summaryrefslogtreecommitdiff
path: root/convertquota.c
blob: efaee7144590f8a9db7c179dcb65e770af9b9ca9 (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
/*
 *
 *	Utility for converting quota file from old to new format
 *
 *	Sponsored by SuSE CR
 */

#include "config.h"

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <getopt.h>

#include <asm/byteorder.h>

#include "pot.h"
#include "common.h"
#include "quotaio.h"
#include "quotasys.h"
#include "quota.h"
#include "bylabel.h"
#include "quotaio_v2.h"
#include "dqblk_v2.h"

#define ACT_FORMAT 1		/* Convert format from old to new */
#define ACT_ENDIAN 2		/* Convert endianity */

static char *mntpoint;
char *progname;
static int ucv, gcv;
static struct quota_handle *qn;	/* Handle of new file */
static int action;			/* Action to be performed */
static int infmt, outfmt;

static void usage(void)
{
	errstr(_("Utility for converting quota files.\nUsage:\n\t%s [options] mountpoint\n\n\
-u, --user                          convert user quota file\n\
-g, --group                         convert group quota file\n\
-e, --convert-endian                convert quota file to correct endianity\n\
-f, --convert-format oldfmt,newfmt  convert from old to VFSv0 quota format\n\
-h, --help                          show this help text and exit\n\
-V, --version                       output version information and exit\n\n"), progname);
	errstr(_("Bugs to %s\n"), MY_EMAIL);
	exit(1);
}

static inline unsigned int min(unsigned a, unsigned b)
{
	if (a < b)
		return a;
	return b;
}

#define MAX_FMTNAME_LEN 32

static void parse_options(int argcnt, char **argstr)
{
	int ret;
	struct option long_opts[] = {
		{ "help", 0, NULL, 'h'},
		{ "version", 0, NULL, 'V'},
		{ "user", 0, NULL, 'u'},
		{ "group", 0, NULL, 'g'},
		{ "convert-endian", 0, NULL, 'e'},
		{ "convert-format", 1, NULL, 'f'},
		{ NULL, 0, NULL, 0}
	};
	char *comma;
	char fmtbuf[MAX_FMTNAME_LEN];

	while ((ret = getopt_long(argcnt, argstr, "Vugef:h", long_opts, NULL)) != -1) {
		switch (ret) {
			case '?':
			case 'h':
				usage();
			case 'V':
				version();
				exit(0);
			case 'u':
				ucv = 1;
				break;
			case 'g':
				gcv = 1;
				break;
			case 'e':
				action = ACT_ENDIAN;
				break;
			case 'f':
				action = ACT_FORMAT;
				comma = strchr(optarg, ',');
				if (!comma) {
					errstr(_("You have to specify source and target format of conversion.\n"));
					usage();
				}
				sstrncpy(fmtbuf, optarg, min(comma - optarg + 1, MAX_FMTNAME_LEN));
				infmt = name2fmt(fmtbuf);
				if (infmt == QF_ERROR)
					usage();
				outfmt = name2fmt(comma + 1);
				if (outfmt == QF_ERROR)
					usage();
				break;
		}
	}

	if (optind + 1 != argcnt) {
		errstr(_("Bad number of arguments.\n"));
		usage();
	}

	if (!(ucv | gcv))
		ucv = 1;
	if (!action) {
		errstr(_("You have to specify action to perform.\n"));
		usage();
	}

	mntpoint = argstr[optind];
}

/*
 *	Implementation of endian conversion
 */

typedef char *dqbuf_t;

#define set_bit(bmp, ind) ((bmp)[(ind) >> 3] |= (1 << ((ind) & 7)))
#define get_bit(bmp, ind) ((bmp)[(ind) >> 3] & (1 << ((ind) & 7)))

#define getdqbuf() smalloc(QT_BLKSIZE)
#define freedqbuf(buf) free(buf)

static inline void endian_disk2memdqblk(struct util_dqblk *m, struct v2r0_disk_dqblk *d)
{
	m->dqb_ihardlimit = __be32_to_cpu(d->dqb_ihardlimit);
	m->dqb_isoftlimit = __be32_to_cpu(d->dqb_isoftlimit);
	m->dqb_bhardlimit = __be32_to_cpu(d->dqb_bhardlimit);
	m->dqb_bsoftlimit = __be32_to_cpu(d->dqb_bsoftlimit);
	m->dqb_curinodes = __be32_to_cpu(d->dqb_curinodes);
	m->dqb_curspace = __be64_to_cpu(d->dqb_curspace);
	m->dqb_itime = __be64_to_cpu(d->dqb_itime);
	m->dqb_btime = __be64_to_cpu(d->dqb_btime);
}

/* Is given dquot empty? */
static int endian_empty_dquot(struct v2r0_disk_dqblk *d)
{
	static struct v2r0_disk_dqblk fakedquot;

	return !memcmp(d, &fakedquot, sizeof(fakedquot));
}

/* Read given block */
static void read_blk(int fd, uint blk, dqbuf_t buf)
{
	int err;

	lseek(fd, blk << QT_BLKSIZE_BITS, SEEK_SET);
	err = read(fd, buf, QT_BLKSIZE);
	if (err < 0)
		die(2, _("Cannot read block %u: %s\n"), blk, strerror(errno));
	else if (err != QT_BLKSIZE)
		memset(buf + err, 0, QT_BLKSIZE - err);
}

static void endian_report_block(int fd, uint blk, char *bitmap)
{
	dqbuf_t buf = getdqbuf();
	struct qt_disk_dqdbheader *dh;
	struct v2r0_disk_dqblk *ddata;
	struct dquot dquot;
	struct qtree_mem_dqinfo *info = &qn->qh_info.u.v2_mdqi.dqi_qtree;
	int i;

	set_bit(bitmap, blk);
	read_blk(fd, blk, buf);
	dh = (struct qt_disk_dqdbheader *)buf;
	ddata = (struct v2r0_disk_dqblk *)(dh + 1);
	for (i = 0; i < qtree_dqstr_in_blk(info); i++)
		if (!endian_empty_dquot(ddata + i)) {
			memset(&dquot, 0, sizeof(dquot));
			dquot.dq_h = qn;
			endian_disk2memdqblk(&dquot.dq_dqb, ddata + i);
			dquot.dq_id = __be32_to_cpu(ddata[i].dqb_id);
			if (qn->qh_ops->commit_dquot(&dquot, COMMIT_ALL) < 0)
				errstr(_("Cannot commit dquot for id %u: %s\n"),
					(uint)dquot.dq_id, strerror(errno));
		}
	freedqbuf(buf);
}

static void endian_report_tree(int fd, uint blk, int depth, char *bitmap)
{
	int i;
	dqbuf_t buf = getdqbuf();
	u_int32_t *ref = (u_int32_t *) buf;

	read_blk(fd, blk, buf);
	if (depth == QT_TREEDEPTH - 1) {
		for (i = 0; i < QT_BLKSIZE >> 2; i++) {
			blk = __be32_to_cpu(ref[i]);
			if (blk && !get_bit(bitmap, blk))
				endian_report_block(fd, blk, bitmap);
		}
	}
	else {
		for (i = 0; i < QT_BLKSIZE >> 2; i++)
			if ((blk = __be32_to_cpu(ref[i])))
				endian_report_tree(fd, blk, depth + 1, bitmap);
	}
	freedqbuf(buf);
}

static int endian_scan_structures(int fd, int type)
{
	char *bitmap;
	loff_t blocks = (lseek(fd, 0, SEEK_END) + QT_BLKSIZE - 1) >> QT_BLKSIZE_BITS;

	bitmap = smalloc((blocks + 7) >> 3);
	memset(bitmap, 0, (blocks + 7) >> 3);
	endian_report_tree(fd, QT_TREEOFF, 0, bitmap);
	free(bitmap);
	return 0;
}

static int endian_check_header(int fd, int type)
{
	struct v2_disk_dqheader head;
	u_int32_t file_magics[] = INITQMAGICS;
	u_int32_t known_versions[] = INIT_V2_VERSIONS;

	lseek(fd, 0, SEEK_SET);
	if (read(fd, &head, sizeof(head)) != sizeof(head)) {
		errstr(_("Cannot read header of old quotafile.\n"));
		return -1;
	}
	if (__be32_to_cpu(head.dqh_magic) != file_magics[type] || __be32_to_cpu(head.dqh_version) > known_versions[type]) {
		errstr(_("Bad file magic or version (probably not quotafile with bad endianity).\n"));
		return -1;
	}
	return 0;
}

static int endian_load_info(int fd, int type)
{
	struct v2_disk_dqinfo dinfo;

	if (read(fd, &dinfo, sizeof(dinfo)) != sizeof(dinfo)) {
		errstr(_("Cannot read information about old quotafile.\n"));
		return -1;
	}
	qn->qh_info.u.v2_mdqi.dqi_flags = __be32_to_cpu(dinfo.dqi_flags);
	qn->qh_info.dqi_bgrace = __be32_to_cpu(dinfo.dqi_bgrace);
	qn->qh_info.dqi_igrace = __be32_to_cpu(dinfo.dqi_igrace);
	return 0;
}

/*
 *	End of endian conversion
 */

static int convert_dquot(struct dquot *dquot, char *name)
{
	struct dquot newdquot;

	memset(&newdquot, 0, sizeof(newdquot));
	newdquot.dq_id = dquot->dq_id;
	newdquot.dq_h = qn;
	newdquot.dq_dqb.dqb_ihardlimit = dquot->dq_dqb.dqb_ihardlimit;
	newdquot.dq_dqb.dqb_isoftlimit = dquot->dq_dqb.dqb_isoftlimit;
	newdquot.dq_dqb.dqb_curinodes = dquot->dq_dqb.dqb_curinodes;
	newdquot.dq_dqb.dqb_bhardlimit = dquot->dq_dqb.dqb_bhardlimit;
	newdquot.dq_dqb.dqb_bsoftlimit = dquot->dq_dqb.dqb_bsoftlimit;
	newdquot.dq_dqb.dqb_curspace = dquot->dq_dqb.dqb_curspace;
	newdquot.dq_dqb.dqb_btime = dquot->dq_dqb.dqb_btime;
	newdquot.dq_dqb.dqb_itime = dquot->dq_dqb.dqb_itime;
	if (qn->qh_ops->commit_dquot(&newdquot, COMMIT_ALL) < 0) {
		errstr(_("Cannot commit dquot for id %u: %s\n"),
			(uint)dquot->dq_id, strerror(errno));
		return -1;
	}
	return 0;
}

static int rename_file(int type, int fmt, struct mount_entry *mnt)
{
	char *qfname, namebuf[PATH_MAX];
	int ret = 0;

	if (get_qf_name(mnt, type, fmt, 0, &qfname) < 0) {
		errstr(_("Cannot get name of new quotafile.\n"));
		return -1;
	}
	strcpy(namebuf, qfname);
	sstrncat(namebuf, ".new", sizeof(namebuf));
	if (rename(namebuf, qfname) < 0) {
		errstr(_("Cannot rename new quotafile %s to name %s: %s\n"),
			namebuf, qfname, strerror(errno));
		ret = -1;
	}
	free(qfname);
	return ret;
}

static int convert_format(int type, struct mount_entry *mnt)
{
	struct quota_handle *qo;
	int ret = 0;
	
	if (!(qo = init_io(mnt, type, infmt, IOI_INITSCAN))) {
		errstr(_("Cannot open old format file for %ss on %s\n"),
			_(type2name(type)), mnt->me_dir);
		return -1;
	}
	if (!(qn = new_io(mnt, type, outfmt))) {
		errstr(_("Cannot create file for %ss for new format on %s: %s\n"),
			_(type2name(type)), mnt->me_dir, strerror(errno));
		end_io(qo);
		return -1;
	}
	if (qo->qh_ops->scan_dquots(qo, convert_dquot) >= 0)	/* Conversion succeeded? */
		ret = rename_file(type, outfmt, mnt);
	else
		ret = -1;
	end_io(qo);
	end_io(qn);
	return ret;
}

static int convert_endian(int type, struct mount_entry *mnt)
{
	int ret = 0;
	int ofd;
	char *qfname;

	if (get_qf_name(mnt, type, QF_VFSV0, NF_EXIST, &qfname) < 0)
		return -1;
	if ((ofd = open(qfname, O_RDONLY)) < 0) {
		errstr(_("Cannot open old quota file on %s: %s\n"), mnt->me_dir, strerror(errno));
		free(qfname);
		return -1;
	}
	free(qfname);
	if (endian_check_header(ofd, type) < 0) {
		close(ofd);
		return -1;
	}
	if (!(qn = new_io(mnt, type, QF_VFSV0))) {
		errstr(_("Cannot create file for %ss for new format on %s: %s\n"),
			type2name(type), mnt->me_dir, strerror(errno));
		close(ofd);
		return -1;
	}
	if (endian_load_info(ofd, type) < 0) {
		end_io(qn);
		close(ofd);
		return -1;
	}
	ret = endian_scan_structures(ofd, type);
	end_io(qn);
	if (ret < 0)
		return ret;
	
	return rename_file(type, QF_VFSV0, mnt);
}

static int convert_file(int type, struct mount_entry *mnt)
{
	switch (action) {
		case ACT_FORMAT:
			return convert_format(type, mnt);
		case ACT_ENDIAN:
			return convert_endian(type, mnt);
	}
	errstr(_("Unknown action should be performed.\n"));
	return -1;
}

int main(int argc, char **argv)
{
	struct mount_entry *mnt;
	int ret = 0;
	
	gettexton();
	progname = basename(argv[0]);

	parse_options(argc, argv);
	init_kernel_interface();
	if (init_mounts_scan(1, &mntpoint, 0) < 0)
		return 1;
	if (!(mnt = get_next_mount())) {
		end_mounts_scan();
		return 1;
	}
	if (ucv)
		ret |= convert_file(USRQUOTA, mnt);
	if (gcv)
		ret |= convert_file(GRPQUOTA, mnt);
	end_mounts_scan();

	if (ret)
		return 1;
	return 0;
}