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23#include <linux/fs.h>
24#include <linux/wait.h>
25#include <linux/slab.h>
26#include <linux/capability.h>
27#include <linux/uaccess.h>
28#include <linux/vmalloc.h>
29#include <linux/compat.h>
30#include <linux/mount.h>
31#include <linux/buffer_head.h>
32#include <linux/nilfs2_fs.h>
33#include "nilfs.h"
34#include "segment.h"
35#include "bmap.h"
36#include "cpfile.h"
37#include "sufile.h"
38#include "dat.h"
39
40
41static int nilfs_ioctl_wrap_copy(struct the_nilfs *nilfs,
42 struct nilfs_argv *argv, int dir,
43 ssize_t (*dofunc)(struct the_nilfs *,
44 __u64 *, int,
45 void *, size_t, size_t))
46{
47 void *buf;
48 void __user *base = (void __user *)(unsigned long)argv->v_base;
49 size_t maxmembs, total, n;
50 ssize_t nr;
51 int ret, i;
52 __u64 pos, ppos;
53
54 if (argv->v_nmembs == 0)
55 return 0;
56
57 if (argv->v_size > PAGE_SIZE)
58 return -EINVAL;
59
60 buf = (void *)__get_free_pages(GFP_NOFS, 0);
61 if (unlikely(!buf))
62 return -ENOMEM;
63 maxmembs = PAGE_SIZE / argv->v_size;
64
65 ret = 0;
66 total = 0;
67 pos = argv->v_index;
68 for (i = 0; i < argv->v_nmembs; i += n) {
69 n = (argv->v_nmembs - i < maxmembs) ?
70 argv->v_nmembs - i : maxmembs;
71 if ((dir & _IOC_WRITE) &&
72 copy_from_user(buf, base + argv->v_size * i,
73 argv->v_size * n)) {
74 ret = -EFAULT;
75 break;
76 }
77 ppos = pos;
78 nr = dofunc(nilfs, &pos, argv->v_flags, buf, argv->v_size,
79 n);
80 if (nr < 0) {
81 ret = nr;
82 break;
83 }
84 if ((dir & _IOC_READ) &&
85 copy_to_user(base + argv->v_size * i, buf,
86 argv->v_size * nr)) {
87 ret = -EFAULT;
88 break;
89 }
90 total += nr;
91 if ((size_t)nr < n)
92 break;
93 if (pos == ppos)
94 pos += n;
95 }
96 argv->v_nmembs = total;
97
98 free_pages((unsigned long)buf, 0);
99 return ret;
100}
101
102static int nilfs_ioctl_getflags(struct inode *inode, void __user *argp)
103{
104 unsigned int flags = NILFS_I(inode)->i_flags & FS_FL_USER_VISIBLE;
105
106 return put_user(flags, (int __user *)argp);
107}
108
109static int nilfs_ioctl_setflags(struct inode *inode, struct file *filp,
110 void __user *argp)
111{
112 struct nilfs_transaction_info ti;
113 unsigned int flags, oldflags;
114 int ret;
115
116 if (!inode_owner_or_capable(inode))
117 return -EACCES;
118
119 if (get_user(flags, (int __user *)argp))
120 return -EFAULT;
121
122 ret = mnt_want_write_file(filp);
123 if (ret)
124 return ret;
125
126 flags = nilfs_mask_flags(inode->i_mode, flags);
127
128 mutex_lock(&inode->i_mutex);
129
130 oldflags = NILFS_I(inode)->i_flags;
131
132
133
134
135
136 ret = -EPERM;
137 if (((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) &&
138 !capable(CAP_LINUX_IMMUTABLE))
139 goto out;
140
141 ret = nilfs_transaction_begin(inode->i_sb, &ti, 0);
142 if (ret)
143 goto out;
144
145 NILFS_I(inode)->i_flags = (oldflags & ~FS_FL_USER_MODIFIABLE) |
146 (flags & FS_FL_USER_MODIFIABLE);
147
148 nilfs_set_inode_flags(inode);
149 inode->i_ctime = CURRENT_TIME;
150 if (IS_SYNC(inode))
151 nilfs_set_transaction_flag(NILFS_TI_SYNC);
152
153 nilfs_mark_inode_dirty(inode);
154 ret = nilfs_transaction_commit(inode->i_sb);
155out:
156 mutex_unlock(&inode->i_mutex);
157 mnt_drop_write_file(filp);
158 return ret;
159}
160
161static int nilfs_ioctl_getversion(struct inode *inode, void __user *argp)
162{
163 return put_user(inode->i_generation, (int __user *)argp);
164}
165
166static int nilfs_ioctl_change_cpmode(struct inode *inode, struct file *filp,
167 unsigned int cmd, void __user *argp)
168{
169 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
170 struct nilfs_transaction_info ti;
171 struct nilfs_cpmode cpmode;
172 int ret;
173
174 if (!capable(CAP_SYS_ADMIN))
175 return -EPERM;
176
177 ret = mnt_want_write_file(filp);
178 if (ret)
179 return ret;
180
181 ret = -EFAULT;
182 if (copy_from_user(&cpmode, argp, sizeof(cpmode)))
183 goto out;
184
185 mutex_lock(&nilfs->ns_snapshot_mount_mutex);
186
187 nilfs_transaction_begin(inode->i_sb, &ti, 0);
188 ret = nilfs_cpfile_change_cpmode(
189 nilfs->ns_cpfile, cpmode.cm_cno, cpmode.cm_mode);
190 if (unlikely(ret < 0))
191 nilfs_transaction_abort(inode->i_sb);
192 else
193 nilfs_transaction_commit(inode->i_sb);
194
195 mutex_unlock(&nilfs->ns_snapshot_mount_mutex);
196out:
197 mnt_drop_write_file(filp);
198 return ret;
199}
200
201static int
202nilfs_ioctl_delete_checkpoint(struct inode *inode, struct file *filp,
203 unsigned int cmd, void __user *argp)
204{
205 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
206 struct nilfs_transaction_info ti;
207 __u64 cno;
208 int ret;
209
210 if (!capable(CAP_SYS_ADMIN))
211 return -EPERM;
212
213 ret = mnt_want_write_file(filp);
214 if (ret)
215 return ret;
216
217 ret = -EFAULT;
218 if (copy_from_user(&cno, argp, sizeof(cno)))
219 goto out;
220
221 nilfs_transaction_begin(inode->i_sb, &ti, 0);
222 ret = nilfs_cpfile_delete_checkpoint(nilfs->ns_cpfile, cno);
223 if (unlikely(ret < 0))
224 nilfs_transaction_abort(inode->i_sb);
225 else
226 nilfs_transaction_commit(inode->i_sb);
227out:
228 mnt_drop_write_file(filp);
229 return ret;
230}
231
232static ssize_t
233nilfs_ioctl_do_get_cpinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
234 void *buf, size_t size, size_t nmembs)
235{
236 int ret;
237
238 down_read(&nilfs->ns_segctor_sem);
239 ret = nilfs_cpfile_get_cpinfo(nilfs->ns_cpfile, posp, flags, buf,
240 size, nmembs);
241 up_read(&nilfs->ns_segctor_sem);
242 return ret;
243}
244
245static int nilfs_ioctl_get_cpstat(struct inode *inode, struct file *filp,
246 unsigned int cmd, void __user *argp)
247{
248 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
249 struct nilfs_cpstat cpstat;
250 int ret;
251
252 down_read(&nilfs->ns_segctor_sem);
253 ret = nilfs_cpfile_get_stat(nilfs->ns_cpfile, &cpstat);
254 up_read(&nilfs->ns_segctor_sem);
255 if (ret < 0)
256 return ret;
257
258 if (copy_to_user(argp, &cpstat, sizeof(cpstat)))
259 ret = -EFAULT;
260 return ret;
261}
262
263static ssize_t
264nilfs_ioctl_do_get_suinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
265 void *buf, size_t size, size_t nmembs)
266{
267 int ret;
268
269 down_read(&nilfs->ns_segctor_sem);
270 ret = nilfs_sufile_get_suinfo(nilfs->ns_sufile, *posp, buf, size,
271 nmembs);
272 up_read(&nilfs->ns_segctor_sem);
273 return ret;
274}
275
276static int nilfs_ioctl_get_sustat(struct inode *inode, struct file *filp,
277 unsigned int cmd, void __user *argp)
278{
279 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
280 struct nilfs_sustat sustat;
281 int ret;
282
283 down_read(&nilfs->ns_segctor_sem);
284 ret = nilfs_sufile_get_stat(nilfs->ns_sufile, &sustat);
285 up_read(&nilfs->ns_segctor_sem);
286 if (ret < 0)
287 return ret;
288
289 if (copy_to_user(argp, &sustat, sizeof(sustat)))
290 ret = -EFAULT;
291 return ret;
292}
293
294static ssize_t
295nilfs_ioctl_do_get_vinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
296 void *buf, size_t size, size_t nmembs)
297{
298 int ret;
299
300 down_read(&nilfs->ns_segctor_sem);
301 ret = nilfs_dat_get_vinfo(nilfs->ns_dat, buf, size, nmembs);
302 up_read(&nilfs->ns_segctor_sem);
303 return ret;
304}
305
306static ssize_t
307nilfs_ioctl_do_get_bdescs(struct the_nilfs *nilfs, __u64 *posp, int flags,
308 void *buf, size_t size, size_t nmembs)
309{
310 struct nilfs_bmap *bmap = NILFS_I(nilfs->ns_dat)->i_bmap;
311 struct nilfs_bdesc *bdescs = buf;
312 int ret, i;
313
314 down_read(&nilfs->ns_segctor_sem);
315 for (i = 0; i < nmembs; i++) {
316 ret = nilfs_bmap_lookup_at_level(bmap,
317 bdescs[i].bd_offset,
318 bdescs[i].bd_level + 1,
319 &bdescs[i].bd_blocknr);
320 if (ret < 0) {
321 if (ret != -ENOENT) {
322 up_read(&nilfs->ns_segctor_sem);
323 return ret;
324 }
325 bdescs[i].bd_blocknr = 0;
326 }
327 }
328 up_read(&nilfs->ns_segctor_sem);
329 return nmembs;
330}
331
332static int nilfs_ioctl_get_bdescs(struct inode *inode, struct file *filp,
333 unsigned int cmd, void __user *argp)
334{
335 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
336 struct nilfs_argv argv;
337 int ret;
338
339 if (copy_from_user(&argv, argp, sizeof(argv)))
340 return -EFAULT;
341
342 if (argv.v_size != sizeof(struct nilfs_bdesc))
343 return -EINVAL;
344
345 ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd),
346 nilfs_ioctl_do_get_bdescs);
347 if (ret < 0)
348 return ret;
349
350 if (copy_to_user(argp, &argv, sizeof(argv)))
351 ret = -EFAULT;
352 return ret;
353}
354
355static int nilfs_ioctl_move_inode_block(struct inode *inode,
356 struct nilfs_vdesc *vdesc,
357 struct list_head *buffers)
358{
359 struct buffer_head *bh;
360 int ret;
361
362 if (vdesc->vd_flags == 0)
363 ret = nilfs_gccache_submit_read_data(
364 inode, vdesc->vd_offset, vdesc->vd_blocknr,
365 vdesc->vd_vblocknr, &bh);
366 else
367 ret = nilfs_gccache_submit_read_node(
368 inode, vdesc->vd_blocknr, vdesc->vd_vblocknr, &bh);
369
370 if (unlikely(ret < 0)) {
371 if (ret == -ENOENT)
372 printk(KERN_CRIT
373 "%s: invalid virtual block address (%s): "
374 "ino=%llu, cno=%llu, offset=%llu, "
375 "blocknr=%llu, vblocknr=%llu\n",
376 __func__, vdesc->vd_flags ? "node" : "data",
377 (unsigned long long)vdesc->vd_ino,
378 (unsigned long long)vdesc->vd_cno,
379 (unsigned long long)vdesc->vd_offset,
380 (unsigned long long)vdesc->vd_blocknr,
381 (unsigned long long)vdesc->vd_vblocknr);
382 return ret;
383 }
384 if (unlikely(!list_empty(&bh->b_assoc_buffers))) {
385 printk(KERN_CRIT "%s: conflicting %s buffer: ino=%llu, "
386 "cno=%llu, offset=%llu, blocknr=%llu, vblocknr=%llu\n",
387 __func__, vdesc->vd_flags ? "node" : "data",
388 (unsigned long long)vdesc->vd_ino,
389 (unsigned long long)vdesc->vd_cno,
390 (unsigned long long)vdesc->vd_offset,
391 (unsigned long long)vdesc->vd_blocknr,
392 (unsigned long long)vdesc->vd_vblocknr);
393 brelse(bh);
394 return -EEXIST;
395 }
396 list_add_tail(&bh->b_assoc_buffers, buffers);
397 return 0;
398}
399
400static int nilfs_ioctl_move_blocks(struct super_block *sb,
401 struct nilfs_argv *argv, void *buf)
402{
403 size_t nmembs = argv->v_nmembs;
404 struct the_nilfs *nilfs = sb->s_fs_info;
405 struct inode *inode;
406 struct nilfs_vdesc *vdesc;
407 struct buffer_head *bh, *n;
408 LIST_HEAD(buffers);
409 ino_t ino;
410 __u64 cno;
411 int i, ret;
412
413 for (i = 0, vdesc = buf; i < nmembs; ) {
414 ino = vdesc->vd_ino;
415 cno = vdesc->vd_cno;
416 inode = nilfs_iget_for_gc(sb, ino, cno);
417 if (IS_ERR(inode)) {
418 ret = PTR_ERR(inode);
419 goto failed;
420 }
421 if (list_empty(&NILFS_I(inode)->i_dirty)) {
422
423
424
425
426
427 igrab(inode);
428 list_add(&NILFS_I(inode)->i_dirty,
429 &nilfs->ns_gc_inodes);
430 }
431
432 do {
433 ret = nilfs_ioctl_move_inode_block(inode, vdesc,
434 &buffers);
435 if (unlikely(ret < 0)) {
436 iput(inode);
437 goto failed;
438 }
439 vdesc++;
440 } while (++i < nmembs &&
441 vdesc->vd_ino == ino && vdesc->vd_cno == cno);
442
443 iput(inode);
444 }
445
446 list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) {
447 ret = nilfs_gccache_wait_and_mark_dirty(bh);
448 if (unlikely(ret < 0)) {
449 WARN_ON(ret == -EEXIST);
450 goto failed;
451 }
452 list_del_init(&bh->b_assoc_buffers);
453 brelse(bh);
454 }
455 return nmembs;
456
457 failed:
458 list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) {
459 list_del_init(&bh->b_assoc_buffers);
460 brelse(bh);
461 }
462 return ret;
463}
464
465static int nilfs_ioctl_delete_checkpoints(struct the_nilfs *nilfs,
466 struct nilfs_argv *argv, void *buf)
467{
468 size_t nmembs = argv->v_nmembs;
469 struct inode *cpfile = nilfs->ns_cpfile;
470 struct nilfs_period *periods = buf;
471 int ret, i;
472
473 for (i = 0; i < nmembs; i++) {
474 ret = nilfs_cpfile_delete_checkpoints(
475 cpfile, periods[i].p_start, periods[i].p_end);
476 if (ret < 0)
477 return ret;
478 }
479 return nmembs;
480}
481
482static int nilfs_ioctl_free_vblocknrs(struct the_nilfs *nilfs,
483 struct nilfs_argv *argv, void *buf)
484{
485 size_t nmembs = argv->v_nmembs;
486 int ret;
487
488 ret = nilfs_dat_freev(nilfs->ns_dat, buf, nmembs);
489
490 return (ret < 0) ? ret : nmembs;
491}
492
493static int nilfs_ioctl_mark_blocks_dirty(struct the_nilfs *nilfs,
494 struct nilfs_argv *argv, void *buf)
495{
496 size_t nmembs = argv->v_nmembs;
497 struct nilfs_bmap *bmap = NILFS_I(nilfs->ns_dat)->i_bmap;
498 struct nilfs_bdesc *bdescs = buf;
499 int ret, i;
500
501 for (i = 0; i < nmembs; i++) {
502
503 ret = nilfs_bmap_lookup_at_level(bmap,
504 bdescs[i].bd_offset,
505 bdescs[i].bd_level + 1,
506 &bdescs[i].bd_blocknr);
507 if (ret < 0) {
508 if (ret != -ENOENT)
509 return ret;
510 bdescs[i].bd_blocknr = 0;
511 }
512 if (bdescs[i].bd_blocknr != bdescs[i].bd_oblocknr)
513
514 continue;
515 if (bdescs[i].bd_level == 0) {
516 ret = nilfs_mdt_mark_block_dirty(nilfs->ns_dat,
517 bdescs[i].bd_offset);
518 if (ret < 0) {
519 WARN_ON(ret == -ENOENT);
520 return ret;
521 }
522 } else {
523 ret = nilfs_bmap_mark(bmap, bdescs[i].bd_offset,
524 bdescs[i].bd_level);
525 if (ret < 0) {
526 WARN_ON(ret == -ENOENT);
527 return ret;
528 }
529 }
530 }
531 return nmembs;
532}
533
534int nilfs_ioctl_prepare_clean_segments(struct the_nilfs *nilfs,
535 struct nilfs_argv *argv, void **kbufs)
536{
537 const char *msg;
538 int ret;
539
540 ret = nilfs_ioctl_delete_checkpoints(nilfs, &argv[1], kbufs[1]);
541 if (ret < 0) {
542
543
544
545
546 msg = "cannot delete checkpoints";
547 goto failed;
548 }
549 ret = nilfs_ioctl_free_vblocknrs(nilfs, &argv[2], kbufs[2]);
550 if (ret < 0) {
551
552
553
554
555 msg = "cannot delete virtual blocks from DAT file";
556 goto failed;
557 }
558 ret = nilfs_ioctl_mark_blocks_dirty(nilfs, &argv[3], kbufs[3]);
559 if (ret < 0) {
560
561
562
563 msg = "cannot mark copying blocks dirty";
564 goto failed;
565 }
566 return 0;
567
568 failed:
569 printk(KERN_ERR "NILFS: GC failed during preparation: %s: err=%d\n",
570 msg, ret);
571 return ret;
572}
573
574static int nilfs_ioctl_clean_segments(struct inode *inode, struct file *filp,
575 unsigned int cmd, void __user *argp)
576{
577 struct nilfs_argv argv[5];
578 static const size_t argsz[5] = {
579 sizeof(struct nilfs_vdesc),
580 sizeof(struct nilfs_period),
581 sizeof(__u64),
582 sizeof(struct nilfs_bdesc),
583 sizeof(__u64),
584 };
585 void __user *base;
586 void *kbufs[5];
587 struct the_nilfs *nilfs;
588 size_t len, nsegs;
589 int n, ret;
590
591 if (!capable(CAP_SYS_ADMIN))
592 return -EPERM;
593
594 ret = mnt_want_write_file(filp);
595 if (ret)
596 return ret;
597
598 ret = -EFAULT;
599 if (copy_from_user(argv, argp, sizeof(argv)))
600 goto out;
601
602 ret = -EINVAL;
603 nsegs = argv[4].v_nmembs;
604 if (argv[4].v_size != argsz[4])
605 goto out;
606 if (nsegs > UINT_MAX / sizeof(__u64))
607 goto out;
608
609
610
611
612
613
614 kbufs[4] = memdup_user((void __user *)(unsigned long)argv[4].v_base,
615 nsegs * sizeof(__u64));
616 if (IS_ERR(kbufs[4])) {
617 ret = PTR_ERR(kbufs[4]);
618 goto out;
619 }
620 nilfs = inode->i_sb->s_fs_info;
621
622 for (n = 0; n < 4; n++) {
623 ret = -EINVAL;
624 if (argv[n].v_size != argsz[n])
625 goto out_free;
626
627 if (argv[n].v_nmembs > nsegs * nilfs->ns_blocks_per_segment)
628 goto out_free;
629
630 if (argv[n].v_nmembs >= UINT_MAX / argv[n].v_size)
631 goto out_free;
632
633 len = argv[n].v_size * argv[n].v_nmembs;
634 base = (void __user *)(unsigned long)argv[n].v_base;
635 if (len == 0) {
636 kbufs[n] = NULL;
637 continue;
638 }
639
640 kbufs[n] = vmalloc(len);
641 if (!kbufs[n]) {
642 ret = -ENOMEM;
643 goto out_free;
644 }
645 if (copy_from_user(kbufs[n], base, len)) {
646 ret = -EFAULT;
647 vfree(kbufs[n]);
648 goto out_free;
649 }
650 }
651
652
653
654
655
656
657
658 if (test_and_set_bit(THE_NILFS_GC_RUNNING, &nilfs->ns_flags)) {
659 ret = -EBUSY;
660 goto out_free;
661 }
662
663 ret = nilfs_ioctl_move_blocks(inode->i_sb, &argv[0], kbufs[0]);
664 if (ret < 0)
665 printk(KERN_ERR "NILFS: GC failed during preparation: "
666 "cannot read source blocks: err=%d\n", ret);
667 else {
668 if (nilfs_sb_need_update(nilfs))
669 set_nilfs_discontinued(nilfs);
670 ret = nilfs_clean_segments(inode->i_sb, argv, kbufs);
671 }
672
673 nilfs_remove_all_gcinodes(nilfs);
674 clear_nilfs_gc_running(nilfs);
675
676out_free:
677 while (--n >= 0)
678 vfree(kbufs[n]);
679 kfree(kbufs[4]);
680out:
681 mnt_drop_write_file(filp);
682 return ret;
683}
684
685static int nilfs_ioctl_sync(struct inode *inode, struct file *filp,
686 unsigned int cmd, void __user *argp)
687{
688 __u64 cno;
689 int ret;
690 struct the_nilfs *nilfs;
691
692 ret = nilfs_construct_segment(inode->i_sb);
693 if (ret < 0)
694 return ret;
695
696 nilfs = inode->i_sb->s_fs_info;
697 if (nilfs_test_opt(nilfs, BARRIER)) {
698 ret = blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
699 if (ret == -EIO)
700 return ret;
701 }
702
703 if (argp != NULL) {
704 down_read(&nilfs->ns_segctor_sem);
705 cno = nilfs->ns_cno - 1;
706 up_read(&nilfs->ns_segctor_sem);
707 if (copy_to_user(argp, &cno, sizeof(cno)))
708 return -EFAULT;
709 }
710 return 0;
711}
712
713static int nilfs_ioctl_resize(struct inode *inode, struct file *filp,
714 void __user *argp)
715{
716 __u64 newsize;
717 int ret = -EPERM;
718
719 if (!capable(CAP_SYS_ADMIN))
720 goto out;
721
722 ret = mnt_want_write_file(filp);
723 if (ret)
724 goto out;
725
726 ret = -EFAULT;
727 if (copy_from_user(&newsize, argp, sizeof(newsize)))
728 goto out_drop_write;
729
730 ret = nilfs_resize_fs(inode->i_sb, newsize);
731
732out_drop_write:
733 mnt_drop_write_file(filp);
734out:
735 return ret;
736}
737
738static int nilfs_ioctl_set_alloc_range(struct inode *inode, void __user *argp)
739{
740 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
741 __u64 range[2];
742 __u64 minseg, maxseg;
743 unsigned long segbytes;
744 int ret = -EPERM;
745
746 if (!capable(CAP_SYS_ADMIN))
747 goto out;
748
749 ret = -EFAULT;
750 if (copy_from_user(range, argp, sizeof(__u64[2])))
751 goto out;
752
753 ret = -ERANGE;
754 if (range[1] > i_size_read(inode->i_sb->s_bdev->bd_inode))
755 goto out;
756
757 segbytes = nilfs->ns_blocks_per_segment * nilfs->ns_blocksize;
758
759 minseg = range[0] + segbytes - 1;
760 do_div(minseg, segbytes);
761 maxseg = NILFS_SB2_OFFSET_BYTES(range[1]);
762 do_div(maxseg, segbytes);
763 maxseg--;
764
765 ret = nilfs_sufile_set_alloc_range(nilfs->ns_sufile, minseg, maxseg);
766out:
767 return ret;
768}
769
770static int nilfs_ioctl_get_info(struct inode *inode, struct file *filp,
771 unsigned int cmd, void __user *argp,
772 size_t membsz,
773 ssize_t (*dofunc)(struct the_nilfs *,
774 __u64 *, int,
775 void *, size_t, size_t))
776
777{
778 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
779 struct nilfs_argv argv;
780 int ret;
781
782 if (copy_from_user(&argv, argp, sizeof(argv)))
783 return -EFAULT;
784
785 if (argv.v_size < membsz)
786 return -EINVAL;
787
788 ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), dofunc);
789 if (ret < 0)
790 return ret;
791
792 if (copy_to_user(argp, &argv, sizeof(argv)))
793 ret = -EFAULT;
794 return ret;
795}
796
797long nilfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
798{
799 struct inode *inode = file_inode(filp);
800 void __user *argp = (void __user *)arg;
801
802 switch (cmd) {
803 case FS_IOC_GETFLAGS:
804 return nilfs_ioctl_getflags(inode, argp);
805 case FS_IOC_SETFLAGS:
806 return nilfs_ioctl_setflags(inode, filp, argp);
807 case FS_IOC_GETVERSION:
808 return nilfs_ioctl_getversion(inode, argp);
809 case NILFS_IOCTL_CHANGE_CPMODE:
810 return nilfs_ioctl_change_cpmode(inode, filp, cmd, argp);
811 case NILFS_IOCTL_DELETE_CHECKPOINT:
812 return nilfs_ioctl_delete_checkpoint(inode, filp, cmd, argp);
813 case NILFS_IOCTL_GET_CPINFO:
814 return nilfs_ioctl_get_info(inode, filp, cmd, argp,
815 sizeof(struct nilfs_cpinfo),
816 nilfs_ioctl_do_get_cpinfo);
817 case NILFS_IOCTL_GET_CPSTAT:
818 return nilfs_ioctl_get_cpstat(inode, filp, cmd, argp);
819 case NILFS_IOCTL_GET_SUINFO:
820 return nilfs_ioctl_get_info(inode, filp, cmd, argp,
821 sizeof(struct nilfs_suinfo),
822 nilfs_ioctl_do_get_suinfo);
823 case NILFS_IOCTL_GET_SUSTAT:
824 return nilfs_ioctl_get_sustat(inode, filp, cmd, argp);
825 case NILFS_IOCTL_GET_VINFO:
826 return nilfs_ioctl_get_info(inode, filp, cmd, argp,
827 sizeof(struct nilfs_vinfo),
828 nilfs_ioctl_do_get_vinfo);
829 case NILFS_IOCTL_GET_BDESCS:
830 return nilfs_ioctl_get_bdescs(inode, filp, cmd, argp);
831 case NILFS_IOCTL_CLEAN_SEGMENTS:
832 return nilfs_ioctl_clean_segments(inode, filp, cmd, argp);
833 case NILFS_IOCTL_SYNC:
834 return nilfs_ioctl_sync(inode, filp, cmd, argp);
835 case NILFS_IOCTL_RESIZE:
836 return nilfs_ioctl_resize(inode, filp, argp);
837 case NILFS_IOCTL_SET_ALLOC_RANGE:
838 return nilfs_ioctl_set_alloc_range(inode, argp);
839 default:
840 return -ENOTTY;
841 }
842}
843
844#ifdef CONFIG_COMPAT
845long nilfs_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
846{
847 switch (cmd) {
848 case FS_IOC32_GETFLAGS:
849 cmd = FS_IOC_GETFLAGS;
850 break;
851 case FS_IOC32_SETFLAGS:
852 cmd = FS_IOC_SETFLAGS;
853 break;
854 case FS_IOC32_GETVERSION:
855 cmd = FS_IOC_GETVERSION;
856 break;
857 case NILFS_IOCTL_CHANGE_CPMODE:
858 case NILFS_IOCTL_DELETE_CHECKPOINT:
859 case NILFS_IOCTL_GET_CPINFO:
860 case NILFS_IOCTL_GET_CPSTAT:
861 case NILFS_IOCTL_GET_SUINFO:
862 case NILFS_IOCTL_GET_SUSTAT:
863 case NILFS_IOCTL_GET_VINFO:
864 case NILFS_IOCTL_GET_BDESCS:
865 case NILFS_IOCTL_CLEAN_SEGMENTS:
866 case NILFS_IOCTL_SYNC:
867 case NILFS_IOCTL_RESIZE:
868 case NILFS_IOCTL_SET_ALLOC_RANGE:
869 break;
870 default:
871 return -ENOIOCTLCMD;
872 }
873 return nilfs_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
874}
875#endif
876
