xref: /openbmc/linux/fs/nilfs2/ioctl.c (revision 82ced6fd)
1 /*
2  * ioctl.c - NILFS ioctl operations.
3  *
4  * Copyright (C) 2007, 2008 Nippon Telegraph and Telephone Corporation.
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
19  *
20  * Written by Koji Sato <koji@osrg.net>.
21  */
22 
23 #include <linux/fs.h>
24 #include <linux/wait.h>
25 #include <linux/smp_lock.h>	/* lock_kernel(), unlock_kernel() */
26 #include <linux/capability.h>	/* capable() */
27 #include <linux/uaccess.h>	/* copy_from_user(), copy_to_user() */
28 #include <linux/vmalloc.h>
29 #include <linux/nilfs2_fs.h>
30 #include "nilfs.h"
31 #include "segment.h"
32 #include "bmap.h"
33 #include "cpfile.h"
34 #include "sufile.h"
35 #include "dat.h"
36 
37 
38 static int nilfs_ioctl_wrap_copy(struct the_nilfs *nilfs,
39 				 struct nilfs_argv *argv, int dir,
40 				 ssize_t (*dofunc)(struct the_nilfs *,
41 						   __u64 *, int,
42 						   void *, size_t, size_t))
43 {
44 	void *buf;
45 	void __user *base = (void __user *)(unsigned long)argv->v_base;
46 	size_t maxmembs, total, n;
47 	ssize_t nr;
48 	int ret, i;
49 	__u64 pos, ppos;
50 
51 	if (argv->v_nmembs == 0)
52 		return 0;
53 
54 	if (argv->v_size > PAGE_SIZE)
55 		return -EINVAL;
56 
57 	buf = (void *)__get_free_pages(GFP_NOFS, 0);
58 	if (unlikely(!buf))
59 		return -ENOMEM;
60 	maxmembs = PAGE_SIZE / argv->v_size;
61 
62 	ret = 0;
63 	total = 0;
64 	pos = argv->v_index;
65 	for (i = 0; i < argv->v_nmembs; i += n) {
66 		n = (argv->v_nmembs - i < maxmembs) ?
67 			argv->v_nmembs - i : maxmembs;
68 		if ((dir & _IOC_WRITE) &&
69 		    copy_from_user(buf, base + argv->v_size * i,
70 				   argv->v_size * n)) {
71 			ret = -EFAULT;
72 			break;
73 		}
74 		ppos = pos;
75 		nr = dofunc(nilfs, &pos, argv->v_flags, buf, argv->v_size,
76 			       n);
77 		if (nr < 0) {
78 			ret = nr;
79 			break;
80 		}
81 		if ((dir & _IOC_READ) &&
82 		    copy_to_user(base + argv->v_size * i, buf,
83 				 argv->v_size * nr)) {
84 			ret = -EFAULT;
85 			break;
86 		}
87 		total += nr;
88 		if ((size_t)nr < n)
89 			break;
90 		if (pos == ppos)
91 			pos += n;
92 	}
93 	argv->v_nmembs = total;
94 
95 	free_pages((unsigned long)buf, 0);
96 	return ret;
97 }
98 
99 static int nilfs_ioctl_change_cpmode(struct inode *inode, struct file *filp,
100 				     unsigned int cmd, void __user *argp)
101 {
102 	struct inode *cpfile = NILFS_SB(inode->i_sb)->s_nilfs->ns_cpfile;
103 	struct nilfs_transaction_info ti;
104 	struct nilfs_cpmode cpmode;
105 	int ret;
106 
107 	if (!capable(CAP_SYS_ADMIN))
108 		return -EPERM;
109 	if (copy_from_user(&cpmode, argp, sizeof(cpmode)))
110 		return -EFAULT;
111 
112 	nilfs_transaction_begin(inode->i_sb, &ti, 0);
113 	ret = nilfs_cpfile_change_cpmode(
114 		cpfile, cpmode.cm_cno, cpmode.cm_mode);
115 	if (unlikely(ret < 0)) {
116 		nilfs_transaction_abort(inode->i_sb);
117 		return ret;
118 	}
119 	nilfs_transaction_commit(inode->i_sb); /* never fails */
120 	return ret;
121 }
122 
123 static int
124 nilfs_ioctl_delete_checkpoint(struct inode *inode, struct file *filp,
125 			      unsigned int cmd, void __user *argp)
126 {
127 	struct inode *cpfile = NILFS_SB(inode->i_sb)->s_nilfs->ns_cpfile;
128 	struct nilfs_transaction_info ti;
129 	__u64 cno;
130 	int ret;
131 
132 	if (!capable(CAP_SYS_ADMIN))
133 		return -EPERM;
134 	if (copy_from_user(&cno, argp, sizeof(cno)))
135 		return -EFAULT;
136 
137 	nilfs_transaction_begin(inode->i_sb, &ti, 0);
138 	ret = nilfs_cpfile_delete_checkpoint(cpfile, cno);
139 	if (unlikely(ret < 0)) {
140 		nilfs_transaction_abort(inode->i_sb);
141 		return ret;
142 	}
143 	nilfs_transaction_commit(inode->i_sb); /* never fails */
144 	return ret;
145 }
146 
147 static ssize_t
148 nilfs_ioctl_do_get_cpinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
149 			  void *buf, size_t size, size_t nmembs)
150 {
151 	int ret;
152 
153 	down_read(&nilfs->ns_segctor_sem);
154 	ret = nilfs_cpfile_get_cpinfo(nilfs->ns_cpfile, posp, flags, buf,
155 				      nmembs);
156 	up_read(&nilfs->ns_segctor_sem);
157 	return ret;
158 }
159 
160 static int nilfs_ioctl_get_cpstat(struct inode *inode, struct file *filp,
161 				  unsigned int cmd, void __user *argp)
162 {
163 	struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
164 	struct nilfs_cpstat cpstat;
165 	int ret;
166 
167 	down_read(&nilfs->ns_segctor_sem);
168 	ret = nilfs_cpfile_get_stat(nilfs->ns_cpfile, &cpstat);
169 	up_read(&nilfs->ns_segctor_sem);
170 	if (ret < 0)
171 		return ret;
172 
173 	if (copy_to_user(argp, &cpstat, sizeof(cpstat)))
174 		ret = -EFAULT;
175 	return ret;
176 }
177 
178 static ssize_t
179 nilfs_ioctl_do_get_suinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
180 			  void *buf, size_t size, size_t nmembs)
181 {
182 	int ret;
183 
184 	down_read(&nilfs->ns_segctor_sem);
185 	ret = nilfs_sufile_get_suinfo(nilfs->ns_sufile, *posp, buf, nmembs);
186 	up_read(&nilfs->ns_segctor_sem);
187 	return ret;
188 }
189 
190 static int nilfs_ioctl_get_sustat(struct inode *inode, struct file *filp,
191 				  unsigned int cmd, void __user *argp)
192 {
193 	struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
194 	struct nilfs_sustat sustat;
195 	int ret;
196 
197 	down_read(&nilfs->ns_segctor_sem);
198 	ret = nilfs_sufile_get_stat(nilfs->ns_sufile, &sustat);
199 	up_read(&nilfs->ns_segctor_sem);
200 	if (ret < 0)
201 		return ret;
202 
203 	if (copy_to_user(argp, &sustat, sizeof(sustat)))
204 		ret = -EFAULT;
205 	return ret;
206 }
207 
208 static ssize_t
209 nilfs_ioctl_do_get_vinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
210 			 void *buf, size_t size, size_t nmembs)
211 {
212 	int ret;
213 
214 	down_read(&nilfs->ns_segctor_sem);
215 	ret = nilfs_dat_get_vinfo(nilfs_dat_inode(nilfs), buf, nmembs);
216 	up_read(&nilfs->ns_segctor_sem);
217 	return ret;
218 }
219 
220 static ssize_t
221 nilfs_ioctl_do_get_bdescs(struct the_nilfs *nilfs, __u64 *posp, int flags,
222 			  void *buf, size_t size, size_t nmembs)
223 {
224 	struct inode *dat = nilfs_dat_inode(nilfs);
225 	struct nilfs_bmap *bmap = NILFS_I(dat)->i_bmap;
226 	struct nilfs_bdesc *bdescs = buf;
227 	int ret, i;
228 
229 	down_read(&nilfs->ns_segctor_sem);
230 	for (i = 0; i < nmembs; i++) {
231 		ret = nilfs_bmap_lookup_at_level(bmap,
232 						 bdescs[i].bd_offset,
233 						 bdescs[i].bd_level + 1,
234 						 &bdescs[i].bd_blocknr);
235 		if (ret < 0) {
236 			if (ret != -ENOENT) {
237 				up_read(&nilfs->ns_segctor_sem);
238 				return ret;
239 			}
240 			bdescs[i].bd_blocknr = 0;
241 		}
242 	}
243 	up_read(&nilfs->ns_segctor_sem);
244 	return nmembs;
245 }
246 
247 static int nilfs_ioctl_get_bdescs(struct inode *inode, struct file *filp,
248 				  unsigned int cmd, void __user *argp)
249 {
250 	struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
251 	struct nilfs_argv argv;
252 	int ret;
253 
254 	if (copy_from_user(&argv, argp, sizeof(argv)))
255 		return -EFAULT;
256 
257 	if (argv.v_size != sizeof(struct nilfs_bdesc))
258 		return -EINVAL;
259 
260 	ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd),
261 				    nilfs_ioctl_do_get_bdescs);
262 	if (ret < 0)
263 		return ret;
264 
265 	if (copy_to_user(argp, &argv, sizeof(argv)))
266 		ret = -EFAULT;
267 	return ret;
268 }
269 
270 static int nilfs_ioctl_move_inode_block(struct inode *inode,
271 					struct nilfs_vdesc *vdesc,
272 					struct list_head *buffers)
273 {
274 	struct buffer_head *bh;
275 	int ret;
276 
277 	if (vdesc->vd_flags == 0)
278 		ret = nilfs_gccache_submit_read_data(
279 			inode, vdesc->vd_offset, vdesc->vd_blocknr,
280 			vdesc->vd_vblocknr, &bh);
281 	else
282 		ret = nilfs_gccache_submit_read_node(
283 			inode, vdesc->vd_blocknr, vdesc->vd_vblocknr, &bh);
284 
285 	if (unlikely(ret < 0)) {
286 		if (ret == -ENOENT)
287 			printk(KERN_CRIT
288 			       "%s: invalid virtual block address (%s): "
289 			       "ino=%llu, cno=%llu, offset=%llu, "
290 			       "blocknr=%llu, vblocknr=%llu\n",
291 			       __func__, vdesc->vd_flags ? "node" : "data",
292 			       (unsigned long long)vdesc->vd_ino,
293 			       (unsigned long long)vdesc->vd_cno,
294 			       (unsigned long long)vdesc->vd_offset,
295 			       (unsigned long long)vdesc->vd_blocknr,
296 			       (unsigned long long)vdesc->vd_vblocknr);
297 		return ret;
298 	}
299 	bh->b_private = vdesc;
300 	list_add_tail(&bh->b_assoc_buffers, buffers);
301 	return 0;
302 }
303 
304 static int nilfs_ioctl_move_blocks(struct the_nilfs *nilfs,
305 				   struct nilfs_argv *argv, void *buf)
306 {
307 	size_t nmembs = argv->v_nmembs;
308 	struct inode *inode;
309 	struct nilfs_vdesc *vdesc;
310 	struct buffer_head *bh, *n;
311 	LIST_HEAD(buffers);
312 	ino_t ino;
313 	__u64 cno;
314 	int i, ret;
315 
316 	for (i = 0, vdesc = buf; i < nmembs; ) {
317 		ino = vdesc->vd_ino;
318 		cno = vdesc->vd_cno;
319 		inode = nilfs_gc_iget(nilfs, ino, cno);
320 		if (unlikely(inode == NULL)) {
321 			ret = -ENOMEM;
322 			goto failed;
323 		}
324 		do {
325 			ret = nilfs_ioctl_move_inode_block(inode, vdesc,
326 							   &buffers);
327 			if (unlikely(ret < 0))
328 				goto failed;
329 			vdesc++;
330 		} while (++i < nmembs &&
331 			 vdesc->vd_ino == ino && vdesc->vd_cno == cno);
332 	}
333 
334 	list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) {
335 		ret = nilfs_gccache_wait_and_mark_dirty(bh);
336 		if (unlikely(ret < 0)) {
337 			if (ret == -EEXIST) {
338 				vdesc = bh->b_private;
339 				printk(KERN_CRIT
340 				       "%s: conflicting %s buffer: "
341 				       "ino=%llu, cno=%llu, offset=%llu, "
342 				       "blocknr=%llu, vblocknr=%llu\n",
343 				       __func__,
344 				       vdesc->vd_flags ? "node" : "data",
345 				       (unsigned long long)vdesc->vd_ino,
346 				       (unsigned long long)vdesc->vd_cno,
347 				       (unsigned long long)vdesc->vd_offset,
348 				       (unsigned long long)vdesc->vd_blocknr,
349 				       (unsigned long long)vdesc->vd_vblocknr);
350 			}
351 			goto failed;
352 		}
353 		list_del_init(&bh->b_assoc_buffers);
354 		bh->b_private = NULL;
355 		brelse(bh);
356 	}
357 	return nmembs;
358 
359  failed:
360 	list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) {
361 		list_del_init(&bh->b_assoc_buffers);
362 		bh->b_private = NULL;
363 		brelse(bh);
364 	}
365 	return ret;
366 }
367 
368 static int nilfs_ioctl_delete_checkpoints(struct the_nilfs *nilfs,
369 					  struct nilfs_argv *argv, void *buf)
370 {
371 	size_t nmembs = argv->v_nmembs;
372 	struct inode *cpfile = nilfs->ns_cpfile;
373 	struct nilfs_period *periods = buf;
374 	int ret, i;
375 
376 	for (i = 0; i < nmembs; i++) {
377 		ret = nilfs_cpfile_delete_checkpoints(
378 			cpfile, periods[i].p_start, periods[i].p_end);
379 		if (ret < 0)
380 			return ret;
381 	}
382 	return nmembs;
383 }
384 
385 static int nilfs_ioctl_free_vblocknrs(struct the_nilfs *nilfs,
386 				      struct nilfs_argv *argv, void *buf)
387 {
388 	size_t nmembs = argv->v_nmembs;
389 	int ret;
390 
391 	ret = nilfs_dat_freev(nilfs_dat_inode(nilfs), buf, nmembs);
392 
393 	return (ret < 0) ? ret : nmembs;
394 }
395 
396 static int nilfs_ioctl_mark_blocks_dirty(struct the_nilfs *nilfs,
397 					 struct nilfs_argv *argv, void *buf)
398 {
399 	size_t nmembs = argv->v_nmembs;
400 	struct inode *dat = nilfs_dat_inode(nilfs);
401 	struct nilfs_bmap *bmap = NILFS_I(dat)->i_bmap;
402 	struct nilfs_bdesc *bdescs = buf;
403 	int ret, i;
404 
405 	for (i = 0; i < nmembs; i++) {
406 		/* XXX: use macro or inline func to check liveness */
407 		ret = nilfs_bmap_lookup_at_level(bmap,
408 						 bdescs[i].bd_offset,
409 						 bdescs[i].bd_level + 1,
410 						 &bdescs[i].bd_blocknr);
411 		if (ret < 0) {
412 			if (ret != -ENOENT)
413 				return ret;
414 			bdescs[i].bd_blocknr = 0;
415 		}
416 		if (bdescs[i].bd_blocknr != bdescs[i].bd_oblocknr)
417 			/* skip dead block */
418 			continue;
419 		if (bdescs[i].bd_level == 0) {
420 			ret = nilfs_mdt_mark_block_dirty(dat,
421 							 bdescs[i].bd_offset);
422 			if (ret < 0) {
423 				WARN_ON(ret == -ENOENT);
424 				return ret;
425 			}
426 		} else {
427 			ret = nilfs_bmap_mark(bmap, bdescs[i].bd_offset,
428 					      bdescs[i].bd_level);
429 			if (ret < 0) {
430 				WARN_ON(ret == -ENOENT);
431 				return ret;
432 			}
433 		}
434 	}
435 	return nmembs;
436 }
437 
438 static int nilfs_ioctl_free_segments(struct the_nilfs *nilfs,
439 				     struct nilfs_argv *argv, void *buf)
440 {
441 	size_t nmembs = argv->v_nmembs;
442 	struct nilfs_sb_info *sbi = nilfs->ns_writer;
443 	int ret;
444 
445 	if (unlikely(!sbi)) {
446 		/* never happens because called for a writable mount */
447 		WARN_ON(1);
448 		return -EROFS;
449 	}
450 	ret = nilfs_segctor_add_segments_to_be_freed(
451 		NILFS_SC(sbi), buf, nmembs);
452 
453 	return (ret < 0) ? ret : nmembs;
454 }
455 
456 int nilfs_ioctl_prepare_clean_segments(struct the_nilfs *nilfs,
457 				       struct nilfs_argv *argv, void **kbufs)
458 {
459 	const char *msg;
460 	int ret;
461 
462 	ret = nilfs_ioctl_move_blocks(nilfs, &argv[0], kbufs[0]);
463 	if (ret < 0) {
464 		msg = "cannot read source blocks";
465 		goto failed;
466 	}
467 
468 	ret = nilfs_ioctl_delete_checkpoints(nilfs, &argv[1], kbufs[1]);
469 	if (ret < 0) {
470 		/*
471 		 * can safely abort because checkpoints can be removed
472 		 * independently.
473 		 */
474 		msg = "cannot delete checkpoints";
475 		goto failed;
476 	}
477 	ret = nilfs_ioctl_free_vblocknrs(nilfs, &argv[2], kbufs[2]);
478 	if (ret < 0) {
479 		/*
480 		 * can safely abort because DAT file is updated atomically
481 		 * using a copy-on-write technique.
482 		 */
483 		msg = "cannot delete virtual blocks from DAT file";
484 		goto failed;
485 	}
486 	ret = nilfs_ioctl_mark_blocks_dirty(nilfs, &argv[3], kbufs[3]);
487 	if (ret < 0) {
488 		/*
489 		 * can safely abort because the operation is nondestructive.
490 		 */
491 		msg = "cannot mark copying blocks dirty";
492 		goto failed;
493 	}
494 	ret = nilfs_ioctl_free_segments(nilfs, &argv[4], kbufs[4]);
495 	if (ret < 0) {
496 		/*
497 		 * can safely abort because this operation is atomic.
498 		 */
499 		msg = "cannot set segments to be freed";
500 		goto failed;
501 	}
502 	return 0;
503 
504  failed:
505 	nilfs_remove_all_gcinode(nilfs);
506 	printk(KERN_ERR "NILFS: GC failed during preparation: %s: err=%d\n",
507 	       msg, ret);
508 	return ret;
509 }
510 
511 static int nilfs_ioctl_clean_segments(struct inode *inode, struct file *filp,
512 				      unsigned int cmd, void __user *argp)
513 {
514 	struct nilfs_argv argv[5];
515 	const static size_t argsz[5] = {
516 		sizeof(struct nilfs_vdesc),
517 		sizeof(struct nilfs_period),
518 		sizeof(__u64),
519 		sizeof(struct nilfs_bdesc),
520 		sizeof(__u64),
521 	};
522 	void __user *base;
523 	void *kbufs[5];
524 	struct the_nilfs *nilfs;
525 	size_t len, nsegs;
526 	int n, ret;
527 
528 	if (!capable(CAP_SYS_ADMIN))
529 		return -EPERM;
530 
531 	if (copy_from_user(argv, argp, sizeof(argv)))
532 		return -EFAULT;
533 
534 	nsegs = argv[4].v_nmembs;
535 	if (argv[4].v_size != argsz[4])
536 		return -EINVAL;
537 	/*
538 	 * argv[4] points to segment numbers this ioctl cleans.  We
539 	 * use kmalloc() for its buffer because memory used for the
540 	 * segment numbers is enough small.
541 	 */
542 	kbufs[4] = memdup_user((void __user *)(unsigned long)argv[4].v_base,
543 			       nsegs * sizeof(__u64));
544 	if (IS_ERR(kbufs[4]))
545 		return PTR_ERR(kbufs[4]);
546 
547 	nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
548 
549 	for (n = 0; n < 4; n++) {
550 		ret = -EINVAL;
551 		if (argv[n].v_size != argsz[n])
552 			goto out_free;
553 
554 		if (argv[n].v_nmembs > nsegs * nilfs->ns_blocks_per_segment)
555 			goto out_free;
556 
557 		len = argv[n].v_size * argv[n].v_nmembs;
558 		base = (void __user *)(unsigned long)argv[n].v_base;
559 		if (len == 0) {
560 			kbufs[n] = NULL;
561 			continue;
562 		}
563 
564 		kbufs[n] = vmalloc(len);
565 		if (!kbufs[n]) {
566 			ret = -ENOMEM;
567 			goto out_free;
568 		}
569 		if (copy_from_user(kbufs[n], base, len)) {
570 			ret = -EFAULT;
571 			vfree(kbufs[n]);
572 			goto out_free;
573 		}
574 	}
575 
576 	ret = nilfs_clean_segments(inode->i_sb, argv, kbufs);
577 
578  out_free:
579 	while (--n >= 0)
580 		vfree(kbufs[n]);
581 	kfree(kbufs[4]);
582 	return ret;
583 }
584 
585 static int nilfs_ioctl_sync(struct inode *inode, struct file *filp,
586 			    unsigned int cmd, void __user *argp)
587 {
588 	__u64 cno;
589 	int ret;
590 
591 	ret = nilfs_construct_segment(inode->i_sb);
592 	if (ret < 0)
593 		return ret;
594 
595 	if (argp != NULL) {
596 		cno = NILFS_SB(inode->i_sb)->s_nilfs->ns_cno - 1;
597 		if (copy_to_user(argp, &cno, sizeof(cno)))
598 			return -EFAULT;
599 	}
600 	return 0;
601 }
602 
603 static int nilfs_ioctl_get_info(struct inode *inode, struct file *filp,
604 				unsigned int cmd, void __user *argp,
605 				size_t membsz,
606 				ssize_t (*dofunc)(struct the_nilfs *,
607 						  __u64 *, int,
608 						  void *, size_t, size_t))
609 
610 {
611 	struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
612 	struct nilfs_argv argv;
613 	int ret;
614 
615 	if (copy_from_user(&argv, argp, sizeof(argv)))
616 		return -EFAULT;
617 
618 	if (argv.v_size != membsz)
619 		return -EINVAL;
620 
621 	ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), dofunc);
622 	if (ret < 0)
623 		return ret;
624 
625 	if (copy_to_user(argp, &argv, sizeof(argv)))
626 		ret = -EFAULT;
627 	return ret;
628 }
629 
630 long nilfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
631 {
632 	struct inode *inode = filp->f_dentry->d_inode;
633 	void __user *argp = (void * __user *)arg;
634 
635 	switch (cmd) {
636 	case NILFS_IOCTL_CHANGE_CPMODE:
637 		return nilfs_ioctl_change_cpmode(inode, filp, cmd, argp);
638 	case NILFS_IOCTL_DELETE_CHECKPOINT:
639 		return nilfs_ioctl_delete_checkpoint(inode, filp, cmd, argp);
640 	case NILFS_IOCTL_GET_CPINFO:
641 		return nilfs_ioctl_get_info(inode, filp, cmd, argp,
642 					    sizeof(struct nilfs_cpinfo),
643 					    nilfs_ioctl_do_get_cpinfo);
644 	case NILFS_IOCTL_GET_CPSTAT:
645 		return nilfs_ioctl_get_cpstat(inode, filp, cmd, argp);
646 	case NILFS_IOCTL_GET_SUINFO:
647 		return nilfs_ioctl_get_info(inode, filp, cmd, argp,
648 					    sizeof(struct nilfs_suinfo),
649 					    nilfs_ioctl_do_get_suinfo);
650 	case NILFS_IOCTL_GET_SUSTAT:
651 		return nilfs_ioctl_get_sustat(inode, filp, cmd, argp);
652 	case NILFS_IOCTL_GET_VINFO:
653 		return nilfs_ioctl_get_info(inode, filp, cmd, argp,
654 					    sizeof(struct nilfs_vinfo),
655 					    nilfs_ioctl_do_get_vinfo);
656 	case NILFS_IOCTL_GET_BDESCS:
657 		return nilfs_ioctl_get_bdescs(inode, filp, cmd, argp);
658 	case NILFS_IOCTL_CLEAN_SEGMENTS:
659 		return nilfs_ioctl_clean_segments(inode, filp, cmd, argp);
660 	case NILFS_IOCTL_SYNC:
661 		return nilfs_ioctl_sync(inode, filp, cmd, argp);
662 	default:
663 		return -ENOTTY;
664 	}
665 }
666