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nilfs2: cleanup nilfs_clear_inode
[mirror_ubuntu-jammy-kernel.git] / fs / nilfs2 / ioctl.c
CommitLineData
7942b919
KS		 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/nilfs2_fs.h>
29#include "nilfs.h"
30#include "segment.h"
31#include "bmap.h"
32#include "cpfile.h"
33#include "sufile.h"
34#include "dat.h"
35
36
7942b919
KS		 37static int nilfs_ioctl_wrap_copy(struct the_nilfs *nilfs,
38 struct nilfs_argv *argv, int dir,
39 ssize_t (*dofunc)(struct the_nilfs *,
40 int, int,
41 void *, size_t, size_t))
42{
43 void *buf;
3358b4aa 44 size_t maxmembs, total, n;
7942b919
KS		 45 ssize_t nr;
46 int ret, i;
47
48 if (argv->v_nmembs == 0)
49 return 0;
50
3358b4aa
RK		 51 if (argv->v_size > PAGE_SIZE)
52 return -EINVAL;
53
54 buf = (void *)__get_free_pages(GFP_NOFS, 0);
55 if (unlikely(!buf))
7942b919 56 return -ENOMEM;
3358b4aa 57 maxmembs = PAGE_SIZE / argv->v_size;
7942b919
KS		 58
59 ret = 0;
60 total = 0;
61 for (i = 0; i < argv->v_nmembs; i += n) {
62 n = (argv->v_nmembs - i < maxmembs) ?
63 argv->v_nmembs - i : maxmembs;
64 if ((dir & _IOC_WRITE) &&
65 copy_from_user(buf,
66 (void __user *)argv->v_base + argv->v_size * i,
67 argv->v_size * n)) {
68 ret = -EFAULT;
69 break;
70 }
71 nr = (*dofunc)(nilfs, argv->v_index + i, argv->v_flags, buf,
72 argv->v_size, n);
73 if (nr < 0) {
74 ret = nr;
75 break;
76 }
77 if ((dir & _IOC_READ) &&
78 copy_to_user(
79 (void __user *)argv->v_base + argv->v_size * i,
80 buf, argv->v_size * nr)) {
81 ret = -EFAULT;
82 break;
83 }
84 total += nr;
85 }
86 argv->v_nmembs = total;
87
3358b4aa 88 free_pages((unsigned long)buf, 0);
7942b919
KS		 89 return ret;
90}
91
92static int nilfs_ioctl_change_cpmode(struct inode *inode, struct file *filp,
93 unsigned int cmd, void __user *argp)
94{
95 struct inode *cpfile = NILFS_SB(inode->i_sb)->s_nilfs->ns_cpfile;
96 struct nilfs_transaction_info ti;
97 struct nilfs_cpmode cpmode;
98 int ret;
99
100 if (!capable(CAP_SYS_ADMIN))
101 return -EPERM;
102 if (copy_from_user(&cpmode, argp, sizeof(cpmode)))
103 return -EFAULT;
104
105 nilfs_transaction_begin(inode->i_sb, &ti, 0);
106 ret = nilfs_cpfile_change_cpmode(
107 cpfile, cpmode.cm_cno, cpmode.cm_mode);
108 nilfs_transaction_end(inode->i_sb, !ret);
109 return ret;
110}
111
112static int
113nilfs_ioctl_delete_checkpoint(struct inode *inode, struct file *filp,
114 unsigned int cmd, void __user *argp)
115{
116 struct inode *cpfile = NILFS_SB(inode->i_sb)->s_nilfs->ns_cpfile;
117 struct nilfs_transaction_info ti;
118 __u64 cno;
119 int ret;
120
121 if (!capable(CAP_SYS_ADMIN))
122 return -EPERM;
123 if (copy_from_user(&cno, argp, sizeof(cno)))
124 return -EFAULT;
125
126 nilfs_transaction_begin(inode->i_sb, &ti, 0);
127 ret = nilfs_cpfile_delete_checkpoint(cpfile, cno);
128 nilfs_transaction_end(inode->i_sb, !ret);
129 return ret;
130}
131
132static ssize_t
133nilfs_ioctl_do_get_cpinfo(struct the_nilfs *nilfs, int index, int flags,
134 void *buf, size_t size, size_t nmembs)
135{
136 return nilfs_cpfile_get_cpinfo(nilfs->ns_cpfile, index, flags, buf,
137 nmembs);
138}
139
140static int nilfs_ioctl_get_cpinfo(struct inode *inode, struct file *filp,
141 unsigned int cmd, void __user *argp)
142{
143 struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
144 struct nilfs_argv argv;
145 struct nilfs_transaction_info ti;
146 int ret;
147
148 if (copy_from_user(&argv, argp, sizeof(argv)))
149 return -EFAULT;
150
151 nilfs_transaction_begin(inode->i_sb, &ti, 0);
152 ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd),
153 nilfs_ioctl_do_get_cpinfo);
154 nilfs_transaction_end(inode->i_sb, 0);
155
156 if (copy_to_user(argp, &argv, sizeof(argv)))
157 ret = -EFAULT;
158 return ret;
159}
160
161static int nilfs_ioctl_get_cpstat(struct inode *inode, struct file *filp,
162 unsigned int cmd, void __user *argp)
163{
164 struct inode *cpfile = NILFS_SB(inode->i_sb)->s_nilfs->ns_cpfile;
165 struct nilfs_cpstat cpstat;
166 struct nilfs_transaction_info ti;
167 int ret;
168
169 nilfs_transaction_begin(inode->i_sb, &ti, 0);
170 ret = nilfs_cpfile_get_stat(cpfile, &cpstat);
171 nilfs_transaction_end(inode->i_sb, 0);
172 if (ret < 0)
173 return ret;
174
175 if (copy_to_user(argp, &cpstat, sizeof(cpstat)))
176 ret = -EFAULT;
177 return ret;
178}
179
180static ssize_t
181nilfs_ioctl_do_get_suinfo(struct the_nilfs *nilfs, int index, int flags,
182 void *buf, size_t size, size_t nmembs)
183{
184 return nilfs_sufile_get_suinfo(nilfs->ns_sufile, index, buf, nmembs);
185}
186
187static int nilfs_ioctl_get_suinfo(struct inode *inode, struct file *filp,
188 unsigned int cmd, void __user *argp)
189{
190 struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
191 struct nilfs_argv argv;
192 struct nilfs_transaction_info ti;
193 int ret;
194
195 if (copy_from_user(&argv, argp, sizeof(argv)))
196 return -EFAULT;
197
198 nilfs_transaction_begin(inode->i_sb, &ti, 0);
199 ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd),
200 nilfs_ioctl_do_get_suinfo);
201 nilfs_transaction_end(inode->i_sb, 0);
202
203 if (copy_to_user(argp, &argv, sizeof(argv)))
204 ret = -EFAULT;
205 return ret;
206}
207
208static int nilfs_ioctl_get_sustat(struct inode *inode, struct file *filp,
209 unsigned int cmd, void __user *argp)
210{
211 struct inode *sufile = NILFS_SB(inode->i_sb)->s_nilfs->ns_sufile;
212 struct nilfs_sustat sustat;
213 struct nilfs_transaction_info ti;
214 int ret;
215
216 nilfs_transaction_begin(inode->i_sb, &ti, 0);
217 ret = nilfs_sufile_get_stat(sufile, &sustat);
218 nilfs_transaction_end(inode->i_sb, 0);
219 if (ret < 0)
220 return ret;
221
222 if (copy_to_user(argp, &sustat, sizeof(sustat)))
223 ret = -EFAULT;
224 return ret;
225}
226
227static ssize_t
228nilfs_ioctl_do_get_vinfo(struct the_nilfs *nilfs, int index, int flags,
229 void *buf, size_t size, size_t nmembs)
230{
231 return nilfs_dat_get_vinfo(nilfs_dat_inode(nilfs), buf, nmembs);
232}
233
234static int nilfs_ioctl_get_vinfo(struct inode *inode, struct file *filp,
235 unsigned int cmd, void __user *argp)
236{
237 struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
238 struct nilfs_argv argv;
239 struct nilfs_transaction_info ti;
240 int ret;
241
242 if (copy_from_user(&argv, argp, sizeof(argv)))
243 return -EFAULT;
244
245 nilfs_transaction_begin(inode->i_sb, &ti, 0);
246 ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd),
247 nilfs_ioctl_do_get_vinfo);
248 nilfs_transaction_end(inode->i_sb, 0);
249
250 if (copy_to_user(argp, &argv, sizeof(argv)))
251 ret = -EFAULT;
252 return ret;
253}
254
255static ssize_t
256nilfs_ioctl_do_get_bdescs(struct the_nilfs *nilfs, int index, int flags,
257 void *buf, size_t size, size_t nmembs)
258{
259 struct inode *dat = nilfs_dat_inode(nilfs);
260 struct nilfs_bmap *bmap = NILFS_I(dat)->i_bmap;
261 struct nilfs_bdesc *bdescs = buf;
262 int ret, i;
263
264 for (i = 0; i < nmembs; i++) {
265 ret = nilfs_bmap_lookup_at_level(bmap,
266 bdescs[i].bd_offset,
267 bdescs[i].bd_level + 1,
268 &bdescs[i].bd_blocknr);
269 if (ret < 0) {
270 if (ret != -ENOENT)
271 return ret;
272 bdescs[i].bd_blocknr = 0;
273 }
274 }
275 return nmembs;
276}
277
278static int nilfs_ioctl_get_bdescs(struct inode *inode, struct file *filp,
279 unsigned int cmd, void __user *argp)
280{
281 struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
282 struct nilfs_argv argv;
283 struct nilfs_transaction_info ti;
284 int ret;
285
286 if (copy_from_user(&argv, argp, sizeof(argv)))
287 return -EFAULT;
288
289 nilfs_transaction_begin(inode->i_sb, &ti, 0);
290 ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd),
291 nilfs_ioctl_do_get_bdescs);
292 nilfs_transaction_end(inode->i_sb, 0);
293
294 if (copy_to_user(argp, &argv, sizeof(argv)))
295 ret = -EFAULT;
296 return ret;
297}
298
299static int nilfs_ioctl_move_inode_block(struct inode *inode,
300 struct nilfs_vdesc *vdesc,
301 struct list_head *buffers)
302{
303 struct buffer_head *bh;
304 int ret;
305
306 if (vdesc->vd_flags == 0)
307 ret = nilfs_gccache_submit_read_data(
308 inode, vdesc->vd_offset, vdesc->vd_blocknr,
309 vdesc->vd_vblocknr, &bh);
310 else
311 ret = nilfs_gccache_submit_read_node(
312 inode, vdesc->vd_blocknr, vdesc->vd_vblocknr, &bh);
313
314 if (unlikely(ret < 0)) {
315 if (ret == -ENOENT)
316 printk(KERN_CRIT
317 "%s: invalid virtual block address (%s): "
318 "ino=%llu, cno=%llu, offset=%llu, "
319 "blocknr=%llu, vblocknr=%llu\n",
320 __func__, vdesc->vd_flags ? "node" : "data",
321 (unsigned long long)vdesc->vd_ino,
322 (unsigned long long)vdesc->vd_cno,
323 (unsigned long long)vdesc->vd_offset,
324 (unsigned long long)vdesc->vd_blocknr,
325 (unsigned long long)vdesc->vd_vblocknr);
326 return ret;
327 }
328 bh->b_private = vdesc;
329 list_add_tail(&bh->b_assoc_buffers, buffers);
330 return 0;
331}
332
333static ssize_t
334nilfs_ioctl_do_move_blocks(struct the_nilfs *nilfs, int index, int flags,
335 void *buf, size_t size, size_t nmembs)
336{
337 struct inode *inode;
338 struct nilfs_vdesc *vdesc;
339 struct buffer_head *bh, *n;
340 LIST_HEAD(buffers);
341 ino_t ino;
342 __u64 cno;
343 int i, ret;
344
345 for (i = 0, vdesc = buf; i < nmembs; ) {
346 ino = vdesc->vd_ino;
347 cno = vdesc->vd_cno;
348 inode = nilfs_gc_iget(nilfs, ino, cno);
349 if (unlikely(inode == NULL)) {
350 ret = -ENOMEM;
351 goto failed;
352 }
353 do {
354 ret = nilfs_ioctl_move_inode_block(inode, vdesc,
355 &buffers);
356 if (unlikely(ret < 0))
357 goto failed;
358 vdesc++;
359 } while (++i < nmembs &&
360 vdesc->vd_ino == ino && vdesc->vd_cno == cno);
361 }
362
363 list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) {
364 ret = nilfs_gccache_wait_and_mark_dirty(bh);
365 if (unlikely(ret < 0)) {
366 if (ret == -EEXIST) {
367 vdesc = bh->b_private;
368 printk(KERN_CRIT
369 "%s: conflicting %s buffer: "
370 "ino=%llu, cno=%llu, offset=%llu, "
371 "blocknr=%llu, vblocknr=%llu\n",
372 __func__,
373 vdesc->vd_flags ? "node" : "data",
374 (unsigned long long)vdesc->vd_ino,
375 (unsigned long long)vdesc->vd_cno,
376 (unsigned long long)vdesc->vd_offset,
377 (unsigned long long)vdesc->vd_blocknr,
378 (unsigned long long)vdesc->vd_vblocknr);
379 }
380 goto failed;
381 }
382 list_del_init(&bh->b_assoc_buffers);
383 bh->b_private = NULL;
384 brelse(bh);
385 }
386 return nmembs;
387
388 failed:
389 list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) {
390 list_del_init(&bh->b_assoc_buffers);
391 bh->b_private = NULL;
392 brelse(bh);
393 }
394 return ret;
395}
396
397static inline int nilfs_ioctl_move_blocks(struct the_nilfs *nilfs,
398 struct nilfs_argv *argv,
399 int dir)
400{
401 return nilfs_ioctl_wrap_copy(nilfs, argv, dir,
402 nilfs_ioctl_do_move_blocks);
403}
404
405static ssize_t
406nilfs_ioctl_do_delete_checkpoints(struct the_nilfs *nilfs, int index,
407 int flags, void *buf, size_t size,
408 size_t nmembs)
409{
410 struct inode *cpfile = nilfs->ns_cpfile;
411 struct nilfs_period *periods = buf;
412 int ret, i;
413
414 for (i = 0; i < nmembs; i++) {
415 ret = nilfs_cpfile_delete_checkpoints(
416 cpfile, periods[i].p_start, periods[i].p_end);
417 if (ret < 0)
418 return ret;
419 }
420 return nmembs;
421}
422
423static inline int nilfs_ioctl_delete_checkpoints(struct the_nilfs *nilfs,
424 struct nilfs_argv *argv,
425 int dir)
426{
427 return nilfs_ioctl_wrap_copy(nilfs, argv, dir,
428 nilfs_ioctl_do_delete_checkpoints);
429}
430
431static ssize_t
432nilfs_ioctl_do_free_vblocknrs(struct the_nilfs *nilfs, int index, int flags,
433 void *buf, size_t size, size_t nmembs)
434{
435 int ret = nilfs_dat_freev(nilfs_dat_inode(nilfs), buf, nmembs);
436
437 return (ret < 0) ? ret : nmembs;
438}
439
440static inline int nilfs_ioctl_free_vblocknrs(struct the_nilfs *nilfs,
441 struct nilfs_argv *argv,
442 int dir)
443{
444 return nilfs_ioctl_wrap_copy(nilfs, argv, dir,
445 nilfs_ioctl_do_free_vblocknrs);
446}
447
448static ssize_t
449nilfs_ioctl_do_mark_blocks_dirty(struct the_nilfs *nilfs, int index, int flags,
450 void *buf, size_t size, size_t nmembs)
451{
452 struct inode *dat = nilfs_dat_inode(nilfs);
453 struct nilfs_bmap *bmap = NILFS_I(dat)->i_bmap;
454 struct nilfs_bdesc *bdescs = buf;
455 int ret, i;
456
457 for (i = 0; i < nmembs; i++) {
458 /* XXX: use macro or inline func to check liveness */
459 ret = nilfs_bmap_lookup_at_level(bmap,
460 bdescs[i].bd_offset,
461 bdescs[i].bd_level + 1,
462 &bdescs[i].bd_blocknr);
463 if (ret < 0) {
464 if (ret != -ENOENT)
465 return ret;
466 bdescs[i].bd_blocknr = 0;
467 }
468 if (bdescs[i].bd_blocknr != bdescs[i].bd_oblocknr)
469 /* skip dead block */
470 continue;
471 if (bdescs[i].bd_level == 0) {
472 ret = nilfs_mdt_mark_block_dirty(dat,
473 bdescs[i].bd_offset);
474 if (ret < 0) {
475 BUG_ON(ret == -ENOENT);
476 return ret;
477 }
478 } else {
479 ret = nilfs_bmap_mark(bmap, bdescs[i].bd_offset,
480 bdescs[i].bd_level);
481 if (ret < 0) {
482 BUG_ON(ret == -ENOENT);
483 return ret;
484 }
485 }
486 }
487 return nmembs;
488}
489
490static inline int nilfs_ioctl_mark_blocks_dirty(struct the_nilfs *nilfs,
491 struct nilfs_argv *argv,
492 int dir)
493{
494 return nilfs_ioctl_wrap_copy(nilfs, argv, dir,
495 nilfs_ioctl_do_mark_blocks_dirty);
496}
497
498static ssize_t
499nilfs_ioctl_do_free_segments(struct the_nilfs *nilfs, int index, int flags,
500 void *buf, size_t size, size_t nmembs)
501{
502 struct nilfs_sb_info *sbi = nilfs_get_writer(nilfs);
503 int ret;
504
505 BUG_ON(!sbi);
506 ret = nilfs_segctor_add_segments_to_be_freed(
507 NILFS_SC(sbi), buf, nmembs);
508 nilfs_put_writer(nilfs);
509
510 return (ret < 0) ? ret : nmembs;
511}
512
513static inline int nilfs_ioctl_free_segments(struct the_nilfs *nilfs,
514 struct nilfs_argv *argv,
515 int dir)
516{
517 return nilfs_ioctl_wrap_copy(nilfs, argv, dir,
518 nilfs_ioctl_do_free_segments);
519}
520
521int nilfs_ioctl_prepare_clean_segments(struct the_nilfs *nilfs,
522 void __user *argp)
523{
524 struct nilfs_argv argv[5];
525 int dir, ret;
526
527 if (copy_from_user(argv, argp, sizeof(argv)))
528 return -EFAULT;
529
530 dir = _IOC_WRITE;
531 ret = nilfs_ioctl_move_blocks(nilfs, &argv[0], dir);
532 if (ret < 0)
533 goto out_move_blks;
534 ret = nilfs_ioctl_delete_checkpoints(nilfs, &argv[1], dir);
535 if (ret < 0)
536 goto out_del_cps;
537 ret = nilfs_ioctl_free_vblocknrs(nilfs, &argv[2], dir);
538 if (ret < 0)
539 goto out_free_vbns;
540 ret = nilfs_ioctl_mark_blocks_dirty(nilfs, &argv[3], dir);
541 if (ret < 0)
542 goto out_free_vbns;
543 ret = nilfs_ioctl_free_segments(nilfs, &argv[4], dir);
544 if (ret < 0)
545 goto out_free_segs;
546
547 return 0;
548
549 out_free_segs:
550 BUG(); /* XXX: not implemented yet */
551 out_free_vbns:
552 BUG();/* XXX: not implemented yet */
553 out_del_cps:
554 BUG();/* XXX: not implemented yet */
555 out_move_blks:
556 nilfs_remove_all_gcinode(nilfs);
557 return ret;
558}
559
560static int nilfs_ioctl_clean_segments(struct inode *inode, struct file *filp,
561 unsigned int cmd, void __user *argp)
562{
563 int ret;
564
565 if (!capable(CAP_SYS_ADMIN))
566 return -EPERM;
567
568 ret = nilfs_clean_segments(inode->i_sb, argp);
569 clear_nilfs_cond_nongc_write(NILFS_SB(inode->i_sb)->s_nilfs);
570 return ret;
571}
572
573static int nilfs_ioctl_test_cond(struct the_nilfs *nilfs, int cond)
574{
575 return (cond & NILFS_TIMEDWAIT_SEG_WRITE) &&
576 nilfs_cond_nongc_write(nilfs);
577}
578
579static void nilfs_ioctl_clear_cond(struct the_nilfs *nilfs, int cond)
580{
581 if (cond & NILFS_TIMEDWAIT_SEG_WRITE)
582 clear_nilfs_cond_nongc_write(nilfs);
583}
584
585static int nilfs_ioctl_timedwait(struct inode *inode, struct file *filp,
586 unsigned int cmd, void __user *argp)
587{
588 struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
589 struct nilfs_wait_cond wc;
590 long ret;
591
592 if (!capable(CAP_SYS_ADMIN))
593 return -EPERM;
594 if (copy_from_user(&wc, argp, sizeof(wc)))
595 return -EFAULT;
596
597 unlock_kernel();
598 ret = wc.wc_flags ?
599 wait_event_interruptible_timeout(
600 nilfs->ns_cleanerd_wq,
601 nilfs_ioctl_test_cond(nilfs, wc.wc_cond),
602 timespec_to_jiffies(&wc.wc_timeout)) :
603 wait_event_interruptible(
604 nilfs->ns_cleanerd_wq,
605 nilfs_ioctl_test_cond(nilfs, wc.wc_cond));
606 lock_kernel();
607 nilfs_ioctl_clear_cond(nilfs, wc.wc_cond);
608
609 if (ret > 0) {
610 jiffies_to_timespec(ret, &wc.wc_timeout);
611 if (copy_to_user(argp, &wc, sizeof(wc)))
612 return -EFAULT;
613 return 0;
614 }
615 if (ret != 0)
616 return -EINTR;
617
618 return wc.wc_flags ? -ETIME : 0;
619}
620
621static int nilfs_ioctl_sync(struct inode *inode, struct file *filp,
622 unsigned int cmd, void __user *argp)
623{
624 __u64 cno;
625 int ret;
626
627 ret = nilfs_construct_segment(inode->i_sb);
628 if (ret < 0)
629 return ret;
630
631 if (argp != NULL) {
632 cno = NILFS_SB(inode->i_sb)->s_nilfs->ns_cno - 1;
633 if (copy_to_user(argp, &cno, sizeof(cno)))
634 return -EFAULT;
635 }
636 return 0;
637}
638
639int nilfs_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
640 unsigned long arg)
641{
642 void __user *argp = (void * __user *)arg;
643
644 switch (cmd) {
645 case NILFS_IOCTL_CHANGE_CPMODE:
646 return nilfs_ioctl_change_cpmode(inode, filp, cmd, argp);
647 case NILFS_IOCTL_DELETE_CHECKPOINT:
648 return nilfs_ioctl_delete_checkpoint(inode, filp, cmd, argp);
649 case NILFS_IOCTL_GET_CPINFO:
650 return nilfs_ioctl_get_cpinfo(inode, filp, cmd, argp);
651 case NILFS_IOCTL_GET_CPSTAT:
652 return nilfs_ioctl_get_cpstat(inode, filp, cmd, argp);
653 case NILFS_IOCTL_GET_SUINFO:
654 return nilfs_ioctl_get_suinfo(inode, filp, cmd, argp);
655 case NILFS_IOCTL_GET_SUSTAT:
656 return nilfs_ioctl_get_sustat(inode, filp, cmd, argp);
657 case NILFS_IOCTL_GET_VINFO:
658 /* XXX: rename to ??? */
659 return nilfs_ioctl_get_vinfo(inode, filp, cmd, argp);
660 case NILFS_IOCTL_GET_BDESCS:
661 return nilfs_ioctl_get_bdescs(inode, filp, cmd, argp);
662 case NILFS_IOCTL_CLEAN_SEGMENTS:
663 return nilfs_ioctl_clean_segments(inode, filp, cmd, argp);
664 case NILFS_IOCTL_TIMEDWAIT:
665 return nilfs_ioctl_timedwait(inode, filp, cmd, argp);
666 case NILFS_IOCTL_SYNC:
667 return nilfs_ioctl_sync(inode, filp, cmd, argp);
668 default:
669 return -ENOTTY;
670 }
671}
672
673/* compat_ioctl */
674#ifdef CONFIG_COMPAT
675#include <linux/compat.h>
676
677static int nilfs_compat_locked_ioctl(struct inode *inode, struct file *filp,
678 unsigned int cmd, unsigned long arg)
679{
680 int ret;
681
682 lock_kernel();
683 ret = nilfs_ioctl(inode, filp, cmd, arg);
684 unlock_kernel();
685 return ret;
686}
687
688static int
689nilfs_compat_ioctl_uargv32_to_uargv(struct nilfs_argv32 __user *uargv32,
690 struct nilfs_argv __user *uargv)
691{
692 compat_uptr_t base;
693 compat_size_t nmembs, size;
694 compat_int_t index, flags;
695
696 if (get_user(base, &uargv32->v_base) ||
697 put_user(compat_ptr(base), &uargv->v_base) ||
698 get_user(nmembs, &uargv32->v_nmembs) ||
699 put_user(nmembs, &uargv->v_nmembs) ||
700 get_user(size, &uargv32->v_size) ||
701 put_user(size, &uargv->v_size) ||
702 get_user(index, &uargv32->v_index) ||
703 put_user(index, &uargv->v_index) ||
704 get_user(flags, &uargv32->v_flags) ||
705 put_user(flags, &uargv->v_flags))
706 return -EFAULT;
707 return 0;
708}
709
710static int
711nilfs_compat_ioctl_uargv_to_uargv32(struct nilfs_argv __user *uargv,
712 struct nilfs_argv32 __user *uargv32)
713{
714 size_t nmembs;
715
716 if (get_user(nmembs, &uargv->v_nmembs) ||
717 put_user(nmembs, &uargv32->v_nmembs))
718 return -EFAULT;
719 return 0;
720}
721
722static int
723nilfs_compat_ioctl_get_by_argv(struct inode *inode, struct file *filp,
724 unsigned int cmd, unsigned long arg)
725{
726 struct nilfs_argv __user *uargv;
727 struct nilfs_argv32 __user *uargv32;
728 int ret;
729
730 uargv = compat_alloc_user_space(sizeof(struct nilfs_argv));
731 uargv32 = compat_ptr(arg);
732 ret = nilfs_compat_ioctl_uargv32_to_uargv(uargv32, uargv);
733 if (ret < 0)
734 return ret;
735
736 ret = nilfs_compat_locked_ioctl(inode, filp, cmd, (unsigned long)uargv);
737 if (ret < 0)
738 return ret;
739
740 return nilfs_compat_ioctl_uargv_to_uargv32(uargv, uargv32);
741}
742
743static int
744nilfs_compat_ioctl_change_cpmode(struct inode *inode, struct file *filp,
745 unsigned int cmd, unsigned long arg)
746{
747 struct nilfs_cpmode __user *ucpmode;
748 struct nilfs_cpmode32 __user *ucpmode32;
749 int mode;
750
751 ucpmode = compat_alloc_user_space(sizeof(struct nilfs_cpmode));
752 ucpmode32 = compat_ptr(arg);
753 if (copy_in_user(&ucpmode->cm_cno, &ucpmode32->cm_cno,
754 sizeof(__u64)) ||
755 get_user(mode, &ucpmode32->cm_mode) ||
756 put_user(mode, &ucpmode->cm_mode))
757 return -EFAULT;
758
759 return nilfs_compat_locked_ioctl(
760 inode, filp, cmd, (unsigned long)ucpmode);
761}
762
763
764static inline int
765nilfs_compat_ioctl_delete_checkpoint(struct inode *inode, struct file *filp,
766 unsigned int cmd, unsigned long arg)
767{
768 return nilfs_compat_locked_ioctl(inode, filp, cmd, arg);
769}
770
771static inline int
772nilfs_compat_ioctl_get_cpinfo(struct inode *inode, struct file *filp,
773 unsigned int cmd, unsigned long arg)
774{
775 return nilfs_compat_ioctl_get_by_argv(inode, filp, cmd, arg);
776}
777
778static inline int
779nilfs_compat_ioctl_get_cpstat(struct inode *inode, struct file *filp,
780 unsigned int cmd, unsigned long arg)
781{
782 return nilfs_compat_locked_ioctl(inode, filp, cmd, arg);
783}
784
785static inline int
786nilfs_compat_ioctl_get_suinfo(struct inode *inode, struct file *filp,
787 unsigned int cmd, unsigned long arg)
788{
789 return nilfs_compat_ioctl_get_by_argv(inode, filp, cmd, arg);
790}
791
792static int
793nilfs_compat_ioctl_get_sustat(struct inode *inode, struct file *filp,
794 unsigned int cmd, unsigned long arg)
795{
796 struct nilfs_sustat __user *usustat;
797 struct nilfs_sustat32 __user *usustat32;
798 time_t ctime, nongc_ctime;
799 int ret;
800
801 usustat = compat_alloc_user_space(sizeof(struct nilfs_sustat));
802 ret = nilfs_compat_locked_ioctl(inode, filp, cmd,
803 (unsigned long)usustat);
804 if (ret < 0)
805 return ret;
806
807 usustat32 = compat_ptr(arg);
808 if (copy_in_user(&usustat32->ss_nsegs, &usustat->ss_nsegs,
809 sizeof(__u64)) ||
810 copy_in_user(&usustat32->ss_ncleansegs, &usustat->ss_ncleansegs,
811 sizeof(__u64)) ||
812 copy_in_user(&usustat32->ss_ndirtysegs, &usustat->ss_ndirtysegs,
813 sizeof(__u64)) ||
814 get_user(ctime, &usustat->ss_ctime) ||
815 put_user(ctime, &usustat32->ss_ctime) ||
816 get_user(nongc_ctime, &usustat->ss_nongc_ctime) ||
817 put_user(nongc_ctime, &usustat32->ss_nongc_ctime))
818 return -EFAULT;
819 return 0;
820}
821
822static inline int
823nilfs_compat_ioctl_get_vinfo(struct inode *inode, struct file *filp,
824 unsigned int cmd, unsigned long arg)
825{
826 return nilfs_compat_ioctl_get_by_argv(inode, filp, cmd, arg);
827}
828
829static inline int
830nilfs_compat_ioctl_get_bdescs(struct inode *inode, struct file *filp,
831 unsigned int cmd, unsigned long arg)
832{
833 return nilfs_compat_ioctl_get_by_argv(inode, filp, cmd, arg);
834}
835
836static int
837nilfs_compat_ioctl_clean_segments(struct inode *inode, struct file *filp,
838 unsigned int cmd, unsigned long arg)
839{
840 struct nilfs_argv __user *uargv;
841 struct nilfs_argv32 __user *uargv32;
842 int i, ret;
843
844 uargv = compat_alloc_user_space(sizeof(struct nilfs_argv) * 5);
845 uargv32 = compat_ptr(arg);
846 for (i = 0; i < 5; i++) {
847 ret = nilfs_compat_ioctl_uargv32_to_uargv(&uargv32[i],
848 &uargv[i]);
849 if (ret < 0)
850 return ret;
851 }
852 return nilfs_compat_locked_ioctl(
853 inode, filp, cmd, (unsigned long)uargv);
854}
855
856static int
857nilfs_compat_ioctl_timedwait(struct inode *inode, struct file *filp,
858 unsigned int cmd, unsigned long arg)
859{
860 struct nilfs_wait_cond __user *uwcond;
861 struct nilfs_wait_cond32 __user *uwcond32;
862 struct timespec ts;
863 int cond, flags, ret;
864
865 uwcond = compat_alloc_user_space(sizeof(struct nilfs_wait_cond));
866 uwcond32 = compat_ptr(arg);
867 if (get_user(cond, &uwcond32->wc_cond) ||
868 put_user(cond, &uwcond->wc_cond) ||
869 get_user(flags, &uwcond32->wc_flags) ||
870 put_user(flags, &uwcond->wc_flags) ||
871 get_user(ts.tv_sec, &uwcond32->wc_timeout.tv_sec) ||
872 get_user(ts.tv_nsec, &uwcond32->wc_timeout.tv_nsec) ||
873 put_user(ts.tv_sec, &uwcond->wc_timeout.tv_sec) ||
874 put_user(ts.tv_nsec, &uwcond->wc_timeout.tv_nsec))
875 return -EFAULT;
876
877 ret = nilfs_compat_locked_ioctl(inode, filp, cmd,
878 (unsigned long)uwcond);
879 if (ret < 0)
880 return ret;
881
882 if (get_user(ts.tv_sec, &uwcond->wc_timeout.tv_sec) ||
883 get_user(ts.tv_nsec, &uwcond->wc_timeout.tv_nsec) ||
884 put_user(ts.tv_sec, &uwcond32->wc_timeout.tv_sec) ||
885 put_user(ts.tv_nsec, &uwcond32->wc_timeout.tv_nsec))
886 return -EFAULT;
887
888 return 0;
889}
890
891static int nilfs_compat_ioctl_sync(struct inode *inode, struct file *filp,
892 unsigned int cmd, unsigned long arg)
893{
894 return nilfs_compat_locked_ioctl(inode, filp, cmd, arg);
895}
896
897long nilfs_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
898{
899 struct inode *inode = filp->f_dentry->d_inode;
900
901 switch (cmd) {
902 case NILFS_IOCTL32_CHANGE_CPMODE:
903 return nilfs_compat_ioctl_change_cpmode(
904 inode, filp, NILFS_IOCTL_CHANGE_CPMODE, arg);
905 case NILFS_IOCTL_DELETE_CHECKPOINT:
906 return nilfs_compat_ioctl_delete_checkpoint(
907 inode, filp, cmd, arg);
908 case NILFS_IOCTL32_GET_CPINFO:
909 return nilfs_compat_ioctl_get_cpinfo(
910 inode, filp, NILFS_IOCTL_GET_CPINFO, arg);
911 case NILFS_IOCTL_GET_CPSTAT:
912 return nilfs_compat_ioctl_get_cpstat(inode, filp, cmd, arg);
913 case NILFS_IOCTL32_GET_SUINFO:
914 return nilfs_compat_ioctl_get_suinfo(
915 inode, filp, NILFS_IOCTL_GET_SUINFO, arg);
916 case NILFS_IOCTL32_GET_SUSTAT:
917 return nilfs_compat_ioctl_get_sustat(
918 inode, filp, NILFS_IOCTL_GET_SUSTAT, arg);
919 case NILFS_IOCTL32_GET_VINFO:
920 return nilfs_compat_ioctl_get_vinfo(
921 inode, filp, NILFS_IOCTL_GET_VINFO, arg);
922 case NILFS_IOCTL32_GET_BDESCS:
923 return nilfs_compat_ioctl_get_bdescs(
924 inode, filp, NILFS_IOCTL_GET_BDESCS, arg);
925 case NILFS_IOCTL32_CLEAN_SEGMENTS:
926 return nilfs_compat_ioctl_clean_segments(
927 inode, filp, NILFS_IOCTL_CLEAN_SEGMENTS, arg);
928 case NILFS_IOCTL32_TIMEDWAIT:
929 return nilfs_compat_ioctl_timedwait(
930 inode, filp, NILFS_IOCTL_TIMEDWAIT, arg);
931 case NILFS_IOCTL_SYNC:
932 return nilfs_compat_ioctl_sync(inode, filp, cmd, arg);
933 default:
934 return -ENOIOCTLCMD;
935 }
936}
937#endif
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