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nilfs2: fix improper return values of nilfs_get_cpinfo ioctl
[net-next-2.6.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 *,
b028fcfc 40 __u64 *, int,
7942b919
KS		 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;
b028fcfc 47 __u64 pos, ppos;
7942b919
KS		 48
49 if (argv->v_nmembs == 0)
50 return 0;
51
3358b4aa
RK		 52 if (argv->v_size > PAGE_SIZE)
53 return -EINVAL;
54
55 buf = (void *)__get_free_pages(GFP_NOFS, 0);
56 if (unlikely(!buf))
7942b919 57 return -ENOMEM;
3358b4aa 58 maxmembs = PAGE_SIZE / argv->v_size;
7942b919
KS		 59
60 ret = 0;
61 total = 0;
b028fcfc 62 pos = argv->v_index;
7942b919
KS		 63 for (i = 0; i < argv->v_nmembs; i += n) {
64 n = (argv->v_nmembs - i < maxmembs) ?
65 argv->v_nmembs - i : maxmembs;
66 if ((dir & _IOC_WRITE) &&
67 copy_from_user(buf,
68 (void __user *)argv->v_base + argv->v_size * i,
69 argv->v_size * n)) {
70 ret = -EFAULT;
71 break;
72 }
b028fcfc
RK		 73 ppos = pos;
74 nr = (*dofunc)(nilfs, &pos, argv->v_flags, buf, argv->v_size,
75 n);
7942b919
KS		 76 if (nr < 0) {
77 ret = nr;
78 break;
79 }
80 if ((dir & _IOC_READ) &&
81 copy_to_user(
82 (void __user *)argv->v_base + argv->v_size * i,
83 buf, argv->v_size * nr)) {
84 ret = -EFAULT;
85 break;
86 }
87 total += nr;
b028fcfc
RK		 88 if ((size_t)nr < n)
89 break;
90 if (pos == ppos)
91 pos += n;
7942b919
KS		 92 }
93 argv->v_nmembs = total;
94
3358b4aa 95 free_pages((unsigned long)buf, 0);
7942b919
KS		 96 return ret;
97}
98
99static int nilfs_ioctl_change_cpmode(struct inode *inode, struct file *filp,
100 unsigned int cmd, void __user *argp)
101{
102 struct inode *cpfile = NILFS_SB(inode->i_sb)->s_nilfs->ns_cpfile;
103 struct nilfs_transaction_info ti;
104 struct nilfs_cpmode cpmode;
105 int ret;
106
107 if (!capable(CAP_SYS_ADMIN))
108 return -EPERM;
109 if (copy_from_user(&cpmode, argp, sizeof(cpmode)))
110 return -EFAULT;
111
112 nilfs_transaction_begin(inode->i_sb, &ti, 0);
113 ret = nilfs_cpfile_change_cpmode(
114 cpfile, cpmode.cm_cno, cpmode.cm_mode);
47420c79
RK		 115 if (unlikely(ret < 0)) {
116 nilfs_transaction_abort(inode->i_sb);
117 return ret;
118 }
119 nilfs_transaction_commit(inode->i_sb); /* never fails */
7942b919
KS		 120 return ret;
121}
122
123static int
124nilfs_ioctl_delete_checkpoint(struct inode *inode, struct file *filp,
125 unsigned int cmd, void __user *argp)
126{
127 struct inode *cpfile = NILFS_SB(inode->i_sb)->s_nilfs->ns_cpfile;
128 struct nilfs_transaction_info ti;
129 __u64 cno;
130 int ret;
131
132 if (!capable(CAP_SYS_ADMIN))
133 return -EPERM;
134 if (copy_from_user(&cno, argp, sizeof(cno)))
135 return -EFAULT;
136
137 nilfs_transaction_begin(inode->i_sb, &ti, 0);
138 ret = nilfs_cpfile_delete_checkpoint(cpfile, cno);
47420c79
RK		 139 if (unlikely(ret < 0)) {
140 nilfs_transaction_abort(inode->i_sb);
141 return ret;
142 }
143 nilfs_transaction_commit(inode->i_sb); /* never fails */
7942b919
KS		 144 return ret;
145}
146
147static ssize_t
b028fcfc 148nilfs_ioctl_do_get_cpinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
7942b919
KS		 149 void *buf, size_t size, size_t nmembs)
150{
b028fcfc 151 return nilfs_cpfile_get_cpinfo(nilfs->ns_cpfile, posp, flags, buf,
7942b919
KS		 152 nmembs);
153}
154
155static int nilfs_ioctl_get_cpinfo(struct inode *inode, struct file *filp,
156 unsigned int cmd, void __user *argp)
157{
158 struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
159 struct nilfs_argv argv;
7942b919
KS		 160 int ret;
161
162 if (copy_from_user(&argv, argp, sizeof(argv)))
163 return -EFAULT;
164
47420c79 165 down_read(&nilfs->ns_segctor_sem);
7942b919
KS		 166 ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd),
167 nilfs_ioctl_do_get_cpinfo);
47420c79
RK		 168 up_read(&nilfs->ns_segctor_sem);
169 if (ret < 0)
170 return ret;
7942b919
KS		 171
172 if (copy_to_user(argp, &argv, sizeof(argv)))
173 ret = -EFAULT;
174 return ret;
175}
176
177static int nilfs_ioctl_get_cpstat(struct inode *inode, struct file *filp,
178 unsigned int cmd, void __user *argp)
179{
47420c79 180 struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
7942b919 181 struct nilfs_cpstat cpstat;
7942b919
KS		 182 int ret;
183
47420c79
RK		 184 down_read(&nilfs->ns_segctor_sem);
185 ret = nilfs_cpfile_get_stat(nilfs->ns_cpfile, &cpstat);
186 up_read(&nilfs->ns_segctor_sem);
7942b919
KS		 187 if (ret < 0)
188 return ret;
189
190 if (copy_to_user(argp, &cpstat, sizeof(cpstat)))
191 ret = -EFAULT;
192 return ret;
193}
194
195static ssize_t
b028fcfc 196nilfs_ioctl_do_get_suinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
7942b919
KS		 197 void *buf, size_t size, size_t nmembs)
198{
b028fcfc 199 return nilfs_sufile_get_suinfo(nilfs->ns_sufile, *posp, buf, nmembs);
7942b919
KS		 200}
201
202static int nilfs_ioctl_get_suinfo(struct inode *inode, struct file *filp,
203 unsigned int cmd, void __user *argp)
204{
205 struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
206 struct nilfs_argv argv;
7942b919
KS		 207 int ret;
208
209 if (copy_from_user(&argv, argp, sizeof(argv)))
210 return -EFAULT;
211
47420c79 212 down_read(&nilfs->ns_segctor_sem);
7942b919
KS		 213 ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd),
214 nilfs_ioctl_do_get_suinfo);
47420c79
RK		 215 up_read(&nilfs->ns_segctor_sem);
216 if (ret < 0)
217 return ret;
7942b919
KS		 218
219 if (copy_to_user(argp, &argv, sizeof(argv)))
220 ret = -EFAULT;
221 return ret;
222}
223
224static int nilfs_ioctl_get_sustat(struct inode *inode, struct file *filp,
225 unsigned int cmd, void __user *argp)
226{
47420c79 227 struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
7942b919 228 struct nilfs_sustat sustat;
7942b919
KS		 229 int ret;
230
47420c79
RK		 231 down_read(&nilfs->ns_segctor_sem);
232 ret = nilfs_sufile_get_stat(nilfs->ns_sufile, &sustat);
233 up_read(&nilfs->ns_segctor_sem);
7942b919
KS		 234 if (ret < 0)
235 return ret;
236
237 if (copy_to_user(argp, &sustat, sizeof(sustat)))
238 ret = -EFAULT;
239 return ret;
240}
241
242static ssize_t
b028fcfc 243nilfs_ioctl_do_get_vinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
7942b919
KS		 244 void *buf, size_t size, size_t nmembs)
245{
246 return nilfs_dat_get_vinfo(nilfs_dat_inode(nilfs), buf, nmembs);
247}
248
249static int nilfs_ioctl_get_vinfo(struct inode *inode, struct file *filp,
250 unsigned int cmd, void __user *argp)
251{
252 struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
253 struct nilfs_argv argv;
7942b919
KS		 254 int ret;
255
256 if (copy_from_user(&argv, argp, sizeof(argv)))
257 return -EFAULT;
258
47420c79 259 down_read(&nilfs->ns_segctor_sem);
7942b919
KS		 260 ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd),
261 nilfs_ioctl_do_get_vinfo);
47420c79
RK		 262 up_read(&nilfs->ns_segctor_sem);
263 if (ret < 0)
264 return ret;
7942b919
KS		 265
266 if (copy_to_user(argp, &argv, sizeof(argv)))
267 ret = -EFAULT;
268 return ret;
269}
270
271static ssize_t
b028fcfc 272nilfs_ioctl_do_get_bdescs(struct the_nilfs *nilfs, __u64 *posp, int flags,
7942b919
KS		 273 void *buf, size_t size, size_t nmembs)
274{
275 struct inode *dat = nilfs_dat_inode(nilfs);
276 struct nilfs_bmap *bmap = NILFS_I(dat)->i_bmap;
277 struct nilfs_bdesc *bdescs = buf;
278 int ret, i;
279
280 for (i = 0; i < nmembs; i++) {
281 ret = nilfs_bmap_lookup_at_level(bmap,
282 bdescs[i].bd_offset,
283 bdescs[i].bd_level + 1,
284 &bdescs[i].bd_blocknr);
285 if (ret < 0) {
286 if (ret != -ENOENT)
287 return ret;
288 bdescs[i].bd_blocknr = 0;
289 }
290 }
291 return nmembs;
292}
293
294static int nilfs_ioctl_get_bdescs(struct inode *inode, struct file *filp,
295 unsigned int cmd, void __user *argp)
296{
297 struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
298 struct nilfs_argv argv;
7942b919
KS		 299 int ret;
300
301 if (copy_from_user(&argv, argp, sizeof(argv)))
302 return -EFAULT;
303
47420c79 304 down_read(&nilfs->ns_segctor_sem);
7942b919
KS		 305 ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd),
306 nilfs_ioctl_do_get_bdescs);
47420c79
RK		 307 up_read(&nilfs->ns_segctor_sem);
308 if (ret < 0)
309 return ret;
7942b919
KS		 310
311 if (copy_to_user(argp, &argv, sizeof(argv)))
312 ret = -EFAULT;
313 return ret;
314}
315
316static int nilfs_ioctl_move_inode_block(struct inode *inode,
317 struct nilfs_vdesc *vdesc,
318 struct list_head *buffers)
319{
320 struct buffer_head *bh;
321 int ret;
322
323 if (vdesc->vd_flags == 0)
324 ret = nilfs_gccache_submit_read_data(
325 inode, vdesc->vd_offset, vdesc->vd_blocknr,
326 vdesc->vd_vblocknr, &bh);
327 else
328 ret = nilfs_gccache_submit_read_node(
329 inode, vdesc->vd_blocknr, vdesc->vd_vblocknr, &bh);
330
331 if (unlikely(ret < 0)) {
332 if (ret == -ENOENT)
333 printk(KERN_CRIT
334 "%s: invalid virtual block address (%s): "
335 "ino=%llu, cno=%llu, offset=%llu, "
336 "blocknr=%llu, vblocknr=%llu\n",
337 __func__, vdesc->vd_flags ? "node" : "data",
338 (unsigned long long)vdesc->vd_ino,
339 (unsigned long long)vdesc->vd_cno,
340 (unsigned long long)vdesc->vd_offset,
341 (unsigned long long)vdesc->vd_blocknr,
342 (unsigned long long)vdesc->vd_vblocknr);
343 return ret;
344 }
345 bh->b_private = vdesc;
346 list_add_tail(&bh->b_assoc_buffers, buffers);
347 return 0;
348}
349
350static ssize_t
b028fcfc 351nilfs_ioctl_do_move_blocks(struct the_nilfs *nilfs, __u64 *posp, int flags,
7942b919
KS		 352 void *buf, size_t size, size_t nmembs)
353{
354 struct inode *inode;
355 struct nilfs_vdesc *vdesc;
356 struct buffer_head *bh, *n;
357 LIST_HEAD(buffers);
358 ino_t ino;
359 __u64 cno;
360 int i, ret;
361
362 for (i = 0, vdesc = buf; i < nmembs; ) {
363 ino = vdesc->vd_ino;
364 cno = vdesc->vd_cno;
365 inode = nilfs_gc_iget(nilfs, ino, cno);
366 if (unlikely(inode == NULL)) {
367 ret = -ENOMEM;
368 goto failed;
369 }
370 do {
371 ret = nilfs_ioctl_move_inode_block(inode, vdesc,
372 &buffers);
373 if (unlikely(ret < 0))
374 goto failed;
375 vdesc++;
376 } while (++i < nmembs &&
377 vdesc->vd_ino == ino && vdesc->vd_cno == cno);
378 }
379
380 list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) {
381 ret = nilfs_gccache_wait_and_mark_dirty(bh);
382 if (unlikely(ret < 0)) {
383 if (ret == -EEXIST) {
384 vdesc = bh->b_private;
385 printk(KERN_CRIT
386 "%s: conflicting %s buffer: "
387 "ino=%llu, cno=%llu, offset=%llu, "
388 "blocknr=%llu, vblocknr=%llu\n",
389 __func__,
390 vdesc->vd_flags ? "node" : "data",
391 (unsigned long long)vdesc->vd_ino,
392 (unsigned long long)vdesc->vd_cno,
393 (unsigned long long)vdesc->vd_offset,
394 (unsigned long long)vdesc->vd_blocknr,
395 (unsigned long long)vdesc->vd_vblocknr);
396 }
397 goto failed;
398 }
399 list_del_init(&bh->b_assoc_buffers);
400 bh->b_private = NULL;
401 brelse(bh);
402 }
403 return nmembs;
404
405 failed:
406 list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) {
407 list_del_init(&bh->b_assoc_buffers);
408 bh->b_private = NULL;
409 brelse(bh);
410 }
411 return ret;
412}
413
414static inline int nilfs_ioctl_move_blocks(struct the_nilfs *nilfs,
415 struct nilfs_argv *argv,
416 int dir)
417{
418 return nilfs_ioctl_wrap_copy(nilfs, argv, dir,
419 nilfs_ioctl_do_move_blocks);
420}
421
422static ssize_t
b028fcfc 423nilfs_ioctl_do_delete_checkpoints(struct the_nilfs *nilfs, __u64 *posp,
7942b919
KS		 424 int flags, void *buf, size_t size,
425 size_t nmembs)
426{
427 struct inode *cpfile = nilfs->ns_cpfile;
428 struct nilfs_period *periods = buf;
429 int ret, i;
430
431 for (i = 0; i < nmembs; i++) {
432 ret = nilfs_cpfile_delete_checkpoints(
433 cpfile, periods[i].p_start, periods[i].p_end);
434 if (ret < 0)
435 return ret;
436 }
437 return nmembs;
438}
439
440static inline int nilfs_ioctl_delete_checkpoints(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_delete_checkpoints);
446}
447
448static ssize_t
b028fcfc 449nilfs_ioctl_do_free_vblocknrs(struct the_nilfs *nilfs, __u64 *posp, int flags,
7942b919
KS		 450 void *buf, size_t size, size_t nmembs)
451{
452 int ret = nilfs_dat_freev(nilfs_dat_inode(nilfs), buf, nmembs);
453
454 return (ret < 0) ? ret : nmembs;
455}
456
457static inline int nilfs_ioctl_free_vblocknrs(struct the_nilfs *nilfs,
458 struct nilfs_argv *argv,
459 int dir)
460{
461 return nilfs_ioctl_wrap_copy(nilfs, argv, dir,
462 nilfs_ioctl_do_free_vblocknrs);
463}
464
465static ssize_t
b028fcfc
RK		 466nilfs_ioctl_do_mark_blocks_dirty(struct the_nilfs *nilfs, __u64 *posp,
467 int flags, void *buf, size_t size,
468 size_t nmembs)
7942b919
KS		 469{
470 struct inode *dat = nilfs_dat_inode(nilfs);
471 struct nilfs_bmap *bmap = NILFS_I(dat)->i_bmap;
472 struct nilfs_bdesc *bdescs = buf;
473 int ret, i;
474
475 for (i = 0; i < nmembs; i++) {
476 /* XXX: use macro or inline func to check liveness */
477 ret = nilfs_bmap_lookup_at_level(bmap,
478 bdescs[i].bd_offset,
479 bdescs[i].bd_level + 1,
480 &bdescs[i].bd_blocknr);
481 if (ret < 0) {
482 if (ret != -ENOENT)
483 return ret;
484 bdescs[i].bd_blocknr = 0;
485 }
486 if (bdescs[i].bd_blocknr != bdescs[i].bd_oblocknr)
487 /* skip dead block */
488 continue;
489 if (bdescs[i].bd_level == 0) {
490 ret = nilfs_mdt_mark_block_dirty(dat,
491 bdescs[i].bd_offset);
492 if (ret < 0) {
493 BUG_ON(ret == -ENOENT);
494 return ret;
495 }
496 } else {
497 ret = nilfs_bmap_mark(bmap, bdescs[i].bd_offset,
498 bdescs[i].bd_level);
499 if (ret < 0) {
500 BUG_ON(ret == -ENOENT);
501 return ret;
502 }
503 }
504 }
505 return nmembs;
506}
507
508static inline int nilfs_ioctl_mark_blocks_dirty(struct the_nilfs *nilfs,
509 struct nilfs_argv *argv,
510 int dir)
511{
512 return nilfs_ioctl_wrap_copy(nilfs, argv, dir,
513 nilfs_ioctl_do_mark_blocks_dirty);
514}
515
516static ssize_t
b028fcfc 517nilfs_ioctl_do_free_segments(struct the_nilfs *nilfs, __u64 *posp, int flags,
7942b919
KS		 518 void *buf, size_t size, size_t nmembs)
519{
520 struct nilfs_sb_info *sbi = nilfs_get_writer(nilfs);
521 int ret;
522
523 BUG_ON(!sbi);
524 ret = nilfs_segctor_add_segments_to_be_freed(
525 NILFS_SC(sbi), buf, nmembs);
526 nilfs_put_writer(nilfs);
527
528 return (ret < 0) ? ret : nmembs;
529}
530
531static inline int nilfs_ioctl_free_segments(struct the_nilfs *nilfs,
532 struct nilfs_argv *argv,
533 int dir)
534{
535 return nilfs_ioctl_wrap_copy(nilfs, argv, dir,
536 nilfs_ioctl_do_free_segments);
537}
538
539int nilfs_ioctl_prepare_clean_segments(struct the_nilfs *nilfs,
540 void __user *argp)
541{
542 struct nilfs_argv argv[5];
543 int dir, ret;
544
545 if (copy_from_user(argv, argp, sizeof(argv)))
546 return -EFAULT;
547
548 dir = _IOC_WRITE;
549 ret = nilfs_ioctl_move_blocks(nilfs, &argv[0], dir);
550 if (ret < 0)
551 goto out_move_blks;
552 ret = nilfs_ioctl_delete_checkpoints(nilfs, &argv[1], dir);
553 if (ret < 0)
554 goto out_del_cps;
555 ret = nilfs_ioctl_free_vblocknrs(nilfs, &argv[2], dir);
556 if (ret < 0)
557 goto out_free_vbns;
558 ret = nilfs_ioctl_mark_blocks_dirty(nilfs, &argv[3], dir);
559 if (ret < 0)
560 goto out_free_vbns;
561 ret = nilfs_ioctl_free_segments(nilfs, &argv[4], dir);
562 if (ret < 0)
563 goto out_free_segs;
564
565 return 0;
566
567 out_free_segs:
568 BUG(); /* XXX: not implemented yet */
569 out_free_vbns:
570 BUG();/* XXX: not implemented yet */
571 out_del_cps:
572 BUG();/* XXX: not implemented yet */
573 out_move_blks:
574 nilfs_remove_all_gcinode(nilfs);
575 return ret;
576}
577
578static int nilfs_ioctl_clean_segments(struct inode *inode, struct file *filp,
579 unsigned int cmd, void __user *argp)
580{
581 int ret;
582
583 if (!capable(CAP_SYS_ADMIN))
584 return -EPERM;
585
586 ret = nilfs_clean_segments(inode->i_sb, argp);
587 clear_nilfs_cond_nongc_write(NILFS_SB(inode->i_sb)->s_nilfs);
588 return ret;
589}
590
591static int nilfs_ioctl_test_cond(struct the_nilfs *nilfs, int cond)
592{
593 return (cond & NILFS_TIMEDWAIT_SEG_WRITE) &&
594 nilfs_cond_nongc_write(nilfs);
595}
596
597static void nilfs_ioctl_clear_cond(struct the_nilfs *nilfs, int cond)
598{
599 if (cond & NILFS_TIMEDWAIT_SEG_WRITE)
600 clear_nilfs_cond_nongc_write(nilfs);
601}
602
603static int nilfs_ioctl_timedwait(struct inode *inode, struct file *filp,
604 unsigned int cmd, void __user *argp)
605{
606 struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
607 struct nilfs_wait_cond wc;
608 long ret;
609
610 if (!capable(CAP_SYS_ADMIN))
611 return -EPERM;
612 if (copy_from_user(&wc, argp, sizeof(wc)))
613 return -EFAULT;
614
615 unlock_kernel();
616 ret = wc.wc_flags ?
617 wait_event_interruptible_timeout(
618 nilfs->ns_cleanerd_wq,
619 nilfs_ioctl_test_cond(nilfs, wc.wc_cond),
620 timespec_to_jiffies(&wc.wc_timeout)) :
621 wait_event_interruptible(
622 nilfs->ns_cleanerd_wq,
623 nilfs_ioctl_test_cond(nilfs, wc.wc_cond));
624 lock_kernel();
625 nilfs_ioctl_clear_cond(nilfs, wc.wc_cond);
626
627 if (ret > 0) {
628 jiffies_to_timespec(ret, &wc.wc_timeout);
629 if (copy_to_user(argp, &wc, sizeof(wc)))
630 return -EFAULT;
631 return 0;
632 }
633 if (ret != 0)
634 return -EINTR;
635
636 return wc.wc_flags ? -ETIME : 0;
637}
638
639static int nilfs_ioctl_sync(struct inode *inode, struct file *filp,
640 unsigned int cmd, void __user *argp)
641{
642 __u64 cno;
643 int ret;
644
645 ret = nilfs_construct_segment(inode->i_sb);
646 if (ret < 0)
647 return ret;
648
649 if (argp != NULL) {
650 cno = NILFS_SB(inode->i_sb)->s_nilfs->ns_cno - 1;
651 if (copy_to_user(argp, &cno, sizeof(cno)))
652 return -EFAULT;
653 }
654 return 0;
655}
656
657int nilfs_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
658 unsigned long arg)
659{
660 void __user *argp = (void * __user *)arg;
661
662 switch (cmd) {
663 case NILFS_IOCTL_CHANGE_CPMODE:
664 return nilfs_ioctl_change_cpmode(inode, filp, cmd, argp);
665 case NILFS_IOCTL_DELETE_CHECKPOINT:
666 return nilfs_ioctl_delete_checkpoint(inode, filp, cmd, argp);
667 case NILFS_IOCTL_GET_CPINFO:
668 return nilfs_ioctl_get_cpinfo(inode, filp, cmd, argp);
669 case NILFS_IOCTL_GET_CPSTAT:
670 return nilfs_ioctl_get_cpstat(inode, filp, cmd, argp);
671 case NILFS_IOCTL_GET_SUINFO:
672 return nilfs_ioctl_get_suinfo(inode, filp, cmd, argp);
673 case NILFS_IOCTL_GET_SUSTAT:
674 return nilfs_ioctl_get_sustat(inode, filp, cmd, argp);
675 case NILFS_IOCTL_GET_VINFO:
676 /* XXX: rename to ??? */
677 return nilfs_ioctl_get_vinfo(inode, filp, cmd, argp);
678 case NILFS_IOCTL_GET_BDESCS:
679 return nilfs_ioctl_get_bdescs(inode, filp, cmd, argp);
680 case NILFS_IOCTL_CLEAN_SEGMENTS:
681 return nilfs_ioctl_clean_segments(inode, filp, cmd, argp);
682 case NILFS_IOCTL_TIMEDWAIT:
683 return nilfs_ioctl_timedwait(inode, filp, cmd, argp);
684 case NILFS_IOCTL_SYNC:
685 return nilfs_ioctl_sync(inode, filp, cmd, argp);
686 default:
687 return -ENOTTY;
688 }
689}
690
691/* compat_ioctl */
692#ifdef CONFIG_COMPAT
693#include <linux/compat.h>
694
695static int nilfs_compat_locked_ioctl(struct inode *inode, struct file *filp,
696 unsigned int cmd, unsigned long arg)
697{
698 int ret;
699
700 lock_kernel();
701 ret = nilfs_ioctl(inode, filp, cmd, arg);
702 unlock_kernel();
703 return ret;
704}
705
706static int
707nilfs_compat_ioctl_uargv32_to_uargv(struct nilfs_argv32 __user *uargv32,
708 struct nilfs_argv __user *uargv)
709{
710 compat_uptr_t base;
711 compat_size_t nmembs, size;
712 compat_int_t index, flags;
713
714 if (get_user(base, &uargv32->v_base) ||
715 put_user(compat_ptr(base), &uargv->v_base) ||
716 get_user(nmembs, &uargv32->v_nmembs) ||
717 put_user(nmembs, &uargv->v_nmembs) ||
718 get_user(size, &uargv32->v_size) ||
719 put_user(size, &uargv->v_size) ||
720 get_user(index, &uargv32->v_index) ||
721 put_user(index, &uargv->v_index) ||
722 get_user(flags, &uargv32->v_flags) ||
723 put_user(flags, &uargv->v_flags))
724 return -EFAULT;
725 return 0;
726}
727
728static int
729nilfs_compat_ioctl_uargv_to_uargv32(struct nilfs_argv __user *uargv,
730 struct nilfs_argv32 __user *uargv32)
731{
732 size_t nmembs;
733
734 if (get_user(nmembs, &uargv->v_nmembs) ||
735 put_user(nmembs, &uargv32->v_nmembs))
736 return -EFAULT;
737 return 0;
738}
739
740static int
741nilfs_compat_ioctl_get_by_argv(struct inode *inode, struct file *filp,
742 unsigned int cmd, unsigned long arg)
743{
744 struct nilfs_argv __user *uargv;
745 struct nilfs_argv32 __user *uargv32;
746 int ret;
747
748 uargv = compat_alloc_user_space(sizeof(struct nilfs_argv));
749 uargv32 = compat_ptr(arg);
750 ret = nilfs_compat_ioctl_uargv32_to_uargv(uargv32, uargv);
751 if (ret < 0)
752 return ret;
753
754 ret = nilfs_compat_locked_ioctl(inode, filp, cmd, (unsigned long)uargv);
755 if (ret < 0)
756 return ret;
757
758 return nilfs_compat_ioctl_uargv_to_uargv32(uargv, uargv32);
759}
760
761static int
762nilfs_compat_ioctl_change_cpmode(struct inode *inode, struct file *filp,
763 unsigned int cmd, unsigned long arg)
764{
765 struct nilfs_cpmode __user *ucpmode;
766 struct nilfs_cpmode32 __user *ucpmode32;
767 int mode;
768
769 ucpmode = compat_alloc_user_space(sizeof(struct nilfs_cpmode));
770 ucpmode32 = compat_ptr(arg);
771 if (copy_in_user(&ucpmode->cm_cno, &ucpmode32->cm_cno,
772 sizeof(__u64)) ||
773 get_user(mode, &ucpmode32->cm_mode) ||
774 put_user(mode, &ucpmode->cm_mode))
775 return -EFAULT;
776
777 return nilfs_compat_locked_ioctl(
778 inode, filp, cmd, (unsigned long)ucpmode);
779}
780
781
782static inline int
783nilfs_compat_ioctl_delete_checkpoint(struct inode *inode, struct file *filp,
784 unsigned int cmd, unsigned long arg)
785{
786 return nilfs_compat_locked_ioctl(inode, filp, cmd, arg);
787}
788
789static inline int
790nilfs_compat_ioctl_get_cpinfo(struct inode *inode, struct file *filp,
791 unsigned int cmd, unsigned long arg)
792{
793 return nilfs_compat_ioctl_get_by_argv(inode, filp, cmd, arg);
794}
795
796static inline int
797nilfs_compat_ioctl_get_cpstat(struct inode *inode, struct file *filp,
798 unsigned int cmd, unsigned long arg)
799{
800 return nilfs_compat_locked_ioctl(inode, filp, cmd, arg);
801}
802
803static inline int
804nilfs_compat_ioctl_get_suinfo(struct inode *inode, struct file *filp,
805 unsigned int cmd, unsigned long arg)
806{
807 return nilfs_compat_ioctl_get_by_argv(inode, filp, cmd, arg);
808}
809
810static int
811nilfs_compat_ioctl_get_sustat(struct inode *inode, struct file *filp,
812 unsigned int cmd, unsigned long arg)
813{
814 struct nilfs_sustat __user *usustat;
815 struct nilfs_sustat32 __user *usustat32;
816 time_t ctime, nongc_ctime;
817 int ret;
818
819 usustat = compat_alloc_user_space(sizeof(struct nilfs_sustat));
820 ret = nilfs_compat_locked_ioctl(inode, filp, cmd,
821 (unsigned long)usustat);
822 if (ret < 0)
823 return ret;
824
825 usustat32 = compat_ptr(arg);
826 if (copy_in_user(&usustat32->ss_nsegs, &usustat->ss_nsegs,
827 sizeof(__u64)) ||
828 copy_in_user(&usustat32->ss_ncleansegs, &usustat->ss_ncleansegs,
829 sizeof(__u64)) ||
830 copy_in_user(&usustat32->ss_ndirtysegs, &usustat->ss_ndirtysegs,
831 sizeof(__u64)) ||
832 get_user(ctime, &usustat->ss_ctime) ||
833 put_user(ctime, &usustat32->ss_ctime) ||
834 get_user(nongc_ctime, &usustat->ss_nongc_ctime) ||
835 put_user(nongc_ctime, &usustat32->ss_nongc_ctime))
836 return -EFAULT;
837 return 0;
838}
839
840static inline int
841nilfs_compat_ioctl_get_vinfo(struct inode *inode, struct file *filp,
842 unsigned int cmd, unsigned long arg)
843{
844 return nilfs_compat_ioctl_get_by_argv(inode, filp, cmd, arg);
845}
846
847static inline int
848nilfs_compat_ioctl_get_bdescs(struct inode *inode, struct file *filp,
849 unsigned int cmd, unsigned long arg)
850{
851 return nilfs_compat_ioctl_get_by_argv(inode, filp, cmd, arg);
852}
853
854static int
855nilfs_compat_ioctl_clean_segments(struct inode *inode, struct file *filp,
856 unsigned int cmd, unsigned long arg)
857{
858 struct nilfs_argv __user *uargv;
859 struct nilfs_argv32 __user *uargv32;
860 int i, ret;
861
862 uargv = compat_alloc_user_space(sizeof(struct nilfs_argv) * 5);
863 uargv32 = compat_ptr(arg);
864 for (i = 0; i < 5; i++) {
865 ret = nilfs_compat_ioctl_uargv32_to_uargv(&uargv32[i],
866 &uargv[i]);
867 if (ret < 0)
868 return ret;
869 }
870 return nilfs_compat_locked_ioctl(
871 inode, filp, cmd, (unsigned long)uargv);
872}
873
874static int
875nilfs_compat_ioctl_timedwait(struct inode *inode, struct file *filp,
876 unsigned int cmd, unsigned long arg)
877{
878 struct nilfs_wait_cond __user *uwcond;
879 struct nilfs_wait_cond32 __user *uwcond32;
880 struct timespec ts;
881 int cond, flags, ret;
882
883 uwcond = compat_alloc_user_space(sizeof(struct nilfs_wait_cond));
884 uwcond32 = compat_ptr(arg);
885 if (get_user(cond, &uwcond32->wc_cond) ||
886 put_user(cond, &uwcond->wc_cond) ||
887 get_user(flags, &uwcond32->wc_flags) ||
888 put_user(flags, &uwcond->wc_flags) ||
889 get_user(ts.tv_sec, &uwcond32->wc_timeout.tv_sec) ||
890 get_user(ts.tv_nsec, &uwcond32->wc_timeout.tv_nsec) ||
891 put_user(ts.tv_sec, &uwcond->wc_timeout.tv_sec) ||
892 put_user(ts.tv_nsec, &uwcond->wc_timeout.tv_nsec))
893 return -EFAULT;
894
895 ret = nilfs_compat_locked_ioctl(inode, filp, cmd,
896 (unsigned long)uwcond);
897 if (ret < 0)
898 return ret;
899
900 if (get_user(ts.tv_sec, &uwcond->wc_timeout.tv_sec) ||
901 get_user(ts.tv_nsec, &uwcond->wc_timeout.tv_nsec) ||
902 put_user(ts.tv_sec, &uwcond32->wc_timeout.tv_sec) ||
903 put_user(ts.tv_nsec, &uwcond32->wc_timeout.tv_nsec))
904 return -EFAULT;
905
906 return 0;
907}
908
909static int nilfs_compat_ioctl_sync(struct inode *inode, struct file *filp,
910 unsigned int cmd, unsigned long arg)
911{
912 return nilfs_compat_locked_ioctl(inode, filp, cmd, arg);
913}
914
915long nilfs_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
916{
917 struct inode *inode = filp->f_dentry->d_inode;
918
919 switch (cmd) {
920 case NILFS_IOCTL32_CHANGE_CPMODE:
921 return nilfs_compat_ioctl_change_cpmode(
922 inode, filp, NILFS_IOCTL_CHANGE_CPMODE, arg);
923 case NILFS_IOCTL_DELETE_CHECKPOINT:
924 return nilfs_compat_ioctl_delete_checkpoint(
925 inode, filp, cmd, arg);
926 case NILFS_IOCTL32_GET_CPINFO:
927 return nilfs_compat_ioctl_get_cpinfo(
928 inode, filp, NILFS_IOCTL_GET_CPINFO, arg);
929 case NILFS_IOCTL_GET_CPSTAT:
930 return nilfs_compat_ioctl_get_cpstat(inode, filp, cmd, arg);
931 case NILFS_IOCTL32_GET_SUINFO:
932 return nilfs_compat_ioctl_get_suinfo(
933 inode, filp, NILFS_IOCTL_GET_SUINFO, arg);
934 case NILFS_IOCTL32_GET_SUSTAT:
935 return nilfs_compat_ioctl_get_sustat(
936 inode, filp, NILFS_IOCTL_GET_SUSTAT, arg);
937 case NILFS_IOCTL32_GET_VINFO:
938 return nilfs_compat_ioctl_get_vinfo(
939 inode, filp, NILFS_IOCTL_GET_VINFO, arg);
940 case NILFS_IOCTL32_GET_BDESCS:
941 return nilfs_compat_ioctl_get_bdescs(
942 inode, filp, NILFS_IOCTL_GET_BDESCS, arg);
943 case NILFS_IOCTL32_CLEAN_SEGMENTS:
944 return nilfs_compat_ioctl_clean_segments(
945 inode, filp, NILFS_IOCTL_CLEAN_SEGMENTS, arg);
946 case NILFS_IOCTL32_TIMEDWAIT:
947 return nilfs_compat_ioctl_timedwait(
948 inode, filp, NILFS_IOCTL_TIMEDWAIT, arg);
949 case NILFS_IOCTL_SYNC:
950 return nilfs_compat_ioctl_sync(inode, filp, cmd, arg);
951 default:
952 return -ENOIOCTLCMD;
953 }
954}
955#endif
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