e00d9457c256179279b141868d6ed86494dec24e
[linux-2.6.git] / fs / nilfs2 / ioctl.c
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/slab.h>
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/mount.h>        /* mnt_want_write(), mnt_drop_write() */
30 #include <linux/nilfs2_fs.h>
31 #include "nilfs.h"
32 #include "segment.h"
33 #include "bmap.h"
34 #include "cpfile.h"
35 #include "sufile.h"
36 #include "dat.h"
37
38
39 static int nilfs_ioctl_wrap_copy(struct the_nilfs *nilfs,
40                                  struct nilfs_argv *argv, int dir,
41                                  ssize_t (*dofunc)(struct the_nilfs *,
42                                                    __u64 *, int,
43                                                    void *, size_t, size_t))
44 {
45         void *buf;
46         void __user *base = (void __user *)(unsigned long)argv->v_base;
47         size_t maxmembs, total, n;
48         ssize_t nr;
49         int ret, i;
50         __u64 pos, ppos;
51
52         if (argv->v_nmembs == 0)
53                 return 0;
54
55         if (argv->v_size > PAGE_SIZE)
56                 return -EINVAL;
57
58         buf = (void *)__get_free_pages(GFP_NOFS, 0);
59         if (unlikely(!buf))
60                 return -ENOMEM;
61         maxmembs = PAGE_SIZE / argv->v_size;
62
63         ret = 0;
64         total = 0;
65         pos = argv->v_index;
66         for (i = 0; i < argv->v_nmembs; i += n) {
67                 n = (argv->v_nmembs - i < maxmembs) ?
68                         argv->v_nmembs - i : maxmembs;
69                 if ((dir & _IOC_WRITE) &&
70                     copy_from_user(buf, base + argv->v_size * i,
71                                    argv->v_size * n)) {
72                         ret = -EFAULT;
73                         break;
74                 }
75                 ppos = pos;
76                 nr = dofunc(nilfs, &pos, argv->v_flags, buf, argv->v_size,
77                                n);
78                 if (nr < 0) {
79                         ret = nr;
80                         break;
81                 }
82                 if ((dir & _IOC_READ) &&
83                     copy_to_user(base + argv->v_size * i, buf,
84                                  argv->v_size * nr)) {
85                         ret = -EFAULT;
86                         break;
87                 }
88                 total += nr;
89                 if ((size_t)nr < n)
90                         break;
91                 if (pos == ppos)
92                         pos += n;
93         }
94         argv->v_nmembs = total;
95
96         free_pages((unsigned long)buf, 0);
97         return ret;
98 }
99
100 static int nilfs_ioctl_change_cpmode(struct inode *inode, struct file *filp,
101                                      unsigned int cmd, void __user *argp)
102 {
103         struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
104         struct inode *cpfile = nilfs->ns_cpfile;
105         struct nilfs_transaction_info ti;
106         struct nilfs_cpmode cpmode;
107         int ret;
108
109         if (!capable(CAP_SYS_ADMIN))
110                 return -EPERM;
111
112         ret = mnt_want_write(filp->f_path.mnt);
113         if (ret)
114                 return ret;
115
116         ret = -EFAULT;
117         if (copy_from_user(&cpmode, argp, sizeof(cpmode)))
118                 goto out;
119
120         down_read(&inode->i_sb->s_umount);
121
122         nilfs_transaction_begin(inode->i_sb, &ti, 0);
123         ret = nilfs_cpfile_change_cpmode(
124                 cpfile, cpmode.cm_cno, cpmode.cm_mode);
125         if (unlikely(ret < 0))
126                 nilfs_transaction_abort(inode->i_sb);
127         else
128                 nilfs_transaction_commit(inode->i_sb); /* never fails */
129
130         up_read(&inode->i_sb->s_umount);
131 out:
132         mnt_drop_write(filp->f_path.mnt);
133         return ret;
134 }
135
136 static int
137 nilfs_ioctl_delete_checkpoint(struct inode *inode, struct file *filp,
138                               unsigned int cmd, void __user *argp)
139 {
140         struct inode *cpfile = NILFS_SB(inode->i_sb)->s_nilfs->ns_cpfile;
141         struct nilfs_transaction_info ti;
142         __u64 cno;
143         int ret;
144
145         if (!capable(CAP_SYS_ADMIN))
146                 return -EPERM;
147
148         ret = mnt_want_write(filp->f_path.mnt);
149         if (ret)
150                 return ret;
151
152         ret = -EFAULT;
153         if (copy_from_user(&cno, argp, sizeof(cno)))
154                 goto out;
155
156         nilfs_transaction_begin(inode->i_sb, &ti, 0);
157         ret = nilfs_cpfile_delete_checkpoint(cpfile, cno);
158         if (unlikely(ret < 0))
159                 nilfs_transaction_abort(inode->i_sb);
160         else
161                 nilfs_transaction_commit(inode->i_sb); /* never fails */
162 out:
163         mnt_drop_write(filp->f_path.mnt);
164         return ret;
165 }
166
167 static ssize_t
168 nilfs_ioctl_do_get_cpinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
169                           void *buf, size_t size, size_t nmembs)
170 {
171         int ret;
172
173         down_read(&nilfs->ns_segctor_sem);
174         ret = nilfs_cpfile_get_cpinfo(nilfs->ns_cpfile, posp, flags, buf,
175                                       size, nmembs);
176         up_read(&nilfs->ns_segctor_sem);
177         return ret;
178 }
179
180 static int nilfs_ioctl_get_cpstat(struct inode *inode, struct file *filp,
181                                   unsigned int cmd, void __user *argp)
182 {
183         struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
184         struct nilfs_cpstat cpstat;
185         int ret;
186
187         down_read(&nilfs->ns_segctor_sem);
188         ret = nilfs_cpfile_get_stat(nilfs->ns_cpfile, &cpstat);
189         up_read(&nilfs->ns_segctor_sem);
190         if (ret < 0)
191                 return ret;
192
193         if (copy_to_user(argp, &cpstat, sizeof(cpstat)))
194                 ret = -EFAULT;
195         return ret;
196 }
197
198 static ssize_t
199 nilfs_ioctl_do_get_suinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
200                           void *buf, size_t size, size_t nmembs)
201 {
202         int ret;
203
204         down_read(&nilfs->ns_segctor_sem);
205         ret = nilfs_sufile_get_suinfo(nilfs->ns_sufile, *posp, buf, size,
206                                       nmembs);
207         up_read(&nilfs->ns_segctor_sem);
208         return ret;
209 }
210
211 static int nilfs_ioctl_get_sustat(struct inode *inode, struct file *filp,
212                                   unsigned int cmd, void __user *argp)
213 {
214         struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
215         struct nilfs_sustat sustat;
216         int ret;
217
218         down_read(&nilfs->ns_segctor_sem);
219         ret = nilfs_sufile_get_stat(nilfs->ns_sufile, &sustat);
220         up_read(&nilfs->ns_segctor_sem);
221         if (ret < 0)
222                 return ret;
223
224         if (copy_to_user(argp, &sustat, sizeof(sustat)))
225                 ret = -EFAULT;
226         return ret;
227 }
228
229 static ssize_t
230 nilfs_ioctl_do_get_vinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
231                          void *buf, size_t size, size_t nmembs)
232 {
233         int ret;
234
235         down_read(&nilfs->ns_segctor_sem);
236         ret = nilfs_dat_get_vinfo(nilfs_dat_inode(nilfs), buf, size, nmembs);
237         up_read(&nilfs->ns_segctor_sem);
238         return ret;
239 }
240
241 static ssize_t
242 nilfs_ioctl_do_get_bdescs(struct the_nilfs *nilfs, __u64 *posp, int flags,
243                           void *buf, size_t size, size_t nmembs)
244 {
245         struct inode *dat = nilfs_dat_inode(nilfs);
246         struct nilfs_bmap *bmap = NILFS_I(dat)->i_bmap;
247         struct nilfs_bdesc *bdescs = buf;
248         int ret, i;
249
250         down_read(&nilfs->ns_segctor_sem);
251         for (i = 0; i < nmembs; i++) {
252                 ret = nilfs_bmap_lookup_at_level(bmap,
253                                                  bdescs[i].bd_offset,
254                                                  bdescs[i].bd_level + 1,
255                                                  &bdescs[i].bd_blocknr);
256                 if (ret < 0) {
257                         if (ret != -ENOENT) {
258                                 up_read(&nilfs->ns_segctor_sem);
259                                 return ret;
260                         }
261                         bdescs[i].bd_blocknr = 0;
262                 }
263         }
264         up_read(&nilfs->ns_segctor_sem);
265         return nmembs;
266 }
267
268 static int nilfs_ioctl_get_bdescs(struct inode *inode, struct file *filp,
269                                   unsigned int cmd, void __user *argp)
270 {
271         struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
272         struct nilfs_argv argv;
273         int ret;
274
275         if (copy_from_user(&argv, argp, sizeof(argv)))
276                 return -EFAULT;
277
278         if (argv.v_size != sizeof(struct nilfs_bdesc))
279                 return -EINVAL;
280
281         ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd),
282                                     nilfs_ioctl_do_get_bdescs);
283         if (ret < 0)
284                 return ret;
285
286         if (copy_to_user(argp, &argv, sizeof(argv)))
287                 ret = -EFAULT;
288         return ret;
289 }
290
291 static int nilfs_ioctl_move_inode_block(struct inode *inode,
292                                         struct nilfs_vdesc *vdesc,
293                                         struct list_head *buffers)
294 {
295         struct buffer_head *bh;
296         int ret;
297
298         if (vdesc->vd_flags == 0)
299                 ret = nilfs_gccache_submit_read_data(
300                         inode, vdesc->vd_offset, vdesc->vd_blocknr,
301                         vdesc->vd_vblocknr, &bh);
302         else
303                 ret = nilfs_gccache_submit_read_node(
304                         inode, vdesc->vd_blocknr, vdesc->vd_vblocknr, &bh);
305
306         if (unlikely(ret < 0)) {
307                 if (ret == -ENOENT)
308                         printk(KERN_CRIT
309                                "%s: invalid virtual block address (%s): "
310                                "ino=%llu, cno=%llu, offset=%llu, "
311                                "blocknr=%llu, vblocknr=%llu\n",
312                                __func__, vdesc->vd_flags ? "node" : "data",
313                                (unsigned long long)vdesc->vd_ino,
314                                (unsigned long long)vdesc->vd_cno,
315                                (unsigned long long)vdesc->vd_offset,
316                                (unsigned long long)vdesc->vd_blocknr,
317                                (unsigned long long)vdesc->vd_vblocknr);
318                 return ret;
319         }
320         if (unlikely(!list_empty(&bh->b_assoc_buffers))) {
321                 printk(KERN_CRIT "%s: conflicting %s buffer: ino=%llu, "
322                        "cno=%llu, offset=%llu, blocknr=%llu, vblocknr=%llu\n",
323                        __func__, vdesc->vd_flags ? "node" : "data",
324                        (unsigned long long)vdesc->vd_ino,
325                        (unsigned long long)vdesc->vd_cno,
326                        (unsigned long long)vdesc->vd_offset,
327                        (unsigned long long)vdesc->vd_blocknr,
328                        (unsigned long long)vdesc->vd_vblocknr);
329                 brelse(bh);
330                 return -EEXIST;
331         }
332         list_add_tail(&bh->b_assoc_buffers, buffers);
333         return 0;
334 }
335
336 static int nilfs_ioctl_move_blocks(struct super_block *sb,
337                                    struct nilfs_argv *argv, void *buf)
338 {
339         size_t nmembs = argv->v_nmembs;
340         struct inode *inode;
341         struct nilfs_vdesc *vdesc;
342         struct buffer_head *bh, *n;
343         LIST_HEAD(buffers);
344         ino_t ino;
345         __u64 cno;
346         int i, ret;
347
348         for (i = 0, vdesc = buf; i < nmembs; ) {
349                 ino = vdesc->vd_ino;
350                 cno = vdesc->vd_cno;
351                 inode = nilfs_iget_for_gc(sb, ino, cno);
352                 if (IS_ERR(inode)) {
353                         ret = PTR_ERR(inode);
354                         goto failed;
355                 }
356                 do {
357                         ret = nilfs_ioctl_move_inode_block(inode, vdesc,
358                                                            &buffers);
359                         if (unlikely(ret < 0)) {
360                                 iput(inode);
361                                 goto failed;
362                         }
363                         vdesc++;
364                 } while (++i < nmembs &&
365                          vdesc->vd_ino == ino && vdesc->vd_cno == cno);
366
367                 iput(inode); /* The inode still remains in GC inode list */
368         }
369
370         list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) {
371                 ret = nilfs_gccache_wait_and_mark_dirty(bh);
372                 if (unlikely(ret < 0)) {
373                         WARN_ON(ret == -EEXIST);
374                         goto failed;
375                 }
376                 list_del_init(&bh->b_assoc_buffers);
377                 brelse(bh);
378         }
379         return nmembs;
380
381  failed:
382         list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) {
383                 list_del_init(&bh->b_assoc_buffers);
384                 brelse(bh);
385         }
386         return ret;
387 }
388
389 static int nilfs_ioctl_delete_checkpoints(struct the_nilfs *nilfs,
390                                           struct nilfs_argv *argv, void *buf)
391 {
392         size_t nmembs = argv->v_nmembs;
393         struct inode *cpfile = nilfs->ns_cpfile;
394         struct nilfs_period *periods = buf;
395         int ret, i;
396
397         for (i = 0; i < nmembs; i++) {
398                 ret = nilfs_cpfile_delete_checkpoints(
399                         cpfile, periods[i].p_start, periods[i].p_end);
400                 if (ret < 0)
401                         return ret;
402         }
403         return nmembs;
404 }
405
406 static int nilfs_ioctl_free_vblocknrs(struct the_nilfs *nilfs,
407                                       struct nilfs_argv *argv, void *buf)
408 {
409         size_t nmembs = argv->v_nmembs;
410         int ret;
411
412         ret = nilfs_dat_freev(nilfs_dat_inode(nilfs), buf, nmembs);
413
414         return (ret < 0) ? ret : nmembs;
415 }
416
417 static int nilfs_ioctl_mark_blocks_dirty(struct the_nilfs *nilfs,
418                                          struct nilfs_argv *argv, void *buf)
419 {
420         size_t nmembs = argv->v_nmembs;
421         struct inode *dat = nilfs_dat_inode(nilfs);
422         struct nilfs_bmap *bmap = NILFS_I(dat)->i_bmap;
423         struct nilfs_bdesc *bdescs = buf;
424         int ret, i;
425
426         for (i = 0; i < nmembs; i++) {
427                 /* XXX: use macro or inline func to check liveness */
428                 ret = nilfs_bmap_lookup_at_level(bmap,
429                                                  bdescs[i].bd_offset,
430                                                  bdescs[i].bd_level + 1,
431                                                  &bdescs[i].bd_blocknr);
432                 if (ret < 0) {
433                         if (ret != -ENOENT)
434                                 return ret;
435                         bdescs[i].bd_blocknr = 0;
436                 }
437                 if (bdescs[i].bd_blocknr != bdescs[i].bd_oblocknr)
438                         /* skip dead block */
439                         continue;
440                 if (bdescs[i].bd_level == 0) {
441                         ret = nilfs_mdt_mark_block_dirty(dat,
442                                                          bdescs[i].bd_offset);
443                         if (ret < 0) {
444                                 WARN_ON(ret == -ENOENT);
445                                 return ret;
446                         }
447                 } else {
448                         ret = nilfs_bmap_mark(bmap, bdescs[i].bd_offset,
449                                               bdescs[i].bd_level);
450                         if (ret < 0) {
451                                 WARN_ON(ret == -ENOENT);
452                                 return ret;
453                         }
454                 }
455         }
456         return nmembs;
457 }
458
459 int nilfs_ioctl_prepare_clean_segments(struct the_nilfs *nilfs,
460                                        struct nilfs_argv *argv, void **kbufs)
461 {
462         const char *msg;
463         int ret;
464
465         ret = nilfs_ioctl_delete_checkpoints(nilfs, &argv[1], kbufs[1]);
466         if (ret < 0) {
467                 /*
468                  * can safely abort because checkpoints can be removed
469                  * independently.
470                  */
471                 msg = "cannot delete checkpoints";
472                 goto failed;
473         }
474         ret = nilfs_ioctl_free_vblocknrs(nilfs, &argv[2], kbufs[2]);
475         if (ret < 0) {
476                 /*
477                  * can safely abort because DAT file is updated atomically
478                  * using a copy-on-write technique.
479                  */
480                 msg = "cannot delete virtual blocks from DAT file";
481                 goto failed;
482         }
483         ret = nilfs_ioctl_mark_blocks_dirty(nilfs, &argv[3], kbufs[3]);
484         if (ret < 0) {
485                 /*
486                  * can safely abort because the operation is nondestructive.
487                  */
488                 msg = "cannot mark copying blocks dirty";
489                 goto failed;
490         }
491         return 0;
492
493  failed:
494         printk(KERN_ERR "NILFS: GC failed during preparation: %s: err=%d\n",
495                msg, ret);
496         return ret;
497 }
498
499 static int nilfs_ioctl_clean_segments(struct inode *inode, struct file *filp,
500                                       unsigned int cmd, void __user *argp)
501 {
502         struct nilfs_argv argv[5];
503         static const size_t argsz[5] = {
504                 sizeof(struct nilfs_vdesc),
505                 sizeof(struct nilfs_period),
506                 sizeof(__u64),
507                 sizeof(struct nilfs_bdesc),
508                 sizeof(__u64),
509         };
510         void __user *base;
511         void *kbufs[5];
512         struct the_nilfs *nilfs;
513         size_t len, nsegs;
514         int n, ret;
515
516         if (!capable(CAP_SYS_ADMIN))
517                 return -EPERM;
518
519         ret = mnt_want_write(filp->f_path.mnt);
520         if (ret)
521                 return ret;
522
523         ret = -EFAULT;
524         if (copy_from_user(argv, argp, sizeof(argv)))
525                 goto out;
526
527         ret = -EINVAL;
528         nsegs = argv[4].v_nmembs;
529         if (argv[4].v_size != argsz[4])
530                 goto out;
531
532         /*
533          * argv[4] points to segment numbers this ioctl cleans.  We
534          * use kmalloc() for its buffer because memory used for the
535          * segment numbers is enough small.
536          */
537         kbufs[4] = memdup_user((void __user *)(unsigned long)argv[4].v_base,
538                                nsegs * sizeof(__u64));
539         if (IS_ERR(kbufs[4])) {
540                 ret = PTR_ERR(kbufs[4]);
541                 goto out;
542         }
543         nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
544
545         for (n = 0; n < 4; n++) {
546                 ret = -EINVAL;
547                 if (argv[n].v_size != argsz[n])
548                         goto out_free;
549
550                 if (argv[n].v_nmembs > nsegs * nilfs->ns_blocks_per_segment)
551                         goto out_free;
552
553                 len = argv[n].v_size * argv[n].v_nmembs;
554                 base = (void __user *)(unsigned long)argv[n].v_base;
555                 if (len == 0) {
556                         kbufs[n] = NULL;
557                         continue;
558                 }
559
560                 kbufs[n] = vmalloc(len);
561                 if (!kbufs[n]) {
562                         ret = -ENOMEM;
563                         goto out_free;
564                 }
565                 if (copy_from_user(kbufs[n], base, len)) {
566                         ret = -EFAULT;
567                         vfree(kbufs[n]);
568                         goto out_free;
569                 }
570         }
571
572         /*
573          * nilfs_ioctl_move_blocks() will call nilfs_iget_for_gc(),
574          * which will operates an inode list without blocking.
575          * To protect the list from concurrent operations,
576          * nilfs_ioctl_move_blocks should be atomic operation.
577          */
578         if (test_and_set_bit(THE_NILFS_GC_RUNNING, &nilfs->ns_flags)) {
579                 ret = -EBUSY;
580                 goto out_free;
581         }
582
583         vfs_check_frozen(inode->i_sb, SB_FREEZE_WRITE);
584
585         ret = nilfs_ioctl_move_blocks(inode->i_sb, &argv[0], kbufs[0]);
586         if (ret < 0)
587                 printk(KERN_ERR "NILFS: GC failed during preparation: "
588                         "cannot read source blocks: err=%d\n", ret);
589         else
590                 ret = nilfs_clean_segments(inode->i_sb, argv, kbufs);
591
592         nilfs_remove_all_gcinodes(nilfs);
593         clear_nilfs_gc_running(nilfs);
594
595 out_free:
596         while (--n >= 0)
597                 vfree(kbufs[n]);
598         kfree(kbufs[4]);
599 out:
600         mnt_drop_write(filp->f_path.mnt);
601         return ret;
602 }
603
604 static int nilfs_ioctl_sync(struct inode *inode, struct file *filp,
605                             unsigned int cmd, void __user *argp)
606 {
607         __u64 cno;
608         int ret;
609         struct the_nilfs *nilfs;
610
611         ret = nilfs_construct_segment(inode->i_sb);
612         if (ret < 0)
613                 return ret;
614
615         if (argp != NULL) {
616                 nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
617                 down_read(&nilfs->ns_segctor_sem);
618                 cno = nilfs->ns_cno - 1;
619                 up_read(&nilfs->ns_segctor_sem);
620                 if (copy_to_user(argp, &cno, sizeof(cno)))
621                         return -EFAULT;
622         }
623         return 0;
624 }
625
626 static int nilfs_ioctl_get_info(struct inode *inode, struct file *filp,
627                                 unsigned int cmd, void __user *argp,
628                                 size_t membsz,
629                                 ssize_t (*dofunc)(struct the_nilfs *,
630                                                   __u64 *, int,
631                                                   void *, size_t, size_t))
632
633 {
634         struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
635         struct nilfs_argv argv;
636         int ret;
637
638         if (copy_from_user(&argv, argp, sizeof(argv)))
639                 return -EFAULT;
640
641         if (argv.v_size < membsz)
642                 return -EINVAL;
643
644         ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), dofunc);
645         if (ret < 0)
646                 return ret;
647
648         if (copy_to_user(argp, &argv, sizeof(argv)))
649                 ret = -EFAULT;
650         return ret;
651 }
652
653 long nilfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
654 {
655         struct inode *inode = filp->f_dentry->d_inode;
656         void __user *argp = (void __user *)arg;
657
658         switch (cmd) {
659         case NILFS_IOCTL_CHANGE_CPMODE:
660                 return nilfs_ioctl_change_cpmode(inode, filp, cmd, argp);
661         case NILFS_IOCTL_DELETE_CHECKPOINT:
662                 return nilfs_ioctl_delete_checkpoint(inode, filp, cmd, argp);
663         case NILFS_IOCTL_GET_CPINFO:
664                 return nilfs_ioctl_get_info(inode, filp, cmd, argp,
665                                             sizeof(struct nilfs_cpinfo),
666                                             nilfs_ioctl_do_get_cpinfo);
667         case NILFS_IOCTL_GET_CPSTAT:
668                 return nilfs_ioctl_get_cpstat(inode, filp, cmd, argp);
669         case NILFS_IOCTL_GET_SUINFO:
670                 return nilfs_ioctl_get_info(inode, filp, cmd, argp,
671                                             sizeof(struct nilfs_suinfo),
672                                             nilfs_ioctl_do_get_suinfo);
673         case NILFS_IOCTL_GET_SUSTAT:
674                 return nilfs_ioctl_get_sustat(inode, filp, cmd, argp);
675         case NILFS_IOCTL_GET_VINFO:
676                 return nilfs_ioctl_get_info(inode, filp, cmd, argp,
677                                             sizeof(struct nilfs_vinfo),
678                                             nilfs_ioctl_do_get_vinfo);
679         case NILFS_IOCTL_GET_BDESCS:
680                 return nilfs_ioctl_get_bdescs(inode, filp, cmd, argp);
681         case NILFS_IOCTL_CLEAN_SEGMENTS:
682                 return nilfs_ioctl_clean_segments(inode, filp, cmd, argp);
683         case NILFS_IOCTL_SYNC:
684                 return nilfs_ioctl_sync(inode, filp, cmd, argp);
685         default:
686                 return -ENOTTY;
687         }
688 }