0) { 4573 error = VOP_REMOVE(dvp, nvp, &named.ni_cnd); 4574 vput(nvp); 4575 } 4576 NFSVOPUNLOCK(dvp); 4577 nfsvno_relpathbuf(&named); 4578 if (error != 0) 4579 printf("pNFS: nfsrv_pnfsremove failed=%d\n", error); 4580 return (error); 4581 } 4582 4583 /* 4584 * Start up the thread that will execute nfsrv_dsremove(). 4585 */ 4586 static void 4587 start_dsremove(void *arg, int pending) 4588 { 4589 struct nfsrvdsremove *dsrm; 4590 4591 dsrm = (struct nfsrvdsremove *)arg; 4592 dsrm->err = nfsrv_dsremove(dsrm->dvp, dsrm->fname, dsrm->tcred, 4593 dsrm->p); 4594 dsrm->done = 1; 4595 NFSD_DEBUG(4, "start_dsremove: err=%d\n", dsrm->err); 4596 } 4597 4598 /* 4599 * Remove a pNFS data file from a Data Server. 4600 * nfsrv_pnfsremovesetup() must have been called before the MDS file was 4601 * removed to set up the dvp and fill in the FH. 4602 */ 4603 static void 4604 nfsrv_pnfsremove(struct vnode **dvp, int mirrorcnt, char *fname, fhandle_t *fhp, 4605 NFSPROC_T *p) 4606 { 4607 struct ucred *tcred; 4608 struct nfsrvdsremove *dsrm, *tdsrm; 4609 struct nfsdevice *ds; 4610 struct nfsmount *nmp; 4611 int failpos, i, ret, timo; 4612 4613 tcred = newnfs_getcred(); 4614 dsrm = NULL; 4615 if (mirrorcnt > 1) 4616 dsrm = malloc(sizeof(*dsrm) * mirrorcnt - 1, M_TEMP, M_WAITOK); 4617 /* 4618 * Remove the file on each DS mirror, using kernel process(es) for the 4619 * additional mirrors. 4620 */ 4621 failpos = -1; 4622 for (tdsrm = dsrm, i = 0; i < mirrorcnt - 1; i++, tdsrm++) { 4623 tdsrm->tcred = tcred; 4624 tdsrm->p = p; 4625 tdsrm->dvp = dvp[i]; 4626 strlcpy(tdsrm->fname, fname, PNFS_FILENAME_LEN + 1); 4627 tdsrm->inprog = 0; 4628 tdsrm->done = 0; 4629 tdsrm->err = 0; 4630 ret = EIO; 4631 if (nfs_pnfsiothreads != 0) { 4632 ret = nfs_pnfsio(start_dsremove, tdsrm); 4633 NFSD_DEBUG(4, "nfsrv_pnfsremove: nfs_pnfsio=%d\n", ret); 4634 } 4635 if (ret != 0) { 4636 ret = nfsrv_dsremove(dvp[i], fname, tcred, p); 4637 if (failpos == -1 && nfsds_failerr(ret)) 4638 failpos = i; 4639 } 4640 } 4641 ret = nfsrv_dsremove(dvp[mirrorcnt - 1], fname, tcred, p); 4642 if (failpos == -1 && mirrorcnt > 1 && nfsds_failerr(ret)) 4643 failpos = mirrorcnt - 1; 4644 timo = hz / 50; /* Wait for 20msec. */ 4645 if (timo < 1) 4646 timo = 1; 4647 /* Wait for kernel task(s) to complete. */ 4648 for (tdsrm = dsrm, i = 0; i < mirrorcnt - 1; i++, tdsrm++) { 4649 while (tdsrm->inprog != 0 && tdsrm->done == 0) 4650 tsleep(&tdsrm->tsk, PVFS, "srvdsrm", timo); 4651 if (failpos == -1 && nfsds_failerr(tdsrm->err)) 4652 failpos = i; 4653 } 4654 4655 /* 4656 * If failpos has been set, that mirror has failed, so it needs 4657 * to be disabled. 4658 */ 4659 if (failpos >= 0) { 4660 nmp = VFSTONFS(dvp[failpos]->v_mount); 4661 NFSLOCKMNT(nmp); 4662 if ((nmp->nm_privflag & (NFSMNTP_FORCEDISM | 4663 NFSMNTP_CANCELRPCS)) == 0) { 4664 nmp->nm_privflag |= NFSMNTP_CANCELRPCS; 4665 NFSUNLOCKMNT(nmp); 4666 ds = nfsrv_deldsnmp(PNFSDOP_DELDSSERVER, nmp, p); 4667 NFSD_DEBUG(4, "dsremovefail fail=%d ds=%p\n", failpos, 4668 ds); 4669 if (ds != NULL) 4670 nfsrv_killrpcs(nmp); 4671 NFSLOCKMNT(nmp); 4672 nmp->nm_privflag &= ~NFSMNTP_CANCELRPCS; 4673 wakeup(nmp); 4674 } 4675 NFSUNLOCKMNT(nmp); 4676 } 4677 4678 /* Get rid all layouts for the file. */ 4679 nfsrv_freefilelayouts(fhp); 4680 4681 NFSFREECRED(tcred); 4682 free(dsrm, M_TEMP); 4683 } 4684 4685 /* 4686 * Generate a file name based on the file handle and put it in *bufp. 4687 * Return the number of bytes generated. 4688 */ 4689 static int 4690 nfsrv_putfhname(fhandle_t *fhp, char *bufp) 4691 { 4692 int i; 4693 uint8_t *cp; 4694 const uint8_t *hexdigits = "0123456789abcdef"; 4695 4696 cp = (uint8_t *)fhp; 4697 for (i = 0; i < sizeof(*fhp); i++) { 4698 bufp[2 * i] = hexdigits[(*cp >> 4) & 0xf]; 4699 bufp[2 * i + 1] = hexdigits[*cp++ & 0xf]; 4700 } 4701 bufp[2 * i] = '\0'; 4702 return (2 * i); 4703 } 4704 4705 /* 4706 * Update the Metadata file's attributes from the DS file when a Read/Write 4707 * layout is returned. 4708 * Basically just call nfsrv_proxyds() with procedure == NFSPROC_LAYOUTRETURN 4709 * so that it does a nfsrv_getattrdsrpc() and nfsrv_setextattr() on the DS file. 4710 */ 4711 int 4712 nfsrv_updatemdsattr(struct vnode *vp, struct nfsvattr *nap, NFSPROC_T *p) 4713 { 4714 struct ucred *tcred; 4715 int error; 4716 4717 /* Do this as root so that it won't fail with EACCES. */ 4718 tcred = newnfs_getcred(); 4719 error = nfsrv_proxyds(vp, 0, 0, tcred, p, NFSPROC_LAYOUTRETURN, 4720 NULL, NULL, NULL, nap, NULL, NULL, 0, NULL); 4721 NFSFREECRED(tcred); 4722 return (error); 4723 } 4724 4725 /* 4726 * Set the NFSv4 ACL on the DS file to the same ACL as the MDS file. 4727 */ 4728 static int 4729 nfsrv_dssetacl(struct vnode *vp, struct acl *aclp, struct ucred *cred, 4730 NFSPROC_T *p) 4731 { 4732 int error; 4733 4734 error = nfsrv_proxyds(vp, 0, 0, cred, p, NFSPROC_SETACL, 4735 NULL, NULL, NULL, NULL, aclp, NULL, 0, NULL); 4736 return (error); 4737 } 4738 4739 static int 4740 nfsrv_proxyds(struct vnode *vp, off_t off, int cnt, struct ucred *cred, 4741 struct thread *p, int ioproc, struct mbuf **mpp, char *cp, 4742 struct mbuf **mpp2, struct nfsvattr *nap, struct acl *aclp, 4743 off_t *offp, int content, bool *eofp) 4744 { 4745 struct nfsmount *nmp[NFSDEV_MAXMIRRORS], *failnmp; 4746 fhandle_t fh[NFSDEV_MAXMIRRORS]; 4747 struct vnode *dvp[NFSDEV_MAXMIRRORS]; 4748 struct nfsdevice *ds; 4749 struct pnfsdsattr dsattr; 4750 struct opnfsdsattr odsattr; 4751 char *buf; 4752 int buflen, error, failpos, i, mirrorcnt, origmircnt, trycnt; 4753 4754 NFSD_DEBUG(4, "in nfsrv_proxyds\n"); 4755 /* 4756 * If not a regular file, not exported or not a pNFS server, 4757 * just return ENOENT. 4758 */ 4759 if (vp->v_type != VREG || (vp->v_mount->mnt_flag & MNT_EXPORTED) == 0 || 4760 nfsrv_devidcnt == 0) 4761 return (ENOENT); 4762 4763 buflen = 1024; 4764 buf = malloc(buflen, M_TEMP, M_WAITOK); 4765 error = 0; 4766 4767 /* 4768 * For Getattr, get the Change attribute (va_filerev) and size (va_size) 4769 * from the MetaData file's extended attribute. 4770 */ 4771 if (ioproc == NFSPROC_GETATTR) { 4772 error = vn_extattr_get(vp, IO_NODELOCKED, 4773 EXTATTR_NAMESPACE_SYSTEM, "pnfsd.dsattr", &buflen, buf, 4774 p); 4775 if (error == 0) { 4776 if (buflen == sizeof(odsattr)) { 4777 NFSBCOPY(buf, &odsattr, buflen); 4778 nap->na_filerev = odsattr.dsa_filerev; 4779 nap->na_size = odsattr.dsa_size; 4780 nap->na_atime = odsattr.dsa_atime; 4781 nap->na_mtime = odsattr.dsa_mtime; 4782 /* 4783 * Fake na_bytes by rounding up na_size. 4784 * Since we don't know the block size, just 4785 * use BLKDEV_IOSIZE. 4786 */ 4787 nap->na_bytes = (odsattr.dsa_size + 4788 BLKDEV_IOSIZE - 1) & ~(BLKDEV_IOSIZE - 1); 4789 } else if (buflen == sizeof(dsattr)) { 4790 NFSBCOPY(buf, &dsattr, buflen); 4791 nap->na_filerev = dsattr.dsa_filerev; 4792 nap->na_size = dsattr.dsa_size; 4793 nap->na_atime = dsattr.dsa_atime; 4794 nap->na_mtime = dsattr.dsa_mtime; 4795 nap->na_bytes = dsattr.dsa_bytes; 4796 } else 4797 error = ENXIO; 4798 } 4799 if (error == 0) { 4800 /* 4801 * If nfsrv_pnfsgetdsattr is 0 or nfsrv_checkdsattr() 4802 * returns 0, just return now. nfsrv_checkdsattr() 4803 * returns 0 if there is no Read/Write layout 4804 * plus either an Open/Write_access or Write 4805 * delegation issued to a client for the file. 4806 */ 4807 if (nfsrv_pnfsgetdsattr == 0 || 4808 nfsrv_checkdsattr(vp, p) == 0) { 4809 free(buf, M_TEMP); 4810 return (error); 4811 } 4812 } 4813 4814 /* 4815 * Clear ENOATTR so the code below will attempt to do a 4816 * nfsrv_getattrdsrpc() to get the attributes and (re)create 4817 * the extended attribute. 4818 */ 4819 if (error == ENOATTR) 4820 error = 0; 4821 } 4822 4823 origmircnt = -1; 4824 trycnt = 0; 4825 tryagain: 4826 if (error == 0) { 4827 buflen = 1024; 4828 if (ioproc == NFSPROC_READDS && NFSVOPISLOCKED(vp) == 4829 LK_EXCLUSIVE) 4830 printf("nfsrv_proxyds: Readds vp exclusively locked\n"); 4831 error = nfsrv_dsgetsockmnt(vp, LK_SHARED, buf, &buflen, 4832 &mirrorcnt, p, dvp, fh, NULL, NULL, NULL, NULL, NULL, 4833 NULL, NULL); 4834 if (error == 0) { 4835 for (i = 0; i < mirrorcnt; i++) 4836 nmp[i] = VFSTONFS(dvp[i]->v_mount); 4837 } else 4838 printf("pNFS: proxy getextattr sockaddr=%d\n", error); 4839 } else 4840 printf("pNFS: nfsrv_dsgetsockmnt=%d\n", error); 4841 if (error == 0) { 4842 failpos = -1; 4843 if (origmircnt == -1) 4844 origmircnt = mirrorcnt; 4845 /* 4846 * If failpos is set to a mirror#, then that mirror has 4847 * failed and will be disabled. For Read, Getattr and Seek, the 4848 * function only tries one mirror, so if that mirror has 4849 * failed, it will need to be retried. As such, increment 4850 * tryitagain for these cases. 4851 * For Write, Setattr and Setacl, the function tries all 4852 * mirrors and will not return an error for the case where 4853 * one mirror has failed. For these cases, the functioning 4854 * mirror(s) will have been modified, so a retry isn't 4855 * necessary. These functions will set failpos for the 4856 * failed mirror#. 4857 */ 4858 if (ioproc == NFSPROC_READDS) { 4859 error = nfsrv_readdsrpc(fh, off, cnt, cred, p, nmp[0], 4860 mpp, mpp2); 4861 if (nfsds_failerr(error) && mirrorcnt > 1) { 4862 /* 4863 * Setting failpos will cause the mirror 4864 * to be disabled and then a retry of this 4865 * read is required. 4866 */ 4867 failpos = 0; 4868 error = 0; 4869 trycnt++; 4870 } 4871 } else if (ioproc == NFSPROC_WRITEDS) 4872 error = nfsrv_writedsrpc(fh, off, cnt, cred, p, vp, 4873 &nmp[0], mirrorcnt, mpp, cp, &failpos); 4874 else if (ioproc == NFSPROC_SETATTR) 4875 error = nfsrv_setattrdsrpc(fh, cred, p, vp, &nmp[0], 4876 mirrorcnt, nap, &failpos); 4877 else if (ioproc == NFSPROC_SETACL) 4878 error = nfsrv_setacldsrpc(fh, cred, p, vp, &nmp[0], 4879 mirrorcnt, aclp, &failpos); 4880 else if (ioproc == NFSPROC_SEEKDS) { 4881 error = nfsrv_seekdsrpc(fh, offp, content, eofp, cred, 4882 p, nmp[0]); 4883 if (nfsds_failerr(error) && mirrorcnt > 1) { 4884 /* 4885 * Setting failpos will cause the mirror 4886 * to be disabled and then a retry of this 4887 * read is required. 4888 */ 4889 failpos = 0; 4890 error = 0; 4891 trycnt++; 4892 } 4893 } else if (ioproc == NFSPROC_ALLOCATE) 4894 error = nfsrv_allocatedsrpc(fh, off, *offp, cred, p, vp, 4895 &nmp[0], mirrorcnt, &failpos); 4896 else if (ioproc == NFSPROC_DEALLOCATE) 4897 error = nfsrv_deallocatedsrpc(fh, off, *offp, cred, p, 4898 vp, &nmp[0], mirrorcnt, &failpos); 4899 else { 4900 error = nfsrv_getattrdsrpc(&fh[mirrorcnt - 1], cred, p, 4901 vp, nmp[mirrorcnt - 1], nap); 4902 if (nfsds_failerr(error) && mirrorcnt > 1) { 4903 /* 4904 * Setting failpos will cause the mirror 4905 * to be disabled and then a retry of this 4906 * getattr is required. 4907 */ 4908 failpos = mirrorcnt - 1; 4909 error = 0; 4910 trycnt++; 4911 } 4912 } 4913 ds = NULL; 4914 if (failpos >= 0) { 4915 failnmp = nmp[failpos]; 4916 NFSLOCKMNT(failnmp); 4917 if ((failnmp->nm_privflag & (NFSMNTP_FORCEDISM | 4918 NFSMNTP_CANCELRPCS)) == 0) { 4919 failnmp->nm_privflag |= NFSMNTP_CANCELRPCS; 4920 NFSUNLOCKMNT(failnmp); 4921 ds = nfsrv_deldsnmp(PNFSDOP_DELDSSERVER, 4922 failnmp, p); 4923 NFSD_DEBUG(4, "dsldsnmp fail=%d ds=%p\n", 4924 failpos, ds); 4925 if (ds != NULL) 4926 nfsrv_killrpcs(failnmp); 4927 NFSLOCKMNT(failnmp); 4928 failnmp->nm_privflag &= ~NFSMNTP_CANCELRPCS; 4929 wakeup(failnmp); 4930 } 4931 NFSUNLOCKMNT(failnmp); 4932 } 4933 for (i = 0; i < mirrorcnt; i++) 4934 NFSVOPUNLOCK(dvp[i]); 4935 NFSD_DEBUG(4, "nfsrv_proxyds: aft RPC=%d trya=%d\n", error, 4936 trycnt); 4937 /* Try the Read/Getattr again if a mirror was deleted. */ 4938 if (ds != NULL && trycnt > 0 && trycnt < origmircnt) 4939 goto tryagain; 4940 } else { 4941 /* Return ENOENT for any Extended Attribute error. */ 4942 error = ENOENT; 4943 } 4944 free(buf, M_TEMP); 4945 NFSD_DEBUG(4, "nfsrv_proxyds: error=%d\n", error); 4946 return (error); 4947 } 4948 4949 /* 4950 * Get the DS mount point, fh and directory from the "pnfsd.dsfile" extended 4951 * attribute. 4952 * newnmpp - If it points to a non-NULL nmp, that is the destination and needs 4953 * to be checked. If it points to a NULL nmp, then it returns 4954 * a suitable destination. 4955 * curnmp - If non-NULL, it is the source mount for the copy. 4956 */ 4957 int 4958 nfsrv_dsgetsockmnt(struct vnode *vp, int lktype, char *buf, int *buflenp, 4959 int *mirrorcntp, NFSPROC_T *p, struct vnode **dvpp, fhandle_t *fhp, 4960 char *devid, char *fnamep, struct vnode **nvpp, struct nfsmount **newnmpp, 4961 struct nfsmount *curnmp, int *ippos, int *dsdirp) 4962 { 4963 struct vnode *dvp, *nvp = NULL, **tdvpp; 4964 struct mount *mp; 4965 struct nfsmount *nmp, *newnmp; 4966 struct sockaddr *sad; 4967 struct sockaddr_in *sin; 4968 struct nfsdevice *ds, *tds, *fndds; 4969 struct pnfsdsfile *pf; 4970 uint32_t dsdir; 4971 int error, fhiszero, fnd, gotone, i, mirrorcnt; 4972 4973 ASSERT_VOP_LOCKED(vp, "nfsrv_dsgetsockmnt vp"); 4974 *mirrorcntp = 1; 4975 tdvpp = dvpp; 4976 if (nvpp != NULL) 4977 *nvpp = NULL; 4978 if (dvpp != NULL) 4979 *dvpp = NULL; 4980 if (ippos != NULL) 4981 *ippos = -1; 4982 if (newnmpp != NULL) 4983 newnmp = *newnmpp; 4984 else 4985 newnmp = NULL; 4986 mp = vp->v_mount; 4987 error = vn_extattr_get(vp, IO_NODELOCKED, EXTATTR_NAMESPACE_SYSTEM, 4988 "pnfsd.dsfile", buflenp, buf, p); 4989 mirrorcnt = *buflenp / sizeof(*pf); 4990 if (error == 0 && (mirrorcnt < 1 || mirrorcnt > NFSDEV_MAXMIRRORS || 4991 *buflenp != sizeof(*pf) * mirrorcnt)) 4992 error = ENOATTR; 4993 4994 pf = (struct pnfsdsfile *)buf; 4995 /* If curnmp != NULL, check for a match in the mirror list. */ 4996 if (curnmp != NULL && error == 0) { 4997 fnd = 0; 4998 for (i = 0; i < mirrorcnt; i++, pf++) { 4999 sad = (struct sockaddr *)&pf->dsf_sin; 5000 if (nfsaddr2_match(sad, curnmp->nm_nam)) { 5001 if (ippos != NULL) 5002 *ippos = i; 5003 fnd = 1; 5004 break; 5005 } 5006 } 5007 if (fnd == 0) 5008 error = ENXIO; 5009 } 5010 5011 gotone = 0; 5012 pf = (struct pnfsdsfile *)buf; 5013 NFSD_DEBUG(4, "nfsrv_dsgetsockmnt: mirrorcnt=%d err=%d\n", mirrorcnt, 5014 error); 5015 for (i = 0; i < mirrorcnt && error == 0; i++, pf++) { 5016 fhiszero = 0; 5017 sad = (struct sockaddr *)&pf->dsf_sin; 5018 sin = &pf->dsf_sin; 5019 dsdir = pf->dsf_dir; 5020 if (dsdir >= nfsrv_dsdirsize) { 5021 printf("nfsrv_dsgetsockmnt: dsdir=%d\n", dsdir); 5022 error = ENOATTR; 5023 } else if (nvpp != NULL && newnmp != NULL && 5024 nfsaddr2_match(sad, newnmp->nm_nam)) 5025 error = EEXIST; 5026 if (error == 0) { 5027 if (ippos != NULL && curnmp == NULL && 5028 sad->sa_family == AF_INET && 5029 sin->sin_addr.s_addr == 0) 5030 *ippos = i; 5031 if (NFSBCMP(&zerofh, &pf->dsf_fh, sizeof(zerofh)) == 0) 5032 fhiszero = 1; 5033 /* Use the socket address to find the mount point. */ 5034 fndds = NULL; 5035 NFSDDSLOCK(); 5036 /* Find a match for the IP address. */ 5037 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 5038 if (ds->nfsdev_nmp != NULL) { 5039 dvp = ds->nfsdev_dvp; 5040 nmp = VFSTONFS(dvp->v_mount); 5041 if (nmp != ds->nfsdev_nmp) 5042 printf("different2 nmp %p %p\n", 5043 nmp, ds->nfsdev_nmp); 5044 if (nfsaddr2_match(sad, nmp->nm_nam)) { 5045 fndds = ds; 5046 break; 5047 } 5048 } 5049 } 5050 if (fndds != NULL && newnmpp != NULL && 5051 newnmp == NULL) { 5052 /* Search for a place to make a mirror copy. */ 5053 TAILQ_FOREACH(tds, &nfsrv_devidhead, 5054 nfsdev_list) { 5055 if (tds->nfsdev_nmp != NULL && 5056 fndds != tds && 5057 ((tds->nfsdev_mdsisset == 0 && 5058 fndds->nfsdev_mdsisset == 0) || 5059 (tds->nfsdev_mdsisset != 0 && 5060 fndds->nfsdev_mdsisset != 0 && 5061 fsidcmp(&tds->nfsdev_mdsfsid, 5062 &mp->mnt_stat.f_fsid) == 0))) { 5063 *newnmpp = tds->nfsdev_nmp; 5064 break; 5065 } 5066 } 5067 if (tds != NULL) { 5068 /* 5069 * Move this entry to the end of the 5070 * list, so it won't be selected as 5071 * easily the next time. 5072 */ 5073 TAILQ_REMOVE(&nfsrv_devidhead, tds, 5074 nfsdev_list); 5075 TAILQ_INSERT_TAIL(&nfsrv_devidhead, tds, 5076 nfsdev_list); 5077 } 5078 } 5079 NFSDDSUNLOCK(); 5080 if (fndds != NULL) { 5081 dvp = fndds->nfsdev_dsdir[dsdir]; 5082 if (lktype != 0 || fhiszero != 0 || 5083 (nvpp != NULL && *nvpp == NULL)) { 5084 if (fhiszero != 0) 5085 error = vn_lock(dvp, 5086 LK_EXCLUSIVE); 5087 else if (lktype != 0) 5088 error = vn_lock(dvp, lktype); 5089 else 5090 error = vn_lock(dvp, LK_SHARED); 5091 /* 5092 * If the file handle is all 0's, try to 5093 * do a Lookup against the DS to acquire 5094 * it. 5095 * If dvpp == NULL or the Lookup fails, 5096 * unlock dvp after the call. 5097 */ 5098 if (error == 0 && (fhiszero != 0 || 5099 (nvpp != NULL && *nvpp == NULL))) { 5100 error = nfsrv_pnfslookupds(vp, 5101 dvp, pf, &nvp, p); 5102 if (error == 0) { 5103 if (fhiszero != 0) 5104 nfsrv_pnfssetfh( 5105 vp, pf, 5106 devid, 5107 fnamep, 5108 nvp, p); 5109 if (nvpp != NULL && 5110 *nvpp == NULL) { 5111 *nvpp = nvp; 5112 *dsdirp = dsdir; 5113 } else 5114 vput(nvp); 5115 } 5116 if (error != 0 || lktype == 0) 5117 NFSVOPUNLOCK(dvp); 5118 } 5119 } 5120 if (error == 0) { 5121 gotone++; 5122 NFSD_DEBUG(4, "gotone=%d\n", gotone); 5123 if (devid != NULL) { 5124 NFSBCOPY(fndds->nfsdev_deviceid, 5125 devid, NFSX_V4DEVICEID); 5126 devid += NFSX_V4DEVICEID; 5127 } 5128 if (dvpp != NULL) 5129 *tdvpp++ = dvp; 5130 if (fhp != NULL) 5131 NFSBCOPY(&pf->dsf_fh, fhp++, 5132 NFSX_MYFH); 5133 if (fnamep != NULL && gotone == 1) 5134 strlcpy(fnamep, 5135 pf->dsf_filename, 5136 sizeof(pf->dsf_filename)); 5137 } else 5138 NFSD_DEBUG(4, "nfsrv_dsgetsockmnt " 5139 "err=%d\n", error); 5140 } 5141 } 5142 } 5143 if (error == 0 && gotone == 0) 5144 error = ENOENT; 5145 5146 NFSD_DEBUG(4, "eo nfsrv_dsgetsockmnt: gotone=%d err=%d\n", gotone, 5147 error); 5148 if (error == 0) 5149 *mirrorcntp = gotone; 5150 else { 5151 if (gotone > 0 && dvpp != NULL) { 5152 /* 5153 * If the error didn't occur on the first one and 5154 * dvpp != NULL, the one(s) prior to the failure will 5155 * have locked dvp's that need to be unlocked. 5156 */ 5157 for (i = 0; i < gotone; i++) { 5158 NFSVOPUNLOCK(*dvpp); 5159 *dvpp++ = NULL; 5160 } 5161 } 5162 /* 5163 * If it found the vnode to be copied from before a failure, 5164 * it needs to be vput()'d. 5165 */ 5166 if (nvpp != NULL && *nvpp != NULL) { 5167 vput(*nvpp); 5168 *nvpp = NULL; 5169 } 5170 } 5171 return (error); 5172 } 5173 5174 /* 5175 * Set the extended attribute for the Change attribute. 5176 */ 5177 static int 5178 nfsrv_setextattr(struct vnode *vp, struct nfsvattr *nap, NFSPROC_T *p) 5179 { 5180 struct pnfsdsattr dsattr; 5181 int error; 5182 5183 ASSERT_VOP_ELOCKED(vp, "nfsrv_setextattr vp"); 5184 dsattr.dsa_filerev = nap->na_filerev; 5185 dsattr.dsa_size = nap->na_size; 5186 dsattr.dsa_atime = nap->na_atime; 5187 dsattr.dsa_mtime = nap->na_mtime; 5188 dsattr.dsa_bytes = nap->na_bytes; 5189 error = vn_extattr_set(vp, IO_NODELOCKED, EXTATTR_NAMESPACE_SYSTEM, 5190 "pnfsd.dsattr", sizeof(dsattr), (char *)&dsattr, p); 5191 if (error != 0) 5192 printf("pNFS: setextattr=%d\n", error); 5193 return (error); 5194 } 5195 5196 static int 5197 nfsrv_readdsrpc(fhandle_t *fhp, off_t off, int len, struct ucred *cred, 5198 NFSPROC_T *p, struct nfsmount *nmp, struct mbuf **mpp, struct mbuf **mpendp) 5199 { 5200 uint32_t *tl; 5201 struct nfsrv_descript *nd; 5202 nfsv4stateid_t st; 5203 struct mbuf *m, *m2; 5204 int error = 0, retlen, tlen, trimlen; 5205 5206 NFSD_DEBUG(4, "in nfsrv_readdsrpc\n"); 5207 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 5208 *mpp = NULL; 5209 /* 5210 * Use a stateid where other is an alternating 01010 pattern and 5211 * seqid is 0xffffffff. This value is not defined as special by 5212 * the RFC and is used by the FreeBSD NFS server to indicate an 5213 * MDS->DS proxy operation. 5214 */ 5215 st.other[0] = 0x55555555; 5216 st.other[1] = 0x55555555; 5217 st.other[2] = 0x55555555; 5218 st.seqid = 0xffffffff; 5219 nfscl_reqstart(nd, NFSPROC_READDS, nmp, (u_int8_t *)fhp, sizeof(*fhp), 5220 NULL, NULL, 0, 0); 5221 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 5222 NFSM_BUILD(tl, uint32_t *, NFSX_UNSIGNED * 3); 5223 txdr_hyper(off, tl); 5224 *(tl + 2) = txdr_unsigned(len); 5225 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred, 5226 NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 5227 if (error != 0) { 5228 free(nd, M_TEMP); 5229 return (error); 5230 } 5231 if (nd->nd_repstat == 0) { 5232 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); 5233 NFSM_STRSIZ(retlen, len); 5234 if (retlen > 0) { 5235 /* Trim off the pre-data XDR from the mbuf chain. */ 5236 m = nd->nd_mrep; 5237 while (m != NULL && m != nd->nd_md) { 5238 if (m->m_next == nd->nd_md) { 5239 m->m_next = NULL; 5240 m_freem(nd->nd_mrep); 5241 nd->nd_mrep = m = nd->nd_md; 5242 } else 5243 m = m->m_next; 5244 } 5245 if (m == NULL) { 5246 printf("nfsrv_readdsrpc: busted mbuf list\n"); 5247 error = ENOENT; 5248 goto nfsmout; 5249 } 5250 5251 /* 5252 * Now, adjust first mbuf so that any XDR before the 5253 * read data is skipped over. 5254 */ 5255 trimlen = nd->nd_dpos - mtod(m, char *); 5256 if (trimlen > 0) { 5257 m->m_len -= trimlen; 5258 NFSM_DATAP(m, trimlen); 5259 } 5260 5261 /* 5262 * Truncate the mbuf chain at retlen bytes of data, 5263 * plus XDR padding that brings the length up to a 5264 * multiple of 4. 5265 */ 5266 tlen = NFSM_RNDUP(retlen); 5267 do { 5268 if (m->m_len >= tlen) { 5269 m->m_len = tlen; 5270 tlen = 0; 5271 m2 = m->m_next; 5272 m->m_next = NULL; 5273 m_freem(m2); 5274 break; 5275 } 5276 tlen -= m->m_len; 5277 m = m->m_next; 5278 } while (m != NULL); 5279 if (tlen > 0) { 5280 printf("nfsrv_readdsrpc: busted mbuf list\n"); 5281 error = ENOENT; 5282 goto nfsmout; 5283 } 5284 *mpp = nd->nd_mrep; 5285 *mpendp = m; 5286 nd->nd_mrep = NULL; 5287 } 5288 } else 5289 error = nd->nd_repstat; 5290 nfsmout: 5291 /* If nd->nd_mrep is already NULL, this is a no-op. */ 5292 m_freem(nd->nd_mrep); 5293 free(nd, M_TEMP); 5294 NFSD_DEBUG(4, "nfsrv_readdsrpc error=%d\n", error); 5295 return (error); 5296 } 5297 5298 /* 5299 * Do a write RPC on a DS data file, using this structure for the arguments, 5300 * so that this function can be executed by a separate kernel process. 5301 */ 5302 struct nfsrvwritedsdorpc { 5303 int done; 5304 int inprog; 5305 struct task tsk; 5306 fhandle_t fh; 5307 off_t off; 5308 int len; 5309 struct nfsmount *nmp; 5310 struct ucred *cred; 5311 NFSPROC_T *p; 5312 struct mbuf *m; 5313 int err; 5314 }; 5315 5316 static int 5317 nfsrv_writedsdorpc(struct nfsmount *nmp, fhandle_t *fhp, off_t off, int len, 5318 struct nfsvattr *nap, struct mbuf *m, struct ucred *cred, NFSPROC_T *p) 5319 { 5320 uint32_t *tl; 5321 struct nfsrv_descript *nd; 5322 nfsattrbit_t attrbits; 5323 nfsv4stateid_t st; 5324 int commit, error, retlen; 5325 5326 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 5327 nfscl_reqstart(nd, NFSPROC_WRITE, nmp, (u_int8_t *)fhp, 5328 sizeof(fhandle_t), NULL, NULL, 0, 0); 5329 5330 /* 5331 * Use a stateid where other is an alternating 01010 pattern and 5332 * seqid is 0xffffffff. This value is not defined as special by 5333 * the RFC and is used by the FreeBSD NFS server to indicate an 5334 * MDS->DS proxy operation. 5335 */ 5336 st.other[0] = 0x55555555; 5337 st.other[1] = 0x55555555; 5338 st.other[2] = 0x55555555; 5339 st.seqid = 0xffffffff; 5340 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 5341 NFSM_BUILD(tl, u_int32_t *, NFSX_HYPER + 2 * NFSX_UNSIGNED); 5342 txdr_hyper(off, tl); 5343 tl += 2; 5344 /* 5345 * Do all writes FileSync, since the server doesn't hold onto dirty 5346 * buffers. Since clients should be accessing the DS servers directly 5347 * using the pNFS layouts, this just needs to work correctly as a 5348 * fallback. 5349 */ 5350 *tl++ = txdr_unsigned(NFSWRITE_FILESYNC); 5351 *tl = txdr_unsigned(len); 5352 NFSD_DEBUG(4, "nfsrv_writedsdorpc: len=%d\n", len); 5353 5354 /* Put data in mbuf chain. */ 5355 nd->nd_mb->m_next = m; 5356 5357 /* Set nd_mb and nd_bpos to end of data. */ 5358 while (m->m_next != NULL) 5359 m = m->m_next; 5360 nd->nd_mb = m; 5361 nfsm_set(nd, m->m_len); 5362 NFSD_DEBUG(4, "nfsrv_writedsdorpc: lastmb len=%d\n", m->m_len); 5363 5364 /* Do a Getattr for the attributes that change upon writing. */ 5365 NFSZERO_ATTRBIT(&attrbits); 5366 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SIZE); 5367 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_CHANGE); 5368 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEACCESS); 5369 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEMODIFY); 5370 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SPACEUSED); 5371 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 5372 *tl = txdr_unsigned(NFSV4OP_GETATTR); 5373 (void) nfsrv_putattrbit(nd, &attrbits); 5374 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, 5375 cred, NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 5376 if (error != 0) { 5377 free(nd, M_TEMP); 5378 return (error); 5379 } 5380 NFSD_DEBUG(4, "nfsrv_writedsdorpc: aft writerpc=%d\n", nd->nd_repstat); 5381 /* Get rid of weak cache consistency data for now. */ 5382 if ((nd->nd_flag & (ND_NOMOREDATA | ND_NFSV4 | ND_V4WCCATTR)) == 5383 (ND_NFSV4 | ND_V4WCCATTR)) { 5384 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, NULL, NULL, 5385 NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 5386 NFSD_DEBUG(4, "nfsrv_writedsdorpc: wcc attr=%d\n", error); 5387 if (error != 0) 5388 goto nfsmout; 5389 /* 5390 * Get rid of Op# and status for next op. 5391 */ 5392 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 5393 if (*++tl != 0) 5394 nd->nd_flag |= ND_NOMOREDATA; 5395 } 5396 if (nd->nd_repstat == 0) { 5397 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED + NFSX_VERF); 5398 retlen = fxdr_unsigned(int, *tl++); 5399 commit = fxdr_unsigned(int, *tl); 5400 if (commit != NFSWRITE_FILESYNC) 5401 error = NFSERR_IO; 5402 NFSD_DEBUG(4, "nfsrv_writedsdorpc:retlen=%d commit=%d err=%d\n", 5403 retlen, commit, error); 5404 } else 5405 error = nd->nd_repstat; 5406 /* We have no use for the Write Verifier since we use FileSync. */ 5407 5408 /* 5409 * Get the Change, Size, Access Time and Modify Time attributes and set 5410 * on the Metadata file, so its attributes will be what the file's 5411 * would be if it had been written. 5412 */ 5413 if (error == 0) { 5414 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 5415 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, NULL, NULL, 5416 NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 5417 } 5418 NFSD_DEBUG(4, "nfsrv_writedsdorpc: aft loadattr=%d\n", error); 5419 nfsmout: 5420 m_freem(nd->nd_mrep); 5421 free(nd, M_TEMP); 5422 NFSD_DEBUG(4, "nfsrv_writedsdorpc error=%d\n", error); 5423 return (error); 5424 } 5425 5426 /* 5427 * Start up the thread that will execute nfsrv_writedsdorpc(). 5428 */ 5429 static void 5430 start_writedsdorpc(void *arg, int pending) 5431 { 5432 struct nfsrvwritedsdorpc *drpc; 5433 5434 drpc = (struct nfsrvwritedsdorpc *)arg; 5435 drpc->err = nfsrv_writedsdorpc(drpc->nmp, &drpc->fh, drpc->off, 5436 drpc->len, NULL, drpc->m, drpc->cred, drpc->p); 5437 drpc->done = 1; 5438 NFSD_DEBUG(4, "start_writedsdorpc: err=%d\n", drpc->err); 5439 } 5440 5441 static int 5442 nfsrv_writedsrpc(fhandle_t *fhp, off_t off, int len, struct ucred *cred, 5443 NFSPROC_T *p, struct vnode *vp, struct nfsmount **nmpp, int mirrorcnt, 5444 struct mbuf **mpp, char *cp, int *failposp) 5445 { 5446 struct nfsrvwritedsdorpc *drpc, *tdrpc = NULL; 5447 struct nfsvattr na; 5448 struct mbuf *m; 5449 int error, i, offs, ret, timo; 5450 5451 NFSD_DEBUG(4, "in nfsrv_writedsrpc\n"); 5452 KASSERT(*mpp != NULL, ("nfsrv_writedsrpc: NULL mbuf chain")); 5453 drpc = NULL; 5454 if (mirrorcnt > 1) 5455 tdrpc = drpc = malloc(sizeof(*drpc) * (mirrorcnt - 1), M_TEMP, 5456 M_WAITOK); 5457 5458 /* Calculate offset in mbuf chain that data starts. */ 5459 offs = cp - mtod(*mpp, char *); 5460 NFSD_DEBUG(4, "nfsrv_writedsrpc: mcopy offs=%d len=%d\n", offs, len); 5461 5462 /* 5463 * Do the write RPC for every DS, using a separate kernel process 5464 * for every DS except the last one. 5465 */ 5466 error = 0; 5467 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5468 tdrpc->done = 0; 5469 NFSBCOPY(fhp, &tdrpc->fh, sizeof(*fhp)); 5470 tdrpc->off = off; 5471 tdrpc->len = len; 5472 tdrpc->nmp = *nmpp; 5473 tdrpc->cred = cred; 5474 tdrpc->p = p; 5475 tdrpc->inprog = 0; 5476 tdrpc->err = 0; 5477 tdrpc->m = m_copym(*mpp, offs, NFSM_RNDUP(len), M_WAITOK); 5478 ret = EIO; 5479 if (nfs_pnfsiothreads != 0) { 5480 ret = nfs_pnfsio(start_writedsdorpc, tdrpc); 5481 NFSD_DEBUG(4, "nfsrv_writedsrpc: nfs_pnfsio=%d\n", 5482 ret); 5483 } 5484 if (ret != 0) { 5485 ret = nfsrv_writedsdorpc(*nmpp, fhp, off, len, NULL, 5486 tdrpc->m, cred, p); 5487 if (nfsds_failerr(ret) && *failposp == -1) 5488 *failposp = i; 5489 else if (error == 0 && ret != 0) 5490 error = ret; 5491 } 5492 nmpp++; 5493 fhp++; 5494 } 5495 m = m_copym(*mpp, offs, NFSM_RNDUP(len), M_WAITOK); 5496 ret = nfsrv_writedsdorpc(*nmpp, fhp, off, len, &na, m, cred, p); 5497 if (nfsds_failerr(ret) && *failposp == -1 && mirrorcnt > 1) 5498 *failposp = mirrorcnt - 1; 5499 else if (error == 0 && ret != 0) 5500 error = ret; 5501 if (error == 0) 5502 error = nfsrv_setextattr(vp, &na, p); 5503 NFSD_DEBUG(4, "nfsrv_writedsrpc: aft setextat=%d\n", error); 5504 tdrpc = drpc; 5505 timo = hz / 50; /* Wait for 20msec. */ 5506 if (timo < 1) 5507 timo = 1; 5508 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5509 /* Wait for RPCs on separate threads to complete. */ 5510 while (tdrpc->inprog != 0 && tdrpc->done == 0) 5511 tsleep(&tdrpc->tsk, PVFS, "srvwrds", timo); 5512 if (nfsds_failerr(tdrpc->err) && *failposp == -1) 5513 *failposp = i; 5514 else if (error == 0 && tdrpc->err != 0) 5515 error = tdrpc->err; 5516 } 5517 free(drpc, M_TEMP); 5518 return (error); 5519 } 5520 5521 /* 5522 * Do a allocate RPC on a DS data file, using this structure for the arguments, 5523 * so that this function can be executed by a separate kernel process. 5524 */ 5525 struct nfsrvallocatedsdorpc { 5526 int done; 5527 int inprog; 5528 struct task tsk; 5529 fhandle_t fh; 5530 off_t off; 5531 off_t len; 5532 struct nfsmount *nmp; 5533 struct ucred *cred; 5534 NFSPROC_T *p; 5535 int err; 5536 }; 5537 5538 static int 5539 nfsrv_allocatedsdorpc(struct nfsmount *nmp, fhandle_t *fhp, off_t off, 5540 off_t len, struct nfsvattr *nap, struct ucred *cred, NFSPROC_T *p) 5541 { 5542 uint32_t *tl; 5543 struct nfsrv_descript *nd; 5544 nfsattrbit_t attrbits; 5545 nfsv4stateid_t st; 5546 int error; 5547 5548 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 5549 nfscl_reqstart(nd, NFSPROC_ALLOCATE, nmp, (u_int8_t *)fhp, 5550 sizeof(fhandle_t), NULL, NULL, 0, 0); 5551 5552 /* 5553 * Use a stateid where other is an alternating 01010 pattern and 5554 * seqid is 0xffffffff. This value is not defined as special by 5555 * the RFC and is used by the FreeBSD NFS server to indicate an 5556 * MDS->DS proxy operation. 5557 */ 5558 st.other[0] = 0x55555555; 5559 st.other[1] = 0x55555555; 5560 st.other[2] = 0x55555555; 5561 st.seqid = 0xffffffff; 5562 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 5563 NFSM_BUILD(tl, uint32_t *, 2 * NFSX_HYPER + NFSX_UNSIGNED); 5564 txdr_hyper(off, tl); tl += 2; 5565 txdr_hyper(len, tl); tl += 2; 5566 NFSD_DEBUG(4, "nfsrv_allocatedsdorpc: len=%jd\n", (intmax_t)len); 5567 5568 *tl = txdr_unsigned(NFSV4OP_GETATTR); 5569 NFSGETATTR_ATTRBIT(&attrbits); 5570 nfsrv_putattrbit(nd, &attrbits); 5571 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, 5572 cred, NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 5573 if (error != 0) { 5574 free(nd, M_TEMP); 5575 return (error); 5576 } 5577 NFSD_DEBUG(4, "nfsrv_allocatedsdorpc: aft allocaterpc=%d\n", 5578 nd->nd_repstat); 5579 if (nd->nd_repstat == 0) { 5580 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 5581 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, NULL, NULL, 5582 NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 5583 } else 5584 error = nd->nd_repstat; 5585 NFSD_DEBUG(4, "nfsrv_allocatedsdorpc: aft loadattr=%d\n", error); 5586 nfsmout: 5587 m_freem(nd->nd_mrep); 5588 free(nd, M_TEMP); 5589 NFSD_DEBUG(4, "nfsrv_allocatedsdorpc error=%d\n", error); 5590 return (error); 5591 } 5592 5593 /* 5594 * Start up the thread that will execute nfsrv_allocatedsdorpc(). 5595 */ 5596 static void 5597 start_allocatedsdorpc(void *arg, int pending) 5598 { 5599 struct nfsrvallocatedsdorpc *drpc; 5600 5601 drpc = (struct nfsrvallocatedsdorpc *)arg; 5602 drpc->err = nfsrv_allocatedsdorpc(drpc->nmp, &drpc->fh, drpc->off, 5603 drpc->len, NULL, drpc->cred, drpc->p); 5604 drpc->done = 1; 5605 NFSD_DEBUG(4, "start_allocatedsdorpc: err=%d\n", drpc->err); 5606 } 5607 5608 static int 5609 nfsrv_allocatedsrpc(fhandle_t *fhp, off_t off, off_t len, struct ucred *cred, 5610 NFSPROC_T *p, struct vnode *vp, struct nfsmount **nmpp, int mirrorcnt, 5611 int *failposp) 5612 { 5613 struct nfsrvallocatedsdorpc *drpc, *tdrpc = NULL; 5614 struct nfsvattr na; 5615 int error, i, ret, timo; 5616 5617 NFSD_DEBUG(4, "in nfsrv_allocatedsrpc\n"); 5618 drpc = NULL; 5619 if (mirrorcnt > 1) 5620 tdrpc = drpc = malloc(sizeof(*drpc) * (mirrorcnt - 1), M_TEMP, 5621 M_WAITOK); 5622 5623 /* 5624 * Do the allocate RPC for every DS, using a separate kernel process 5625 * for every DS except the last one. 5626 */ 5627 error = 0; 5628 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5629 tdrpc->done = 0; 5630 NFSBCOPY(fhp, &tdrpc->fh, sizeof(*fhp)); 5631 tdrpc->off = off; 5632 tdrpc->len = len; 5633 tdrpc->nmp = *nmpp; 5634 tdrpc->cred = cred; 5635 tdrpc->p = p; 5636 tdrpc->inprog = 0; 5637 tdrpc->err = 0; 5638 ret = EIO; 5639 if (nfs_pnfsiothreads != 0) { 5640 ret = nfs_pnfsio(start_allocatedsdorpc, tdrpc); 5641 NFSD_DEBUG(4, "nfsrv_allocatedsrpc: nfs_pnfsio=%d\n", 5642 ret); 5643 } 5644 if (ret != 0) { 5645 ret = nfsrv_allocatedsdorpc(*nmpp, fhp, off, len, NULL, 5646 cred, p); 5647 if (nfsds_failerr(ret) && *failposp == -1) 5648 *failposp = i; 5649 else if (error == 0 && ret != 0) 5650 error = ret; 5651 } 5652 nmpp++; 5653 fhp++; 5654 } 5655 ret = nfsrv_allocatedsdorpc(*nmpp, fhp, off, len, &na, cred, p); 5656 if (nfsds_failerr(ret) && *failposp == -1 && mirrorcnt > 1) 5657 *failposp = mirrorcnt - 1; 5658 else if (error == 0 && ret != 0) 5659 error = ret; 5660 if (error == 0) 5661 error = nfsrv_setextattr(vp, &na, p); 5662 NFSD_DEBUG(4, "nfsrv_allocatedsrpc: aft setextat=%d\n", error); 5663 tdrpc = drpc; 5664 timo = hz / 50; /* Wait for 20msec. */ 5665 if (timo < 1) 5666 timo = 1; 5667 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5668 /* Wait for RPCs on separate threads to complete. */ 5669 while (tdrpc->inprog != 0 && tdrpc->done == 0) 5670 tsleep(&tdrpc->tsk, PVFS, "srvalds", timo); 5671 if (nfsds_failerr(tdrpc->err) && *failposp == -1) 5672 *failposp = i; 5673 else if (error == 0 && tdrpc->err != 0) 5674 error = tdrpc->err; 5675 } 5676 free(drpc, M_TEMP); 5677 return (error); 5678 } 5679 5680 /* 5681 * Do a deallocate RPC on a DS data file, using this structure for the 5682 * arguments, so that this function can be executed by a separate kernel 5683 * process. 5684 */ 5685 struct nfsrvdeallocatedsdorpc { 5686 int done; 5687 int inprog; 5688 struct task tsk; 5689 fhandle_t fh; 5690 off_t off; 5691 off_t len; 5692 struct nfsmount *nmp; 5693 struct ucred *cred; 5694 NFSPROC_T *p; 5695 int err; 5696 }; 5697 5698 static int 5699 nfsrv_deallocatedsdorpc(struct nfsmount *nmp, fhandle_t *fhp, off_t off, 5700 off_t len, struct nfsvattr *nap, struct ucred *cred, NFSPROC_T *p) 5701 { 5702 uint32_t *tl; 5703 struct nfsrv_descript *nd; 5704 nfsattrbit_t attrbits; 5705 nfsv4stateid_t st; 5706 int error; 5707 5708 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 5709 nfscl_reqstart(nd, NFSPROC_DEALLOCATE, nmp, (u_int8_t *)fhp, 5710 sizeof(fhandle_t), NULL, NULL, 0, 0); 5711 5712 /* 5713 * Use a stateid where other is an alternating 01010 pattern and 5714 * seqid is 0xffffffff. This value is not defined as special by 5715 * the RFC and is used by the FreeBSD NFS server to indicate an 5716 * MDS->DS proxy operation. 5717 */ 5718 st.other[0] = 0x55555555; 5719 st.other[1] = 0x55555555; 5720 st.other[2] = 0x55555555; 5721 st.seqid = 0xffffffff; 5722 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 5723 NFSM_BUILD(tl, uint32_t *, 2 * NFSX_HYPER + NFSX_UNSIGNED); 5724 txdr_hyper(off, tl); tl += 2; 5725 txdr_hyper(len, tl); tl += 2; 5726 NFSD_DEBUG(4, "nfsrv_deallocatedsdorpc: len=%jd\n", (intmax_t)len); 5727 5728 /* Do a Getattr for the attributes that change upon writing. */ 5729 NFSZERO_ATTRBIT(&attrbits); 5730 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SIZE); 5731 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_CHANGE); 5732 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEACCESS); 5733 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEMODIFY); 5734 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SPACEUSED); 5735 *tl = txdr_unsigned(NFSV4OP_GETATTR); 5736 nfsrv_putattrbit(nd, &attrbits); 5737 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, 5738 cred, NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 5739 if (error != 0) { 5740 free(nd, M_TEMP); 5741 return (error); 5742 } 5743 NFSD_DEBUG(4, "nfsrv_deallocatedsdorpc: aft deallocaterpc=%d\n", 5744 nd->nd_repstat); 5745 /* Get rid of weak cache consistency data for now. */ 5746 if ((nd->nd_flag & (ND_NOMOREDATA | ND_NFSV4 | ND_V4WCCATTR)) == 5747 (ND_NFSV4 | ND_V4WCCATTR)) { 5748 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, NULL, NULL, 5749 NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 5750 NFSD_DEBUG(4, "nfsrv_deallocatedsdorpc: wcc attr=%d\n", error); 5751 if (error != 0) 5752 goto nfsmout; 5753 /* 5754 * Get rid of Op# and status for next op. 5755 */ 5756 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 5757 if (*++tl != 0) 5758 nd->nd_flag |= ND_NOMOREDATA; 5759 } 5760 if (nd->nd_repstat == 0) { 5761 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 5762 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, NULL, NULL, 5763 NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 5764 } else 5765 error = nd->nd_repstat; 5766 NFSD_DEBUG(4, "nfsrv_deallocatedsdorpc: aft loadattr=%d\n", error); 5767 nfsmout: 5768 m_freem(nd->nd_mrep); 5769 free(nd, M_TEMP); 5770 NFSD_DEBUG(4, "nfsrv_deallocatedsdorpc error=%d\n", error); 5771 return (error); 5772 } 5773 5774 /* 5775 * Start up the thread that will execute nfsrv_deallocatedsdorpc(). 5776 */ 5777 static void 5778 start_deallocatedsdorpc(void *arg, int pending) 5779 { 5780 struct nfsrvdeallocatedsdorpc *drpc; 5781 5782 drpc = (struct nfsrvdeallocatedsdorpc *)arg; 5783 drpc->err = nfsrv_deallocatedsdorpc(drpc->nmp, &drpc->fh, drpc->off, 5784 drpc->len, NULL, drpc->cred, drpc->p); 5785 drpc->done = 1; 5786 NFSD_DEBUG(4, "start_deallocatedsdorpc: err=%d\n", drpc->err); 5787 } 5788 5789 static int 5790 nfsrv_deallocatedsrpc(fhandle_t *fhp, off_t off, off_t len, struct ucred *cred, 5791 NFSPROC_T *p, struct vnode *vp, struct nfsmount **nmpp, int mirrorcnt, 5792 int *failposp) 5793 { 5794 struct nfsrvdeallocatedsdorpc *drpc, *tdrpc = NULL; 5795 struct nfsvattr na; 5796 int error, i, ret, timo; 5797 5798 NFSD_DEBUG(4, "in nfsrv_deallocatedsrpc\n"); 5799 drpc = NULL; 5800 if (mirrorcnt > 1) 5801 tdrpc = drpc = malloc(sizeof(*drpc) * (mirrorcnt - 1), M_TEMP, 5802 M_WAITOK); 5803 5804 /* 5805 * Do the deallocate RPC for every DS, using a separate kernel process 5806 * for every DS except the last one. 5807 */ 5808 error = 0; 5809 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5810 tdrpc->done = 0; 5811 NFSBCOPY(fhp, &tdrpc->fh, sizeof(*fhp)); 5812 tdrpc->off = off; 5813 tdrpc->len = len; 5814 tdrpc->nmp = *nmpp; 5815 tdrpc->cred = cred; 5816 tdrpc->p = p; 5817 tdrpc->inprog = 0; 5818 tdrpc->err = 0; 5819 ret = EIO; 5820 if (nfs_pnfsiothreads != 0) { 5821 ret = nfs_pnfsio(start_deallocatedsdorpc, tdrpc); 5822 NFSD_DEBUG(4, "nfsrv_deallocatedsrpc: nfs_pnfsio=%d\n", 5823 ret); 5824 } 5825 if (ret != 0) { 5826 ret = nfsrv_deallocatedsdorpc(*nmpp, fhp, off, len, 5827 NULL, cred, p); 5828 if (nfsds_failerr(ret) && *failposp == -1) 5829 *failposp = i; 5830 else if (error == 0 && ret != 0) 5831 error = ret; 5832 } 5833 nmpp++; 5834 fhp++; 5835 } 5836 ret = nfsrv_deallocatedsdorpc(*nmpp, fhp, off, len, &na, cred, p); 5837 if (nfsds_failerr(ret) && *failposp == -1 && mirrorcnt > 1) 5838 *failposp = mirrorcnt - 1; 5839 else if (error == 0 && ret != 0) 5840 error = ret; 5841 if (error == 0) 5842 error = nfsrv_setextattr(vp, &na, p); 5843 NFSD_DEBUG(4, "nfsrv_deallocatedsrpc: aft setextat=%d\n", error); 5844 tdrpc = drpc; 5845 timo = hz / 50; /* Wait for 20msec. */ 5846 if (timo < 1) 5847 timo = 1; 5848 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5849 /* Wait for RPCs on separate threads to complete. */ 5850 while (tdrpc->inprog != 0 && tdrpc->done == 0) 5851 tsleep(&tdrpc->tsk, PVFS, "srvalds", timo); 5852 if (nfsds_failerr(tdrpc->err) && *failposp == -1) 5853 *failposp = i; 5854 else if (error == 0 && tdrpc->err != 0) 5855 error = tdrpc->err; 5856 } 5857 free(drpc, M_TEMP); 5858 return (error); 5859 } 5860 5861 static int 5862 nfsrv_setattrdsdorpc(fhandle_t *fhp, struct ucred *cred, NFSPROC_T *p, 5863 struct vnode *vp, struct nfsmount *nmp, struct nfsvattr *nap, 5864 struct nfsvattr *dsnap) 5865 { 5866 uint32_t *tl; 5867 struct nfsrv_descript *nd; 5868 nfsv4stateid_t st; 5869 nfsattrbit_t attrbits; 5870 int error; 5871 5872 NFSD_DEBUG(4, "in nfsrv_setattrdsdorpc\n"); 5873 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 5874 /* 5875 * Use a stateid where other is an alternating 01010 pattern and 5876 * seqid is 0xffffffff. This value is not defined as special by 5877 * the RFC and is used by the FreeBSD NFS server to indicate an 5878 * MDS->DS proxy operation. 5879 */ 5880 st.other[0] = 0x55555555; 5881 st.other[1] = 0x55555555; 5882 st.other[2] = 0x55555555; 5883 st.seqid = 0xffffffff; 5884 nfscl_reqstart(nd, NFSPROC_SETATTR, nmp, (u_int8_t *)fhp, sizeof(*fhp), 5885 NULL, NULL, 0, 0); 5886 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 5887 nfscl_fillsattr(nd, &nap->na_vattr, vp, NFSSATTR_FULL, 0); 5888 5889 /* Do a Getattr for the attributes that change due to writing. */ 5890 NFSZERO_ATTRBIT(&attrbits); 5891 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SIZE); 5892 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_CHANGE); 5893 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEACCESS); 5894 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEMODIFY); 5895 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SPACEUSED); 5896 NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED); 5897 *tl = txdr_unsigned(NFSV4OP_GETATTR); 5898 (void) nfsrv_putattrbit(nd, &attrbits); 5899 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred, 5900 NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 5901 if (error != 0) { 5902 free(nd, M_TEMP); 5903 return (error); 5904 } 5905 NFSD_DEBUG(4, "nfsrv_setattrdsdorpc: aft setattrrpc=%d\n", 5906 nd->nd_repstat); 5907 /* Get rid of weak cache consistency data for now. */ 5908 if ((nd->nd_flag & (ND_NOMOREDATA | ND_NFSV4 | ND_V4WCCATTR)) == 5909 (ND_NFSV4 | ND_V4WCCATTR)) { 5910 error = nfsv4_loadattr(nd, NULL, dsnap, NULL, NULL, 0, NULL, 5911 NULL, NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 5912 NFSD_DEBUG(4, "nfsrv_setattrdsdorpc: wcc attr=%d\n", error); 5913 if (error != 0) 5914 goto nfsmout; 5915 /* 5916 * Get rid of Op# and status for next op. 5917 */ 5918 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 5919 if (*++tl != 0) 5920 nd->nd_flag |= ND_NOMOREDATA; 5921 } 5922 error = nfsrv_getattrbits(nd, &attrbits, NULL, NULL); 5923 if (error != 0) 5924 goto nfsmout; 5925 if (nd->nd_repstat != 0) 5926 error = nd->nd_repstat; 5927 /* 5928 * Get the Change, Size, Access Time and Modify Time attributes and set 5929 * on the Metadata file, so its attributes will be what the file's 5930 * would be if it had been written. 5931 */ 5932 if (error == 0) { 5933 NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED); 5934 error = nfsv4_loadattr(nd, NULL, dsnap, NULL, NULL, 0, NULL, 5935 NULL, NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); 5936 } 5937 NFSD_DEBUG(4, "nfsrv_setattrdsdorpc: aft setattr loadattr=%d\n", error); 5938 nfsmout: 5939 m_freem(nd->nd_mrep); 5940 free(nd, M_TEMP); 5941 NFSD_DEBUG(4, "nfsrv_setattrdsdorpc error=%d\n", error); 5942 return (error); 5943 } 5944 5945 struct nfsrvsetattrdsdorpc { 5946 int done; 5947 int inprog; 5948 struct task tsk; 5949 fhandle_t fh; 5950 struct nfsmount *nmp; 5951 struct vnode *vp; 5952 struct ucred *cred; 5953 NFSPROC_T *p; 5954 struct nfsvattr na; 5955 struct nfsvattr dsna; 5956 int err; 5957 }; 5958 5959 /* 5960 * Start up the thread that will execute nfsrv_setattrdsdorpc(). 5961 */ 5962 static void 5963 start_setattrdsdorpc(void *arg, int pending) 5964 { 5965 struct nfsrvsetattrdsdorpc *drpc; 5966 5967 drpc = (struct nfsrvsetattrdsdorpc *)arg; 5968 drpc->err = nfsrv_setattrdsdorpc(&drpc->fh, drpc->cred, drpc->p, 5969 drpc->vp, drpc->nmp, &drpc->na, &drpc->dsna); 5970 drpc->done = 1; 5971 } 5972 5973 static int 5974 nfsrv_setattrdsrpc(fhandle_t *fhp, struct ucred *cred, NFSPROC_T *p, 5975 struct vnode *vp, struct nfsmount **nmpp, int mirrorcnt, 5976 struct nfsvattr *nap, int *failposp) 5977 { 5978 struct nfsrvsetattrdsdorpc *drpc, *tdrpc = NULL; 5979 struct nfsvattr na; 5980 int error, i, ret, timo; 5981 5982 NFSD_DEBUG(4, "in nfsrv_setattrdsrpc\n"); 5983 drpc = NULL; 5984 if (mirrorcnt > 1) 5985 tdrpc = drpc = malloc(sizeof(*drpc) * (mirrorcnt - 1), M_TEMP, 5986 M_WAITOK); 5987 5988 /* 5989 * Do the setattr RPC for every DS, using a separate kernel process 5990 * for every DS except the last one. 5991 */ 5992 error = 0; 5993 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 5994 tdrpc->done = 0; 5995 tdrpc->inprog = 0; 5996 NFSBCOPY(fhp, &tdrpc->fh, sizeof(*fhp)); 5997 tdrpc->nmp = *nmpp; 5998 tdrpc->vp = vp; 5999 tdrpc->cred = cred; 6000 tdrpc->p = p; 6001 tdrpc->na = *nap; 6002 tdrpc->err = 0; 6003 ret = EIO; 6004 if (nfs_pnfsiothreads != 0) { 6005 ret = nfs_pnfsio(start_setattrdsdorpc, tdrpc); 6006 NFSD_DEBUG(4, "nfsrv_setattrdsrpc: nfs_pnfsio=%d\n", 6007 ret); 6008 } 6009 if (ret != 0) { 6010 ret = nfsrv_setattrdsdorpc(fhp, cred, p, vp, *nmpp, nap, 6011 &na); 6012 if (nfsds_failerr(ret) && *failposp == -1) 6013 *failposp = i; 6014 else if (error == 0 && ret != 0) 6015 error = ret; 6016 } 6017 nmpp++; 6018 fhp++; 6019 } 6020 ret = nfsrv_setattrdsdorpc(fhp, cred, p, vp, *nmpp, nap, &na); 6021 if (nfsds_failerr(ret) && *failposp == -1 && mirrorcnt > 1) 6022 *failposp = mirrorcnt - 1; 6023 else if (error == 0 && ret != 0) 6024 error = ret; 6025 if (error == 0) 6026 error = nfsrv_setextattr(vp, &na, p); 6027 NFSD_DEBUG(4, "nfsrv_setattrdsrpc: aft setextat=%d\n", error); 6028 tdrpc = drpc; 6029 timo = hz / 50; /* Wait for 20msec. */ 6030 if (timo < 1) 6031 timo = 1; 6032 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 6033 /* Wait for RPCs on separate threads to complete. */ 6034 while (tdrpc->inprog != 0 && tdrpc->done == 0) 6035 tsleep(&tdrpc->tsk, PVFS, "srvsads", timo); 6036 if (nfsds_failerr(tdrpc->err) && *failposp == -1) 6037 *failposp = i; 6038 else if (error == 0 && tdrpc->err != 0) 6039 error = tdrpc->err; 6040 } 6041 free(drpc, M_TEMP); 6042 return (error); 6043 } 6044 6045 /* 6046 * Do a Setattr of an NFSv4 ACL on the DS file. 6047 */ 6048 static int 6049 nfsrv_setacldsdorpc(fhandle_t *fhp, struct ucred *cred, NFSPROC_T *p, 6050 struct vnode *vp, struct nfsmount *nmp, struct acl *aclp) 6051 { 6052 struct nfsrv_descript *nd; 6053 nfsv4stateid_t st; 6054 nfsattrbit_t attrbits; 6055 int error; 6056 6057 NFSD_DEBUG(4, "in nfsrv_setacldsdorpc\n"); 6058 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 6059 /* 6060 * Use a stateid where other is an alternating 01010 pattern and 6061 * seqid is 0xffffffff. This value is not defined as special by 6062 * the RFC and is used by the FreeBSD NFS server to indicate an 6063 * MDS->DS proxy operation. 6064 */ 6065 st.other[0] = 0x55555555; 6066 st.other[1] = 0x55555555; 6067 st.other[2] = 0x55555555; 6068 st.seqid = 0xffffffff; 6069 nfscl_reqstart(nd, NFSPROC_SETACL, nmp, (u_int8_t *)fhp, sizeof(*fhp), 6070 NULL, NULL, 0, 0); 6071 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 6072 NFSZERO_ATTRBIT(&attrbits); 6073 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_ACL); 6074 /* 6075 * The "vp" argument to nfsv4_fillattr() is only used for vnode_type(), 6076 * so passing in the metadata "vp" will be ok, since it is of 6077 * the same type (VREG). 6078 */ 6079 nfsv4_fillattr(nd, NULL, vp, aclp, NULL, NULL, 0, &attrbits, NULL, 6080 NULL, 0, 0, 0, 0, 0, NULL); 6081 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred, 6082 NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 6083 if (error != 0) { 6084 free(nd, M_TEMP); 6085 return (error); 6086 } 6087 NFSD_DEBUG(4, "nfsrv_setacldsdorpc: aft setaclrpc=%d\n", 6088 nd->nd_repstat); 6089 error = nd->nd_repstat; 6090 m_freem(nd->nd_mrep); 6091 free(nd, M_TEMP); 6092 return (error); 6093 } 6094 6095 struct nfsrvsetacldsdorpc { 6096 int done; 6097 int inprog; 6098 struct task tsk; 6099 fhandle_t fh; 6100 struct nfsmount *nmp; 6101 struct vnode *vp; 6102 struct ucred *cred; 6103 NFSPROC_T *p; 6104 struct acl *aclp; 6105 int err; 6106 }; 6107 6108 /* 6109 * Start up the thread that will execute nfsrv_setacldsdorpc(). 6110 */ 6111 static void 6112 start_setacldsdorpc(void *arg, int pending) 6113 { 6114 struct nfsrvsetacldsdorpc *drpc; 6115 6116 drpc = (struct nfsrvsetacldsdorpc *)arg; 6117 drpc->err = nfsrv_setacldsdorpc(&drpc->fh, drpc->cred, drpc->p, 6118 drpc->vp, drpc->nmp, drpc->aclp); 6119 drpc->done = 1; 6120 } 6121 6122 static int 6123 nfsrv_setacldsrpc(fhandle_t *fhp, struct ucred *cred, NFSPROC_T *p, 6124 struct vnode *vp, struct nfsmount **nmpp, int mirrorcnt, struct acl *aclp, 6125 int *failposp) 6126 { 6127 struct nfsrvsetacldsdorpc *drpc, *tdrpc = NULL; 6128 int error, i, ret, timo; 6129 6130 NFSD_DEBUG(4, "in nfsrv_setacldsrpc\n"); 6131 drpc = NULL; 6132 if (mirrorcnt > 1) 6133 tdrpc = drpc = malloc(sizeof(*drpc) * (mirrorcnt - 1), M_TEMP, 6134 M_WAITOK); 6135 6136 /* 6137 * Do the setattr RPC for every DS, using a separate kernel process 6138 * for every DS except the last one. 6139 */ 6140 error = 0; 6141 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 6142 tdrpc->done = 0; 6143 tdrpc->inprog = 0; 6144 NFSBCOPY(fhp, &tdrpc->fh, sizeof(*fhp)); 6145 tdrpc->nmp = *nmpp; 6146 tdrpc->vp = vp; 6147 tdrpc->cred = cred; 6148 tdrpc->p = p; 6149 tdrpc->aclp = aclp; 6150 tdrpc->err = 0; 6151 ret = EIO; 6152 if (nfs_pnfsiothreads != 0) { 6153 ret = nfs_pnfsio(start_setacldsdorpc, tdrpc); 6154 NFSD_DEBUG(4, "nfsrv_setacldsrpc: nfs_pnfsio=%d\n", 6155 ret); 6156 } 6157 if (ret != 0) { 6158 ret = nfsrv_setacldsdorpc(fhp, cred, p, vp, *nmpp, 6159 aclp); 6160 if (nfsds_failerr(ret) && *failposp == -1) 6161 *failposp = i; 6162 else if (error == 0 && ret != 0) 6163 error = ret; 6164 } 6165 nmpp++; 6166 fhp++; 6167 } 6168 ret = nfsrv_setacldsdorpc(fhp, cred, p, vp, *nmpp, aclp); 6169 if (nfsds_failerr(ret) && *failposp == -1 && mirrorcnt > 1) 6170 *failposp = mirrorcnt - 1; 6171 else if (error == 0 && ret != 0) 6172 error = ret; 6173 NFSD_DEBUG(4, "nfsrv_setacldsrpc: aft setextat=%d\n", error); 6174 tdrpc = drpc; 6175 timo = hz / 50; /* Wait for 20msec. */ 6176 if (timo < 1) 6177 timo = 1; 6178 for (i = 0; i < mirrorcnt - 1; i++, tdrpc++) { 6179 /* Wait for RPCs on separate threads to complete. */ 6180 while (tdrpc->inprog != 0 && tdrpc->done == 0) 6181 tsleep(&tdrpc->tsk, PVFS, "srvacds", timo); 6182 if (nfsds_failerr(tdrpc->err) && *failposp == -1) 6183 *failposp = i; 6184 else if (error == 0 && tdrpc->err != 0) 6185 error = tdrpc->err; 6186 } 6187 free(drpc, M_TEMP); 6188 return (error); 6189 } 6190 6191 /* 6192 * Getattr call to the DS for the attributes that change due to writing. 6193 */ 6194 static int 6195 nfsrv_getattrdsrpc(fhandle_t *fhp, struct ucred *cred, NFSPROC_T *p, 6196 struct vnode *vp, struct nfsmount *nmp, struct nfsvattr *nap) 6197 { 6198 struct nfsrv_descript *nd; 6199 int error; 6200 nfsattrbit_t attrbits; 6201 6202 NFSD_DEBUG(4, "in nfsrv_getattrdsrpc\n"); 6203 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 6204 nfscl_reqstart(nd, NFSPROC_GETATTR, nmp, (u_int8_t *)fhp, 6205 sizeof(fhandle_t), NULL, NULL, 0, 0); 6206 NFSZERO_ATTRBIT(&attrbits); 6207 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SIZE); 6208 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_CHANGE); 6209 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEACCESS); 6210 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_TIMEMODIFY); 6211 NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_SPACEUSED); 6212 (void) nfsrv_putattrbit(nd, &attrbits); 6213 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred, 6214 NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 6215 if (error != 0) { 6216 free(nd, M_TEMP); 6217 return (error); 6218 } 6219 NFSD_DEBUG(4, "nfsrv_getattrdsrpc: aft getattrrpc=%d\n", 6220 nd->nd_repstat); 6221 if (nd->nd_repstat == 0) { 6222 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, 6223 NULL, NULL, NULL, NULL, NULL, 0, NULL, NULL, NULL, 6224 NULL, NULL); 6225 /* 6226 * We can only save the updated values in the extended 6227 * attribute if the vp is exclusively locked. 6228 * This should happen when any of the following operations 6229 * occur on the vnode: 6230 * Close, Delegreturn, LayoutCommit, LayoutReturn 6231 * As such, the updated extended attribute should get saved 6232 * before nfsrv_checkdsattr() returns 0 and allows the cached 6233 * attributes to be returned without calling this function. 6234 */ 6235 if (error == 0 && VOP_ISLOCKED(vp) == LK_EXCLUSIVE) { 6236 error = nfsrv_setextattr(vp, nap, p); 6237 NFSD_DEBUG(4, "nfsrv_getattrdsrpc: aft setextat=%d\n", 6238 error); 6239 } 6240 } else 6241 error = nd->nd_repstat; 6242 m_freem(nd->nd_mrep); 6243 free(nd, M_TEMP); 6244 NFSD_DEBUG(4, "nfsrv_getattrdsrpc error=%d\n", error); 6245 return (error); 6246 } 6247 6248 /* 6249 * Seek call to a DS. 6250 */ 6251 static int 6252 nfsrv_seekdsrpc(fhandle_t *fhp, off_t *offp, int content, bool *eofp, 6253 struct ucred *cred, NFSPROC_T *p, struct nfsmount *nmp) 6254 { 6255 uint32_t *tl; 6256 struct nfsrv_descript *nd; 6257 nfsv4stateid_t st; 6258 int error; 6259 6260 NFSD_DEBUG(4, "in nfsrv_seekdsrpc\n"); 6261 /* 6262 * Use a stateid where other is an alternating 01010 pattern and 6263 * seqid is 0xffffffff. This value is not defined as special by 6264 * the RFC and is used by the FreeBSD NFS server to indicate an 6265 * MDS->DS proxy operation. 6266 */ 6267 st.other[0] = 0x55555555; 6268 st.other[1] = 0x55555555; 6269 st.other[2] = 0x55555555; 6270 st.seqid = 0xffffffff; 6271 nd = malloc(sizeof(*nd), M_TEMP, M_WAITOK | M_ZERO); 6272 nfscl_reqstart(nd, NFSPROC_SEEKDS, nmp, (u_int8_t *)fhp, 6273 sizeof(fhandle_t), NULL, NULL, 0, 0); 6274 nfsm_stateidtom(nd, &st, NFSSTATEID_PUTSTATEID); 6275 NFSM_BUILD(tl, uint32_t *, NFSX_HYPER + NFSX_UNSIGNED); 6276 txdr_hyper(*offp, tl); tl += 2; 6277 *tl = txdr_unsigned(content); 6278 error = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, NULL, p, cred, 6279 NFS_PROG, NFS_VER4, NULL, 1, NULL, NULL); 6280 if (error != 0) { 6281 free(nd, M_TEMP); 6282 return (error); 6283 } 6284 NFSD_DEBUG(4, "nfsrv_seekdsrpc: aft seekrpc=%d\n", nd->nd_repstat); 6285 if (nd->nd_repstat == 0) { 6286 NFSM_DISSECT(tl, uint32_t *, NFSX_UNSIGNED + NFSX_HYPER); 6287 if (*tl++ == newnfs_true) 6288 *eofp = true; 6289 else 6290 *eofp = false; 6291 *offp = fxdr_hyper(tl); 6292 } else 6293 error = nd->nd_repstat; 6294 nfsmout: 6295 m_freem(nd->nd_mrep); 6296 free(nd, M_TEMP); 6297 NFSD_DEBUG(4, "nfsrv_seekdsrpc error=%d\n", error); 6298 return (error); 6299 } 6300 6301 /* 6302 * Get the device id and file handle for a DS file. 6303 */ 6304 int 6305 nfsrv_dsgetdevandfh(struct vnode *vp, NFSPROC_T *p, int *mirrorcntp, 6306 fhandle_t *fhp, char *devid) 6307 { 6308 int buflen, error; 6309 char *buf; 6310 6311 buflen = 1024; 6312 buf = malloc(buflen, M_TEMP, M_WAITOK); 6313 error = nfsrv_dsgetsockmnt(vp, 0, buf, &buflen, mirrorcntp, p, NULL, 6314 fhp, devid, NULL, NULL, NULL, NULL, NULL, NULL); 6315 free(buf, M_TEMP); 6316 return (error); 6317 } 6318 6319 /* 6320 * Do a Lookup against the DS for the filename. 6321 */ 6322 static int 6323 nfsrv_pnfslookupds(struct vnode *vp, struct vnode *dvp, struct pnfsdsfile *pf, 6324 struct vnode **nvpp, NFSPROC_T *p) 6325 { 6326 struct nameidata named; 6327 struct ucred *tcred; 6328 char *bufp; 6329 u_long *hashp; 6330 struct vnode *nvp; 6331 int error; 6332 6333 tcred = newnfs_getcred(); 6334 named.ni_cnd.cn_nameiop = LOOKUP; 6335 named.ni_cnd.cn_lkflags = LK_SHARED | LK_RETRY; 6336 named.ni_cnd.cn_cred = tcred; 6337 named.ni_cnd.cn_flags = ISLASTCN | LOCKPARENT | LOCKLEAF | SAVENAME; 6338 nfsvno_setpathbuf(&named, &bufp, &hashp); 6339 named.ni_cnd.cn_nameptr = bufp; 6340 named.ni_cnd.cn_namelen = strlen(pf->dsf_filename); 6341 strlcpy(bufp, pf->dsf_filename, NAME_MAX); 6342 NFSD_DEBUG(4, "nfsrv_pnfslookupds: filename=%s\n", bufp); 6343 error = VOP_LOOKUP(dvp, &nvp, &named.ni_cnd); 6344 NFSD_DEBUG(4, "nfsrv_pnfslookupds: aft LOOKUP=%d\n", error); 6345 NFSFREECRED(tcred); 6346 nfsvno_relpathbuf(&named); 6347 if (error == 0) 6348 *nvpp = nvp; 6349 NFSD_DEBUG(4, "eo nfsrv_pnfslookupds=%d\n", error); 6350 return (error); 6351 } 6352 6353 /* 6354 * Set the file handle to the correct one. 6355 */ 6356 static void 6357 nfsrv_pnfssetfh(struct vnode *vp, struct pnfsdsfile *pf, char *devid, 6358 char *fnamep, struct vnode *nvp, NFSPROC_T *p) 6359 { 6360 struct nfsnode *np; 6361 int ret = 0; 6362 6363 np = VTONFS(nvp); 6364 NFSBCOPY(np->n_fhp->nfh_fh, &pf->dsf_fh, NFSX_MYFH); 6365 /* 6366 * We can only do a vn_set_extattr() if the vnode is exclusively 6367 * locked and vn_start_write() has been done. If devid != NULL or 6368 * fnamep != NULL or the vnode is shared locked, vn_start_write() 6369 * may not have been done. 6370 * If not done now, it will be done on a future call. 6371 */ 6372 if (devid == NULL && fnamep == NULL && NFSVOPISLOCKED(vp) == 6373 LK_EXCLUSIVE) 6374 ret = vn_extattr_set(vp, IO_NODELOCKED, 6375 EXTATTR_NAMESPACE_SYSTEM, "pnfsd.dsfile", sizeof(*pf), 6376 (char *)pf, p); 6377 NFSD_DEBUG(4, "eo nfsrv_pnfssetfh=%d\n", ret); 6378 } 6379 6380 /* 6381 * Cause RPCs waiting on "nmp" to fail. This is called for a DS mount point 6382 * when the DS has failed. 6383 */ 6384 void 6385 nfsrv_killrpcs(struct nfsmount *nmp) 6386 { 6387 6388 /* 6389 * Call newnfs_nmcancelreqs() to cause 6390 * any RPCs in progress on the mount point to 6391 * fail. 6392 * This will cause any process waiting for an 6393 * RPC to complete while holding a vnode lock 6394 * on the mounted-on vnode (such as "df" or 6395 * a non-forced "umount") to fail. 6396 * This will unlock the mounted-on vnode so 6397 * a forced dismount can succeed. 6398 * The NFSMNTP_CANCELRPCS flag should be set when this function is 6399 * called. 6400 */ 6401 newnfs_nmcancelreqs(nmp); 6402 } 6403 6404 /* 6405 * Sum up the statfs info for each of the DSs, so that the client will 6406 * receive the total for all DSs. 6407 */ 6408 static int 6409 nfsrv_pnfsstatfs(struct statfs *sf, struct mount *mp) 6410 { 6411 struct statfs *tsf; 6412 struct nfsdevice *ds; 6413 struct vnode **dvpp, **tdvpp, *dvp; 6414 uint64_t tot; 6415 int cnt, error = 0, i; 6416 6417 if (nfsrv_devidcnt <= 0) 6418 return (ENXIO); 6419 dvpp = mallocarray(nfsrv_devidcnt, sizeof(*dvpp), M_TEMP, M_WAITOK); 6420 tsf = malloc(sizeof(*tsf), M_TEMP, M_WAITOK); 6421 6422 /* Get an array of the dvps for the DSs. */ 6423 tdvpp = dvpp; 6424 i = 0; 6425 NFSDDSLOCK(); 6426 /* First, search for matches for same file system. */ 6427 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 6428 if (ds->nfsdev_nmp != NULL && ds->nfsdev_mdsisset != 0 && 6429 fsidcmp(&ds->nfsdev_mdsfsid, &mp->mnt_stat.f_fsid) == 0) { 6430 if (++i > nfsrv_devidcnt) 6431 break; 6432 *tdvpp++ = ds->nfsdev_dvp; 6433 } 6434 } 6435 /* 6436 * If no matches for same file system, total all servers not assigned 6437 * to a file system. 6438 */ 6439 if (i == 0) { 6440 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 6441 if (ds->nfsdev_nmp != NULL && 6442 ds->nfsdev_mdsisset == 0) { 6443 if (++i > nfsrv_devidcnt) 6444 break; 6445 *tdvpp++ = ds->nfsdev_dvp; 6446 } 6447 } 6448 } 6449 NFSDDSUNLOCK(); 6450 cnt = i; 6451 6452 /* Do a VFS_STATFS() for each of the DSs and sum them up. */ 6453 tdvpp = dvpp; 6454 for (i = 0; i < cnt && error == 0; i++) { 6455 dvp = *tdvpp++; 6456 error = VFS_STATFS(dvp->v_mount, tsf); 6457 if (error == 0) { 6458 if (sf->f_bsize == 0) { 6459 if (tsf->f_bsize > 0) 6460 sf->f_bsize = tsf->f_bsize; 6461 else 6462 sf->f_bsize = 8192; 6463 } 6464 if (tsf->f_blocks > 0) { 6465 if (sf->f_bsize != tsf->f_bsize) { 6466 tot = tsf->f_blocks * tsf->f_bsize; 6467 sf->f_blocks += (tot / sf->f_bsize); 6468 } else 6469 sf->f_blocks += tsf->f_blocks; 6470 } 6471 if (tsf->f_bfree > 0) { 6472 if (sf->f_bsize != tsf->f_bsize) { 6473 tot = tsf->f_bfree * tsf->f_bsize; 6474 sf->f_bfree += (tot / sf->f_bsize); 6475 } else 6476 sf->f_bfree += tsf->f_bfree; 6477 } 6478 if (tsf->f_bavail > 0) { 6479 if (sf->f_bsize != tsf->f_bsize) { 6480 tot = tsf->f_bavail * tsf->f_bsize; 6481 sf->f_bavail += (tot / sf->f_bsize); 6482 } else 6483 sf->f_bavail += tsf->f_bavail; 6484 } 6485 } 6486 } 6487 free(tsf, M_TEMP); 6488 free(dvpp, M_TEMP); 6489 return (error); 6490 } 6491 6492 /* 6493 * Set an NFSv4 acl. 6494 */ 6495 int 6496 nfsrv_setacl(struct vnode *vp, NFSACL_T *aclp, struct ucred *cred, NFSPROC_T *p) 6497 { 6498 int error; 6499 6500 if (nfsrv_useacl == 0 || nfs_supportsnfsv4acls(vp) == 0) { 6501 error = NFSERR_ATTRNOTSUPP; 6502 goto out; 6503 } 6504 /* 6505 * With NFSv4 ACLs, chmod(2) may need to add additional entries. 6506 * Make sure it has enough room for that - splitting every entry 6507 * into two and appending "canonical six" entries at the end. 6508 * Cribbed out of kern/vfs_acl.c - Rick M. 6509 */ 6510 if (aclp->acl_cnt > (ACL_MAX_ENTRIES - 6) / 2) { 6511 error = NFSERR_ATTRNOTSUPP; 6512 goto out; 6513 } 6514 error = VOP_SETACL(vp, ACL_TYPE_NFS4, aclp, cred, p); 6515 if (error == 0) { 6516 error = nfsrv_dssetacl(vp, aclp, cred, p); 6517 if (error == ENOENT) 6518 error = 0; 6519 } 6520 6521 out: 6522 NFSEXITCODE(error); 6523 return (error); 6524 } 6525 6526 /* 6527 * Seek vnode op call (actually it is a VOP_IOCTL()). 6528 * This function is called with the vnode locked, but unlocks and vrele()s 6529 * the vp before returning. 6530 */ 6531 int 6532 nfsvno_seek(struct nfsrv_descript *nd, struct vnode *vp, u_long cmd, 6533 off_t *offp, int content, bool *eofp, struct ucred *cred, NFSPROC_T *p) 6534 { 6535 struct nfsvattr at; 6536 int error, ret; 6537 6538 ASSERT_VOP_LOCKED(vp, "nfsvno_seek vp"); 6539 /* 6540 * Attempt to seek on a DS file. A return of ENOENT implies 6541 * there is no DS file to seek on. 6542 */ 6543 error = nfsrv_proxyds(vp, 0, 0, cred, p, NFSPROC_SEEKDS, NULL, 6544 NULL, NULL, NULL, NULL, offp, content, eofp); 6545 if (error != ENOENT) { 6546 vput(vp); 6547 return (error); 6548 } 6549 6550 /* 6551 * Do the VOP_IOCTL() call. For the case where *offp == file_size, 6552 * VOP_IOCTL() will return ENXIO. However, the correct reply for 6553 * NFSv4.2 is *eofp == true and error == 0 for this case. 6554 */ 6555 NFSVOPUNLOCK(vp); 6556 error = VOP_IOCTL(vp, cmd, offp, 0, cred, p); 6557 *eofp = false; 6558 if (error == ENXIO || (error == 0 && cmd == FIOSEEKHOLE)) { 6559 /* Handle the cases where we might be at EOF. */ 6560 ret = nfsvno_getattr(vp, &at, nd, p, 0, NULL); 6561 if (ret == 0 && *offp == at.na_size) { 6562 *eofp = true; 6563 error = 0; 6564 } 6565 if (ret != 0 && error == 0) 6566 error = ret; 6567 } 6568 vrele(vp); 6569 NFSEXITCODE(error); 6570 return (error); 6571 } 6572 6573 /* 6574 * Allocate vnode op call. 6575 */ 6576 int 6577 nfsvno_allocate(struct vnode *vp, off_t off, off_t len, struct ucred *cred, 6578 NFSPROC_T *p) 6579 { 6580 int error; 6581 off_t olen; 6582 6583 ASSERT_VOP_ELOCKED(vp, "nfsvno_allocate vp"); 6584 /* 6585 * Attempt to allocate on a DS file. A return of ENOENT implies 6586 * there is no DS file to allocate on. 6587 */ 6588 error = nfsrv_proxyds(vp, off, 0, cred, p, NFSPROC_ALLOCATE, NULL, 6589 NULL, NULL, NULL, NULL, &len, 0, NULL); 6590 if (error != ENOENT) 6591 return (error); 6592 6593 /* 6594 * Do the actual VOP_ALLOCATE(), looping so long as 6595 * progress is being made, to achieve completion. 6596 */ 6597 do { 6598 olen = len; 6599 error = VOP_ALLOCATE(vp, &off, &len, IO_SYNC, cred); 6600 if (error == 0 && len > 0 && olen > len) 6601 maybe_yield(); 6602 } while (error == 0 && len > 0 && olen > len); 6603 if (error == 0 && len > 0) 6604 error = NFSERR_IO; 6605 NFSEXITCODE(error); 6606 return (error); 6607 } 6608 6609 /* 6610 * Deallocate vnode op call. 6611 */ 6612 int 6613 nfsvno_deallocate(struct vnode *vp, off_t off, off_t len, struct ucred *cred, 6614 NFSPROC_T *p) 6615 { 6616 int error; 6617 off_t olen; 6618 6619 ASSERT_VOP_ELOCKED(vp, "nfsvno_deallocate vp"); 6620 /* 6621 * Attempt to deallocate on a DS file. A return of ENOENT implies 6622 * there is no DS file to deallocate on. 6623 */ 6624 error = nfsrv_proxyds(vp, off, 0, cred, p, NFSPROC_DEALLOCATE, NULL, 6625 NULL, NULL, NULL, NULL, &len, 0, NULL); 6626 if (error != ENOENT) 6627 return (error); 6628 6629 /* 6630 * Do the actual VOP_DEALLOCATE(), looping so long as 6631 * progress is being made, to achieve completion. 6632 */ 6633 do { 6634 olen = len; 6635 error = VOP_DEALLOCATE(vp, &off, &len, 0, IO_SYNC, cred); 6636 if (error == 0 && len > 0 && olen > len) 6637 maybe_yield(); 6638 } while (error == 0 && len > 0 && olen > len); 6639 if (error == 0 && len > 0) 6640 error = NFSERR_IO; 6641 NFSEXITCODE(error); 6642 return (error); 6643 } 6644 6645 /* 6646 * Get Extended Atribute vnode op into an mbuf list. 6647 */ 6648 int 6649 nfsvno_getxattr(struct vnode *vp, char *name, uint32_t maxresp, 6650 struct ucred *cred, uint64_t flag, int maxextsiz, struct thread *p, 6651 struct mbuf **mpp, struct mbuf **mpendp, int *lenp) 6652 { 6653 struct iovec *iv; 6654 struct uio io, *uiop = &io; 6655 struct mbuf *m, *m2; 6656 int alen, error, len, tlen; 6657 size_t siz; 6658 6659 /* First, find out the size of the extended attribute. */ 6660 error = VOP_GETEXTATTR(vp, EXTATTR_NAMESPACE_USER, name, NULL, 6661 &siz, cred, p); 6662 if (error != 0) 6663 return (NFSERR_NOXATTR); 6664 if (siz > maxresp - NFS_MAXXDR) 6665 return (NFSERR_XATTR2BIG); 6666 len = siz; 6667 tlen = NFSM_RNDUP(len); 6668 if (tlen > 0) { 6669 /* 6670 * If cnt > MCLBYTES and the reply will not be saved, use 6671 * ext_pgs mbufs for TLS. 6672 * For NFSv4.0, we do not know for sure if the reply will 6673 * be saved, so do not use ext_pgs mbufs for NFSv4.0. 6674 * Always use ext_pgs mbufs if ND_EXTPG is set. 6675 */ 6676 if ((flag & ND_EXTPG) != 0 || (tlen > MCLBYTES && 6677 (flag & (ND_TLS | ND_SAVEREPLY)) == ND_TLS && 6678 (flag & (ND_NFSV4 | ND_NFSV41)) != ND_NFSV4)) 6679 uiop->uio_iovcnt = nfsrv_createiovec_extpgs(tlen, 6680 maxextsiz, &m, &m2, &iv); 6681 else 6682 uiop->uio_iovcnt = nfsrv_createiovec(tlen, &m, &m2, 6683 &iv); 6684 uiop->uio_iov = iv; 6685 } else { 6686 uiop->uio_iovcnt = 0; 6687 uiop->uio_iov = iv = NULL; 6688 m = m2 = NULL; 6689 } 6690 uiop->uio_offset = 0; 6691 uiop->uio_resid = tlen; 6692 uiop->uio_rw = UIO_READ; 6693 uiop->uio_segflg = UIO_SYSSPACE; 6694 uiop->uio_td = p; 6695 #ifdef MAC 6696 error = mac_vnode_check_getextattr(cred, vp, EXTATTR_NAMESPACE_USER, 6697 name); 6698 if (error != 0) 6699 goto out; 6700 #endif 6701 6702 if (tlen > 0) 6703 error = VOP_GETEXTATTR(vp, EXTATTR_NAMESPACE_USER, name, uiop, 6704 NULL, cred, p); 6705 if (error != 0) 6706 goto out; 6707 if (uiop->uio_resid > 0) { 6708 alen = tlen; 6709 len = tlen - uiop->uio_resid; 6710 tlen = NFSM_RNDUP(len); 6711 if (alen != tlen) 6712 printf("nfsvno_getxattr: weird size read\n"); 6713 if (tlen == 0) { 6714 m_freem(m); 6715 m = m2 = NULL; 6716 } else if (alen != tlen || tlen != len) 6717 m2 = nfsrv_adj(m, alen - tlen, tlen - len); 6718 } 6719 *lenp = len; 6720 *mpp = m; 6721 *mpendp = m2; 6722 6723 out: 6724 if (error != 0) { 6725 if (m != NULL) 6726 m_freem(m); 6727 *lenp = 0; 6728 } 6729 free(iv, M_TEMP); 6730 NFSEXITCODE(error); 6731 return (error); 6732 } 6733 6734 /* 6735 * Set Extended attribute vnode op from an mbuf list. 6736 */ 6737 int 6738 nfsvno_setxattr(struct vnode *vp, char *name, int len, struct mbuf *m, 6739 char *cp, struct ucred *cred, struct thread *p) 6740 { 6741 struct iovec *iv; 6742 struct uio uio, *uiop = &uio; 6743 int cnt, error; 6744 6745 error = 0; 6746 #ifdef MAC 6747 error = mac_vnode_check_setextattr(cred, vp, EXTATTR_NAMESPACE_USER, 6748 name); 6749 #endif 6750 if (error != 0) 6751 goto out; 6752 6753 uiop->uio_rw = UIO_WRITE; 6754 uiop->uio_segflg = UIO_SYSSPACE; 6755 uiop->uio_td = p; 6756 uiop->uio_offset = 0; 6757 uiop->uio_resid = len; 6758 if (len > 0) { 6759 error = nfsrv_createiovecw(len, m, cp, &iv, &cnt); 6760 uiop->uio_iov = iv; 6761 uiop->uio_iovcnt = cnt; 6762 } else { 6763 uiop->uio_iov = iv = NULL; 6764 uiop->uio_iovcnt = 0; 6765 } 6766 if (error == 0) { 6767 error = VOP_SETEXTATTR(vp, EXTATTR_NAMESPACE_USER, name, uiop, 6768 cred, p); 6769 free(iv, M_TEMP); 6770 } 6771 6772 out: 6773 NFSEXITCODE(error); 6774 return (error); 6775 } 6776 6777 /* 6778 * Remove Extended attribute vnode op. 6779 */ 6780 int 6781 nfsvno_rmxattr(struct nfsrv_descript *nd, struct vnode *vp, char *name, 6782 struct ucred *cred, struct thread *p) 6783 { 6784 int error; 6785 6786 /* 6787 * Get rid of any delegations. I am not sure why this is required, 6788 * but RFC-8276 says so. 6789 */ 6790 error = nfsrv_checkremove(vp, 0, nd, nd->nd_clientid, p); 6791 if (error != 0) 6792 goto out; 6793 #ifdef MAC 6794 error = mac_vnode_check_deleteextattr(cred, vp, EXTATTR_NAMESPACE_USER, 6795 name); 6796 if (error != 0) 6797 goto out; 6798 #endif 6799 6800 error = VOP_DELETEEXTATTR(vp, EXTATTR_NAMESPACE_USER, name, cred, p); 6801 if (error == EOPNOTSUPP) 6802 error = VOP_SETEXTATTR(vp, EXTATTR_NAMESPACE_USER, name, NULL, 6803 cred, p); 6804 out: 6805 NFSEXITCODE(error); 6806 return (error); 6807 } 6808 6809 /* 6810 * List Extended Atribute vnode op into an mbuf list. 6811 */ 6812 int 6813 nfsvno_listxattr(struct vnode *vp, uint64_t cookie, struct ucred *cred, 6814 struct thread *p, u_char **bufp, uint32_t *lenp, bool *eofp) 6815 { 6816 struct iovec iv; 6817 struct uio io; 6818 int error; 6819 size_t siz; 6820 6821 *bufp = NULL; 6822 /* First, find out the size of the extended attribute. */ 6823 error = VOP_LISTEXTATTR(vp, EXTATTR_NAMESPACE_USER, NULL, &siz, cred, 6824 p); 6825 if (error != 0) 6826 return (NFSERR_NOXATTR); 6827 if (siz <= cookie) { 6828 *lenp = 0; 6829 *eofp = true; 6830 goto out; 6831 } 6832 if (siz > cookie + *lenp) { 6833 siz = cookie + *lenp; 6834 *eofp = false; 6835 } else 6836 *eofp = true; 6837 /* Just choose a sanity limit of 10Mbytes for malloc(M_TEMP). */ 6838 if (siz > 10 * 1024 * 1024) { 6839 error = NFSERR_XATTR2BIG; 6840 goto out; 6841 } 6842 *bufp = malloc(siz, M_TEMP, M_WAITOK); 6843 iv.iov_base = *bufp; 6844 iv.iov_len = siz; 6845 io.uio_iovcnt = 1; 6846 io.uio_iov = &iv; 6847 io.uio_offset = 0; 6848 io.uio_resid = siz; 6849 io.uio_rw = UIO_READ; 6850 io.uio_segflg = UIO_SYSSPACE; 6851 io.uio_td = p; 6852 #ifdef MAC 6853 error = mac_vnode_check_listextattr(cred, vp, EXTATTR_NAMESPACE_USER); 6854 if (error != 0) 6855 goto out; 6856 #endif 6857 6858 error = VOP_LISTEXTATTR(vp, EXTATTR_NAMESPACE_USER, &io, NULL, cred, 6859 p); 6860 if (error != 0) 6861 goto out; 6862 if (io.uio_resid > 0) 6863 siz -= io.uio_resid; 6864 *lenp = siz; 6865 6866 out: 6867 if (error != 0) { 6868 free(*bufp, M_TEMP); 6869 *bufp = NULL; 6870 } 6871 NFSEXITCODE(error); 6872 return (error); 6873 } 6874 6875 /* 6876 * Trim trailing data off the mbuf list being built. 6877 */ 6878 void 6879 nfsm_trimtrailing(struct nfsrv_descript *nd, struct mbuf *mb, char *bpos, 6880 int bextpg, int bextpgsiz) 6881 { 6882 vm_page_t pg; 6883 int fullpgsiz, i; 6884 6885 if (mb->m_next != NULL) { 6886 m_freem(mb->m_next); 6887 mb->m_next = NULL; 6888 } 6889 if ((mb->m_flags & M_EXTPG) != 0) { 6890 KASSERT(bextpg >= 0 && bextpg < mb->m_epg_npgs, 6891 ("nfsm_trimtrailing: bextpg out of range")); 6892 KASSERT(bpos == (char *)(void *) 6893 PHYS_TO_DMAP(mb->m_epg_pa[bextpg]) + PAGE_SIZE - bextpgsiz, 6894 ("nfsm_trimtrailing: bextpgsiz bad!")); 6895 6896 /* First, get rid of any pages after this position. */ 6897 for (i = mb->m_epg_npgs - 1; i > bextpg; i--) { 6898 pg = PHYS_TO_VM_PAGE(mb->m_epg_pa[i]); 6899 vm_page_unwire_noq(pg); 6900 vm_page_free(pg); 6901 } 6902 mb->m_epg_npgs = bextpg + 1; 6903 if (bextpg == 0) 6904 fullpgsiz = PAGE_SIZE - mb->m_epg_1st_off; 6905 else 6906 fullpgsiz = PAGE_SIZE; 6907 mb->m_epg_last_len = fullpgsiz - bextpgsiz; 6908 mb->m_len = m_epg_pagelen(mb, 0, mb->m_epg_1st_off); 6909 for (i = 1; i < mb->m_epg_npgs; i++) 6910 mb->m_len += m_epg_pagelen(mb, i, 0); 6911 nd->nd_bextpgsiz = bextpgsiz; 6912 nd->nd_bextpg = bextpg; 6913 } else 6914 mb->m_len = bpos - mtod(mb, char *); 6915 nd->nd_mb = mb; 6916 nd->nd_bpos = bpos; 6917 } 6918 6919 6920 /* 6921 * Check to see if a put file handle operation should test for 6922 * NFSERR_WRONGSEC, although NFSv3 actually returns NFSERR_AUTHERR. 6923 * When Open is the next operation, NFSERR_WRONGSEC cannot be 6924 * replied for the Open cases that use a component. Thia can 6925 * be identified by the fact that the file handle's type is VDIR. 6926 */ 6927 bool 6928 nfsrv_checkwrongsec(struct nfsrv_descript *nd, int nextop, enum vtype vtyp) 6929 { 6930 6931 if ((nd->nd_flag & ND_NFSV4) == 0) { 6932 if (nd->nd_procnum == NFSPROC_FSINFO) 6933 return (false); 6934 return (true); 6935 } 6936 6937 if ((nd->nd_flag & ND_LASTOP) != 0) 6938 return (false); 6939 6940 if (nextop == NFSV4OP_PUTROOTFH || nextop == NFSV4OP_PUTFH || 6941 nextop == NFSV4OP_PUTPUBFH || nextop == NFSV4OP_RESTOREFH || 6942 nextop == NFSV4OP_LOOKUP || nextop == NFSV4OP_LOOKUPP || 6943 nextop == NFSV4OP_SECINFO || nextop == NFSV4OP_SECINFONONAME) 6944 return (false); 6945 if (nextop == NFSV4OP_OPEN && vtyp == VDIR) 6946 return (false); 6947 return (true); 6948 } 6949 6950 /* 6951 * Check DSs marked no space. 6952 */ 6953 void 6954 nfsrv_checknospc(void) 6955 { 6956 struct statfs *tsf; 6957 struct nfsdevice *ds; 6958 struct vnode **dvpp, **tdvpp, *dvp; 6959 char *devid, *tdevid; 6960 int cnt, error = 0, i; 6961 6962 if (nfsrv_devidcnt <= 0) 6963 return; 6964 dvpp = mallocarray(nfsrv_devidcnt, sizeof(*dvpp), M_TEMP, M_WAITOK); 6965 devid = malloc(nfsrv_devidcnt * NFSX_V4DEVICEID, M_TEMP, M_WAITOK); 6966 tsf = malloc(sizeof(*tsf), M_TEMP, M_WAITOK); 6967 6968 /* Get an array of the dvps for the DSs. */ 6969 tdvpp = dvpp; 6970 tdevid = devid; 6971 i = 0; 6972 NFSDDSLOCK(); 6973 /* First, search for matches for same file system. */ 6974 TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { 6975 if (ds->nfsdev_nmp != NULL && ds->nfsdev_nospc) { 6976 if (++i > nfsrv_devidcnt) 6977 break; 6978 *tdvpp++ = ds->nfsdev_dvp; 6979 NFSBCOPY(ds->nfsdev_deviceid, tdevid, NFSX_V4DEVICEID); 6980 tdevid += NFSX_V4DEVICEID; 6981 } 6982 } 6983 NFSDDSUNLOCK(); 6984 6985 /* Do a VFS_STATFS() for each of the DSs and clear no space. */ 6986 cnt = i; 6987 tdvpp = dvpp; 6988 tdevid = devid; 6989 for (i = 0; i < cnt && error == 0; i++) { 6990 dvp = *tdvpp++; 6991 error = VFS_STATFS(dvp->v_mount, tsf); 6992 if (error == 0 && tsf->f_bavail > 0) { 6993 NFSD_DEBUG(1, "nfsrv_checknospc: reset nospc\n"); 6994 nfsrv_marknospc(tdevid, false); 6995 } 6996 tdevid += NFSX_V4DEVICEID; 6997 } 6998 free(tsf, M_TEMP); 6999 free(dvpp, M_TEMP); 7000 free(devid, M_TEMP); 7001 } 7002 7003 extern int (*nfsd_call_nfsd)(struct thread *, struct nfssvc_args *); 7004 7005 /* 7006 * Called once to initialize data structures... 7007 */ 7008 static int 7009 nfsd_modevent(module_t mod, int type, void *data) 7010 { 7011 int error = 0, i; 7012 static int loaded = 0; 7013 7014 switch (type) { 7015 case MOD_LOAD: 7016 if (loaded) 7017 goto out; 7018 newnfs_portinit(); 7019 for (i = 0; i < NFSRVCACHE_HASHSIZE; i++) { 7020 mtx_init(&nfsrchash_table[i].mtx, "nfsrtc", NULL, 7021 MTX_DEF); 7022 mtx_init(&nfsrcahash_table[i].mtx, "nfsrtca", NULL, 7023 MTX_DEF); 7024 } 7025 mtx_init(&nfsrc_udpmtx, "nfsuc", NULL, MTX_DEF); 7026 mtx_init(&nfs_v4root_mutex, "nfs4rt", NULL, MTX_DEF); 7027 mtx_init(&nfsv4root_mnt.mnt_mtx, "nfs4mnt", NULL, MTX_DEF); 7028 mtx_init(&nfsrv_dontlistlock_mtx, "nfs4dnl", NULL, MTX_DEF); 7029 mtx_init(&nfsrv_recalllock_mtx, "nfs4rec", NULL, MTX_DEF); 7030 lockinit(&nfsv4root_mnt.mnt_explock, PVFS, "explock", 0, 0); 7031 nfsrvd_initcache(); 7032 nfsd_init(); 7033 NFSD_LOCK(); 7034 nfsrvd_init(0); 7035 NFSD_UNLOCK(); 7036 nfsd_mntinit(); 7037 #ifdef VV_DISABLEDELEG 7038 vn_deleg_ops.vndeleg_recall = nfsd_recalldelegation; 7039 vn_deleg_ops.vndeleg_disable = nfsd_disabledelegation; 7040 #endif 7041 nfsd_call_servertimer = nfsrv_servertimer; 7042 nfsd_call_nfsd = nfssvc_nfsd; 7043 loaded = 1; 7044 break; 7045 7046 case MOD_UNLOAD: 7047 if (newnfs_numnfsd != 0) { 7048 error = EBUSY; 7049 break; 7050 } 7051 7052 #ifdef VV_DISABLEDELEG 7053 vn_deleg_ops.vndeleg_recall = NULL; 7054 vn_deleg_ops.vndeleg_disable = NULL; 7055 #endif 7056 nfsd_call_servertimer = NULL; 7057 nfsd_call_nfsd = NULL; 7058 7059 /* Clean out all NFSv4 state. */ 7060 nfsrv_throwawayallstate(curthread); 7061 7062 /* Clean the NFS server reply cache */ 7063 nfsrvd_cleancache(); 7064 7065 /* Free up the krpc server pool. */ 7066 if (nfsrvd_pool != NULL) 7067 svcpool_destroy(nfsrvd_pool); 7068 7069 /* and get rid of the locks */ 7070 for (i = 0; i < NFSRVCACHE_HASHSIZE; i++) { 7071 mtx_destroy(&nfsrchash_table[i].mtx); 7072 mtx_destroy(&nfsrcahash_table[i].mtx); 7073 } 7074 mtx_destroy(&nfsrc_udpmtx); 7075 mtx_destroy(&nfs_v4root_mutex); 7076 mtx_destroy(&nfsv4root_mnt.mnt_mtx); 7077 mtx_destroy(&nfsrv_dontlistlock_mtx); 7078 mtx_destroy(&nfsrv_recalllock_mtx); 7079 for (i = 0; i < nfsrv_sessionhashsize; i++) 7080 mtx_destroy(&nfssessionhash[i].mtx); 7081 if (nfslayouthash != NULL) { 7082 for (i = 0; i < nfsrv_layouthashsize; i++) 7083 mtx_destroy(&nfslayouthash[i].mtx); 7084 free(nfslayouthash, M_NFSDSESSION); 7085 } 7086 lockdestroy(&nfsv4root_mnt.mnt_explock); 7087 free(nfsclienthash, M_NFSDCLIENT); 7088 free(nfslockhash, M_NFSDLOCKFILE); 7089 free(nfssessionhash, M_NFSDSESSION); 7090 loaded = 0; 7091 break; 7092 default: 7093 error = EOPNOTSUPP; 7094 break; 7095 } 7096 7097 out: 7098 NFSEXITCODE(error); 7099 return (error); 7100 } 7101 static moduledata_t nfsd_mod = { 7102 "nfsd", 7103 nfsd_modevent, 7104 NULL, 7105 }; 7106 DECLARE_MODULE(nfsd, nfsd_mod, SI_SUB_VFS, SI_ORDER_ANY); 7107 7108 /* So that loader and kldload(2) can find us, wherever we are.. */ 7109 MODULE_VERSION(nfsd, 1); 7110 MODULE_DEPEND(nfsd, nfscommon, 1, 1, 1); 7111 MODULE_DEPEND(nfsd, nfslockd, 1, 1, 1); 7112 MODULE_DEPEND(nfsd, krpc, 1, 1, 1); 7113 MODULE_DEPEND(nfsd, nfssvc, 1, 1, 1); 7114