aboutsummaryrefslogtreecommitdiffstats
path: root/fs/nilfs2/ioctl.c
blob: 89dd73ead9ac42cf33f0cc72e90a4f2b03ecd447 (plain) (blame)
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
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
/*
 * ioctl.c - NILFS ioctl operations.
 *
 * Copyright (C) 2007, 2008 Nippon Telegraph and Telephone Corporation.
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * Written by Koji Sato <koji@osrg.net>.
 */

#include <linux/fs.h>
#include <linux/wait.h>
#include <linux/smp_lock.h>	/* lock_kernel(), unlock_kernel() */
#include <linux/capability.h>	/* capable() */
#include <linux/uaccess.h>	/* copy_from_user(), copy_to_user() */
#include <linux/vmalloc.h>
#include <linux/nilfs2_fs.h>
#include "nilfs.h"
#include "segment.h"
#include "bmap.h"
#include "cpfile.h"
#include "sufile.h"
#include "dat.h"


static int nilfs_ioctl_wrap_copy(struct the_nilfs *nilfs,
				 struct nilfs_argv *argv, int dir,
				 ssize_t (*dofunc)(struct the_nilfs *,
						   __u64 *, int,
						   void *, size_t, size_t))
{
	void *buf;
	void __user *base = (void __user *)(unsigned long)argv->v_base;
	size_t maxmembs, total, n;
	ssize_t nr;
	int ret, i;
	__u64 pos, ppos;

	if (argv->v_nmembs == 0)
		return 0;

	if (argv->v_size > PAGE_SIZE)
		return -EINVAL;

	buf = (void *)__get_free_pages(GFP_NOFS, 0);
	if (unlikely(!buf))
		return -ENOMEM;
	maxmembs = PAGE_SIZE / argv->v_size;

	ret = 0;
	total = 0;
	pos = argv->v_index;
	for (i = 0; i < argv->v_nmembs; i += n) {
		n = (argv->v_nmembs - i < maxmembs) ?
			argv->v_nmembs - i : maxmembs;
		if ((dir & _IOC_WRITE) &&
		    copy_from_user(buf, base + argv->v_size * i,
				   argv->v_size * n)) {
			ret = -EFAULT;
			break;
		}
		ppos = pos;
		nr = dofunc(nilfs, &pos, argv->v_flags, buf, argv->v_size,
			       n);
		if (nr < 0) {
			ret = nr;
			break;
		}
		if ((dir & _IOC_READ) &&
		    copy_to_user(base + argv->v_size * i, buf,
				 argv->v_size * nr)) {
			ret = -EFAULT;
			break;
		}
		total += nr;
		if ((size_t)nr < n)
			break;
		if (pos == ppos)
			pos += n;
	}
	argv->v_nmembs = total;

	free_pages((unsigned long)buf, 0);
	return ret;
}

static int nilfs_ioctl_change_cpmode(struct inode *inode, struct file *filp,
				     unsigned int cmd, void __user *argp)
{
	struct inode *cpfile = NILFS_SB(inode->i_sb)->s_nilfs->ns_cpfile;
	struct nilfs_transaction_info ti;
	struct nilfs_cpmode cpmode;
	int ret;

	if (!capable(CAP_SYS_ADMIN))
		return -EPERM;
	if (copy_from_user(&cpmode, argp, sizeof(cpmode)))
		return -EFAULT;

	nilfs_transaction_begin(inode->i_sb, &ti, 0);
	ret = nilfs_cpfile_change_cpmode(
		cpfile, cpmode.cm_cno, cpmode.cm_mode);
	if (unlikely(ret < 0)) {
		nilfs_transaction_abort(inode->i_sb);
		return ret;
	}
	nilfs_transaction_commit(inode->i_sb); /* never fails */
	return ret;
}

static int
nilfs_ioctl_delete_checkpoint(struct inode *inode, struct file *filp,
			      unsigned int cmd, void __user *argp)
{
	struct inode *cpfile = NILFS_SB(inode->i_sb)->s_nilfs->ns_cpfile;
	struct nilfs_transaction_info ti;
	__u64 cno;
	int ret;

	if (!capable(CAP_SYS_ADMIN))
		return -EPERM;
	if (copy_from_user(&cno, argp, sizeof(cno)))
		return -EFAULT;

	nilfs_transaction_begin(inode->i_sb, &ti, 0);
	ret = nilfs_cpfile_delete_checkpoint(cpfile, cno);
	if (unlikely(ret < 0)) {
		nilfs_transaction_abort(inode->i_sb);
		return ret;
	}
	nilfs_transaction_commit(inode->i_sb); /* never fails */
	return ret;
}

static ssize_t
nilfs_ioctl_do_get_cpinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
			  void *buf, size_t size, size_t nmembs)
{
	int ret;

	down_read(&nilfs->ns_segctor_sem);
	ret = nilfs_cpfile_get_cpinfo(nilfs->ns_cpfile, posp, flags, buf,
				      size, nmembs);
	up_read(&nilfs->ns_segctor_sem);
	return ret;
}

static int nilfs_ioctl_get_cpstat(struct inode *inode, struct file *filp,
				  unsigned int cmd, void __user *argp)
{
	struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
	struct nilfs_cpstat cpstat;
	int ret;

	down_read(&nilfs->ns_segctor_sem);
	ret = nilfs_cpfile_get_stat(nilfs->ns_cpfile, &cpstat);
	up_read(&nilfs->ns_segctor_sem);
	if (ret < 0)
		return ret;

	if (copy_to_user(argp, &cpstat, sizeof(cpstat)))
		ret = -EFAULT;
	return ret;
}

static ssize_t
nilfs_ioctl_do_get_suinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
			  void *buf, size_t size, size_t nmembs)
{
	int ret;

	down_read(&nilfs->ns_segctor_sem);
	ret = nilfs_sufile_get_suinfo(nilfs->ns_sufile, *posp, buf, size,
				      nmembs);
	up_read(&nilfs->ns_segctor_sem);
	return ret;
}

static int nilfs_ioctl_get_sustat(struct inode *inode, struct file *filp,
				  unsigned int cmd, void __user *argp)
{
	struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
	struct nilfs_sustat sustat;
	int ret;

	down_read(&nilfs->ns_segctor_sem);
	ret = nilfs_sufile_get_stat(nilfs->ns_sufile, &sustat);
	up_read(&nilfs->ns_segctor_sem);
	if (ret < 0)
		return ret;

	if (copy_to_user(argp, &sustat, sizeof(sustat)))
		ret = -EFAULT;
	return ret;
}

static ssize_t
nilfs_ioctl_do_get_vinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
			 void *buf, size_t size, size_t nmembs)
{
	int ret;

	down_read(&nilfs->ns_segctor_sem);
	ret = nilfs_dat_get_vinfo(nilfs_dat_inode(nilfs), buf, size, nmembs);
	up_read(&nilfs->ns_segctor_sem);
	return ret;
}

static ssize_t
nilfs_ioctl_do_get_bdescs(struct the_nilfs *nilfs, __u64 *posp, int flags,
			  void *buf, size_t size, size_t nmembs)
{
	struct inode *dat = nilfs_dat_inode(nilfs);
	struct nilfs_bmap *bmap = NILFS_I(dat)->i_bmap;
	struct nilfs_bdesc *bdescs = buf;
	int ret, i;

	down_read(&nilfs->ns_segctor_sem);
	for (i = 0; i < nmembs; i++) {
		ret = nilfs_bmap_lookup_at_level(bmap,
						 bdescs[i].bd_offset,
						 bdescs[i].bd_level + 1,
						 &bdescs[i].bd_blocknr);
		if (ret < 0) {
			if (ret != -ENOENT) {
				up_read(&nilfs->ns_segctor_sem);
				return ret;
			}
			bdescs[i].bd_blocknr = 0;
		}
	}
	up_read(&nilfs->ns_segctor_sem);
	return nmembs;
}

static int nilfs_ioctl_get_bdescs(struct inode *inode, struct file *filp,
				  unsigned int cmd, void __user *argp)
{
	struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
	struct nilfs_argv argv;
	int ret;

	if (copy_from_user(&argv, argp, sizeof(argv)))
		return -EFAULT;

	if (argv.v_size != sizeof(struct nilfs_bdesc))
		return -EINVAL;

	ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd),
				    nilfs_ioctl_do_get_bdescs);
	if (ret < 0)
		return ret;

	if (copy_to_user(argp, &argv, sizeof(argv)))
		ret = -EFAULT;
	return ret;
}

static int nilfs_ioctl_move_inode_block(struct inode *inode,
					struct nilfs_vdesc *vdesc,
					struct list_head *buffers)
{
	struct buffer_head *bh;
	int ret;

	if (vdesc->vd_flags == 0)
		ret = nilfs_gccache_submit_read_data(
			inode, vdesc->vd_offset, vdesc->vd_blocknr,
			vdesc->vd_vblocknr, &bh);
	else
		ret = nilfs_gccache_submit_read_node(
			inode, vdesc->vd_blocknr, vdesc->vd_vblocknr, &bh);

	if (unlikely(ret < 0)) {
		if (ret == -ENOENT)
			printk(KERN_CRIT
			       "%s: invalid virtual block address (%s): "
			       "ino=%llu, cno=%llu, offset=%llu, "
			       "blocknr=%llu, vblocknr=%llu\n",
			       __func__, vdesc->vd_flags ? "node" : "data",
			       (unsigned long long)vdesc->vd_ino,
			       (unsigned long long)vdesc->vd_cno,
			       (unsigned long long)vdesc->vd_offset,
			       (unsigned long long)vdesc->vd_blocknr,
			       (unsigned long long)vdesc->vd_vblocknr);
		return ret;
	}
	if (unlikely(!list_empty(&bh->b_assoc_buffers))) {
		printk(KERN_CRIT "%s: conflicting %s buffer: ino=%llu, "
		       "cno=%llu, offset=%llu, blocknr=%llu, vblocknr=%llu\n",
		       __func__, vdesc->vd_flags ? "node" : "data",
		       (unsigned long long)vdesc->vd_ino,
		       (unsigned long long)vdesc->vd_cno,
		       (unsigned long long)vdesc->vd_offset,
		       (unsigned long long)vdesc->vd_blocknr,
		       (unsigned long long)vdesc->vd_vblocknr);
		brelse(bh);
		return -EEXIST;
	}
	list_add_tail(&bh->b_assoc_buffers, buffers);
	return 0;
}

static int nilfs_ioctl_move_blocks(struct the_nilfs *nilfs,
				   struct nilfs_argv *argv, void *buf)
{
	size_t nmembs = argv->v_nmembs;
	struct inode *inode;
	struct nilfs_vdesc *vdesc;
	struct buffer_head *bh, *n;
	LIST_HEAD(buffers);
	ino_t ino;
	__u64 cno;
	int i, ret;

	for (i = 0, vdesc = buf; i < nmembs; ) {
		ino = vdesc->vd_ino;
		cno = vdesc->vd_cno;
		inode = nilfs_gc_iget(nilfs, ino, cno);
		if (unlikely(inode == NULL)) {
			ret = -ENOMEM;
			goto failed;
		}
		do {
			ret = nilfs_ioctl_move_inode_block(inode, vdesc,
							   &buffers);
			if (unlikely(ret < 0))
				goto failed;
			vdesc++;
		} while (++i < nmembs &&
			 vdesc->vd_ino == ino && vdesc->vd_cno == cno);
	}

	list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) {
		ret = nilfs_gccache_wait_and_mark_dirty(bh);
		if (unlikely(ret < 0)) {
			WARN_ON(ret == -EEXIST);
			goto failed;
		}
		list_del_init(&bh->b_assoc_buffers);
		brelse(bh);
	}
	return nmembs;

 failed:
	list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) {
		list_del_init(&bh->b_assoc_buffers);
		brelse(bh);
	}
	return ret;
}

static int nilfs_ioctl_delete_checkpoints(struct the_nilfs *nilfs,
					  struct nilfs_argv *argv, void *buf)
{
	size_t nmembs = argv->v_nmembs;
	struct inode *cpfile = nilfs->ns_cpfile;
	struct nilfs_period *periods = buf;
	int ret, i;

	for (i = 0; i < nmembs; i++) {
		ret = nilfs_cpfile_delete_checkpoints(
			cpfile, periods[i].p_start, periods[i].p_end);
		if (ret < 0)
			return ret;
	}
	return nmembs;
}

static int nilfs_ioctl_free_vblocknrs(struct the_nilfs *nilfs,
				      struct nilfs_argv *argv, void *buf)
{
	size_t nmembs = argv->v_nmembs;
	int ret;

	ret = nilfs_dat_freev(nilfs_dat_inode(nilfs), buf, nmembs);

	return (ret < 0) ? ret : nmembs;
}

static int nilfs_ioctl_mark_blocks_dirty(struct the_nilfs *nilfs,
					 struct nilfs_argv *argv, void *buf)
{
	size_t nmembs = argv->v_nmembs;
	struct inode *dat = nilfs_dat_inode(nilfs);
	struct nilfs_bmap *bmap = NILFS_I(dat)->i_bmap;
	struct nilfs_bdesc *bdescs = buf;
	int ret, i;

	for (i = 0; i < nmembs; i++) {
		/* XXX: use macro or inline func to check liveness */
		ret = nilfs_bmap_lookup_at_level(bmap,
						 bdescs[i].bd_offset,
						 bdescs[i].bd_level + 1,
						 &bdescs[i].bd_blocknr);
		if (ret < 0) {
			if (ret != -ENOENT)
				return ret;
			bdescs[i].bd_blocknr = 0;
		}
		if (bdescs[i].bd_blocknr != bdescs[i].bd_oblocknr)
			/* skip dead block */
			continue;
		if (bdescs[i].bd_level == 0) {
			ret = nilfs_mdt_mark_block_dirty(dat,
							 bdescs[i].bd_offset);
			if (ret < 0) {
				WARN_ON(ret == -ENOENT);
				return ret;
			}
		} else {
			ret = nilfs_bmap_mark(bmap, bdescs[i].bd_offset,
					      bdescs[i].bd_level);
			if (ret < 0) {
				WARN_ON(ret == -ENOENT);
				return ret;
			}
		}
	}
	return nmembs;
}

int nilfs_ioctl_prepare_clean_segments(struct the_nilfs *nilfs,
				       struct nilfs_argv *argv, void **kbufs)
{
	const char *msg;
	int ret;

	ret = nilfs_ioctl_delete_checkpoints(nilfs, &argv[1], kbufs[1]);
	if (ret < 0) {
		/*
		 * can safely abort because checkpoints can be removed
		 * independently.
		 */
		msg = "cannot delete checkpoints";
		goto failed;
	}
	ret = nilfs_ioctl_free_vblocknrs(nilfs, &argv[2], kbufs[2]);
	if (ret < 0) {
		/*
		 * can safely abort because DAT file is updated atomically
		 * using a copy-on-write technique.
		 */
		msg = "cannot delete virtual blocks from DAT file";
		goto failed;
	}
	ret = nilfs_ioctl_mark_blocks_dirty(nilfs, &argv[3], kbufs[3]);
	if (ret < 0) {
		/*
		 * can safely abort because the operation is nondestructive.
		 */
		msg = "cannot mark copying blocks dirty";
		goto failed;
	}
	return 0;

 failed:
	nilfs_remove_all_gcinode(nilfs);
	printk(KERN_ERR "NILFS: GC failed during preparation: %s: err=%d\n",
	       msg, ret);
	return ret;
}

static int nilfs_ioctl_clean_segments(struct inode *inode, struct file *filp,
				      unsigned int cmd, void __user *argp)
{
	struct nilfs_argv argv[5];
	const static size_t argsz[5] = {
		sizeof(struct nilfs_vdesc),
		sizeof(struct nilfs_period),
		sizeof(__u64),
		sizeof(struct nilfs_bdesc),
		sizeof(__u64),
	};
	void __user *base;
	void *kbufs[5];
	struct the_nilfs *nilfs;
	size_t len, nsegs;
	int n, ret;

	if (!capable(CAP_SYS_ADMIN))
		return -EPERM;

	if (copy_from_user(argv, argp, sizeof(argv)))
		return -EFAULT;

	nsegs = argv[4].v_nmembs;
	if (argv[4].v_size != argsz[4])
		return -EINVAL;
	/*
	 * argv[4] points to segment numbers this ioctl cleans.  We
	 * use kmalloc() for its buffer because memory used for the
	 * segment numbers is enough small.
	 */
	kbufs[4] = memdup_user((void __user *)(unsigned long)argv[4].v_base,
			       nsegs * sizeof(__u64));
	if (IS_ERR(kbufs[4]))
		return PTR_ERR(kbufs[4]);

	nilfs = NILFS_SB(inode->i_sb)->s_nilfs;

	for (n = 0; n < 4; n++) {
		ret = -EINVAL;
		if (argv[n].v_size != argsz[n])
			goto out_free;

		if (argv[n].v_nmembs > nsegs * nilfs->ns_blocks_per_segment)
			goto out_free;

		len = argv[n].v_size * argv[n].v_nmembs;
		base = (void __user *)(unsigned long)argv[n].v_base;
		if (len == 0) {
			kbufs[n] = NULL;
			continue;
		}

		kbufs[n] = vmalloc(len);
		if (!kbufs[n]) {
			ret = -ENOMEM;
			goto out_free;
		}
		if (copy_from_user(kbufs[n], base, len)) {
			ret = -EFAULT;
			vfree(kbufs[n]);
			goto out_free;
		}
	}

	/*
	 * nilfs_ioctl_move_blocks() will call nilfs_gc_iget(),
	 * which will operates an inode list without blocking.
	 * To protect the list from concurrent operations,
	 * nilfs_ioctl_move_blocks should be atomic operation.
	 */
	if (test_and_set_bit(THE_NILFS_GC_RUNNING, &nilfs->ns_flags)) {
		ret = -EBUSY;
		goto out_free;
	}

	ret = nilfs_ioctl_move_blocks(nilfs, &argv[0], kbufs[0]);
	if (ret < 0)
		printk(KERN_ERR "NILFS: GC failed during preparation: "
			"cannot read source blocks: err=%d\n", ret);
	else
		ret = nilfs_clean_segments(inode->i_sb, argv, kbufs);

	clear_nilfs_gc_running(nilfs);

 out_free:
	while (--n >= 0)
		vfree(kbufs[n]);
	kfree(kbufs[4]);
	return ret;
}

static int nilfs_ioctl_sync(struct inode *inode, struct file *filp,
			    unsigned int cmd, void __user *argp)
{
	__u64 cno;
	int ret;

	ret = nilfs_construct_segment(inode->i_sb);
	if (ret < 0)
		return ret;

	if (argp != NULL) {
		cno = NILFS_SB(inode->i_sb)->s_nilfs->ns_cno - 1;
		if (copy_to_user(argp, &cno, sizeof(cno)))
			return -EFAULT;
	}
	return 0;
}

static int nilfs_ioctl_get_info(struct inode *inode, struct file *filp,
				unsigned int cmd, void __user *argp,
				size_t membsz,
				ssize_t (*dofunc)(struct the_nilfs *,
						  __u64 *, int,
						  void *, size_t, size_t))

{
	struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
	struct nilfs_argv argv;
	int ret;

	if (copy_from_user(&argv, argp, sizeof(argv)))
		return -EFAULT;

	if (argv.v_size < membsz)
		return -EINVAL;

	ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), dofunc);
	if (ret < 0)
		return ret;

	if (copy_to_user(argp, &argv, sizeof(argv)))
		ret = -EFAULT;
	return ret;
}

long nilfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
	struct inode *inode = filp->f_dentry->d_inode;
	void __user *argp = (void * __user *)arg;

	switch (cmd) {
	case NILFS_IOCTL_CHANGE_CPMODE:
		return nilfs_ioctl_change_cpmode(inode, filp, cmd, argp);
	case NILFS_IOCTL_DELETE_CHECKPOINT:
		return nilfs_ioctl_delete_checkpoint(inode, filp, cmd, argp);
	case NILFS_IOCTL_GET_CPINFO:
		return nilfs_ioctl_get_info(inode, filp, cmd, argp,
					    sizeof(struct nilfs_cpinfo),
					    nilfs_ioctl_do_get_cpinfo);
	case NILFS_IOCTL_GET_CPSTAT:
		return nilfs_ioctl_get_cpstat(inode, filp, cmd, argp);
	case NILFS_IOCTL_GET_SUINFO:
		return nilfs_ioctl_get_info(inode, filp, cmd, argp,
					    sizeof(struct nilfs_suinfo),
					    nilfs_ioctl_do_get_suinfo);
	case NILFS_IOCTL_GET_SUSTAT:
		return nilfs_ioctl_get_sustat(inode, filp, cmd, argp);
	case NILFS_IOCTL_GET_VINFO:
		return nilfs_ioctl_get_info(inode, filp, cmd, argp,
					    sizeof(struct nilfs_vinfo),
					    nilfs_ioctl_do_get_vinfo);
	case NILFS_IOCTL_GET_BDESCS:
		return nilfs_ioctl_get_bdescs(inode, filp, cmd, argp);
	case NILFS_IOCTL_CLEAN_SEGMENTS:
		return nilfs_ioctl_clean_segments(inode, filp, cmd, argp);
	case NILFS_IOCTL_SYNC:
		return nilfs_ioctl_sync(inode, filp, cmd, argp);
	default:
		return -ENOTTY;
	}
}