1 /* $OpenBSD: am.h,v 1.12 2009/10/27 23:59:51 deraadt Exp $ */ 2 3 /* 4 * Copyright (c) 1990 Jan-Simon Pendry 5 * Copyright (c) 1990 Imperial College of Science, Technology & Medicine 6 * Copyright (c) 1990, 1993 7 * The Regents of the University of California. All rights reserved. 8 * 9 * This code is derived from software contributed to Berkeley by 10 * Jan-Simon Pendry at Imperial College, London. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * from: @(#)am.h 5.6 (Berkeley) 6/6/93 37 */ 38 39 #include "config.h" 40 41 /* 42 * Global declarations 43 */ 44 #include <sys/param.h> 45 #include <sys/socket.h> 46 #include <rpc/rpc.h> 47 #include <sys/mount.h> 48 #include <string.h> 49 #include <stdlib.h> 50 #ifdef MNTENT_HDR 51 #include MNTENT_HDR 52 #endif /* MNTENT_HDR */ 53 #ifndef NFS_PROTOCOL_VERSION 54 #if NFS_ARGSVERSION >= 3 55 #define NFS_PROTOCOL_VERSION 3 56 #endif /* NFS_ARGSVERSION >= 3 */ 57 #endif /* NFS_PROTOCOL_VERSION */ 58 #include "nfs_prot.h" 59 #include <assert.h> 60 61 #ifdef DEBUG_MEM 62 #include <malloc.h> 63 #endif /* DEBUG_MEM */ 64 65 #ifndef MAXHOSTNAMELEN 66 #define MAXHOSTNAMELEN 64 67 #endif /* MAXHOSTNAMELEN */ 68 69 #ifndef MNTTYPE_AUTO 70 #define MNTTYPE_AUTO "auto" 71 #endif /* MNTTYPE_AUTO */ 72 73 #ifndef FALSE 74 #define FALSE 0 75 #define TRUE 1 76 #endif /* FALSE */ 77 78 #ifndef ROOT_MAP 79 #define ROOT_MAP "\"root\"" 80 #endif /* ROOT_MAP */ 81 82 /* 83 * Flags from command line 84 */ 85 extern int print_pid; /* Print pid to stdout */ 86 extern int normalize_hosts; /* Normalize host names before use */ 87 extern int restart_existing_mounts; 88 #ifdef HAS_NIS_MAPS 89 extern char *domain; /* NIS domain to use */ 90 #endif /* HAS_NIS_MAPS */ 91 extern int am_timeo; /* Cache period */ 92 extern int afs_timeo; /* AFS timeout */ 93 extern int afs_retrans; /* AFS retrans */ 94 extern int am_timeo_w; /* Unmount timeout */ 95 extern char *mtab; /* Mount table */ 96 97 typedef enum { 98 Start, 99 Run, 100 Finishing, 101 Quit, 102 Done 103 } serv_state; 104 105 extern serv_state amd_state; /* Should we go now */ 106 extern int immediate_abort; /* Should close-down unmounts be retried */ 107 extern time_t do_mapc_reload; /* Flush & reload mount map cache */ 108 109 /* 110 * Useful constants 111 */ 112 extern char pid_fsname[]; /* kiska.southseas.nz:(pid%d) */ 113 extern char hostd[]; /* "kiska.southseas.nz" */ 114 extern char *hostdomain; /* "southseas.nz" */ 115 extern char *op_sys; /* "sos4" */ 116 extern char *arch; /* "sun4" */ 117 extern char *karch; /* "sun4c" */ 118 extern char *cluster; /* "r+d-kluster" */ 119 extern char *endian; /* "big" */ 120 extern char *auto_dir; /* "/a" */ 121 extern char version[]; /* Version info */ 122 123 typedef struct am_ops am_ops; 124 typedef struct am_node am_node; 125 typedef struct am_opts am_opts; 126 typedef struct mntfs mntfs; 127 typedef struct fserver fserver; 128 typedef struct fsrvinfo fsrvinfo; 129 130 /* 131 * Debug defns. 132 */ 133 #ifdef DEBUG 134 #define DEBUG_MTAB "./mtab" 135 136 extern int debug_flags; /* Debug options */ 137 138 #define D_DAEMON 0x0001 /* Enter daemon mode */ 139 #define D_TRACE 0x0002 /* Do protocol trace */ 140 #define D_FULL 0x0004 /* Do full trace */ 141 #define D_MTAB 0x0008 /* Use local mtab */ 142 #define D_AMQ 0x0010 /* Register amq program */ 143 #define D_STR 0x0020 /* Debug string munging */ 144 #define D_MEM 0x0040 /* Trace memory allocations */ 145 146 /* 147 * Normally, don't enter daemon mode, and don't register amq 148 */ 149 #define D_TEST (~(D_DAEMON|D_MEM|D_STR)) 150 #endif /* DEBUG */ 151 152 /* 153 * Global variables. 154 */ 155 extern unsigned short nfs_port; /* Our NFS service port */ 156 extern struct in_addr myipaddr; /* (An) IP address of this host */ 157 158 extern int foreground; /* Foreground process */ 159 extern time_t next_softclock; /* Time to call softclock() */ 160 extern int task_notify_todo; /* Task notifier needs running */ 161 #ifdef HAS_TFS 162 extern int nfs_server_code_available; 163 #endif /* HAS_TFS */ 164 extern int last_used_map; /* Last map being used for mounts */ 165 extern AUTH *nfs_auth; /* Dummy uthorisation for remote servers */ 166 extern am_node **exported_ap; /* List of nodes */ 167 extern int first_free_map; /* First free node */ 168 extern am_node *root_node; /* Node for "root" */ 169 extern char *wire; /* Name of primary connected network */ 170 #define NEXP_AP (254) 171 #define NEXP_AP_MARGIN (128) 172 173 typedef int (*task_fun)(void *); 174 typedef void (*cb_fun)(int, int, void *); 175 typedef void (*fwd_fun)(void *, int, struct sockaddr_in *, 176 struct sockaddr_in *, void *, int); 177 178 /* 179 * String comparison macros 180 */ 181 #define STREQ(s1, s2) (strcmp((s1), (s2)) == 0) 182 #define FSTREQ(s1, s2) ((*(s1) == *(s2)) && STREQ((s1),(s2))) 183 184 /* 185 * Linked list 186 */ 187 typedef struct qelem qelem; 188 struct qelem { 189 qelem *q_forw; 190 qelem *q_back; 191 }; 192 #define FIRST(ty, q) ((ty *) ((q)->q_forw)) 193 #define LAST(ty, q) ((ty *) ((q)->q_back)) 194 #define NEXT(ty, q) ((ty *) (((qelem *) q)->q_forw)) 195 #define PREV(ty, q) ((ty *) (((qelem *) q)->q_back)) 196 #define HEAD(ty, q) ((ty *) q) 197 #define ITER(v, ty, q) \ 198 for ((v) = FIRST(ty,(q)); (v) != HEAD(ty,(q)); (v) = NEXT(ty,(v))) 199 200 /* 201 * List of mount table entries 202 */ 203 typedef struct mntlist mntlist; 204 struct mntlist { 205 struct mntlist *mnext; 206 struct mntent *mnt; 207 }; 208 209 /* 210 * Mount map 211 */ 212 typedef struct mnt_map mnt_map; 213 214 struct fhstatus; 215 216 /* 217 * Global routines 218 */ 219 extern void am_mounted(am_node *); 220 extern void am_unmounted(am_node *); 221 extern pid_t background(void); 222 extern int bind_resv_port(int, unsigned short *); 223 extern int compute_mount_flags(struct mntent *); 224 extern int softclock(void); 225 #ifdef DEBUG 226 extern int debug_option(char *); 227 #endif /* DEBUG */ 228 extern void deslashify(char *); 229 extern void discard_mntlist(mntlist *mp); 230 /*extern void domain_strip(char *, char *);*/ 231 extern mntfs *dup_mntfs(mntfs *); 232 extern fserver *dup_srvr(fserver*); 233 extern int eval_fs_opts(am_opts *, char *, char *, char *, char *, char *); 234 extern char *expand_key(char *); 235 extern am_node *exported_ap_alloc(void); 236 extern am_node *find_ap(char *); 237 extern am_node *find_mf(mntfs *); 238 extern mntfs *find_mntfs(am_ops *, am_opts *, char *, char *, char *, 239 char *, char *); 240 extern void flush_mntfs(void); 241 extern void flush_nfs_fhandle_cache(fserver *); 242 extern void flush_srvr_nfs_cache(void); 243 extern void forcibly_timeout_mp(am_node *); 244 extern void free_mntfs(mntfs *); 245 extern void free_opts(am_opts *); 246 extern void free_map(am_node *); 247 extern void free_mntlist(mntlist *); 248 extern void free_srvr(fserver *); 249 extern int fwd_init(void); 250 extern int fwd_packet(int, void *, int, struct sockaddr_in *, 251 struct sockaddr_in *, void *, fwd_fun); 252 extern void fwd_reply(void); 253 extern void get_args(int, char *[]); 254 extern char *getwire(void); 255 #ifdef NEED_MNTOPT_PARSER 256 extern char *hasmntopt(struct mntent *, char *); 257 #endif /* NEED_MNTOPT_PARSER */ 258 extern int hasmntval(struct mntent *, char *); 259 extern void host_normalize(char **); 260 extern char *inet_dquad(char *, size_t, u_int32_t); 261 extern void init_map(am_node *, char *); 262 extern void insert_am(am_node *, am_node *); 263 extern void ins_que(qelem *, qelem *); 264 extern int islocalnet(in_addr_t); 265 extern int make_nfs_auth(void); 266 extern void make_root_node(void); 267 extern int make_rpc_packet(char *, int, u_long, struct rpc_msg *, 268 void *, xdrproc_t, AUTH *); 269 extern void map_flush_srvr(fserver *); 270 extern void mapc_add_kv(mnt_map *, char *, char *); 271 extern mnt_map *mapc_find(char *, char *); 272 extern void mapc_free(mnt_map *); 273 extern int mapc_keyiter(mnt_map*, void (*)(char *,void *), void *); 274 extern int mapc_search(mnt_map *, char *, char **); 275 extern void mapc_reload(void); 276 extern void mapc_showtypes(FILE *); 277 extern void mf_mounted(mntfs *mf); 278 extern int mkdirs(char *, int); 279 extern void mk_fattr(am_node *, int); 280 extern void mnt_free(struct mntent *); 281 extern int mount_auto_node(char *, void *); 282 extern int mount_automounter(pid_t); 283 extern int mount_exported(void); 284 extern int mount_fs(struct mntent *, int, caddr_t, int, MTYPE_TYPE); 285 extern int mount_nfs_fh(struct fhstatus *, char *, char *, char *, mntfs *); 286 extern int mount_node(am_node *); 287 extern mntfs *new_mntfs(void); 288 extern void new_ttl(am_node *); 289 extern am_node *next_map(int *); 290 extern int nfs_srvr_port(fserver *, u_short *, void *); 291 extern void normalize_slash(char *); 292 extern void ops_showfstypes(FILE *); 293 extern int pickup_rpc_reply(void *, int, void *, xdrproc_t); 294 extern mntlist *read_mtab(char *); 295 extern mntfs *realloc_mntfs(mntfs *, am_ops *, am_opts *, char *, 296 char *, char *, char *, char *); 297 extern void rem_que(qelem *); 298 extern void reschedule_timeout_mp(void); 299 extern void restart(void); 300 #ifdef UPDATE_MTAB 301 extern void rewrite_mtab(mntlist *); 302 #endif /* UPDATE_MTAB */ 303 extern void rmdirs(char *); 304 extern am_node *root_ap(char *, int); 305 extern int root_keyiter(void (*)(char *,void *), void *); 306 extern void root_newmap(char *, char *, char *); 307 extern void rpc_msg_init(struct rpc_msg *, u_long, u_long, u_long); 308 extern void run_task(task_fun, void *, cb_fun, void *); 309 extern void sched_task(cb_fun, void *, void *); 310 extern void show_rcs_info(const char *, char *); 311 extern void sigchld(int); 312 extern void srvrlog(fserver *, char *); 313 extern char *str3cat(char *, char *, char *, char *); 314 extern char *strnsave(const char *, int); 315 extern char *strealloc(char *, char *); 316 extern char **strsplit(char *, int, int); 317 extern int switch_option(char *); 318 extern int switch_to_logfile(char *); 319 extern void do_task_notify(void); 320 extern int timeout(unsigned int, void (*fn)(), void *); 321 extern void timeout_mp(void); 322 extern void umount_exported(void); 323 extern int umount_fs(char *); 324 /*extern int unmount_node(am_node*); 325 extern int unmount_node_wrap(void *);*/ 326 extern void unregister_amq(void); 327 extern void untimeout(int); 328 extern int valid_key(char *); 329 extern void wakeup(void *); 330 extern void wakeup_task(int, int, void *); 331 extern void wakeup_srvr(fserver *); 332 extern void write_mntent(struct mntent *); 333 #ifdef UPDATE_MTAB 334 extern void unlock_mntlist(void); 335 #else 336 #define unlock_mntlist() 337 #endif /* UPDATE_MTAB */ 338 339 340 #define ALLOC(ty) ((struct ty *) xmalloc(sizeof(struct ty))) 341 342 /* 343 * Options 344 */ 345 struct am_opts { 346 char *fs_glob; /* Smashed copy of global options */ 347 char *fs_local; /* Expanded copy of local options */ 348 char *fs_mtab; /* Mount table entry */ 349 /* Other options ... */ 350 char *opt_dev; 351 char *opt_delay; 352 char *opt_dir; 353 char *opt_fs; 354 char *opt_group; 355 char *opt_mount; 356 char *opt_opts; 357 char *opt_remopts; 358 char *opt_pref; 359 char *opt_cache; 360 char *opt_rfs; 361 char *opt_rhost; 362 char *opt_sublink; 363 char *opt_type; 364 char *opt_unmount; 365 char *opt_user; 366 }; 367 368 /* 369 * File Handle 370 * 371 * This is interpreted by indexing the exported array 372 * by fhh_id. 373 * 374 * The whole structure is mapped onto a standard fhandle_t 375 * when transmitted. 376 */ 377 struct am_fh { 378 int fhh_pid; /* process id */ 379 int fhh_id; /* map id */ 380 int fhh_gen; /* generation number */ 381 }; 382 383 extern am_node *fh_to_mp(nfs_fh *); 384 extern am_node *fh_to_mp3(nfs_fh *, int *, int); 385 extern void mp_to_fh(am_node *, nfs_fh *); 386 #define fh_to_mp2(fhp, rp) fh_to_mp3(fhp, rp, VLOOK_CREATE) 387 extern int auto_fmount(am_node *mp); 388 extern int auto_fumount(am_node *mp); 389 390 #define MAX_READDIR_ENTRIES 16 391 392 typedef char *(*vfs_match)(am_opts *); 393 typedef int (*vfs_init)(mntfs *); 394 typedef int (*vmount_fs)(am_node *); 395 typedef int (*vfmount_fs)(mntfs *); 396 typedef int (*vumount_fs)(am_node *); 397 typedef int (*vfumount_fs)(mntfs *); 398 typedef am_node *(*vlookuppn)(am_node *, char *, int *, int); 399 typedef int (*vreaddir)(am_node *, nfscookie, dirlist *, entry *, int); 400 typedef am_node *(*vreadlink)(am_node *, int *); 401 typedef void (*vmounted)(mntfs *); 402 typedef void (*vumounted)(am_node *); 403 typedef fserver *(*vffserver)(mntfs *); 404 405 struct am_ops { 406 char *fs_type; 407 vfs_match fs_match; 408 vfs_init fs_init; 409 vmount_fs mount_fs; 410 vfmount_fs fmount_fs; 411 vumount_fs umount_fs; 412 vfumount_fs fumount_fs; 413 vlookuppn lookuppn; 414 vreaddir readdir; 415 vreadlink readlink; 416 vmounted mounted; 417 vumounted umounted; 418 vffserver ffserver; 419 int fs_flags; 420 }; 421 extern am_node *efs_lookuppn(am_node *, char *, int *, int); 422 extern int efs_readdir(am_node *, nfscookie, dirlist *, entry *, int); 423 424 #define VLOOK_CREATE 0x1 425 #define VLOOK_DELETE 0x2 426 427 #define FS_DIRECTORY 0x0001 /* This looks like a dir, not a link */ 428 #define FS_MBACKGROUND 0x0002 /* Should background this mount */ 429 #define FS_NOTIMEOUT 0x0004 /* Don't bother with timeouts */ 430 #define FS_MKMNT 0x0008 /* Need to make the mount point */ 431 #define FS_UBACKGROUND 0x0010 /* Unmount in background */ 432 #define FS_BACKGROUND (FS_MBACKGROUND|FS_UBACKGROUND) 433 #define FS_DISCARD 0x0020 /* Discard immediately on last reference */ 434 #define FS_AMQINFO 0x0040 /* Amq is interested in this fs type */ 435 436 #ifdef SUNOS4_COMPAT 437 extern am_ops *sunos4_match(am_opts *, char *, char *, char *, char *, char *); 438 #endif /* SUNOS4_COMPAT */ 439 extern am_ops *ops_match(am_opts *, char *, char *, char *, char *, char *); 440 #include "fstype.h" 441 442 /* 443 * Per-mountpoint statistics 444 */ 445 struct am_stats { 446 time_t s_mtime; /* Mount time */ 447 u_short s_uid; /* Uid of mounter */ 448 int s_getattr; /* Count of getattrs */ 449 int s_lookup; /* Count of lookups */ 450 int s_readdir; /* Count of readdirs */ 451 int s_readlink; /* Count of readlinks */ 452 int s_statfs; /* Count of statfs */ 453 }; 454 typedef struct am_stats am_stats; 455 456 /* 457 * System statistics 458 */ 459 struct amd_stats { 460 int d_drops; /* Dropped requests */ 461 int d_stale; /* Stale NFS handles */ 462 int d_mok; /* Successful mounts */ 463 int d_merr; /* Failed mounts */ 464 int d_uerr; /* Failed unmounts */ 465 }; 466 extern struct amd_stats amd_stats; 467 468 /* 469 * List of fileservers 470 */ 471 struct fserver { 472 qelem fs_q; /* List of fileservers */ 473 int fs_refc; /* Number of references to this node */ 474 char *fs_host; /* Normalized hostname of server */ 475 struct sockaddr_in *fs_ip; /* Network address of server */ 476 int fs_cid; /* Callout id */ 477 int fs_pinger; /* Ping (keepalive) interval */ 478 int fs_flags; /* Flags */ 479 char *fs_type; /* File server type */ 480 void *fs_private; /* Private data */ 481 void (*fs_prfree)(); /* Free private data */ 482 }; 483 #define FSF_VALID 0x0001 /* Valid information available */ 484 #define FSF_DOWN 0x0002 /* This fileserver is thought to be down */ 485 #define FSF_ERROR 0x0004 /* Permanent error has occured */ 486 #define FSF_WANT 0x0008 /* Want a wakeup call */ 487 #define FSF_PINGING 0x0010 /* Already doing pings */ 488 #define FSRV_ISDOWN(fs) (((fs)->fs_flags & (FSF_DOWN|FSF_VALID)) == (FSF_DOWN|FSF_VALID)) 489 #define FSRV_ISUP(fs) (((fs)->fs_flags & (FSF_DOWN|FSF_VALID)) == (FSF_VALID)) 490 491 /* 492 * List of mounted filesystems 493 */ 494 struct mntfs { 495 qelem mf_q; /* List of mounted filesystems */ 496 am_ops *mf_ops; /* Operations on this mountpoint */ 497 am_opts *mf_fo; /* File opts */ 498 char *mf_mount; /* "/a/kiska/home/kiska" */ 499 char *mf_info; /* Mount info */ 500 char *mf_auto; /* Automount opts */ 501 char *mf_mopts; /* FS mount opts */ 502 char *mf_remopts; /* Remote FS mount opts */ 503 fserver *mf_server; /* File server */ 504 int mf_flags; /* Flags */ 505 int mf_error; /* Error code from background mount */ 506 int mf_refc; /* Number of references to this node */ 507 int mf_cid; /* Callout id */ 508 void (*mf_prfree)(); /* Free private space */ 509 void *mf_private; /* Private - per-fs data */ 510 }; 511 512 #define MFF_MOUNTED 0x0001 /* Node is mounted */ 513 #define MFF_MOUNTING 0x0002 /* Mount is in progress */ 514 #define MFF_UNMOUNTING 0x0004 /* Unmount is in progress */ 515 #define MFF_RESTART 0x0008 /* Restarted node */ 516 #define MFF_MKMNT 0x0010 /* Delete this node's am_mount */ 517 #define MFF_ERROR 0x0020 /* This node failed to mount */ 518 #define MFF_LOGDOWN 0x0040 /* Logged that this mount is down */ 519 #define MFF_RSTKEEP 0x0080 /* Don't timeout this filesystem - restarted */ 520 #define MFF_WANTTIMO 0x0100 /* Need a timeout call when not busy */ 521 522 /* 523 * Map of auto-mount points. 524 */ 525 struct am_node { 526 int am_mapno; /* Map number */ 527 mntfs *am_mnt; /* Mounted filesystem */ 528 char *am_name; /* "kiska" 529 Name of this node */ 530 char *am_path; /* "/home/kiska" 531 Path of this node's mount point */ 532 char *am_link; /* "/a/kiska/home/kiska/this/that" 533 Link to sub-directory */ 534 am_node *am_parent, /* Parent of this node */ 535 *am_ysib, /* Younger sibling of this node */ 536 *am_osib, /* Older sibling of this node */ 537 *am_child; /* First child of this node */ 538 struct attrstat am_attr; /* File attributes */ 539 #define am_fattr am_attr.attrstat_u.attributes 540 int am_flags; /* Boolean flags */ 541 int am_error; /* Specific mount error */ 542 time_t am_ttl; /* Time to live */ 543 int am_timeo_w; /* Wait interval */ 544 int am_timeo; /* Timeout interval */ 545 unsigned int am_gen; /* Generation number */ 546 char *am_pref; /* Mount info prefix */ 547 am_stats am_stats; /* Statistics gathering */ 548 }; 549 550 #define AMF_NOTIMEOUT 0x0001 /* This node never times out */ 551 #define AMF_ROOT 0x0002 /* This is a root node */ 552 553 #define ONE_HOUR (60 * 60) /* One hour in seconds */ 554 555 /* 556 * The following values can be tuned... 557 */ 558 #define ALLOWED_MOUNT_TIME 40 /* 40s for a mount */ 559 #define AM_TTL (5 * 60) /* Default cache period */ 560 #define AM_TTL_W (2 * 60) /* Default unmount interval */ 561 #define AM_PINGER 30 /* NFS ping interval for live systems */ 562 #define AFS_TIMEO 8 /* Default afs timeout - .8s */ 563 #define AFS_RETRANS ((ALLOWED_MOUNT_TIME*10+5*afs_timeo)/afs_timeo * 2) 564 /* Default afs retrans - 1/10th seconds */ 565 566 #define RPC_XID_PORTMAP 0 567 #define RPC_XID_MOUNTD 1 568 #define RPC_XID_NFSPING 2 569 #define RPC_XID_MASK (0x0f) /* 16 id's for now */ 570 #define MK_RPC_XID(type_id, uniq) ((type_id) | ((uniq) << 4)) 571