aboutsummaryrefslogtreecommitdiffstats
path: root/plpnfsd/mp_mount.c
blob: e6076295f5c3ba710e35b424a55561f11f0884b9 (plain)
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
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
/* $Id$
 *
 * Original version of this file from p3nfsd-5.4 by
 * Rudolf Koenig (rfkoenig@immd4.informatik.uni-erlangen.de)
 *
 * Modifications for plputils by Fritz Elfert <felfert@to.com>
 *
 */
#if defined(__SVR4) || defined(__sgi) || defined(linux)
#include <stdlib.h>
#include <unistd.h>
#include <string.h>		/* strdup */
#ifndef linux
extern int inet_addr(char *);
#endif
#define PORTMAP			/* I need svcudp_create in rpc/svc_soc.h, sol 2.4 */
#endif

#include <OSdefs.h>
#include <stdio.h>
#include <signal.h>
#include <sys/stat.h>
#include <sys/wait.h>

#ifdef __sgi
#include <bstring.h>
#endif

#if defined(__NetBSD__) || defined(__FreeBSD__)
#include <sys/param.h>		/* Needs NGROUPS for mount.h */
#define umount(dir) unmount(dir, 1)
#endif

#if defined(__NeXT__)
#include <libc.h>
#include <unistd.h>
#include <nfs/nfs_mount.h>
#define umount(dir) unmount(dir)
#endif

#include "defs.h"

static char nfshost[128];

#define NFSCLIENT
#ifdef __FreeBSD__
#define NFS
#endif				/* __FreeBSD__ */
#include <sys/mount.h>

#ifdef __FreeBSD__
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <rpc/rpc.h>
#include <nfs/rpcv2.h>
#if __FreeBSD_version >= 300001
#include <nfs/nfs.h>
#endif
#endif				/* __FreeBSD__ */

#include <rpc/rpc.h>
#include "nfs_prot.h"

#ifdef linux
#ifndef __GLIBC__
#include <linux/fs.h>		/* struct nfs_mount_data */
#endif
#include <linux/nfs_mount.h>	/* struct nfs_mount_data */
#include <arpa/inet.h>		/* inet_addr() */
#endif
#ifdef _IBMR2
#include "os-aix3.h"
#include "misc-aix3.h"
#include <sys/vmount.h>
#endif


#ifndef DONT_UPDATE_MTAB
#if defined(sun) && defined(__SVR4)
#include <sys/mnttab.h>
#else
#include <mntent.h>
#endif
#endif

#if defined(sun) && defined(__SVR4)	/*gec */
#include <nfs/mount.h>
#include <sys/fstyp.h>
#include <sys/fsid.h>
#include <sys/types.h>
#include <sys/stat.h>
#define PORTMAP
#endif

#if defined(sun) && !defined(__SVR4)
extern int _rpc_dtablesize();
#define umount unmount
#endif

#include <sys/socket.h>
#include <netdb.h>

#include "rfsv_api.h"

#ifdef __sgi
#define vfork fork
#define NFSMNT_NOCTO 0
#endif

#if defined(sun) && defined(__SVR4)
#define setmntent fopen
#define endmntent fclose
#define addmntent putmntent
#define mntent mnttab
#endif

static char *mntdir;		/* where we mounted the psion */

#ifdef __STDC__
static void doexit(void);
#endif

static void
usr1_handler SIGARG
{
	debug = (debug + 1) & 3;
	infolog("Set debug level to %d\n", debug);
};

static void
hup_handler SIGARG
{
	if (debug > 1)
		debuglog("Got HUP signal\n");
	exiting = 5;
};

static void
doexit()
{
#ifndef DONT_UPDATE_MTAB
	FILE *fpin, *fpout;
#if defined(sun) && defined(__SVR4)
	struct mntent entr;
#else
	struct mntent *ent;
#endif
#endif
#ifndef __FreeBSD__
	struct stat statb;
#endif

	exiting--;
	debuglog("Doing exit\n");

#ifdef _IBMR2
	if (stat(mntdir, &statb)) {
		errorlog("stat %s: %m\n", mntdir);
		return;
	}
	debuglog("Next call: uvmount(%d, 0)\n", statb.st_vfs);
	if (uvmount(statb.st_vfs, 0)) {
		errorlog("uvmount: %m\n");
		return;
	}
#else
	if (umount(mntdir)) {
		errorlog("umount %s: %m\n", mntdir);
		return;
	}
#endif

#ifndef DONT_UPDATE_MTAB
	debuglog("unmount succeeded, trying to fix mtab.\n");

	if (!(fpout = setmntent(MTAB_TMP, "w"))) {
		errorlog("%s: %m\n", MTAB_TMP);
		return;
	}
	if (!(fpin = setmntent(MTAB_PATH, "r"))) {
		endmntent(fpout);
		unlink(MTAB_TMP);
		errorlog("%s: %m\n", MTAB_PATH);
		exit(0);
	}
	if (fstat(fileno(fpin), &statb))
		errorlog("fstat: %m\n");
	else
		fchmod(fileno(fpout), statb.st_mode);

#if defined(sun) && defined(__SVR4)
	while (!getmntent(fpin, &entr))
		if (strcmp(entr.mnt_special, nfshost) || strcmp(entr.mnt_mountp, mntdir))
			putmntent(fpout, &entr);
#else
	while ((ent = getmntent(fpin)))
		if (strcmp(ent->mnt_fsname, nfshost) || strcmp(ent->mnt_dir, mntdir))
			addmntent(fpout, ent);
#endif
	endmntent(fpin);
	endmntent(fpout);

	if (rename(MTAB_TMP, MTAB_PATH)) {
		errorlog("%s: %m\n", MTAB_PATH);
		unlink(MTAB_TMP);
	}
#else
	debuglog("no mtab fixing needed\n");
#endif
	infolog("plpnfsd: terminating.\n");

	exit(0);
}

void
mount_and_run(char *dir, void (*proc)(), nfs_fh *root_fh)
{
	int sock, port, pid, doclean;
	struct sockaddr_in sain;
	int isalive = 0, ret, dtbsize;
	SVCXPRT *nfsxprt;
	int bufsiz = 0xc000;	/* room for a few biods */
#ifdef linux
	struct nfs_mount_data nfs_mount_data;
	int mount_flags;
	int ksock, kport;
	struct sockaddr_in kaddr;
#else
	struct nfs_args nfs_args;
#endif
#ifdef __FreeBSD__
	int mount_flags;
#endif

	sprintf(nfshost, "localhost:/psion");
	bzero((char *) &sain, sizeof(struct sockaddr_in));
#ifdef linux
	bzero(&nfs_mount_data, sizeof(struct nfs_mount_data));
#else
	bzero((char *) &nfs_args, sizeof(struct nfs_args));
#endif

/*** First part: set up the rpc service */
	/* Create udp socket */
	sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
	if (setsockopt(sock, SOL_SOCKET, SO_RCVBUF, (char *) &bufsiz, sizeof(bufsiz)))
		errorlog("setsockopt: %m\n");

	/* Bind it to a reserved port */
	sain.sin_family = AF_INET;
	sain.sin_addr.s_addr = inet_addr("127.0.0.1");
	for (port = IPPORT_RESERVED - 1; port > IPPORT_RESERVED / 2; port--) {
		sain.sin_port = htons(port);
		if (bind(sock, (struct sockaddr *) &sain, sizeof(sain)) >= 0)
			break;
	}
	if (port <= IPPORT_RESERVED / 2) {
		errorlog("bind to reserved port: %m\n");
		exit(1);
	}
	if ((nfsxprt = svcudp_create(sock)) == 0) {
		errorlog("svcudp_create: %m\n");
		exit(1);
	}
	if (!svc_register(nfsxprt, NFS_PROGRAM, NFS_VERSION, proc, 0)) {
		errorlog("svc_register: %m\n");
		exit(1);
	}
	debuglog("created svc PROG=%d, VER=%d port=%d\n",
		       NFS_PROGRAM, NFS_VERSION, port);


/*** Second part: mount the directory */
#ifdef linux
	/*
	 * Hold your hat! Another odd internet socket coming up. The linux
	 * kernel needs the socket to talk to the nfs daemon.
	 */
	ksock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
	if (ksock < 0) {
		errorlog("Cannot create kernel socket: %m\n");
		exit(1);
	}
	kaddr.sin_family = AF_INET;
	kaddr.sin_addr.s_addr = inet_addr("127.0.0.1");
	for (kport = IPPORT_RESERVED - 1; kport > IPPORT_RESERVED / 2; kport--) {
		kaddr.sin_port = htons(kport);
		if (bind(ksock, (struct sockaddr *) &kaddr, sizeof(kaddr)) >= 0)
			break;
	}
	if (kport <= IPPORT_RESERVED / 2) {
		errorlog("bind to reserved port: %m\n");
		exit(1);
	}
	nfs_mount_data.version = NFS_MOUNT_VERSION;
	nfs_mount_data.fd = ksock;
	nfs_mount_data.root = *root_fh;		/* structure copy */
	nfs_mount_data.flags = NFS_MOUNT_INTR | NFS_MOUNT_NOCTO;
	/* NFS_MOUNT_SECURE | NFS_MOUNT_POSIX | NFS_MOUNT_SOFT | NFS_MOUNT_NOAC */
	nfs_mount_data.rsize = PBUFSIZE;
	nfs_mount_data.wsize = PBUFSIZE;
	nfs_mount_data.timeo = 600;
	nfs_mount_data.retrans = 10;	/* default 3 */
	nfs_mount_data.acregmin = 3;	/* default 3 seconds */
	nfs_mount_data.acregmax = 60;	/* default 60 seconds */
	nfs_mount_data.acdirmin = 30;	/* default 30 seconds */
	nfs_mount_data.acdirmax = 60;	/* default 60 seconds */
	nfs_mount_data.addr = sain;	/* structure copy */
	strcpy(nfs_mount_data.hostname, PSIONHOSTNAME);

	if (connect(ksock, (struct sockaddr *) &nfs_mount_data.addr, sizeof(nfs_mount_data.addr)) < 0) {
		errorlog("Cannot connect to plpnfsd: %m\n");
		exit(1);
	}
	mount_flags = MS_MGC_VAL;	/* | MS_SYNC | MS_RDONLY | MS_NOEXEC | MS_NODEV | MS_NOSUID */

#endif

#if defined(sun) && defined (__SVR4)
	{			/*gec */
		struct netbuf myaddr;
		struct stat stb;
		struct knetconfig knc;
		struct netconfig *nc = getnetconfigent("udp");
		if (!nc) {
			extern int errno;
			errorlog("getnetconfigent \"udp\": (errno %d) %m\n", errno);
			exit(1);
		}
		knc.knc_semantics = nc->nc_semantics;
		knc.knc_protofmly = strdup(nc->nc_protofmly);
		knc.knc_proto = strdup(nc->nc_proto);

		if (stat(nc->nc_device, &stb)) {
			extern int errno;
			errorlog("stat \"%s\": (errno %d) %m\n", nc->nc_device, errno);
			exit(1);
		}
		knc.knc_rdev = stb.st_rdev;

		/*freenetconfigent(nc) has the struct been allocated, or is it static ?!? */

		debuglog("%d,%s,%s,%lx (1,inet,udp,0x002c0029)\n", (int) knc.knc_semantics,
			 knc.knc_protofmly, knc.knc_proto, knc.knc_rdev);

		myaddr.maxlen = myaddr.len = sizeof(sain);
		myaddr.buf = (char *) &sain;

		nfs_args.knconf = &knc;
		nfs_args.wsize = PBUFSIZE;
		nfs_args.rsize = PBUFSIZE;
		nfs_args.addr = &myaddr;
		nfs_args.fh = (char *) root_fh;
		nfs_args.retrans = 10;
		/* 1 minute timeout - see below */
		nfs_args.timeo = 600;
		nfs_args.hostname = PSIONHOSTNAME;
		nfs_args.flags = NFSMNT_INT | NFSMNT_HOSTNAME | NFSMNT_NOCTO |
		    NFSMNT_RETRANS | NFSMNT_TIMEO | NFSMNT_WSIZE |
		    NFSMNT_RSIZE | NFSMNT_KNCONF /* | NFSMNT_NOAC */ ;
		/* eventually drop knc-strings now (memory-leak) */
	}
#endif				/* solaris */

/* BSD Derived systems */
#if (defined(sun) && !defined(__SVR4))  || defined(hpux) || defined(__sgi) || defined(__NeXT__)
	nfs_args.addr = &sain;
	nfs_args.fh = (void *) root_fh;
	nfs_args.wsize = PBUFSIZE;
	nfs_args.rsize = PBUFSIZE;
	nfs_args.retrans = 10;
	/* 1 minute timeout - means that we receive double requests in worst case,
	   if the file is longer than 100k. So long for the theory. Since SunOS uses
	   dynamic retransmission (hardwired), nfs_args.timeo is only a hint. :-( */
	nfs_args.timeo = 600;
	nfs_args.hostname = PSIONHOSTNAME;
	nfs_args.flags = NFSMNT_INT | NFSMNT_HOSTNAME | NFSMNT_NOCTO |
	    NFSMNT_RETRANS | NFSMNT_TIMEO | NFSMNT_WSIZE | NFSMNT_RSIZE;
#endif

#ifdef __FreeBSD__
#if __FreeBSD_version >= 300001
	nfs_args.version = NFS_ARGSVERSION;
#endif
	nfs_args.addr = (struct sockaddr *) &sain;
	nfs_args.addrlen = sizeof(sain);
	nfs_args.sotype = SOCK_DGRAM;
	nfs_args.fh = (void *) root_fh;
	nfs_args.fhsize = sizeof(*root_fh);
	nfs_args.wsize = PBUFSIZE;
	nfs_args.rsize = PBUFSIZE;
	nfs_args.retrans = 10;
	/* 1 minute timeout - see below */
	nfs_args.timeo = 600;
	nfs_args.hostname = PSIONHOSTNAME;
	nfs_args.flags =
	    NFSMNT_INT |
	    NFSMNT_SOFT |
	    NFSMNT_RETRANS |
	    NFSMNT_TIMEO |
	    NFSMNT_WSIZE |
	    NFSMNT_RSIZE;
	mount_flags = MNT_NOSUID | MNT_NODEV | MNT_NOEXEC | MNT_NOATIME;
#endif

#ifdef __NetBSD__
	nfs_args.addrlen = sizeof(sain);
	nfs_args.sotype = SOCK_DGRAM;
	nfs_args.maxgrouplist = NGROUPS;
	nfs_args.readahead = 1;
	nfs_args.addr = (struct sockaddr *) &sain;
	nfs_args.fh = (void *) root_fh;
	nfs_args.wsize = PBUFSIZE;
	nfs_args.rsize = PBUFSIZE;
	nfs_args.retrans = 10;
	nfs_args.timeo = 600;
	nfs_args.hostname = PSIONHOSTNAME;
	nfs_args.flags = NFSMNT_INT | NFSMNT_RETRANS | NFSMNT_TIMEO
	    | NFSMNT_NOCONN | NFSMNT_DUMBTIMR | NFSMNT_MYWRITE
	    | NFSMNT_WSIZE | NFSMNT_RSIZE;
#endif

#if defined(_IBMR2)
	nfs_args.addr = sain;
	nfs_args.fh = *(fhandle_t *) root_fh;
	nfs_args.wsize = PBUFSIZE;
	nfs_args.rsize = PBUFSIZE;
	nfs_args.retrans = 0;	/* Shouldn't need bigger retrans since there is
				   only one biod. Somebody prove it ? Nice feature. */
	nfs_args.biods = 1;
	nfs_args.timeo = 150;
	nfs_args.hostname = PSIONHOSTNAME;
	nfs_args.flags = NFSMNT_INT | NFSMNT_HOSTNAME | NFSMNT_BIODS |
	    NFSMNT_RETRANS | NFSMNT_TIMEO | NFSMNT_WSIZE | NFSMNT_RSIZE;
#endif

	mntdir = dir;
	switch (pid = fork()) {
		case 0:
			break;
		case -1:
			errorlog("fork: %m\n");
			exit(1);
		default:
			debuglog("Going to mount...\n");

#if defined(__sgi) || (defined(sun) && defined(__SVR4))
			if (mount("", dir, MS_DATA, "nfs", &nfs_args, sizeof(nfs_args)))
#endif
#if defined(__NetBSD__) || defined(__NeXT__)
			if (mount(MOUNT_NFS, dir, 0, (caddr_t) & nfs_args))
#endif
#ifdef hpux
			if (vfsmount(MOUNT_NFS, dir, 0, &nfs_args))
#endif
#if defined(sun) && !defined(__SVR4)
			if (mount("nfs", dir, M_NEWTYPE, (caddr_t) & nfs_args))
#endif
#ifdef linux
			if (mount("nfs", dir, "nfs", mount_flags, &nfs_mount_data))
#endif
#ifdef _IBMR2
			if (aix3_mount("psion:loc", dir, 0, MOUNT_TYPE_NFS, &nfs_args, "plpnfsd"))
#endif

#ifdef __FreeBSD__
#if __FreeBSD_version >= 300001
			if (mount("nfs", dir, mount_flags, &nfs_args))
#else
			if (mount(MOUNT_NFS, dir, mount_flags, &nfs_args))
#endif
#endif

			{
				errorlog("nfs mount %s: %m\n", dir);
				kill(pid, SIGTERM);
				exit(0);
			} else {
#ifndef DONT_UPDATE_MTAB
				FILE *mfp;
				struct mntent mnt;
#if defined(sun) && defined(__SVR4)	/*gec */
				char tim[32];
#endif

				debuglog("Mount succeded, making mtab entry.\n");

#if defined(sun) && defined(__SVR4)	/*gec */
				mnt.mnt_special = nfshost;
				mnt.mnt_mountp = mntdir;
				mnt.mnt_fstype = "nfs";
				mnt.mnt_mntopts = "hard,intr";	/* dev=??? */
				sprintf(tim, "%ld", time(NULL));	/* umount crashes! without this */
				mnt.mnt_time = tim;
#else
				mnt.mnt_fsname = nfshost;
				mnt.mnt_dir = mntdir;
				mnt.mnt_type = "nfs";
				mnt.mnt_opts = "hard,intr";
				mnt.mnt_freq = mnt.mnt_passno = 0;
#endif

				if ((mfp = setmntent(MTAB_PATH, "a")))
					addmntent(mfp, &mnt);
				else
					errorlog("%s: %m\n", MTAB_PATH);
				endmntent(mfp);
#endif				/* !DONT_UPDATE_MTAB */
			}
			exit(0);
	}

/*** Third part: let's go */
	infolog("to stop the server do \"ls %s/exit\".\n", mntdir);

#if defined(sun) && !defined(__SVR4)
	dtbsize = _rpc_dtablesize();
#else
	dtbsize = FD_SETSIZE;
#endif

	/*
	 * Signal handling, etc. should only happen in one process, so let's
	 * make it this one (the other one might well go away). We really
	 * ought to block off the other signals, but that's OK...
	 */
	signal(SIGUSR1, usr1_handler);
	signal(SIGHUP, hup_handler);
	signal(SIGPIPE, SIG_IGN);

	for (;;) {
		fd_set readfd;
		struct timeval tv;
		struct cache *cp;
		struct dcache *dcp;

		readfd = svc_fdset;
		tv.tv_sec = 2;
		tv.tv_usec = 0;

		ret = select(dtbsize, &readfd, 0, 0, &tv);
		if (ret > 0)
			svc_getreqset(&readfd);
		if (ret != 0)
			continue;

		/* Do some housekeeping */

		if (exiting)
			doexit();

		/*
		 * Solaris sends blocks in a way which is not very pleasent
		 * for us. It sends blocks 0,1,2,3,4,5,6, then 9,10,11 and
		 * do on. A little bit later block 7 and 8 arrives. This "bit"
		 * is more that 2 seconds, it is about 6 seconds. It occurs,
		 * if we're rewriting a file. We set MAXWRITE to 15, meaning
		 * that we are waiting for 30 seconds to receive the missing
		 * blocks.
		 */

#define MAXWRITE 15
		doclean = 1;
		for (cp = attrcache; cp; cp = cp->next)
			for (dcp = cp->dcache; dcp; dcp = dcp->next)
				if (dcp->towrite) {
					debuglog("waiting for block %d in %s to write (%d)\n",
						       dcp->offset, get_num(cp->inode)->name, dcp->towrite);
					if (++dcp->towrite <= MAXWRITE)
						doclean = 0;	/* Wait with cleaning */
				}
		ret = rfsv_isalive();
		if (isalive) {
			if (!ret) {
				debuglog("Disconnected...\n");
				doclean = 1;
			}
		} else {
			if (ret)
				debuglog("Connected...\n");
		}
		isalive = ret;
		if (doclean) {
			for (cp = attrcache; cp; cp = cp->next)
				for (dcp = cp->dcache; dcp; dcp = dcp->next)
					if (dcp->towrite)
						errorlog("PLPNFSD WARNING: file %s block at %d not written\n",
						       get_num(cp->inode)->name, dcp->offset);
			clean_cache(&attrcache);
			query_cache = 0;	/* clear the GETDENTS "cache". */
		}
	}
}