1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489
|
/*
* QUOTA An implementation of the diskquota system for the LINUX operating
* system. QUOTA is implemented using the BSD systemcall interface
* as the means of communication with the user level. Should work for
* all filesystems because of integration into the VFS layer of the
* operating system. This is based on the Melbourne quota system wich
* uses both user and group quota files.
*
* Rquota service handlers.
*
* Author: Marco van Wieringen <mvw@planets.elm.net>
* changes for new utilities by Jan Kara <jack@suse.cz>
* patches by Jani Jaakkola <jjaakkol@cs.helsinki.fi>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*/
#include "config.h"
#include <rpc/rpc.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <rpc/pmap_clnt.h> /* for pmap_unset */
#include <stdio.h>
#include <stdlib.h> /* getenv, exit */
#include <string.h> /* strcmp */
#include <memory.h>
#include <unistd.h>
#include <getopt.h>
#include <signal.h>
#include <errno.h>
#ifdef HOSTS_ACCESS
#include <tcpd.h>
#include <netdb.h>
int deny_severity, allow_severity; /* Needed by some versions of libwrap */
#endif
#ifdef __STDC__
#define SIG_PF void(*)(int)
#endif
extern int svctcp_socket (u_long __number, int __port, int __reuse);
extern int svcudp_socket (u_long __number, int __port, int __reuse);
#include "pot.h"
#include "common.h"
#include "rquota.h"
#include "quotasys.h"
char *progname;
/*
* Global authentication credentials.
*/
struct authunix_parms *unix_cred;
#define FL_SETQUOTA 1 /* Enable setquota rpc */
#define FL_NODAEMON 2 /* Disable daemon() call */
#define FL_AUTOFS 4 /* Don't ignore autofs mountpoints */
int flags; /* Options specified on command line */
static int port; /* Port to use (0 for default one) */
static char xtab_path[PATH_MAX]; /* Path to NFSD export table */
char nfs_pseudoroot[PATH_MAX]; /* Root of the virtual NFS filesystem ('/' for NFSv3) */
static struct option options[]= {
{ "version", 0, NULL, 'V' },
{ "help", 0, NULL, 'h' },
{ "foreground", 0 , NULL, 'F' },
#ifdef RPC_SETQUOTA
{ "no-setquota", 0 , NULL, 's' },
{ "setquota", 0, NULL, 'S' },
#endif
{ "autofs", 0, NULL, 'I'},
{ "port", 1, NULL, 'p' },
{ "xtab", 1, NULL, 'x' },
{ NULL, 0, NULL , 0 }
};
static void show_help(void)
{
#ifdef RPC_SETQUOTA
errstr(_("Usage: %s [options]\nOptions are:\n\
-h --help shows this text\n\
-V --version shows version information\n\
-F --foreground starts the quota service in foreground\n\
-I --autofs do not ignore mountpoints mounted by automounter\n\
-p --port <port> listen on given port\n\
-s --no-setquota disables remote calls to setquota (default)\n\
-S --setquota enables remote calls to setquota\n\
-x --xtab <path> set an alternative file with NFSD export table\n"), progname);
#else
errstr(_("Usage: %s [options]\nOptions are:\n\
-h --help shows this text\n\
-V --version shows version information\n\
-F --foreground starts the quota service in foreground\n\
-I --autofs do not ignore mountpoints mounted by automounter\n\
-p --port <port> listen on given port\n\
-x --xtab <path> set an alternative file with NFSD export table\n"), progname);
#endif
}
static void parse_options(int argc, char **argv)
{
char ostr[128]="", *endptr;
int i,opt;
int j=0;
sstrncpy(xtab_path, NFSD_XTAB_PATH, PATH_MAX);
for(i=0; options[i].name; i++) {
ostr[j++] = options[i].val;
if (options[i].has_arg)
ostr[j++] = ':';
}
while ((opt=getopt_long(argc, argv, ostr, options, NULL))>=0) {
switch(opt) {
case 'V':
version();
exit(0);
case 'h':
show_help();
exit(0);
case 'F':
flags |= FL_NODAEMON;
break;
#ifdef RPC_SETQUOTA
case 's':
flags &= ~FL_SETQUOTA;
break;
case 'S':
flags |= FL_SETQUOTA;
break;
#endif
case 'I':
flags |= FL_AUTOFS;
break;
case 'p':
port = strtol(optarg, &endptr, 0);
if (*endptr || port <= 0) {
errstr(_("Illegal port number: %s\n"), optarg);
show_help();
exit(1);
}
break;
case 'x':
if (access(optarg, R_OK) < 0) {
errstr(_("Cannot access the specified xtab file %s: %s\n"), optarg, strerror(errno));
show_help();
exit(1);
}
sstrncpy(xtab_path, optarg, PATH_MAX);
break;
default:
errstr(_("Unknown option '%c'.\n"), opt);
show_help();
exit(1);
}
}
}
/*
* good_client checks if an quota client should be allowed to
* execute the requested rpc call.
*/
static int good_client(struct sockaddr_in *addr, ulong rq_proc)
{
#ifdef HOSTS_ACCESS
struct request_info req;
#endif
char *remote = inet_ntoa(addr->sin_addr);
if (rq_proc==RQUOTAPROC_SETQUOTA ||
rq_proc==RQUOTAPROC_SETACTIVEQUOTA) {
/* If setquota is disabled, fail always */
if (!(flags & FL_SETQUOTA)) {
errstr(_("host %s attempted to call setquota when disabled\n"),
remote);
return 0;
}
/* Require that SETQUOTA calls originate from port < 1024 */
if (ntohs(addr->sin_port)>=1024) {
errstr(_("host %s attempted to call setquota from port >= 1024\n"),
remote);
return 0;
}
/* Setquota OK */
}
#ifdef HOSTS_ACCESS
/* NOTE: we could use different servicename for setquota calls to
* allow only some hosts to call setquota. */
request_init(&req, RQ_DAEMON, "rquotad", RQ_CLIENT_SIN, addr, 0);
sock_methods(&req);
if (hosts_access(&req))
return 1;
errstr(_("Denied access to host %s\n"), remote);
return 0;
#else
/* If no access checking is available, OK always */
return 1;
#endif
}
static void rquotaprog_1(struct svc_req *rqstp, register SVCXPRT * transp)
{
union {
getquota_args rquotaproc_getquota_1_arg;
setquota_args rquotaproc_setquota_1_arg;
getquota_args rquotaproc_getactivequota_1_arg;
setquota_args rquotaproc_setactivequota_1_arg;
} argument;
char *result;
xdrproc_t xdr_argument, xdr_result;
char *(*local) (char *, struct svc_req *);
/*
* Authenticate host
*/
if (!good_client(svc_getcaller(rqstp->rq_xprt),rqstp->rq_proc)) {
svcerr_auth (transp, AUTH_FAILED);
return;
}
/*
* Don't bother authentication for NULLPROC.
*/
if (rqstp->rq_proc == NULLPROC) {
(void)svc_sendreply(transp, (xdrproc_t) xdr_void, (char *)NULL);
return;
}
/*
* Get authentication.
*/
switch (rqstp->rq_cred.oa_flavor) {
case AUTH_UNIX:
unix_cred = (struct authunix_parms *)rqstp->rq_clntcred;
break;
case AUTH_NULL:
default:
svcerr_weakauth(transp);
return;
}
switch (rqstp->rq_proc) {
case RQUOTAPROC_GETQUOTA:
xdr_argument = (xdrproc_t) xdr_getquota_args;
xdr_result = (xdrproc_t) xdr_getquota_rslt;
local = (char *(*)(char *, struct svc_req *))rquotaproc_getquota_1_svc;
break;
case RQUOTAPROC_SETQUOTA:
xdr_argument = (xdrproc_t) xdr_setquota_args;
xdr_result = (xdrproc_t) xdr_setquota_rslt;
local = (char *(*)(char *, struct svc_req *))rquotaproc_setquota_1_svc;
break;
case RQUOTAPROC_GETACTIVEQUOTA:
xdr_argument = (xdrproc_t) xdr_getquota_args;
xdr_result = (xdrproc_t) xdr_getquota_rslt;
local = (char *(*)(char *, struct svc_req *))rquotaproc_getactivequota_1_svc;
break;
case RQUOTAPROC_SETACTIVEQUOTA:
xdr_argument = (xdrproc_t) xdr_setquota_args;
xdr_result = (xdrproc_t) xdr_setquota_rslt;
local = (char *(*)(char *, struct svc_req *))rquotaproc_setactivequota_1_svc;
break;
default:
svcerr_noproc(transp);
return;
}
memset(&argument, 0, sizeof(argument));
if (!svc_getargs(transp, xdr_argument, (caddr_t) & argument)) {
svcerr_decode(transp);
return;
}
result = (*local) ((char *)&argument, rqstp);
if (result != NULL && !svc_sendreply(transp, xdr_result, result)) {
svcerr_systemerr(transp);
}
if (!svc_freeargs(transp, xdr_argument, (caddr_t) & argument)) {
errstr(_("unable to free arguments\n"));
exit(1);
}
return;
}
static void rquotaprog_2(struct svc_req *rqstp, register SVCXPRT * transp)
{
union {
ext_getquota_args rquotaproc_getquota_2_arg;
ext_setquota_args rquotaproc_setquota_2_arg;
ext_getquota_args rquotaproc_getactivequota_2_arg;
ext_setquota_args rquotaproc_setactivequota_2_arg;
} argument;
char *result;
xdrproc_t xdr_argument, xdr_result;
char *(*local) (char *, struct svc_req *);
/*
* Authenticate host
*/
if (!good_client(svc_getcaller(rqstp->rq_xprt),rqstp->rq_proc)) {
svcerr_auth (transp, AUTH_FAILED);
return;
}
/*
* Don't bother authentication for NULLPROC.
*/
if (rqstp->rq_proc == NULLPROC) {
(void)svc_sendreply(transp, (xdrproc_t) xdr_void, (char *)NULL);
return;
}
/*
* Get authentication.
*/
switch (rqstp->rq_cred.oa_flavor) {
case AUTH_UNIX:
unix_cred = (struct authunix_parms *)rqstp->rq_clntcred;
break;
case AUTH_NULL:
default:
svcerr_weakauth(transp);
return;
}
switch (rqstp->rq_proc) {
case RQUOTAPROC_GETQUOTA:
xdr_argument = (xdrproc_t) xdr_ext_getquota_args;
xdr_result = (xdrproc_t) xdr_getquota_rslt;
local = (char *(*)(char *, struct svc_req *))rquotaproc_getquota_2_svc;
break;
case RQUOTAPROC_SETQUOTA:
xdr_argument = (xdrproc_t) xdr_ext_setquota_args;
xdr_result = (xdrproc_t) xdr_setquota_rslt;
local = (char *(*)(char *, struct svc_req *))rquotaproc_setquota_2_svc;
break;
case RQUOTAPROC_GETACTIVEQUOTA:
xdr_argument = (xdrproc_t) xdr_ext_getquota_args;
xdr_result = (xdrproc_t) xdr_getquota_rslt;
local = (char *(*)(char *, struct svc_req *))rquotaproc_getactivequota_2_svc;
break;
case RQUOTAPROC_SETACTIVEQUOTA:
xdr_argument = (xdrproc_t) xdr_ext_setquota_args;
xdr_result = (xdrproc_t) xdr_setquota_rslt;
local = (char *(*)(char *, struct svc_req *))rquotaproc_setactivequota_2_svc;
break;
default:
svcerr_noproc(transp);
return;
}
memset(&argument, 0, sizeof(argument));
if (!svc_getargs(transp, xdr_argument, (caddr_t) & argument)) {
svcerr_decode(transp);
return;
}
result = (*local) ((char *)&argument, rqstp);
if (result != NULL && !svc_sendreply(transp, xdr_result, result)) {
svcerr_systemerr(transp);
}
if (!svc_freeargs(transp, xdr_argument, (caddr_t) & argument)) {
errstr(_("unable to free arguments\n"));
exit(1);
}
return;
}
static void
unregister (int sig)
{
pmap_unset(RQUOTAPROG, RQUOTAVERS);
pmap_unset(RQUOTAPROG, EXT_RQUOTAVERS);
exit(0);
}
/* Parse NFSD export table and find a filesystem pseudoroot if it is there */
static void get_pseudoroot(void)
{
FILE *f;
char exp_line[1024];
char *c;
strcpy(nfs_pseudoroot, "/");
if (!(f = fopen(xtab_path, "r"))) {
errstr(_("Warning: Cannot open export table %s: %s\nUsing '/' as a pseudofilesystem root.\n"), xtab_path, strerror(errno));
return;
}
while (fgets(exp_line, sizeof(exp_line), f)) {
if (exp_line[0] == '#' || exp_line[0] == '\n') /* Comment, empty line? */
continue;
c = strchr(exp_line, '\t');
if (!c) /* Huh, line we don't understand... */
continue;
*c = 0;
/* Find the beginning of export options */
c = strchr(c+1, '(');
if (!c)
continue;
c = strstr(c, "fsid=0");
if (c) {
sstrncpy(nfs_pseudoroot, exp_line, PATH_MAX);
sstrncat(nfs_pseudoroot, "/", PATH_MAX);
break;
}
}
fclose(f);
}
int main(int argc, char **argv)
{
register SVCXPRT *transp;
struct sigaction sa;
int sock;
gettexton();
progname = basename(argv[0]);
parse_options(argc, argv);
init_kernel_interface();
get_pseudoroot();
pmap_unset(RQUOTAPROG, RQUOTAVERS);
pmap_unset(RQUOTAPROG, EXT_RQUOTAVERS);
sa.sa_handler = SIG_IGN;
sa.sa_flags = 0;
sigemptyset(&sa.sa_mask);
sigaction(SIGCHLD, &sa, NULL);
sa.sa_handler = unregister;
sigaction(SIGHUP, &sa, NULL);
sigaction(SIGINT, &sa, NULL);
sigaction(SIGTERM, &sa, NULL);
sock = svcudp_socket(RQUOTAPROG, port, 1);
transp = svcudp_create(sock == -1 ? RPC_ANYSOCK : sock);
if (transp == NULL) {
errstr(_("cannot create udp service.\n"));
exit(1);
}
if (!svc_register(transp, RQUOTAPROG, RQUOTAVERS, rquotaprog_1, IPPROTO_UDP)) {
errstr(_("unable to register (RQUOTAPROG, RQUOTAVERS, UDP).\n"));
exit(1);
}
if (!svc_register(transp, RQUOTAPROG, EXT_RQUOTAVERS, rquotaprog_2, IPPROTO_UDP)) {
errstr(_("unable to register (RQUOTAPROG, EXT_RQUOTAVERS, UDP).\n"));
exit(1);
}
sock = svctcp_socket(RQUOTAPROG, port, 1);
transp = svctcp_create(sock == -1 ? RPC_ANYSOCK : sock, 0, 0);
if (transp == NULL) {
errstr(_("cannot create TCP service.\n"));
exit(1);
}
if (!svc_register(transp, RQUOTAPROG, RQUOTAVERS, rquotaprog_1, IPPROTO_TCP)) {
errstr(_("unable to register (RQUOTAPROG, RQUOTAVERS, TCP).\n"));
exit(1);
}
if (!svc_register(transp, RQUOTAPROG, EXT_RQUOTAVERS, rquotaprog_2, IPPROTO_TCP)) {
errstr(_("unable to register (RQUOTAPROG, EXT_RQUOTAVERS, TCP).\n"));
exit(1);
}
if (!(flags & FL_NODAEMON)) {
use_syslog();
daemon(0, 0);
}
svc_run();
errstr(_("svc_run returned\n"));
exit(1);
/* NOTREACHED */
}
|