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