1/*
2 * by Manuel Bouyer (bouyer@ensta.fr)
3 *
4 * There is no copyright, you can use it as you want.
5 */
6
7#include <sys/param.h>
8#include <sys/mount.h>
9#include <sys/file.h>
10#include <sys/stat.h>
11#include <sys/socket.h>
12
13#include <ufs/ufs/quota.h>
14#include <rpc/rpc.h>
15#include <rpcsvc/rquota.h>
16#include <arpa/inet.h>
17#include <netdb.h>
18
19#include <ctype.h>
20#include <errno.h>
21#include <fstab.h>
22#include <grp.h>
23#include <libutil.h>
24#include <pwd.h>
25#include <signal.h>
26#include <stdio.h>
27#include <stdlib.h>
28#include <err.h>
29#include <string.h>
30#include <syslog.h>
31#include <unistd.h>
32
33static void rquota_service_1(struct svc_req *request, SVCXPRT *transp);
34static void rquota_service_2(struct svc_req *request, SVCXPRT *transp);
35static void sendquota(struct svc_req *request, SVCXPRT *transp);
36static void sendquota_extended(struct svc_req *request, SVCXPRT *transp);
37static int getfsquota(int type, long id, char *path, struct dqblk *dqblk);
38
39static int from_inetd = 1;
40static int debug = 0;
41
42static void
43cleanup(int sig)
44{
45
46	(void)sig;
47	(void)rpcb_unset(RQUOTAPROG, RQUOTAVERS, NULL);
48	exit(0);
49}
50
51int
52main(int argc, char **argv)
53{
54	SVCXPRT *transp;
55	int ok;
56	struct sockaddr_storage from;
57	socklen_t fromlen;
58	int vers;
59	int ch;
60
61	while ((ch = getopt(argc, argv, "d")) != -1) {
62		switch (ch) {
63		case 'd':
64			debug++;
65			break;
66		default:
67			break;
68		}
69	}
70
71	fromlen = sizeof(from);
72	if (getsockname(0, (struct sockaddr *)&from, &fromlen) < 0)
73		from_inetd = 0;
74
75	if (!from_inetd) {
76		if (!debug)
77			daemon(0, 0);
78		(void)rpcb_unset(RQUOTAPROG, RQUOTAVERS, NULL);
79		(void)signal(SIGINT, cleanup);
80		(void)signal(SIGTERM, cleanup);
81		(void)signal(SIGHUP, cleanup);
82	}
83
84	openlog("rpc.rquotad", LOG_CONS|LOG_PID, LOG_DAEMON);
85
86	/* create and register the service */
87	if (from_inetd) {
88		transp = svc_tli_create(0, NULL, NULL, 0, 0);
89		if (transp == NULL) {
90			syslog(LOG_ERR, "couldn't create udp service.");
91			exit(1);
92		}
93		vers = RQUOTAVERS;
94		ok = svc_reg(transp, RQUOTAPROG, RQUOTAVERS,
95		    rquota_service_1, NULL);
96		if (ok) {
97			vers = EXT_RQUOTAVERS;
98			ok = svc_reg(transp, RQUOTAPROG, EXT_RQUOTAVERS,
99				     rquota_service_2, NULL);
100		}
101	} else {
102		vers = RQUOTAVERS;
103		ok = svc_create(rquota_service_1,
104		    RQUOTAPROG, RQUOTAVERS, "udp");
105		if (ok) {
106			vers = EXT_RQUOTAVERS;
107			ok = svc_create(rquota_service_2,
108					RQUOTAPROG, EXT_RQUOTAVERS, "udp");
109
110		}
111	}
112	if (!ok) {
113		syslog(LOG_ERR,
114		    "unable to register (RQUOTAPROG, %s, %s)",
115		       vers == RQUOTAVERS ? "RQUOTAVERS" : "EXT_RQUOTAVERS",
116		       from_inetd ? "(inetd)" : "udp");
117		exit(1);
118	}
119
120	svc_run();
121	syslog(LOG_ERR, "svc_run returned");
122	exit(1);
123}
124
125static void
126rquota_service_2(struct svc_req *request, SVCXPRT *transp)
127{
128
129	switch (request->rq_proc) {
130	case NULLPROC:
131		(void)svc_sendreply(transp, (xdrproc_t)xdr_void, (char *)NULL);
132		break;
133	case RQUOTAPROC_GETQUOTA:
134	case RQUOTAPROC_GETACTIVEQUOTA:
135		sendquota_extended(request, transp);
136		break;
137	default:
138		svcerr_noproc(transp);
139		break;
140	}
141	if (from_inetd)
142		exit(0);
143}
144
145static void
146rquota_service_1(struct svc_req *request, SVCXPRT *transp)
147{
148
149	switch (request->rq_proc) {
150	case NULLPROC:
151		(void)svc_sendreply(transp, (xdrproc_t)xdr_void, (char *)NULL);
152		break;
153	case RQUOTAPROC_GETQUOTA:
154	case RQUOTAPROC_GETACTIVEQUOTA:
155		sendquota(request, transp);
156		break;
157	default:
158		svcerr_noproc(transp);
159		break;
160	}
161	if (from_inetd)
162		exit(0);
163}
164
165/* read quota for the specified id, and send it */
166static void
167sendquota(struct svc_req *request, SVCXPRT *transp)
168{
169	struct getquota_args getq_args;
170	struct getquota_rslt getq_rslt;
171	struct dqblk dqblk;
172	struct timeval timev;
173	int scale;
174
175	bzero(&getq_args, sizeof(getq_args));
176	if (!svc_getargs(transp, (xdrproc_t)xdr_getquota_args, &getq_args)) {
177		svcerr_decode(transp);
178		return;
179	}
180	if (request->rq_cred.oa_flavor != AUTH_UNIX) {
181		/* bad auth */
182		getq_rslt.status = Q_EPERM;
183	} else if (!getfsquota(USRQUOTA, getq_args.gqa_uid, getq_args.gqa_pathp, &dqblk)) {
184		/* failed, return noquota */
185		getq_rslt.status = Q_NOQUOTA;
186	} else {
187		gettimeofday(&timev, NULL);
188		getq_rslt.status = Q_OK;
189		getq_rslt.getquota_rslt_u.gqr_rquota.rq_active = TRUE;
190		scale = 1 << flsll(dqblk.dqb_bhardlimit >> 32);
191		getq_rslt.getquota_rslt_u.gqr_rquota.rq_bsize =
192		    DEV_BSIZE * scale;
193		getq_rslt.getquota_rslt_u.gqr_rquota.rq_bhardlimit =
194		    dqblk.dqb_bhardlimit / scale;
195		getq_rslt.getquota_rslt_u.gqr_rquota.rq_bsoftlimit =
196		    dqblk.dqb_bsoftlimit / scale;
197		getq_rslt.getquota_rslt_u.gqr_rquota.rq_curblocks =
198		    dqblk.dqb_curblocks / scale;
199		getq_rslt.getquota_rslt_u.gqr_rquota.rq_fhardlimit =
200		    dqblk.dqb_ihardlimit;
201		getq_rslt.getquota_rslt_u.gqr_rquota.rq_fsoftlimit =
202		    dqblk.dqb_isoftlimit;
203		getq_rslt.getquota_rslt_u.gqr_rquota.rq_curfiles =
204		    dqblk.dqb_curinodes;
205		getq_rslt.getquota_rslt_u.gqr_rquota.rq_btimeleft =
206		    dqblk.dqb_btime - timev.tv_sec;
207		getq_rslt.getquota_rslt_u.gqr_rquota.rq_ftimeleft =
208		    dqblk.dqb_itime - timev.tv_sec;
209	}
210	if (!svc_sendreply(transp, (xdrproc_t)xdr_getquota_rslt, &getq_rslt))
211		svcerr_systemerr(transp);
212	if (!svc_freeargs(transp, (xdrproc_t)xdr_getquota_args, &getq_args)) {
213		syslog(LOG_ERR, "unable to free arguments");
214		exit(1);
215	}
216}
217
218static void
219sendquota_extended(struct svc_req *request, SVCXPRT *transp)
220{
221	struct ext_getquota_args getq_args;
222	struct getquota_rslt getq_rslt;
223	struct dqblk dqblk;
224	struct timeval timev;
225	int scale;
226
227	bzero(&getq_args, sizeof(getq_args));
228	if (!svc_getargs(transp, (xdrproc_t)xdr_ext_getquota_args, &getq_args)) {
229		svcerr_decode(transp);
230		return;
231	}
232	if (request->rq_cred.oa_flavor != AUTH_UNIX) {
233		/* bad auth */
234		getq_rslt.status = Q_EPERM;
235	} else if (!getfsquota(getq_args.gqa_type, getq_args.gqa_id, getq_args.gqa_pathp, &dqblk)) {
236		/* failed, return noquota */
237		getq_rslt.status = Q_NOQUOTA;
238	} else {
239		gettimeofday(&timev, NULL);
240		getq_rslt.status = Q_OK;
241		getq_rslt.getquota_rslt_u.gqr_rquota.rq_active = TRUE;
242		scale = 1 << flsll(dqblk.dqb_bhardlimit >> 32);
243		getq_rslt.getquota_rslt_u.gqr_rquota.rq_bsize =
244		    DEV_BSIZE * scale;
245		getq_rslt.getquota_rslt_u.gqr_rquota.rq_bhardlimit =
246		    dqblk.dqb_bhardlimit / scale;
247		getq_rslt.getquota_rslt_u.gqr_rquota.rq_bsoftlimit =
248		    dqblk.dqb_bsoftlimit / scale;
249		getq_rslt.getquota_rslt_u.gqr_rquota.rq_curblocks =
250		    dqblk.dqb_curblocks / scale;
251		getq_rslt.getquota_rslt_u.gqr_rquota.rq_fhardlimit =
252		    dqblk.dqb_ihardlimit;
253		getq_rslt.getquota_rslt_u.gqr_rquota.rq_fsoftlimit =
254		    dqblk.dqb_isoftlimit;
255		getq_rslt.getquota_rslt_u.gqr_rquota.rq_curfiles =
256		    dqblk.dqb_curinodes;
257		getq_rslt.getquota_rslt_u.gqr_rquota.rq_btimeleft =
258		    dqblk.dqb_btime - timev.tv_sec;
259		getq_rslt.getquota_rslt_u.gqr_rquota.rq_ftimeleft =
260		    dqblk.dqb_itime - timev.tv_sec;
261	}
262	if (!svc_sendreply(transp, (xdrproc_t)xdr_getquota_rslt, &getq_rslt))
263		svcerr_systemerr(transp);
264	if (!svc_freeargs(transp, (xdrproc_t)xdr_getquota_args, &getq_args)) {
265		syslog(LOG_ERR, "unable to free arguments");
266		exit(1);
267	}
268}
269
270/*
271 * gets the quotas for id, filesystem path.
272 * Return 0 if fail, 1 otherwise
273 */
274static int
275getfsquota(int type, long id, char *path, struct dqblk *dqblk)
276{
277	struct quotafile *qf;
278	/*
279	 * Remote quota checking is limited to mounted filesystems.
280	 * Since UFS and ZFS support the quota system calls, we
281	 * only need to make an fstab object that has the path, and
282	 * a blank name for the filesystem type.
283	 * This allows the quota_open() call to work the way we
284	 * expect it to.
285	 *
286	 * The static char declaration is because compiler warnings
287	 * don't allow passing a const char * to a char *.
288	 */
289	int rv;
290	static char blank[] = "";
291	struct fstab fst;
292
293	fst.fs_file = path;
294	fst.fs_mntops = blank;
295	fst.fs_vfstype = blank;
296
297	if (type != USRQUOTA && type != GRPQUOTA)
298		return (0);
299
300	qf = quota_open(&fst, type, O_RDONLY);
301	if (debug)
302		warnx("quota_open(<%s, %s>, %d) returned %p",
303		      fst.fs_file, fst.fs_mntops, type,
304		      qf);
305	if (qf == NULL)
306		return (0);
307
308	rv = quota_read(qf, dqblk, id) == 0;
309	quota_close(qf);
310	if (debug)
311		warnx("getfsquota(%d, %ld, %s, %p) -> %d",
312		      type, id, path, dqblk, rv);
313	return (rv);
314}
315