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 * $FreeBSD$ 35 */ 36 37 #ifndef _NFS_NFSPORT_H_ 38 #define _NFS_NFSPORT_H_ 39 40 /* 41 * In general, I'm not fond of #includes in .h files, but this seems 42 * to be the cleanest way to handle #include files for the ports. 43 */ 44 #ifdef _KERNEL 45 #include <sys/unistd.h> 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/conf.h> 49 #include <sys/dirent.h> 50 #include <sys/domain.h> 51 #include <sys/fcntl.h> 52 #include <sys/file.h> 53 #include <sys/filedesc.h> 54 #include <sys/jail.h> 55 #include <sys/kernel.h> 56 #include <sys/lockf.h> 57 #include <sys/malloc.h> 58 #include <sys/mbuf.h> 59 #include <sys/mount.h> 60 #include <sys/mutex.h> 61 #include <sys/namei.h> 62 #include <sys/proc.h> 63 #include <sys/protosw.h> 64 #include <sys/reboot.h> 65 #include <sys/resourcevar.h> 66 #include <sys/signalvar.h> 67 #include <sys/socket.h> 68 #include <sys/socketvar.h> 69 #include <sys/stat.h> 70 #include <sys/syslog.h> 71 #include <sys/sysproto.h> 72 #include <sys/time.h> 73 #include <sys/uio.h> 74 #include <sys/vnode.h> 75 #include <sys/bio.h> 76 #include <sys/buf.h> 77 #include <sys/acl.h> 78 #include <sys/module.h> 79 #include <sys/sysent.h> 80 #include <sys/syscall.h> 81 #include <sys/priv.h> 82 #include <sys/kthread.h> 83 #include <sys/syscallsubr.h> 84 #include <net/if.h> 85 #include <net/if_var.h> 86 #include <net/radix.h> 87 #include <net/route.h> 88 #include <net/if_dl.h> 89 #include <netinet/in.h> 90 #include <netinet/in_pcb.h> 91 #include <netinet/in_systm.h> 92 #include <netinet/in_var.h> 93 #include <netinet/ip.h> 94 #include <netinet/ip_var.h> 95 #include <netinet/tcp.h> 96 #include <netinet/tcp_fsm.h> 97 #include <netinet/tcp_seq.h> 98 #include <netinet/tcp_timer.h> 99 #include <netinet/tcp_var.h> 100 #include <machine/in_cksum.h> 101 #include <crypto/des/des.h> 102 #include <sys/md5.h> 103 #include <rpc/rpc.h> 104 #include <rpc/rpcsec_gss.h> 105 106 /* 107 * For Darwin, these functions should be "static" when built in a kext. 108 * (This is always defined as nil otherwise.) 109 */ 110 #define APPLESTATIC 111 #include <ufs/ufs/dir.h> 112 #include <ufs/ufs/quota.h> 113 #include <ufs/ufs/inode.h> 114 #include <ufs/ufs/extattr.h> 115 #include <ufs/ufs/ufsmount.h> 116 #include <vm/uma.h> 117 #include <vm/vm.h> 118 #include <vm/vm_object.h> 119 #include <vm/vm_extern.h> 120 #include <nfs/nfssvc.h> 121 #include "opt_nfs.h" 122 #include "opt_ufs.h" 123 124 /* 125 * These types must be defined before the nfs includes. 126 */ 127 #define NFSSOCKADDR_T struct sockaddr * 128 #define NFSPROC_T struct thread 129 #define NFSDEV_T dev_t 130 #define NFSSVCARGS nfssvc_args 131 #define NFSACL_T struct acl 132 133 /* 134 * These should be defined as the types used for the corresponding VOP's 135 * argument type. 136 */ 137 #define NFS_ACCESS_ARGS struct vop_access_args 138 #define NFS_OPEN_ARGS struct vop_open_args 139 #define NFS_GETATTR_ARGS struct vop_getattr_args 140 #define NFS_LOOKUP_ARGS struct vop_lookup_args 141 #define NFS_READDIR_ARGS struct vop_readdir_args 142 143 /* 144 * Allocate mbufs. Must succeed and never set the mbuf ptr to NULL. 145 */ 146 #define NFSMGET(m) do { \ 147 MGET((m), M_WAITOK, MT_DATA); \ 148 while ((m) == NULL ) { \ 149 (void) nfs_catnap(PZERO, 0, "nfsmget"); \ 150 MGET((m), M_WAITOK, MT_DATA); \ 151 } \ 152 } while (0) 153 #define NFSMGETHDR(m) do { \ 154 MGETHDR((m), M_WAITOK, MT_DATA); \ 155 while ((m) == NULL ) { \ 156 (void) nfs_catnap(PZERO, 0, "nfsmget"); \ 157 MGETHDR((m), M_WAITOK, MT_DATA); \ 158 } \ 159 } while (0) 160 #define NFSMCLGET(m, w) do { \ 161 MGET((m), M_WAITOK, MT_DATA); \ 162 while ((m) == NULL ) { \ 163 (void) nfs_catnap(PZERO, 0, "nfsmget"); \ 164 MGET((m), M_WAITOK, MT_DATA); \ 165 } \ 166 MCLGET((m), (w)); \ 167 } while (0) 168 #define NFSMCLGETHDR(m, w) do { \ 169 MGETHDR((m), M_WAITOK, MT_DATA); \ 170 while ((m) == NULL ) { \ 171 (void) nfs_catnap(PZERO, 0, "nfsmget"); \ 172 MGETHDR((m), M_WAITOK, MT_DATA); \ 173 } \ 174 } while (0) 175 #define NFSMTOD mtod 176 177 /* 178 * Client side constant for size of a lockowner name. 179 */ 180 #define NFSV4CL_LOCKNAMELEN 12 181 182 /* 183 * Type for a mutex lock. 184 */ 185 #define NFSMUTEX_T struct mtx 186 187 #endif /* _KERNEL */ 188 189 /* 190 * NFSv4 Operation numbers. 191 */ 192 #define NFSV4OP_ACCESS 3 193 #define NFSV4OP_CLOSE 4 194 #define NFSV4OP_COMMIT 5 195 #define NFSV4OP_CREATE 6 196 #define NFSV4OP_DELEGPURGE 7 197 #define NFSV4OP_DELEGRETURN 8 198 #define NFSV4OP_GETATTR 9 199 #define NFSV4OP_GETFH 10 200 #define NFSV4OP_LINK 11 201 #define NFSV4OP_LOCK 12 202 #define NFSV4OP_LOCKT 13 203 #define NFSV4OP_LOCKU 14 204 #define NFSV4OP_LOOKUP 15 205 #define NFSV4OP_LOOKUPP 16 206 #define NFSV4OP_NVERIFY 17 207 #define NFSV4OP_OPEN 18 208 #define NFSV4OP_OPENATTR 19 209 #define NFSV4OP_OPENCONFIRM 20 210 #define NFSV4OP_OPENDOWNGRADE 21 211 #define NFSV4OP_PUTFH 22 212 #define NFSV4OP_PUTPUBFH 23 213 #define NFSV4OP_PUTROOTFH 24 214 #define NFSV4OP_READ 25 215 #define NFSV4OP_READDIR 26 216 #define NFSV4OP_READLINK 27 217 #define NFSV4OP_REMOVE 28 218 #define NFSV4OP_RENAME 29 219 #define NFSV4OP_RENEW 30 220 #define NFSV4OP_RESTOREFH 31 221 #define NFSV4OP_SAVEFH 32 222 #define NFSV4OP_SECINFO 33 223 #define NFSV4OP_SETATTR 34 224 #define NFSV4OP_SETCLIENTID 35 225 #define NFSV4OP_SETCLIENTIDCFRM 36 226 #define NFSV4OP_VERIFY 37 227 #define NFSV4OP_WRITE 38 228 #define NFSV4OP_RELEASELCKOWN 39 229 230 /* 231 * Must be one greater than the last Operation#. 232 */ 233 #define NFSV4OP_NOPS 40 234 235 /* 236 * Additional Ops for NFSv4.1. 237 */ 238 #define NFSV4OP_BACKCHANNELCTL 40 239 #define NFSV4OP_BINDCONNTOSESS 41 240 #define NFSV4OP_EXCHANGEID 42 241 #define NFSV4OP_CREATESESSION 43 242 #define NFSV4OP_DESTROYSESSION 44 243 #define NFSV4OP_FREESTATEID 45 244 #define NFSV4OP_GETDIRDELEG 46 245 #define NFSV4OP_GETDEVINFO 47 246 #define NFSV4OP_GETDEVLIST 48 247 #define NFSV4OP_LAYOUTCOMMIT 49 248 #define NFSV4OP_LAYOUTGET 50 249 #define NFSV4OP_LAYOUTRETURN 51 250 #define NFSV4OP_SECINFONONAME 52 251 #define NFSV4OP_SEQUENCE 53 252 #define NFSV4OP_SETSSV 54 253 #define NFSV4OP_TESTSTATEID 55 254 #define NFSV4OP_WANTDELEG 56 255 #define NFSV4OP_DESTROYCLIENTID 57 256 #define NFSV4OP_RECLAIMCOMPL 58 257 258 /* 259 * Must be one more than last op#. 260 * NFSv4.2 isn't implemented yet, but define the op# limit for it. 261 */ 262 #define NFSV41_NOPS 59 263 #define NFSV42_NOPS 72 264 265 /* Quirky case if the illegal op code */ 266 #define NFSV4OP_OPILLEGAL 10044 267 268 /* 269 * Fake NFSV4OP_xxx used for nfsstat. Start at NFSV42_NOPS. 270 */ 271 #define NFSV4OP_SYMLINK (NFSV42_NOPS) 272 #define NFSV4OP_MKDIR (NFSV42_NOPS + 1) 273 #define NFSV4OP_RMDIR (NFSV42_NOPS + 2) 274 #define NFSV4OP_READDIRPLUS (NFSV42_NOPS + 3) 275 #define NFSV4OP_MKNOD (NFSV42_NOPS + 4) 276 #define NFSV4OP_FSSTAT (NFSV42_NOPS + 5) 277 #define NFSV4OP_FSINFO (NFSV42_NOPS + 6) 278 #define NFSV4OP_PATHCONF (NFSV42_NOPS + 7) 279 #define NFSV4OP_V3CREATE (NFSV42_NOPS + 8) 280 281 /* 282 * This is the count of the fake operations listed above. 283 */ 284 #define NFSV4OP_FAKENOPS 9 285 286 /* 287 * and the Callback OPs 288 */ 289 #define NFSV4OP_CBGETATTR 3 290 #define NFSV4OP_CBRECALL 4 291 292 /* 293 * Must be one greater than the last Callback Operation# for NFSv4.0. 294 */ 295 #define NFSV4OP_CBNOPS 5 296 297 /* 298 * Additional Callback Ops for NFSv4.1 only. 299 */ 300 #define NFSV4OP_CBLAYOUTRECALL 5 301 #define NFSV4OP_CBNOTIFY 6 302 #define NFSV4OP_CBPUSHDELEG 7 303 #define NFSV4OP_CBRECALLANY 8 304 #define NFSV4OP_CBRECALLOBJAVAIL 9 305 #define NFSV4OP_CBRECALLSLOT 10 306 #define NFSV4OP_CBSEQUENCE 11 307 #define NFSV4OP_CBWANTCANCELLED 12 308 #define NFSV4OP_CBNOTIFYLOCK 13 309 #define NFSV4OP_CBNOTIFYDEVID 14 310 311 #define NFSV41_CBNOPS 15 312 #define NFSV42_CBNOPS 16 313 314 /* 315 * The lower numbers -> 21 are used by NFSv2 and v3. These define higher 316 * numbers used by NFSv4. 317 * NFS_V3NPROCS is one greater than the last V3 op and NFS_NPROCS is 318 * one greater than the last number. 319 */ 320 #ifndef NFS_V3NPROCS 321 #define NFS_V3NPROCS 22 322 323 #define NFSPROC_LOOKUPP 22 324 #define NFSPROC_SETCLIENTID 23 325 #define NFSPROC_SETCLIENTIDCFRM 24 326 #define NFSPROC_LOCK 25 327 #define NFSPROC_LOCKU 26 328 #define NFSPROC_OPEN 27 329 #define NFSPROC_CLOSE 28 330 #define NFSPROC_OPENCONFIRM 29 331 #define NFSPROC_LOCKT 30 332 #define NFSPROC_OPENDOWNGRADE 31 333 #define NFSPROC_RENEW 32 334 #define NFSPROC_PUTROOTFH 33 335 #define NFSPROC_RELEASELCKOWN 34 336 #define NFSPROC_DELEGRETURN 35 337 #define NFSPROC_RETDELEGREMOVE 36 338 #define NFSPROC_RETDELEGRENAME1 37 339 #define NFSPROC_RETDELEGRENAME2 38 340 #define NFSPROC_GETACL 39 341 #define NFSPROC_SETACL 40 342 343 /* 344 * Must be defined as one higher than the last Proc# above. 345 */ 346 #define NFSV4_NPROCS 41 347 348 /* Additional procedures for NFSv4.1. */ 349 #define NFSPROC_EXCHANGEID 41 350 #define NFSPROC_CREATESESSION 42 351 #define NFSPROC_DESTROYSESSION 43 352 #define NFSPROC_DESTROYCLIENT 44 353 #define NFSPROC_FREESTATEID 45 354 #define NFSPROC_LAYOUTGET 46 355 #define NFSPROC_GETDEVICEINFO 47 356 #define NFSPROC_LAYOUTCOMMIT 48 357 #define NFSPROC_LAYOUTRETURN 49 358 #define NFSPROC_RECLAIMCOMPL 50 359 #define NFSPROC_WRITEDS 51 360 #define NFSPROC_READDS 52 361 #define NFSPROC_COMMITDS 53 362 #define NFSPROC_OPENLAYGET 54 363 #define NFSPROC_CREATELAYGET 55 364 365 /* 366 * Must be defined as one higher than the last NFSv4.1 Proc# above. 367 */ 368 #define NFSV41_NPROCS 56 369 370 #endif /* NFS_V3NPROCS */ 371 372 /* 373 * New stats structure. 374 * The vers field will be set to NFSSTATS_V1 by the caller. 375 */ 376 #define NFSSTATS_V1 1 377 struct nfsstatsv1 { 378 int vers; /* Set to version requested by caller. */ 379 uint64_t attrcache_hits; 380 uint64_t attrcache_misses; 381 uint64_t lookupcache_hits; 382 uint64_t lookupcache_misses; 383 uint64_t direofcache_hits; 384 uint64_t direofcache_misses; 385 uint64_t accesscache_hits; 386 uint64_t accesscache_misses; 387 uint64_t biocache_reads; 388 uint64_t read_bios; 389 uint64_t read_physios; 390 uint64_t biocache_writes; 391 uint64_t write_bios; 392 uint64_t write_physios; 393 uint64_t biocache_readlinks; 394 uint64_t readlink_bios; 395 uint64_t biocache_readdirs; 396 uint64_t readdir_bios; 397 uint64_t rpccnt[NFSV41_NPROCS + 13]; 398 uint64_t rpcretries; 399 uint64_t srvrpccnt[NFSV42_NOPS + NFSV4OP_FAKENOPS]; 400 uint64_t srvrpc_errs; 401 uint64_t srv_errs; 402 uint64_t rpcrequests; 403 uint64_t rpctimeouts; 404 uint64_t rpcunexpected; 405 uint64_t rpcinvalid; 406 uint64_t srvcache_inproghits; 407 uint64_t srvcache_idemdonehits; 408 uint64_t srvcache_nonidemdonehits; 409 uint64_t srvcache_misses; 410 uint64_t srvcache_tcppeak; 411 int srvcache_size; /* Updated by atomic_xx_int(). */ 412 uint64_t srvclients; 413 uint64_t srvopenowners; 414 uint64_t srvopens; 415 uint64_t srvlockowners; 416 uint64_t srvlocks; 417 uint64_t srvdelegates; 418 uint64_t cbrpccnt[NFSV42_CBNOPS]; 419 uint64_t clopenowners; 420 uint64_t clopens; 421 uint64_t cllockowners; 422 uint64_t cllocks; 423 uint64_t cldelegates; 424 uint64_t cllocalopenowners; 425 uint64_t cllocalopens; 426 uint64_t cllocallockowners; 427 uint64_t cllocallocks; 428 uint64_t srvstartcnt; 429 uint64_t srvdonecnt; 430 uint64_t srvbytes[NFSV42_NOPS + NFSV4OP_FAKENOPS]; 431 uint64_t srvops[NFSV42_NOPS + NFSV4OP_FAKENOPS]; 432 struct bintime srvduration[NFSV42_NOPS + NFSV4OP_FAKENOPS]; 433 struct bintime busyfrom; 434 struct bintime busytime; 435 }; 436 437 /* 438 * Old stats structure. 439 */ 440 struct ext_nfsstats { 441 int attrcache_hits; 442 int attrcache_misses; 443 int lookupcache_hits; 444 int lookupcache_misses; 445 int direofcache_hits; 446 int direofcache_misses; 447 int accesscache_hits; 448 int accesscache_misses; 449 int biocache_reads; 450 int read_bios; 451 int read_physios; 452 int biocache_writes; 453 int write_bios; 454 int write_physios; 455 int biocache_readlinks; 456 int readlink_bios; 457 int biocache_readdirs; 458 int readdir_bios; 459 int rpccnt[NFSV4_NPROCS]; 460 int rpcretries; 461 int srvrpccnt[NFSV4OP_NOPS + NFSV4OP_FAKENOPS]; 462 int srvrpc_errs; 463 int srv_errs; 464 int rpcrequests; 465 int rpctimeouts; 466 int rpcunexpected; 467 int rpcinvalid; 468 int srvcache_inproghits; 469 int srvcache_idemdonehits; 470 int srvcache_nonidemdonehits; 471 int srvcache_misses; 472 int srvcache_tcppeak; 473 int srvcache_size; 474 int srvclients; 475 int srvopenowners; 476 int srvopens; 477 int srvlockowners; 478 int srvlocks; 479 int srvdelegates; 480 int cbrpccnt[NFSV4OP_CBNOPS]; 481 int clopenowners; 482 int clopens; 483 int cllockowners; 484 int cllocks; 485 int cldelegates; 486 int cllocalopenowners; 487 int cllocalopens; 488 int cllocallockowners; 489 int cllocallocks; 490 }; 491 492 #ifdef _KERNEL 493 /* 494 * Define NFS_NPROCS as NFSV4_NPROCS for the experimental kernel code. 495 */ 496 #ifndef NFS_NPROCS 497 #define NFS_NPROCS NFSV4_NPROCS 498 #endif 499 500 #include <fs/nfs/nfskpiport.h> 501 #include <fs/nfs/nfsdport.h> 502 #include <fs/nfs/rpcv2.h> 503 #include <fs/nfs/nfsproto.h> 504 #include <fs/nfs/nfs.h> 505 #include <fs/nfs/nfsclstate.h> 506 #include <fs/nfs/nfs_var.h> 507 #include <fs/nfs/nfsm_subs.h> 508 #include <fs/nfs/nfsrvcache.h> 509 #include <fs/nfs/nfsrvstate.h> 510 #include <fs/nfs/xdr_subs.h> 511 #include <fs/nfs/nfscl.h> 512 #include <nfsclient/nfsargs.h> 513 #include <fs/nfsclient/nfsmount.h> 514 515 /* 516 * Just to keep nfs_var.h happy. 517 */ 518 struct nfs_vattr { 519 int junk; 520 }; 521 522 struct nfsvattr { 523 struct vattr na_vattr; 524 nfsattrbit_t na_suppattr; 525 u_int64_t na_mntonfileno; 526 u_int64_t na_filesid[2]; 527 }; 528 529 #define na_type na_vattr.va_type 530 #define na_mode na_vattr.va_mode 531 #define na_nlink na_vattr.va_nlink 532 #define na_uid na_vattr.va_uid 533 #define na_gid na_vattr.va_gid 534 #define na_fsid na_vattr.va_fsid 535 #define na_fileid na_vattr.va_fileid 536 #define na_size na_vattr.va_size 537 #define na_blocksize na_vattr.va_blocksize 538 #define na_atime na_vattr.va_atime 539 #define na_mtime na_vattr.va_mtime 540 #define na_ctime na_vattr.va_ctime 541 #define na_gen na_vattr.va_gen 542 #define na_flags na_vattr.va_flags 543 #define na_rdev na_vattr.va_rdev 544 #define na_bytes na_vattr.va_bytes 545 #define na_filerev na_vattr.va_filerev 546 #define na_vaflags na_vattr.va_vaflags 547 548 #include <fs/nfsclient/nfsnode.h> 549 550 /* 551 * This is the header structure used for the lists, etc. (It has the 552 * above record in it. 553 */ 554 struct nfsrv_stablefirst { 555 LIST_HEAD(, nfsrv_stable) nsf_head; /* Head of nfsrv_stable list */ 556 time_t nsf_eograce; /* Time grace period ends */ 557 time_t *nsf_bootvals; /* Previous boottime values */ 558 struct file *nsf_fp; /* File table pointer */ 559 u_char nsf_flags; /* NFSNSF_ flags */ 560 struct nfsf_rec nsf_rec; /* and above first record */ 561 }; 562 #define nsf_lease nsf_rec.lease 563 #define nsf_numboots nsf_rec.numboots 564 565 /* NFSNSF_xxx flags */ 566 #define NFSNSF_UPDATEDONE 0x01 567 #define NFSNSF_GRACEOVER 0x02 568 #define NFSNSF_NEEDLOCK 0x04 569 #define NFSNSF_EXPIREDCLIENT 0x08 570 #define NFSNSF_NOOPENS 0x10 571 #define NFSNSF_OK 0x20 572 573 /* 574 * Maximum number of boot times allowed in record. Although there is 575 * really no need for a fixed upper bound, this serves as a sanity check 576 * for a corrupted file. 577 */ 578 #define NFSNSF_MAXNUMBOOTS 10000 579 580 /* 581 * This structure defines the other records in the file. The 582 * nst_client array is actually the size of the client string name. 583 */ 584 struct nfst_rec { 585 u_int16_t len; 586 u_char flag; 587 u_char client[1]; 588 }; 589 /* and the values for flag */ 590 #define NFSNST_NEWSTATE 0x1 591 #define NFSNST_REVOKE 0x2 592 #define NFSNST_GOTSTATE 0x4 593 #define NFSNST_RECLAIMED 0x8 594 595 /* 596 * This structure is linked onto nfsrv_stablefirst for the duration of 597 * reclaim. 598 */ 599 struct nfsrv_stable { 600 LIST_ENTRY(nfsrv_stable) nst_list; 601 struct nfsclient *nst_clp; 602 struct nfst_rec nst_rec; 603 }; 604 #define nst_timestamp nst_rec.timestamp 605 #define nst_len nst_rec.len 606 #define nst_flag nst_rec.flag 607 #define nst_client nst_rec.client 608 609 /* 610 * At some point the server will run out of kernel storage for 611 * state structures. For FreeBSD5.2, this results in a panic 612 * kmem_map is full. It happens at well over 1000000 opens plus 613 * locks on a PIII-800 with 256Mbytes, so that is where I've set 614 * the limit. If your server panics due to too many opens/locks, 615 * decrease the size of NFSRV_V4STATELIMIT. If you find the server 616 * returning NFS4ERR_RESOURCE a lot and have lots of memory, try 617 * increasing it. 618 */ 619 #define NFSRV_V4STATELIMIT 500000 /* Max # of Opens + Locks */ 620 621 /* 622 * The type required differs with BSDen (just the second arg). 623 */ 624 void nfsrvd_rcv(struct socket *, void *, int); 625 626 /* 627 * Macros for handling socket addresses. (Hopefully this makes the code 628 * more portable, since I've noticed some 'BSD don't have sockaddrs in 629 * mbufs any more.) 630 */ 631 #define NFSSOCKADDR(a, t) ((t)(a)) 632 #define NFSSOCKADDRSIZE(a, s) ((a)->sa_len = (s)) 633 634 /* 635 * These should be defined as a process or thread structure, as required 636 * for signal handling, etc. 637 */ 638 #define NFSNEWCRED(c) (crdup(c)) 639 #define NFSPROCCRED(p) ((p)->td_ucred) 640 #define NFSFREECRED(c) (crfree(c)) 641 #define NFSUIOPROC(u, p) ((u)->uio_td = NULL) 642 #define NFSPROCP(p) ((p)->td_proc) 643 644 /* 645 * Define these so that cn_hash and its length is ignored. 646 */ 647 #define NFSCNHASHZERO(c) 648 #define NFSCNHASH(c, v) 649 #define NCHNAMLEN 9999999 650 651 /* 652 * These macros are defined to initialize and set the timer routine. 653 */ 654 #define NFS_TIMERINIT \ 655 newnfs_timer(NULL) 656 657 /* 658 * Handle SMP stuff: 659 */ 660 #define NFSSTATESPINLOCK extern struct mtx nfs_state_mutex 661 #define NFSLOCKSTATE() mtx_lock(&nfs_state_mutex) 662 #define NFSUNLOCKSTATE() mtx_unlock(&nfs_state_mutex) 663 #define NFSSTATEMUTEXPTR (&nfs_state_mutex) 664 #define NFSREQSPINLOCK extern struct mtx nfs_req_mutex 665 #define NFSLOCKREQ() mtx_lock(&nfs_req_mutex) 666 #define NFSUNLOCKREQ() mtx_unlock(&nfs_req_mutex) 667 #define NFSSOCKMUTEX extern struct mtx nfs_slock_mutex 668 #define NFSSOCKMUTEXPTR (&nfs_slock_mutex) 669 #define NFSLOCKSOCK() mtx_lock(&nfs_slock_mutex) 670 #define NFSUNLOCKSOCK() mtx_unlock(&nfs_slock_mutex) 671 #define NFSNAMEIDMUTEX extern struct mtx nfs_nameid_mutex 672 #define NFSLOCKNAMEID() mtx_lock(&nfs_nameid_mutex) 673 #define NFSUNLOCKNAMEID() mtx_unlock(&nfs_nameid_mutex) 674 #define NFSNAMEIDREQUIRED() mtx_assert(&nfs_nameid_mutex, MA_OWNED) 675 #define NFSCLSTATEMUTEX extern struct mtx nfs_clstate_mutex 676 #define NFSCLSTATEMUTEXPTR (&nfs_clstate_mutex) 677 #define NFSLOCKCLSTATE() mtx_lock(&nfs_clstate_mutex) 678 #define NFSUNLOCKCLSTATE() mtx_unlock(&nfs_clstate_mutex) 679 #define NFSDLOCKMUTEX extern struct mtx newnfsd_mtx 680 #define NFSDLOCKMUTEXPTR (&newnfsd_mtx) 681 #define NFSD_LOCK() mtx_lock(&newnfsd_mtx) 682 #define NFSD_UNLOCK() mtx_unlock(&newnfsd_mtx) 683 #define NFSD_LOCK_ASSERT() mtx_assert(&newnfsd_mtx, MA_OWNED) 684 #define NFSD_UNLOCK_ASSERT() mtx_assert(&newnfsd_mtx, MA_NOTOWNED) 685 #define NFSV4ROOTLOCKMUTEX extern struct mtx nfs_v4root_mutex 686 #define NFSV4ROOTLOCKMUTEXPTR (&nfs_v4root_mutex) 687 #define NFSLOCKV4ROOTMUTEX() mtx_lock(&nfs_v4root_mutex) 688 #define NFSUNLOCKV4ROOTMUTEX() mtx_unlock(&nfs_v4root_mutex) 689 #define NFSLOCKNODE(n) mtx_lock(&((n)->n_mtx)) 690 #define NFSUNLOCKNODE(n) mtx_unlock(&((n)->n_mtx)) 691 #define NFSLOCKMNT(m) mtx_lock(&((m)->nm_mtx)) 692 #define NFSUNLOCKMNT(m) mtx_unlock(&((m)->nm_mtx)) 693 #define NFSLOCKREQUEST(r) mtx_lock(&((r)->r_mtx)) 694 #define NFSUNLOCKREQUEST(r) mtx_unlock(&((r)->r_mtx)) 695 #define NFSLOCKSOCKREQ(r) mtx_lock(&((r)->nr_mtx)) 696 #define NFSUNLOCKSOCKREQ(r) mtx_unlock(&((r)->nr_mtx)) 697 #define NFSLOCKDS(d) mtx_lock(&((d)->nfsclds_mtx)) 698 #define NFSUNLOCKDS(d) mtx_unlock(&((d)->nfsclds_mtx)) 699 #define NFSSESSIONMUTEXPTR(s) (&((s)->mtx)) 700 #define NFSLOCKSESSION(s) mtx_lock(&((s)->mtx)) 701 #define NFSUNLOCKSESSION(s) mtx_unlock(&((s)->mtx)) 702 #define NFSLAYOUTMUTEXPTR(l) (&((l)->mtx)) 703 #define NFSLOCKLAYOUT(l) mtx_lock(&((l)->mtx)) 704 #define NFSUNLOCKLAYOUT(l) mtx_unlock(&((l)->mtx)) 705 #define NFSDDSMUTEXPTR (&nfsrv_dslock_mtx) 706 #define NFSDDSLOCK() mtx_lock(&nfsrv_dslock_mtx) 707 #define NFSDDSUNLOCK() mtx_unlock(&nfsrv_dslock_mtx) 708 #define NFSDDONTLISTMUTEXPTR (&nfsrv_dontlistlock_mtx) 709 #define NFSDDONTLISTLOCK() mtx_lock(&nfsrv_dontlistlock_mtx) 710 #define NFSDDONTLISTUNLOCK() mtx_unlock(&nfsrv_dontlistlock_mtx) 711 #define NFSDRECALLMUTEXPTR (&nfsrv_recalllock_mtx) 712 #define NFSDRECALLLOCK() mtx_lock(&nfsrv_recalllock_mtx) 713 #define NFSDRECALLUNLOCK() mtx_unlock(&nfsrv_recalllock_mtx) 714 715 /* 716 * Use these macros to initialize/free a mutex. 717 */ 718 #define NFSINITSOCKMUTEX(m) mtx_init((m), "nfssock", NULL, MTX_DEF) 719 #define NFSFREEMUTEX(m) mtx_destroy((m)) 720 721 int nfsmsleep(void *, void *, int, const char *, struct timespec *); 722 723 /* 724 * And weird vm stuff in the nfs server. 725 */ 726 #define PDIRUNLOCK 0x0 727 #define MAX_COMMIT_COUNT (1024 * 1024) 728 729 /* 730 * Define these to handle the type of va_rdev. 731 */ 732 #define NFSMAKEDEV(m, n) makedev((m), (n)) 733 #define NFSMAJOR(d) major(d) 734 #define NFSMINOR(d) minor(d) 735 736 /* 737 * The vnode tag for nfsv4root. 738 */ 739 #define VT_NFSV4ROOT "nfsv4root" 740 741 /* 742 * Define whatever it takes to do a vn_rdwr(). 743 */ 744 #define NFSD_RDWR(r, v, b, l, o, s, i, c, a, p) \ 745 vn_rdwr((r), (v), (b), (l), (o), (s), (i), (c), NULL, (a), (p)) 746 747 /* 748 * Macros for handling memory for different BSDen. 749 * NFSBCOPY(src, dst, len) - copies len bytes, non-overlapping 750 * NFSOVBCOPY(src, dst, len) - ditto, but data areas might overlap 751 * NFSBCMP(cp1, cp2, len) - compare len bytes, return 0 if same 752 * NFSBZERO(cp, len) - set len bytes to 0x0 753 */ 754 #define NFSBCOPY(s, d, l) bcopy((s), (d), (l)) 755 #define NFSOVBCOPY(s, d, l) ovbcopy((s), (d), (l)) 756 #define NFSBCMP(s, d, l) bcmp((s), (d), (l)) 757 #define NFSBZERO(s, l) bzero((s), (l)) 758 759 /* 760 * Some queue.h files don't have these dfined in them. 761 */ 762 #define LIST_END(head) NULL 763 #define SLIST_END(head) NULL 764 #define TAILQ_END(head) NULL 765 766 /* 767 * This must be defined to be a global variable that increments once 768 * per second, but never stops or goes backwards, even when a "date" 769 * command changes the TOD clock. It is used for delta times for 770 * leases, etc. 771 */ 772 #define NFSD_MONOSEC time_uptime 773 774 /* 775 * Declare the malloc types. 776 */ 777 MALLOC_DECLARE(M_NEWNFSRVCACHE); 778 MALLOC_DECLARE(M_NEWNFSDCLIENT); 779 MALLOC_DECLARE(M_NEWNFSDSTATE); 780 MALLOC_DECLARE(M_NEWNFSDLOCK); 781 MALLOC_DECLARE(M_NEWNFSDLOCKFILE); 782 MALLOC_DECLARE(M_NEWNFSSTRING); 783 MALLOC_DECLARE(M_NEWNFSUSERGROUP); 784 MALLOC_DECLARE(M_NEWNFSDREQ); 785 MALLOC_DECLARE(M_NEWNFSFH); 786 MALLOC_DECLARE(M_NEWNFSCLOWNER); 787 MALLOC_DECLARE(M_NEWNFSCLOPEN); 788 MALLOC_DECLARE(M_NEWNFSCLDELEG); 789 MALLOC_DECLARE(M_NEWNFSCLCLIENT); 790 MALLOC_DECLARE(M_NEWNFSCLLOCKOWNER); 791 MALLOC_DECLARE(M_NEWNFSCLLOCK); 792 MALLOC_DECLARE(M_NEWNFSDIROFF); 793 MALLOC_DECLARE(M_NEWNFSV4NODE); 794 MALLOC_DECLARE(M_NEWNFSDIRECTIO); 795 MALLOC_DECLARE(M_NEWNFSMNT); 796 MALLOC_DECLARE(M_NEWNFSDROLLBACK); 797 MALLOC_DECLARE(M_NEWNFSLAYOUT); 798 MALLOC_DECLARE(M_NEWNFSFLAYOUT); 799 MALLOC_DECLARE(M_NEWNFSDEVINFO); 800 MALLOC_DECLARE(M_NEWNFSSOCKREQ); 801 MALLOC_DECLARE(M_NEWNFSCLDS); 802 MALLOC_DECLARE(M_NEWNFSLAYRECALL); 803 MALLOC_DECLARE(M_NEWNFSDSESSION); 804 #define M_NFSRVCACHE M_NEWNFSRVCACHE 805 #define M_NFSDCLIENT M_NEWNFSDCLIENT 806 #define M_NFSDSTATE M_NEWNFSDSTATE 807 #define M_NFSDLOCK M_NEWNFSDLOCK 808 #define M_NFSDLOCKFILE M_NEWNFSDLOCKFILE 809 #define M_NFSSTRING M_NEWNFSSTRING 810 #define M_NFSUSERGROUP M_NEWNFSUSERGROUP 811 #define M_NFSDREQ M_NEWNFSDREQ 812 #define M_NFSFH M_NEWNFSFH 813 #define M_NFSCLOWNER M_NEWNFSCLOWNER 814 #define M_NFSCLOPEN M_NEWNFSCLOPEN 815 #define M_NFSCLDELEG M_NEWNFSCLDELEG 816 #define M_NFSCLCLIENT M_NEWNFSCLCLIENT 817 #define M_NFSCLLOCKOWNER M_NEWNFSCLLOCKOWNER 818 #define M_NFSCLLOCK M_NEWNFSCLLOCK 819 #define M_NFSDIROFF M_NEWNFSDIROFF 820 #define M_NFSV4NODE M_NEWNFSV4NODE 821 #define M_NFSDIRECTIO M_NEWNFSDIRECTIO 822 #define M_NFSDROLLBACK M_NEWNFSDROLLBACK 823 #define M_NFSLAYOUT M_NEWNFSLAYOUT 824 #define M_NFSFLAYOUT M_NEWNFSFLAYOUT 825 #define M_NFSDEVINFO M_NEWNFSDEVINFO 826 #define M_NFSSOCKREQ M_NEWNFSSOCKREQ 827 #define M_NFSCLDS M_NEWNFSCLDS 828 #define M_NFSLAYRECALL M_NEWNFSLAYRECALL 829 #define M_NFSDSESSION M_NEWNFSDSESSION 830 831 #define NFSINT_SIGMASK(set) \ 832 (SIGISMEMBER(set, SIGINT) || SIGISMEMBER(set, SIGTERM) || \ 833 SIGISMEMBER(set, SIGHUP) || SIGISMEMBER(set, SIGKILL) || \ 834 SIGISMEMBER(set, SIGQUIT)) 835 836 /* 837 * Convert a quota block count to byte count. 838 */ 839 #define NFSQUOTABLKTOBYTE(q, b) (q) *= (b) 840 841 /* 842 * Define this as the largest file size supported. (It should probably 843 * be available via a VFS_xxx Op, but it isn't. 844 */ 845 #define NFSRV_MAXFILESIZE ((u_int64_t)0x800000000000) 846 847 /* 848 * Set this macro to index() or strchr(), whichever is supported. 849 */ 850 #define STRCHR(s, c) strchr((s), (c)) 851 852 /* 853 * Set the n_time in the client write rpc, as required. 854 */ 855 #define NFSWRITERPC_SETTIME(w, n, a, v4) \ 856 do { \ 857 if (w) { \ 858 mtx_lock(&((n)->n_mtx)); \ 859 (n)->n_mtime = (a)->na_mtime; \ 860 if (v4) \ 861 (n)->n_change = (a)->na_filerev; \ 862 mtx_unlock(&((n)->n_mtx)); \ 863 } \ 864 } while (0) 865 866 /* 867 * Fake value, just to make the client work. 868 */ 869 #define NFS_LATTR_NOSHRINK 1 870 871 /* 872 * Prototypes for functions where the arguments vary for different ports. 873 */ 874 int nfscl_loadattrcache(struct vnode **, struct nfsvattr *, void *, void *, 875 int, int); 876 int newnfs_realign(struct mbuf **, int); 877 878 /* 879 * If the port runs on an SMP box that can enforce Atomic ops with low 880 * overheads, define these as atomic increments/decrements. If not, 881 * don't worry about it, since these are used for stats that can be 882 * "out by one" without disastrous consequences. 883 */ 884 #define NFSINCRGLOBAL(a) ((a)++) 885 886 /* 887 * Assorted funky stuff to make things work under Darwin8. 888 */ 889 /* 890 * These macros checks for a field in vattr being set. 891 */ 892 #define NFSATTRISSET(t, v, a) ((v)->a != (t)VNOVAL) 893 #define NFSATTRISSETTIME(v, a) ((v)->a.tv_sec != VNOVAL) 894 895 /* 896 * Manipulate mount flags. 897 */ 898 #define NFSSTA_HASWRITEVERF 0x00040000 /* Has write verifier */ 899 #define NFSSTA_GOTFSINFO 0x00100000 /* Got the fsinfo */ 900 #define NFSSTA_OPENMODE 0x00200000 /* Must use correct open mode */ 901 #define NFSSTA_FLEXFILE 0x00800000 /* Use Flex File Layout */ 902 #define NFSSTA_NOLAYOUTCOMMIT 0x04000000 /* Don't do LayoutCommit */ 903 #define NFSSTA_SESSPERSIST 0x08000000 /* Has a persistent session */ 904 #define NFSSTA_TIMEO 0x10000000 /* Experiencing a timeout */ 905 #define NFSSTA_LOCKTIMEO 0x20000000 /* Experiencing a lockd timeout */ 906 #define NFSSTA_HASSETFSID 0x40000000 /* Has set the fsid */ 907 #define NFSSTA_PNFS 0x80000000 /* pNFS is enabled */ 908 909 #define NFSHASNFSV3(n) ((n)->nm_flag & NFSMNT_NFSV3) 910 #define NFSHASNFSV4(n) ((n)->nm_flag & NFSMNT_NFSV4) 911 #define NFSHASNFSV4N(n) ((n)->nm_minorvers > 0) 912 #define NFSHASNFSV3OR4(n) ((n)->nm_flag & (NFSMNT_NFSV3 | NFSMNT_NFSV4)) 913 #define NFSHASGOTFSINFO(n) ((n)->nm_state & NFSSTA_GOTFSINFO) 914 #define NFSHASHASSETFSID(n) ((n)->nm_state & NFSSTA_HASSETFSID) 915 #define NFSHASSTRICT3530(n) ((n)->nm_flag & NFSMNT_STRICT3530) 916 #define NFSHASWRITEVERF(n) ((n)->nm_state & NFSSTA_HASWRITEVERF) 917 #define NFSHASINT(n) ((n)->nm_flag & NFSMNT_INT) 918 #define NFSHASSOFT(n) ((n)->nm_flag & NFSMNT_SOFT) 919 #define NFSHASINTORSOFT(n) ((n)->nm_flag & (NFSMNT_INT | NFSMNT_SOFT)) 920 #define NFSHASDUMBTIMR(n) ((n)->nm_flag & NFSMNT_DUMBTIMR) 921 #define NFSHASNOCONN(n) ((n)->nm_flag & NFSMNT_MNTD) 922 #define NFSHASKERB(n) ((n)->nm_flag & NFSMNT_KERB) 923 #define NFSHASALLGSSNAME(n) ((n)->nm_flag & NFSMNT_ALLGSSNAME) 924 #define NFSHASINTEGRITY(n) ((n)->nm_flag & NFSMNT_INTEGRITY) 925 #define NFSHASPRIVACY(n) ((n)->nm_flag & NFSMNT_PRIVACY) 926 #define NFSSETWRITEVERF(n) ((n)->nm_state |= NFSSTA_HASWRITEVERF) 927 #define NFSSETHASSETFSID(n) ((n)->nm_state |= NFSSTA_HASSETFSID) 928 #define NFSHASPNFSOPT(n) ((n)->nm_flag & NFSMNT_PNFS) 929 #define NFSHASNOLAYOUTCOMMIT(n) ((n)->nm_state & NFSSTA_NOLAYOUTCOMMIT) 930 #define NFSHASSESSPERSIST(n) ((n)->nm_state & NFSSTA_SESSPERSIST) 931 #define NFSHASPNFS(n) ((n)->nm_state & NFSSTA_PNFS) 932 #define NFSHASFLEXFILE(n) ((n)->nm_state & NFSSTA_FLEXFILE) 933 #define NFSHASOPENMODE(n) ((n)->nm_state & NFSSTA_OPENMODE) 934 #define NFSHASONEOPENOWN(n) (((n)->nm_flag & NFSMNT_ONEOPENOWN) != 0 && \ 935 (n)->nm_minorvers > 0) 936 937 /* 938 * Gets the stats field out of the mount structure. 939 */ 940 #define vfs_statfs(m) (&((m)->mnt_stat)) 941 942 /* 943 * Set boottime. 944 */ 945 #define NFSSETBOOTTIME(b) (getboottime(&b)) 946 947 /* 948 * The size of directory blocks in the buffer cache. 949 * MUST BE in the range of PAGE_SIZE <= NFS_DIRBLKSIZ <= MAXBSIZE!! 950 */ 951 #define NFS_DIRBLKSIZ (16 * DIRBLKSIZ) /* Must be a multiple of DIRBLKSIZ */ 952 953 /* 954 * Define these macros to access mnt_flag fields. 955 */ 956 #define NFSMNT_RDONLY(m) ((m)->mnt_flag & MNT_RDONLY) 957 #endif /* _KERNEL */ 958 959 /* 960 * Define a structure similar to ufs_args for use in exporting the V4 root. 961 */ 962 struct nfsex_args { 963 char *fspec; 964 struct export_args export; 965 }; 966 967 /* 968 * These export flags should be defined, but there are no bits left. 969 * Maybe a separate mnt_exflag field could be added or the mnt_flag 970 * field increased to 64 bits? 971 */ 972 #ifndef MNT_EXSTRICTACCESS 973 #define MNT_EXSTRICTACCESS 0x0 974 #endif 975 #ifndef MNT_EXV4ONLY 976 #define MNT_EXV4ONLY 0x0 977 #endif 978 979 #ifdef _KERNEL 980 /* 981 * Define this to invalidate the attribute cache for the nfs node. 982 */ 983 #define NFSINVALATTRCACHE(n) ((n)->n_attrstamp = 0) 984 985 /* Used for FreeBSD only */ 986 void nfsd_mntinit(void); 987 988 /* 989 * Define these for vnode lock/unlock ops. 990 * 991 * These are good abstractions to macro out, so that they can be added to 992 * later, for debugging or stats, etc. 993 */ 994 #define NFSVOPLOCK(v, f) vn_lock((v), (f)) 995 #define NFSVOPUNLOCK(v, f) VOP_UNLOCK((v), (f)) 996 #define NFSVOPISLOCKED(v) VOP_ISLOCKED((v)) 997 998 /* 999 * Define ncl_hash(). 1000 */ 1001 #define ncl_hash(f, l) (fnv_32_buf((f), (l), FNV1_32_INIT)) 1002 1003 int newnfs_iosize(struct nfsmount *); 1004 1005 int newnfs_vncmpf(struct vnode *, void *); 1006 1007 #ifndef NFS_MINDIRATTRTIMO 1008 #define NFS_MINDIRATTRTIMO 3 /* VDIR attrib cache timeout in sec */ 1009 #endif 1010 #ifndef NFS_MAXDIRATTRTIMO 1011 #define NFS_MAXDIRATTRTIMO 60 1012 #endif 1013 1014 /* 1015 * Nfs outstanding request list element 1016 */ 1017 struct nfsreq { 1018 TAILQ_ENTRY(nfsreq) r_chain; 1019 u_int32_t r_flags; /* flags on request, see below */ 1020 struct nfsmount *r_nmp; /* Client mnt ptr */ 1021 struct mtx r_mtx; /* Mutex lock for this structure */ 1022 }; 1023 1024 #ifndef NFS_MAXBSIZE 1025 #define NFS_MAXBSIZE (maxbcachebuf) 1026 #endif 1027 1028 /* 1029 * This macro checks to see if issuing of delegations is allowed for this 1030 * vnode. 1031 */ 1032 #ifdef VV_DISABLEDELEG 1033 #define NFSVNO_DELEGOK(v) \ 1034 ((v) == NULL || ((v)->v_vflag & VV_DISABLEDELEG) == 0) 1035 #else 1036 #define NFSVNO_DELEGOK(v) (1) 1037 #endif 1038 1039 /* 1040 * Name used by getnewvnode() to describe filesystem, "nfs". 1041 * For performance reasons it is useful to have the same string 1042 * used in both places that call getnewvnode(). 1043 */ 1044 extern const char nfs_vnode_tag[]; 1045 1046 /* 1047 * Check for the errors that indicate a DS should be disabled. 1048 * ENXIO indicates that the krpc cannot do an RPC on the DS. 1049 * EIO is returned by the RPC as an indication of I/O problems on the 1050 * server. 1051 * Are there other fatal errors? 1052 */ 1053 #define nfsds_failerr(e) ((e) == ENXIO || (e) == EIO) 1054 1055 /* 1056 * Get a pointer to the MDS session, which is always the first element 1057 * in the list. 1058 * This macro can only be safely used when the NFSLOCKMNT() lock is held. 1059 * The inline function can be used when the lock isn't held. 1060 */ 1061 #define NFSMNT_MDSSESSION(m) (&(TAILQ_FIRST(&((m)->nm_sess))->nfsclds_sess)) 1062 1063 static __inline struct nfsclsession * 1064 nfsmnt_mdssession(struct nfsmount *nmp) 1065 { 1066 struct nfsclsession *tsep; 1067 1068 tsep = NULL; 1069 mtx_lock(&nmp->nm_mtx); 1070 if (TAILQ_FIRST(&nmp->nm_sess) != NULL) 1071 tsep = NFSMNT_MDSSESSION(nmp); 1072 mtx_unlock(&nmp->nm_mtx); 1073 return (tsep); 1074 } 1075 1076 #endif /* _KERNEL */ 1077 1078 #endif /* _NFS_NFSPORT_H */ 1079