Loading...
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 * Written by Koji Sato.
17 */
18
19#include <linux/fs.h>
20#include <linux/wait.h>
21#include <linux/slab.h>
22#include <linux/capability.h> /* capable() */
23#include <linux/uaccess.h> /* copy_from_user(), copy_to_user() */
24#include <linux/vmalloc.h>
25#include <linux/compat.h> /* compat_ptr() */
26#include <linux/mount.h> /* mnt_want_write_file(), mnt_drop_write_file() */
27#include <linux/buffer_head.h>
28#include "nilfs.h"
29#include "segment.h"
30#include "bmap.h"
31#include "cpfile.h"
32#include "sufile.h"
33#include "dat.h"
34
35/**
36 * nilfs_ioctl_wrap_copy - wrapping function of get/set metadata info
37 * @nilfs: nilfs object
38 * @argv: vector of arguments from userspace
39 * @dir: set of direction flags
40 * @dofunc: concrete function of get/set metadata info
41 *
42 * Description: nilfs_ioctl_wrap_copy() gets/sets metadata info by means of
43 * calling dofunc() function on the basis of @argv argument.
44 *
45 * Return Value: On success, 0 is returned and requested metadata info
46 * is copied into userspace. On error, one of the following
47 * negative error codes is returned.
48 *
49 * %-EINVAL - Invalid arguments from userspace.
50 *
51 * %-ENOMEM - Insufficient amount of memory available.
52 *
53 * %-EFAULT - Failure during execution of requested operation.
54 */
55static int nilfs_ioctl_wrap_copy(struct the_nilfs *nilfs,
56 struct nilfs_argv *argv, int dir,
57 ssize_t (*dofunc)(struct the_nilfs *,
58 __u64 *, int,
59 void *, size_t, size_t))
60{
61 void *buf;
62 void __user *base = (void __user *)(unsigned long)argv->v_base;
63 size_t maxmembs, total, n;
64 ssize_t nr;
65 int ret, i;
66 __u64 pos, ppos;
67
68 if (argv->v_nmembs == 0)
69 return 0;
70
71 if (argv->v_size > PAGE_SIZE)
72 return -EINVAL;
73
74 /*
75 * Reject pairs of a start item position (argv->v_index) and a
76 * total count (argv->v_nmembs) which leads position 'pos' to
77 * overflow by the increment at the end of the loop.
78 */
79 if (argv->v_index > ~(__u64)0 - argv->v_nmembs)
80 return -EINVAL;
81
82 buf = (void *)__get_free_pages(GFP_NOFS, 0);
83 if (unlikely(!buf))
84 return -ENOMEM;
85 maxmembs = PAGE_SIZE / argv->v_size;
86
87 ret = 0;
88 total = 0;
89 pos = argv->v_index;
90 for (i = 0; i < argv->v_nmembs; i += n) {
91 n = (argv->v_nmembs - i < maxmembs) ?
92 argv->v_nmembs - i : maxmembs;
93 if ((dir & _IOC_WRITE) &&
94 copy_from_user(buf, base + argv->v_size * i,
95 argv->v_size * n)) {
96 ret = -EFAULT;
97 break;
98 }
99 ppos = pos;
100 nr = dofunc(nilfs, &pos, argv->v_flags, buf, argv->v_size,
101 n);
102 if (nr < 0) {
103 ret = nr;
104 break;
105 }
106 if ((dir & _IOC_READ) &&
107 copy_to_user(base + argv->v_size * i, buf,
108 argv->v_size * nr)) {
109 ret = -EFAULT;
110 break;
111 }
112 total += nr;
113 if ((size_t)nr < n)
114 break;
115 if (pos == ppos)
116 pos += n;
117 }
118 argv->v_nmembs = total;
119
120 free_pages((unsigned long)buf, 0);
121 return ret;
122}
123
124/**
125 * nilfs_ioctl_getflags - ioctl to support lsattr
126 */
127static int nilfs_ioctl_getflags(struct inode *inode, void __user *argp)
128{
129 unsigned int flags = NILFS_I(inode)->i_flags & FS_FL_USER_VISIBLE;
130
131 return put_user(flags, (int __user *)argp);
132}
133
134/**
135 * nilfs_ioctl_setflags - ioctl to support chattr
136 */
137static int nilfs_ioctl_setflags(struct inode *inode, struct file *filp,
138 void __user *argp)
139{
140 struct nilfs_transaction_info ti;
141 unsigned int flags, oldflags;
142 int ret;
143
144 if (!inode_owner_or_capable(inode))
145 return -EACCES;
146
147 if (get_user(flags, (int __user *)argp))
148 return -EFAULT;
149
150 ret = mnt_want_write_file(filp);
151 if (ret)
152 return ret;
153
154 flags = nilfs_mask_flags(inode->i_mode, flags);
155
156 inode_lock(inode);
157
158 oldflags = NILFS_I(inode)->i_flags;
159
160 /*
161 * The IMMUTABLE and APPEND_ONLY flags can only be changed by the
162 * relevant capability.
163 */
164 ret = -EPERM;
165 if (((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) &&
166 !capable(CAP_LINUX_IMMUTABLE))
167 goto out;
168
169 ret = nilfs_transaction_begin(inode->i_sb, &ti, 0);
170 if (ret)
171 goto out;
172
173 NILFS_I(inode)->i_flags = (oldflags & ~FS_FL_USER_MODIFIABLE) |
174 (flags & FS_FL_USER_MODIFIABLE);
175
176 nilfs_set_inode_flags(inode);
177 inode->i_ctime = current_time(inode);
178 if (IS_SYNC(inode))
179 nilfs_set_transaction_flag(NILFS_TI_SYNC);
180
181 nilfs_mark_inode_dirty(inode);
182 ret = nilfs_transaction_commit(inode->i_sb);
183out:
184 inode_unlock(inode);
185 mnt_drop_write_file(filp);
186 return ret;
187}
188
189/**
190 * nilfs_ioctl_getversion - get info about a file's version (generation number)
191 */
192static int nilfs_ioctl_getversion(struct inode *inode, void __user *argp)
193{
194 return put_user(inode->i_generation, (int __user *)argp);
195}
196
197/**
198 * nilfs_ioctl_change_cpmode - change checkpoint mode (checkpoint/snapshot)
199 * @inode: inode object
200 * @filp: file object
201 * @cmd: ioctl's request code
202 * @argp: pointer on argument from userspace
203 *
204 * Description: nilfs_ioctl_change_cpmode() function changes mode of
205 * given checkpoint between checkpoint and snapshot state. This ioctl
206 * is used in chcp and mkcp utilities.
207 *
208 * Return Value: On success, 0 is returned and mode of a checkpoint is
209 * changed. On error, one of the following negative error codes
210 * is returned.
211 *
212 * %-EPERM - Operation not permitted.
213 *
214 * %-EFAULT - Failure during checkpoint mode changing.
215 */
216static int nilfs_ioctl_change_cpmode(struct inode *inode, struct file *filp,
217 unsigned int cmd, void __user *argp)
218{
219 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
220 struct nilfs_transaction_info ti;
221 struct nilfs_cpmode cpmode;
222 int ret;
223
224 if (!capable(CAP_SYS_ADMIN))
225 return -EPERM;
226
227 ret = mnt_want_write_file(filp);
228 if (ret)
229 return ret;
230
231 ret = -EFAULT;
232 if (copy_from_user(&cpmode, argp, sizeof(cpmode)))
233 goto out;
234
235 mutex_lock(&nilfs->ns_snapshot_mount_mutex);
236
237 nilfs_transaction_begin(inode->i_sb, &ti, 0);
238 ret = nilfs_cpfile_change_cpmode(
239 nilfs->ns_cpfile, cpmode.cm_cno, cpmode.cm_mode);
240 if (unlikely(ret < 0))
241 nilfs_transaction_abort(inode->i_sb);
242 else
243 nilfs_transaction_commit(inode->i_sb); /* never fails */
244
245 mutex_unlock(&nilfs->ns_snapshot_mount_mutex);
246out:
247 mnt_drop_write_file(filp);
248 return ret;
249}
250
251/**
252 * nilfs_ioctl_delete_checkpoint - remove checkpoint
253 * @inode: inode object
254 * @filp: file object
255 * @cmd: ioctl's request code
256 * @argp: pointer on argument from userspace
257 *
258 * Description: nilfs_ioctl_delete_checkpoint() function removes
259 * checkpoint from NILFS2 file system. This ioctl is used in rmcp
260 * utility.
261 *
262 * Return Value: On success, 0 is returned and a checkpoint is
263 * removed. On error, one of the following negative error codes
264 * is returned.
265 *
266 * %-EPERM - Operation not permitted.
267 *
268 * %-EFAULT - Failure during checkpoint removing.
269 */
270static int
271nilfs_ioctl_delete_checkpoint(struct inode *inode, struct file *filp,
272 unsigned int cmd, void __user *argp)
273{
274 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
275 struct nilfs_transaction_info ti;
276 __u64 cno;
277 int ret;
278
279 if (!capable(CAP_SYS_ADMIN))
280 return -EPERM;
281
282 ret = mnt_want_write_file(filp);
283 if (ret)
284 return ret;
285
286 ret = -EFAULT;
287 if (copy_from_user(&cno, argp, sizeof(cno)))
288 goto out;
289
290 nilfs_transaction_begin(inode->i_sb, &ti, 0);
291 ret = nilfs_cpfile_delete_checkpoint(nilfs->ns_cpfile, cno);
292 if (unlikely(ret < 0))
293 nilfs_transaction_abort(inode->i_sb);
294 else
295 nilfs_transaction_commit(inode->i_sb); /* never fails */
296out:
297 mnt_drop_write_file(filp);
298 return ret;
299}
300
301/**
302 * nilfs_ioctl_do_get_cpinfo - callback method getting info about checkpoints
303 * @nilfs: nilfs object
304 * @posp: pointer on array of checkpoint's numbers
305 * @flags: checkpoint mode (checkpoint or snapshot)
306 * @buf: buffer for storing checkponts' info
307 * @size: size in bytes of one checkpoint info item in array
308 * @nmembs: number of checkpoints in array (numbers and infos)
309 *
310 * Description: nilfs_ioctl_do_get_cpinfo() function returns info about
311 * requested checkpoints. The NILFS_IOCTL_GET_CPINFO ioctl is used in
312 * lscp utility and by nilfs_cleanerd daemon.
313 *
314 * Return value: count of nilfs_cpinfo structures in output buffer.
315 */
316static ssize_t
317nilfs_ioctl_do_get_cpinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
318 void *buf, size_t size, size_t nmembs)
319{
320 int ret;
321
322 down_read(&nilfs->ns_segctor_sem);
323 ret = nilfs_cpfile_get_cpinfo(nilfs->ns_cpfile, posp, flags, buf,
324 size, nmembs);
325 up_read(&nilfs->ns_segctor_sem);
326 return ret;
327}
328
329/**
330 * nilfs_ioctl_get_cpstat - get checkpoints statistics
331 * @inode: inode object
332 * @filp: file object
333 * @cmd: ioctl's request code
334 * @argp: pointer on argument from userspace
335 *
336 * Description: nilfs_ioctl_get_cpstat() returns information about checkpoints.
337 * The NILFS_IOCTL_GET_CPSTAT ioctl is used by lscp, rmcp utilities
338 * and by nilfs_cleanerd daemon.
339 *
340 * Return Value: On success, 0 is returned, and checkpoints information is
341 * copied into userspace pointer @argp. On error, one of the following
342 * negative error codes is returned.
343 *
344 * %-EIO - I/O error.
345 *
346 * %-ENOMEM - Insufficient amount of memory available.
347 *
348 * %-EFAULT - Failure during getting checkpoints statistics.
349 */
350static int nilfs_ioctl_get_cpstat(struct inode *inode, struct file *filp,
351 unsigned int cmd, void __user *argp)
352{
353 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
354 struct nilfs_cpstat cpstat;
355 int ret;
356
357 down_read(&nilfs->ns_segctor_sem);
358 ret = nilfs_cpfile_get_stat(nilfs->ns_cpfile, &cpstat);
359 up_read(&nilfs->ns_segctor_sem);
360 if (ret < 0)
361 return ret;
362
363 if (copy_to_user(argp, &cpstat, sizeof(cpstat)))
364 ret = -EFAULT;
365 return ret;
366}
367
368/**
369 * nilfs_ioctl_do_get_suinfo - callback method getting segment usage info
370 * @nilfs: nilfs object
371 * @posp: pointer on array of segment numbers
372 * @flags: *not used*
373 * @buf: buffer for storing suinfo array
374 * @size: size in bytes of one suinfo item in array
375 * @nmembs: count of segment numbers and suinfos in array
376 *
377 * Description: nilfs_ioctl_do_get_suinfo() function returns segment usage
378 * info about requested segments. The NILFS_IOCTL_GET_SUINFO ioctl is used
379 * in lssu, nilfs_resize utilities and by nilfs_cleanerd daemon.
380 *
381 * Return value: count of nilfs_suinfo structures in output buffer.
382 */
383static ssize_t
384nilfs_ioctl_do_get_suinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
385 void *buf, size_t size, size_t nmembs)
386{
387 int ret;
388
389 down_read(&nilfs->ns_segctor_sem);
390 ret = nilfs_sufile_get_suinfo(nilfs->ns_sufile, *posp, buf, size,
391 nmembs);
392 up_read(&nilfs->ns_segctor_sem);
393 return ret;
394}
395
396/**
397 * nilfs_ioctl_get_sustat - get segment usage statistics
398 * @inode: inode object
399 * @filp: file object
400 * @cmd: ioctl's request code
401 * @argp: pointer on argument from userspace
402 *
403 * Description: nilfs_ioctl_get_sustat() returns segment usage statistics.
404 * The NILFS_IOCTL_GET_SUSTAT ioctl is used in lssu, nilfs_resize utilities
405 * and by nilfs_cleanerd daemon.
406 *
407 * Return Value: On success, 0 is returned, and segment usage information is
408 * copied into userspace pointer @argp. On error, one of the following
409 * negative error codes is returned.
410 *
411 * %-EIO - I/O error.
412 *
413 * %-ENOMEM - Insufficient amount of memory available.
414 *
415 * %-EFAULT - Failure during getting segment usage statistics.
416 */
417static int nilfs_ioctl_get_sustat(struct inode *inode, struct file *filp,
418 unsigned int cmd, void __user *argp)
419{
420 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
421 struct nilfs_sustat sustat;
422 int ret;
423
424 down_read(&nilfs->ns_segctor_sem);
425 ret = nilfs_sufile_get_stat(nilfs->ns_sufile, &sustat);
426 up_read(&nilfs->ns_segctor_sem);
427 if (ret < 0)
428 return ret;
429
430 if (copy_to_user(argp, &sustat, sizeof(sustat)))
431 ret = -EFAULT;
432 return ret;
433}
434
435/**
436 * nilfs_ioctl_do_get_vinfo - callback method getting virtual blocks info
437 * @nilfs: nilfs object
438 * @posp: *not used*
439 * @flags: *not used*
440 * @buf: buffer for storing array of nilfs_vinfo structures
441 * @size: size in bytes of one vinfo item in array
442 * @nmembs: count of vinfos in array
443 *
444 * Description: nilfs_ioctl_do_get_vinfo() function returns information
445 * on virtual block addresses. The NILFS_IOCTL_GET_VINFO ioctl is used
446 * by nilfs_cleanerd daemon.
447 *
448 * Return value: count of nilfs_vinfo structures in output buffer.
449 */
450static ssize_t
451nilfs_ioctl_do_get_vinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
452 void *buf, size_t size, size_t nmembs)
453{
454 int ret;
455
456 down_read(&nilfs->ns_segctor_sem);
457 ret = nilfs_dat_get_vinfo(nilfs->ns_dat, buf, size, nmembs);
458 up_read(&nilfs->ns_segctor_sem);
459 return ret;
460}
461
462/**
463 * nilfs_ioctl_do_get_bdescs - callback method getting disk block descriptors
464 * @nilfs: nilfs object
465 * @posp: *not used*
466 * @flags: *not used*
467 * @buf: buffer for storing array of nilfs_bdesc structures
468 * @size: size in bytes of one bdesc item in array
469 * @nmembs: count of bdescs in array
470 *
471 * Description: nilfs_ioctl_do_get_bdescs() function returns information
472 * about descriptors of disk block numbers. The NILFS_IOCTL_GET_BDESCS ioctl
473 * is used by nilfs_cleanerd daemon.
474 *
475 * Return value: count of nilfs_bdescs structures in output buffer.
476 */
477static ssize_t
478nilfs_ioctl_do_get_bdescs(struct the_nilfs *nilfs, __u64 *posp, int flags,
479 void *buf, size_t size, size_t nmembs)
480{
481 struct nilfs_bmap *bmap = NILFS_I(nilfs->ns_dat)->i_bmap;
482 struct nilfs_bdesc *bdescs = buf;
483 int ret, i;
484
485 down_read(&nilfs->ns_segctor_sem);
486 for (i = 0; i < nmembs; i++) {
487 ret = nilfs_bmap_lookup_at_level(bmap,
488 bdescs[i].bd_offset,
489 bdescs[i].bd_level + 1,
490 &bdescs[i].bd_blocknr);
491 if (ret < 0) {
492 if (ret != -ENOENT) {
493 up_read(&nilfs->ns_segctor_sem);
494 return ret;
495 }
496 bdescs[i].bd_blocknr = 0;
497 }
498 }
499 up_read(&nilfs->ns_segctor_sem);
500 return nmembs;
501}
502
503/**
504 * nilfs_ioctl_get_bdescs - get disk block descriptors
505 * @inode: inode object
506 * @filp: file object
507 * @cmd: ioctl's request code
508 * @argp: pointer on argument from userspace
509 *
510 * Description: nilfs_ioctl_do_get_bdescs() function returns information
511 * about descriptors of disk block numbers. The NILFS_IOCTL_GET_BDESCS ioctl
512 * is used by nilfs_cleanerd daemon.
513 *
514 * Return Value: On success, 0 is returned, and disk block descriptors are
515 * copied into userspace pointer @argp. On error, one of the following
516 * negative error codes is returned.
517 *
518 * %-EINVAL - Invalid arguments from userspace.
519 *
520 * %-EIO - I/O error.
521 *
522 * %-ENOMEM - Insufficient amount of memory available.
523 *
524 * %-EFAULT - Failure during getting disk block descriptors.
525 */
526static int nilfs_ioctl_get_bdescs(struct inode *inode, struct file *filp,
527 unsigned int cmd, void __user *argp)
528{
529 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
530 struct nilfs_argv argv;
531 int ret;
532
533 if (copy_from_user(&argv, argp, sizeof(argv)))
534 return -EFAULT;
535
536 if (argv.v_size != sizeof(struct nilfs_bdesc))
537 return -EINVAL;
538
539 ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd),
540 nilfs_ioctl_do_get_bdescs);
541 if (ret < 0)
542 return ret;
543
544 if (copy_to_user(argp, &argv, sizeof(argv)))
545 ret = -EFAULT;
546 return ret;
547}
548
549/**
550 * nilfs_ioctl_move_inode_block - prepare data/node block for moving by GC
551 * @inode: inode object
552 * @vdesc: descriptor of virtual block number
553 * @buffers: list of moving buffers
554 *
555 * Description: nilfs_ioctl_move_inode_block() function registers data/node
556 * buffer in the GC pagecache and submit read request.
557 *
558 * Return Value: On success, 0 is returned. On error, one of the following
559 * negative error codes is returned.
560 *
561 * %-EIO - I/O error.
562 *
563 * %-ENOMEM - Insufficient amount of memory available.
564 *
565 * %-ENOENT - Requested block doesn't exist.
566 *
567 * %-EEXIST - Blocks conflict is detected.
568 */
569static int nilfs_ioctl_move_inode_block(struct inode *inode,
570 struct nilfs_vdesc *vdesc,
571 struct list_head *buffers)
572{
573 struct buffer_head *bh;
574 int ret;
575
576 if (vdesc->vd_flags == 0)
577 ret = nilfs_gccache_submit_read_data(
578 inode, vdesc->vd_offset, vdesc->vd_blocknr,
579 vdesc->vd_vblocknr, &bh);
580 else
581 ret = nilfs_gccache_submit_read_node(
582 inode, vdesc->vd_blocknr, vdesc->vd_vblocknr, &bh);
583
584 if (unlikely(ret < 0)) {
585 if (ret == -ENOENT)
586 nilfs_msg(inode->i_sb, KERN_CRIT,
587 "%s: invalid virtual block address (%s): ino=%llu, cno=%llu, offset=%llu, blocknr=%llu, vblocknr=%llu",
588 __func__, vdesc->vd_flags ? "node" : "data",
589 (unsigned long long)vdesc->vd_ino,
590 (unsigned long long)vdesc->vd_cno,
591 (unsigned long long)vdesc->vd_offset,
592 (unsigned long long)vdesc->vd_blocknr,
593 (unsigned long long)vdesc->vd_vblocknr);
594 return ret;
595 }
596 if (unlikely(!list_empty(&bh->b_assoc_buffers))) {
597 nilfs_msg(inode->i_sb, KERN_CRIT,
598 "%s: conflicting %s buffer: ino=%llu, cno=%llu, offset=%llu, blocknr=%llu, vblocknr=%llu",
599 __func__, vdesc->vd_flags ? "node" : "data",
600 (unsigned long long)vdesc->vd_ino,
601 (unsigned long long)vdesc->vd_cno,
602 (unsigned long long)vdesc->vd_offset,
603 (unsigned long long)vdesc->vd_blocknr,
604 (unsigned long long)vdesc->vd_vblocknr);
605 brelse(bh);
606 return -EEXIST;
607 }
608 list_add_tail(&bh->b_assoc_buffers, buffers);
609 return 0;
610}
611
612/**
613 * nilfs_ioctl_move_blocks - move valid inode's blocks during garbage collection
614 * @sb: superblock object
615 * @argv: vector of arguments from userspace
616 * @buf: array of nilfs_vdesc structures
617 *
618 * Description: nilfs_ioctl_move_blocks() function reads valid data/node
619 * blocks that garbage collector specified with the array of nilfs_vdesc
620 * structures and stores them into page caches of GC inodes.
621 *
622 * Return Value: Number of processed nilfs_vdesc structures or
623 * error code, otherwise.
624 */
625static int nilfs_ioctl_move_blocks(struct super_block *sb,
626 struct nilfs_argv *argv, void *buf)
627{
628 size_t nmembs = argv->v_nmembs;
629 struct the_nilfs *nilfs = sb->s_fs_info;
630 struct inode *inode;
631 struct nilfs_vdesc *vdesc;
632 struct buffer_head *bh, *n;
633 LIST_HEAD(buffers);
634 ino_t ino;
635 __u64 cno;
636 int i, ret;
637
638 for (i = 0, vdesc = buf; i < nmembs; ) {
639 ino = vdesc->vd_ino;
640 cno = vdesc->vd_cno;
641 inode = nilfs_iget_for_gc(sb, ino, cno);
642 if (IS_ERR(inode)) {
643 ret = PTR_ERR(inode);
644 goto failed;
645 }
646 if (list_empty(&NILFS_I(inode)->i_dirty)) {
647 /*
648 * Add the inode to GC inode list. Garbage Collection
649 * is serialized and no two processes manipulate the
650 * list simultaneously.
651 */
652 igrab(inode);
653 list_add(&NILFS_I(inode)->i_dirty,
654 &nilfs->ns_gc_inodes);
655 }
656
657 do {
658 ret = nilfs_ioctl_move_inode_block(inode, vdesc,
659 &buffers);
660 if (unlikely(ret < 0)) {
661 iput(inode);
662 goto failed;
663 }
664 vdesc++;
665 } while (++i < nmembs &&
666 vdesc->vd_ino == ino && vdesc->vd_cno == cno);
667
668 iput(inode); /* The inode still remains in GC inode list */
669 }
670
671 list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) {
672 ret = nilfs_gccache_wait_and_mark_dirty(bh);
673 if (unlikely(ret < 0)) {
674 WARN_ON(ret == -EEXIST);
675 goto failed;
676 }
677 list_del_init(&bh->b_assoc_buffers);
678 brelse(bh);
679 }
680 return nmembs;
681
682 failed:
683 list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) {
684 list_del_init(&bh->b_assoc_buffers);
685 brelse(bh);
686 }
687 return ret;
688}
689
690/**
691 * nilfs_ioctl_delete_checkpoints - delete checkpoints
692 * @nilfs: nilfs object
693 * @argv: vector of arguments from userspace
694 * @buf: array of periods of checkpoints numbers
695 *
696 * Description: nilfs_ioctl_delete_checkpoints() function deletes checkpoints
697 * in the period from p_start to p_end, excluding p_end itself. The checkpoints
698 * which have been already deleted are ignored.
699 *
700 * Return Value: Number of processed nilfs_period structures or
701 * error code, otherwise.
702 *
703 * %-EIO - I/O error.
704 *
705 * %-ENOMEM - Insufficient amount of memory available.
706 *
707 * %-EINVAL - invalid checkpoints.
708 */
709static int nilfs_ioctl_delete_checkpoints(struct the_nilfs *nilfs,
710 struct nilfs_argv *argv, void *buf)
711{
712 size_t nmembs = argv->v_nmembs;
713 struct inode *cpfile = nilfs->ns_cpfile;
714 struct nilfs_period *periods = buf;
715 int ret, i;
716
717 for (i = 0; i < nmembs; i++) {
718 ret = nilfs_cpfile_delete_checkpoints(
719 cpfile, periods[i].p_start, periods[i].p_end);
720 if (ret < 0)
721 return ret;
722 }
723 return nmembs;
724}
725
726/**
727 * nilfs_ioctl_free_vblocknrs - free virtual block numbers
728 * @nilfs: nilfs object
729 * @argv: vector of arguments from userspace
730 * @buf: array of virtual block numbers
731 *
732 * Description: nilfs_ioctl_free_vblocknrs() function frees
733 * the virtual block numbers specified by @buf and @argv->v_nmembs.
734 *
735 * Return Value: Number of processed virtual block numbers or
736 * error code, otherwise.
737 *
738 * %-EIO - I/O error.
739 *
740 * %-ENOMEM - Insufficient amount of memory available.
741 *
742 * %-ENOENT - The virtual block number have not been allocated.
743 */
744static int nilfs_ioctl_free_vblocknrs(struct the_nilfs *nilfs,
745 struct nilfs_argv *argv, void *buf)
746{
747 size_t nmembs = argv->v_nmembs;
748 int ret;
749
750 ret = nilfs_dat_freev(nilfs->ns_dat, buf, nmembs);
751
752 return (ret < 0) ? ret : nmembs;
753}
754
755/**
756 * nilfs_ioctl_mark_blocks_dirty - mark blocks dirty
757 * @nilfs: nilfs object
758 * @argv: vector of arguments from userspace
759 * @buf: array of block descriptors
760 *
761 * Description: nilfs_ioctl_mark_blocks_dirty() function marks
762 * metadata file or data blocks as dirty.
763 *
764 * Return Value: Number of processed block descriptors or
765 * error code, otherwise.
766 *
767 * %-ENOMEM - Insufficient memory available.
768 *
769 * %-EIO - I/O error
770 *
771 * %-ENOENT - the specified block does not exist (hole block)
772 */
773static int nilfs_ioctl_mark_blocks_dirty(struct the_nilfs *nilfs,
774 struct nilfs_argv *argv, void *buf)
775{
776 size_t nmembs = argv->v_nmembs;
777 struct nilfs_bmap *bmap = NILFS_I(nilfs->ns_dat)->i_bmap;
778 struct nilfs_bdesc *bdescs = buf;
779 struct buffer_head *bh;
780 int ret, i;
781
782 for (i = 0; i < nmembs; i++) {
783 /* XXX: use macro or inline func to check liveness */
784 ret = nilfs_bmap_lookup_at_level(bmap,
785 bdescs[i].bd_offset,
786 bdescs[i].bd_level + 1,
787 &bdescs[i].bd_blocknr);
788 if (ret < 0) {
789 if (ret != -ENOENT)
790 return ret;
791 bdescs[i].bd_blocknr = 0;
792 }
793 if (bdescs[i].bd_blocknr != bdescs[i].bd_oblocknr)
794 /* skip dead block */
795 continue;
796 if (bdescs[i].bd_level == 0) {
797 ret = nilfs_mdt_get_block(nilfs->ns_dat,
798 bdescs[i].bd_offset,
799 false, NULL, &bh);
800 if (unlikely(ret)) {
801 WARN_ON(ret == -ENOENT);
802 return ret;
803 }
804 mark_buffer_dirty(bh);
805 nilfs_mdt_mark_dirty(nilfs->ns_dat);
806 put_bh(bh);
807 } else {
808 ret = nilfs_bmap_mark(bmap, bdescs[i].bd_offset,
809 bdescs[i].bd_level);
810 if (ret < 0) {
811 WARN_ON(ret == -ENOENT);
812 return ret;
813 }
814 }
815 }
816 return nmembs;
817}
818
819int nilfs_ioctl_prepare_clean_segments(struct the_nilfs *nilfs,
820 struct nilfs_argv *argv, void **kbufs)
821{
822 const char *msg;
823 int ret;
824
825 ret = nilfs_ioctl_delete_checkpoints(nilfs, &argv[1], kbufs[1]);
826 if (ret < 0) {
827 /*
828 * can safely abort because checkpoints can be removed
829 * independently.
830 */
831 msg = "cannot delete checkpoints";
832 goto failed;
833 }
834 ret = nilfs_ioctl_free_vblocknrs(nilfs, &argv[2], kbufs[2]);
835 if (ret < 0) {
836 /*
837 * can safely abort because DAT file is updated atomically
838 * using a copy-on-write technique.
839 */
840 msg = "cannot delete virtual blocks from DAT file";
841 goto failed;
842 }
843 ret = nilfs_ioctl_mark_blocks_dirty(nilfs, &argv[3], kbufs[3]);
844 if (ret < 0) {
845 /*
846 * can safely abort because the operation is nondestructive.
847 */
848 msg = "cannot mark copying blocks dirty";
849 goto failed;
850 }
851 return 0;
852
853 failed:
854 nilfs_msg(nilfs->ns_sb, KERN_ERR, "error %d preparing GC: %s", ret,
855 msg);
856 return ret;
857}
858
859/**
860 * nilfs_ioctl_clean_segments - clean segments
861 * @inode: inode object
862 * @filp: file object
863 * @cmd: ioctl's request code
864 * @argp: pointer on argument from userspace
865 *
866 * Description: nilfs_ioctl_clean_segments() function makes garbage
867 * collection operation in the environment of requested parameters
868 * from userspace. The NILFS_IOCTL_CLEAN_SEGMENTS ioctl is used by
869 * nilfs_cleanerd daemon.
870 *
871 * Return Value: On success, 0 is returned or error code, otherwise.
872 */
873static int nilfs_ioctl_clean_segments(struct inode *inode, struct file *filp,
874 unsigned int cmd, void __user *argp)
875{
876 struct nilfs_argv argv[5];
877 static const size_t argsz[5] = {
878 sizeof(struct nilfs_vdesc),
879 sizeof(struct nilfs_period),
880 sizeof(__u64),
881 sizeof(struct nilfs_bdesc),
882 sizeof(__u64),
883 };
884 void __user *base;
885 void *kbufs[5];
886 struct the_nilfs *nilfs;
887 size_t len, nsegs;
888 int n, ret;
889
890 if (!capable(CAP_SYS_ADMIN))
891 return -EPERM;
892
893 ret = mnt_want_write_file(filp);
894 if (ret)
895 return ret;
896
897 ret = -EFAULT;
898 if (copy_from_user(argv, argp, sizeof(argv)))
899 goto out;
900
901 ret = -EINVAL;
902 nsegs = argv[4].v_nmembs;
903 if (argv[4].v_size != argsz[4])
904 goto out;
905 if (nsegs > UINT_MAX / sizeof(__u64))
906 goto out;
907
908 /*
909 * argv[4] points to segment numbers this ioctl cleans. We
910 * use kmalloc() for its buffer because memory used for the
911 * segment numbers is enough small.
912 */
913 kbufs[4] = memdup_user((void __user *)(unsigned long)argv[4].v_base,
914 nsegs * sizeof(__u64));
915 if (IS_ERR(kbufs[4])) {
916 ret = PTR_ERR(kbufs[4]);
917 goto out;
918 }
919 nilfs = inode->i_sb->s_fs_info;
920
921 for (n = 0; n < 4; n++) {
922 ret = -EINVAL;
923 if (argv[n].v_size != argsz[n])
924 goto out_free;
925
926 if (argv[n].v_nmembs > nsegs * nilfs->ns_blocks_per_segment)
927 goto out_free;
928
929 if (argv[n].v_nmembs >= UINT_MAX / argv[n].v_size)
930 goto out_free;
931
932 len = argv[n].v_size * argv[n].v_nmembs;
933 base = (void __user *)(unsigned long)argv[n].v_base;
934 if (len == 0) {
935 kbufs[n] = NULL;
936 continue;
937 }
938
939 kbufs[n] = vmalloc(len);
940 if (!kbufs[n]) {
941 ret = -ENOMEM;
942 goto out_free;
943 }
944 if (copy_from_user(kbufs[n], base, len)) {
945 ret = -EFAULT;
946 vfree(kbufs[n]);
947 goto out_free;
948 }
949 }
950
951 /*
952 * nilfs_ioctl_move_blocks() will call nilfs_iget_for_gc(),
953 * which will operates an inode list without blocking.
954 * To protect the list from concurrent operations,
955 * nilfs_ioctl_move_blocks should be atomic operation.
956 */
957 if (test_and_set_bit(THE_NILFS_GC_RUNNING, &nilfs->ns_flags)) {
958 ret = -EBUSY;
959 goto out_free;
960 }
961
962 ret = nilfs_ioctl_move_blocks(inode->i_sb, &argv[0], kbufs[0]);
963 if (ret < 0) {
964 nilfs_msg(inode->i_sb, KERN_ERR,
965 "error %d preparing GC: cannot read source blocks",
966 ret);
967 } else {
968 if (nilfs_sb_need_update(nilfs))
969 set_nilfs_discontinued(nilfs);
970 ret = nilfs_clean_segments(inode->i_sb, argv, kbufs);
971 }
972
973 nilfs_remove_all_gcinodes(nilfs);
974 clear_nilfs_gc_running(nilfs);
975
976out_free:
977 while (--n >= 0)
978 vfree(kbufs[n]);
979 kfree(kbufs[4]);
980out:
981 mnt_drop_write_file(filp);
982 return ret;
983}
984
985/**
986 * nilfs_ioctl_sync - make a checkpoint
987 * @inode: inode object
988 * @filp: file object
989 * @cmd: ioctl's request code
990 * @argp: pointer on argument from userspace
991 *
992 * Description: nilfs_ioctl_sync() function constructs a logical segment
993 * for checkpointing. This function guarantees that all modified data
994 * and metadata are written out to the device when it successfully
995 * returned.
996 *
997 * Return Value: On success, 0 is retured. On errors, one of the following
998 * negative error code is returned.
999 *
1000 * %-EROFS - Read only filesystem.
1001 *
1002 * %-EIO - I/O error
1003 *
1004 * %-ENOSPC - No space left on device (only in a panic state).
1005 *
1006 * %-ERESTARTSYS - Interrupted.
1007 *
1008 * %-ENOMEM - Insufficient memory available.
1009 *
1010 * %-EFAULT - Failure during execution of requested operation.
1011 */
1012static int nilfs_ioctl_sync(struct inode *inode, struct file *filp,
1013 unsigned int cmd, void __user *argp)
1014{
1015 __u64 cno;
1016 int ret;
1017 struct the_nilfs *nilfs;
1018
1019 ret = nilfs_construct_segment(inode->i_sb);
1020 if (ret < 0)
1021 return ret;
1022
1023 nilfs = inode->i_sb->s_fs_info;
1024 ret = nilfs_flush_device(nilfs);
1025 if (ret < 0)
1026 return ret;
1027
1028 if (argp != NULL) {
1029 down_read(&nilfs->ns_segctor_sem);
1030 cno = nilfs->ns_cno - 1;
1031 up_read(&nilfs->ns_segctor_sem);
1032 if (copy_to_user(argp, &cno, sizeof(cno)))
1033 return -EFAULT;
1034 }
1035 return 0;
1036}
1037
1038/**
1039 * nilfs_ioctl_resize - resize NILFS2 volume
1040 * @inode: inode object
1041 * @filp: file object
1042 * @argp: pointer on argument from userspace
1043 *
1044 * Return Value: On success, 0 is returned or error code, otherwise.
1045 */
1046static int nilfs_ioctl_resize(struct inode *inode, struct file *filp,
1047 void __user *argp)
1048{
1049 __u64 newsize;
1050 int ret = -EPERM;
1051
1052 if (!capable(CAP_SYS_ADMIN))
1053 goto out;
1054
1055 ret = mnt_want_write_file(filp);
1056 if (ret)
1057 goto out;
1058
1059 ret = -EFAULT;
1060 if (copy_from_user(&newsize, argp, sizeof(newsize)))
1061 goto out_drop_write;
1062
1063 ret = nilfs_resize_fs(inode->i_sb, newsize);
1064
1065out_drop_write:
1066 mnt_drop_write_file(filp);
1067out:
1068 return ret;
1069}
1070
1071/**
1072 * nilfs_ioctl_trim_fs() - trim ioctl handle function
1073 * @inode: inode object
1074 * @argp: pointer on argument from userspace
1075 *
1076 * Decription: nilfs_ioctl_trim_fs is the FITRIM ioctl handle function. It
1077 * checks the arguments from userspace and calls nilfs_sufile_trim_fs, which
1078 * performs the actual trim operation.
1079 *
1080 * Return Value: On success, 0 is returned or negative error code, otherwise.
1081 */
1082static int nilfs_ioctl_trim_fs(struct inode *inode, void __user *argp)
1083{
1084 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
1085 struct request_queue *q = bdev_get_queue(nilfs->ns_bdev);
1086 struct fstrim_range range;
1087 int ret;
1088
1089 if (!capable(CAP_SYS_ADMIN))
1090 return -EPERM;
1091
1092 if (!blk_queue_discard(q))
1093 return -EOPNOTSUPP;
1094
1095 if (copy_from_user(&range, argp, sizeof(range)))
1096 return -EFAULT;
1097
1098 range.minlen = max_t(u64, range.minlen, q->limits.discard_granularity);
1099
1100 down_read(&nilfs->ns_segctor_sem);
1101 ret = nilfs_sufile_trim_fs(nilfs->ns_sufile, &range);
1102 up_read(&nilfs->ns_segctor_sem);
1103
1104 if (ret < 0)
1105 return ret;
1106
1107 if (copy_to_user(argp, &range, sizeof(range)))
1108 return -EFAULT;
1109
1110 return 0;
1111}
1112
1113/**
1114 * nilfs_ioctl_set_alloc_range - limit range of segments to be allocated
1115 * @inode: inode object
1116 * @argp: pointer on argument from userspace
1117 *
1118 * Decription: nilfs_ioctl_set_alloc_range() function defines lower limit
1119 * of segments in bytes and upper limit of segments in bytes.
1120 * The NILFS_IOCTL_SET_ALLOC_RANGE is used by nilfs_resize utility.
1121 *
1122 * Return Value: On success, 0 is returned or error code, otherwise.
1123 */
1124static int nilfs_ioctl_set_alloc_range(struct inode *inode, void __user *argp)
1125{
1126 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
1127 __u64 range[2];
1128 __u64 minseg, maxseg;
1129 unsigned long segbytes;
1130 int ret = -EPERM;
1131
1132 if (!capable(CAP_SYS_ADMIN))
1133 goto out;
1134
1135 ret = -EFAULT;
1136 if (copy_from_user(range, argp, sizeof(__u64[2])))
1137 goto out;
1138
1139 ret = -ERANGE;
1140 if (range[1] > i_size_read(inode->i_sb->s_bdev->bd_inode))
1141 goto out;
1142
1143 segbytes = nilfs->ns_blocks_per_segment * nilfs->ns_blocksize;
1144
1145 minseg = range[0] + segbytes - 1;
1146 do_div(minseg, segbytes);
1147 maxseg = NILFS_SB2_OFFSET_BYTES(range[1]);
1148 do_div(maxseg, segbytes);
1149 maxseg--;
1150
1151 ret = nilfs_sufile_set_alloc_range(nilfs->ns_sufile, minseg, maxseg);
1152out:
1153 return ret;
1154}
1155
1156/**
1157 * nilfs_ioctl_get_info - wrapping function of get metadata info
1158 * @inode: inode object
1159 * @filp: file object
1160 * @cmd: ioctl's request code
1161 * @argp: pointer on argument from userspace
1162 * @membsz: size of an item in bytes
1163 * @dofunc: concrete function of getting metadata info
1164 *
1165 * Description: nilfs_ioctl_get_info() gets metadata info by means of
1166 * calling dofunc() function.
1167 *
1168 * Return Value: On success, 0 is returned and requested metadata info
1169 * is copied into userspace. On error, one of the following
1170 * negative error codes is returned.
1171 *
1172 * %-EINVAL - Invalid arguments from userspace.
1173 *
1174 * %-ENOMEM - Insufficient amount of memory available.
1175 *
1176 * %-EFAULT - Failure during execution of requested operation.
1177 */
1178static int nilfs_ioctl_get_info(struct inode *inode, struct file *filp,
1179 unsigned int cmd, void __user *argp,
1180 size_t membsz,
1181 ssize_t (*dofunc)(struct the_nilfs *,
1182 __u64 *, int,
1183 void *, size_t, size_t))
1184
1185{
1186 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
1187 struct nilfs_argv argv;
1188 int ret;
1189
1190 if (copy_from_user(&argv, argp, sizeof(argv)))
1191 return -EFAULT;
1192
1193 if (argv.v_size < membsz)
1194 return -EINVAL;
1195
1196 ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), dofunc);
1197 if (ret < 0)
1198 return ret;
1199
1200 if (copy_to_user(argp, &argv, sizeof(argv)))
1201 ret = -EFAULT;
1202 return ret;
1203}
1204
1205/**
1206 * nilfs_ioctl_set_suinfo - set segment usage info
1207 * @inode: inode object
1208 * @filp: file object
1209 * @cmd: ioctl's request code
1210 * @argp: pointer on argument from userspace
1211 *
1212 * Description: Expects an array of nilfs_suinfo_update structures
1213 * encapsulated in nilfs_argv and updates the segment usage info
1214 * according to the flags in nilfs_suinfo_update.
1215 *
1216 * Return Value: On success, 0 is returned. On error, one of the
1217 * following negative error codes is returned.
1218 *
1219 * %-EPERM - Not enough permissions
1220 *
1221 * %-EFAULT - Error copying input data
1222 *
1223 * %-EIO - I/O error.
1224 *
1225 * %-ENOMEM - Insufficient amount of memory available.
1226 *
1227 * %-EINVAL - Invalid values in input (segment number, flags or nblocks)
1228 */
1229static int nilfs_ioctl_set_suinfo(struct inode *inode, struct file *filp,
1230 unsigned int cmd, void __user *argp)
1231{
1232 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
1233 struct nilfs_transaction_info ti;
1234 struct nilfs_argv argv;
1235 size_t len;
1236 void __user *base;
1237 void *kbuf;
1238 int ret;
1239
1240 if (!capable(CAP_SYS_ADMIN))
1241 return -EPERM;
1242
1243 ret = mnt_want_write_file(filp);
1244 if (ret)
1245 return ret;
1246
1247 ret = -EFAULT;
1248 if (copy_from_user(&argv, argp, sizeof(argv)))
1249 goto out;
1250
1251 ret = -EINVAL;
1252 if (argv.v_size < sizeof(struct nilfs_suinfo_update))
1253 goto out;
1254
1255 if (argv.v_nmembs > nilfs->ns_nsegments)
1256 goto out;
1257
1258 if (argv.v_nmembs >= UINT_MAX / argv.v_size)
1259 goto out;
1260
1261 len = argv.v_size * argv.v_nmembs;
1262 if (!len) {
1263 ret = 0;
1264 goto out;
1265 }
1266
1267 base = (void __user *)(unsigned long)argv.v_base;
1268 kbuf = vmalloc(len);
1269 if (!kbuf) {
1270 ret = -ENOMEM;
1271 goto out;
1272 }
1273
1274 if (copy_from_user(kbuf, base, len)) {
1275 ret = -EFAULT;
1276 goto out_free;
1277 }
1278
1279 nilfs_transaction_begin(inode->i_sb, &ti, 0);
1280 ret = nilfs_sufile_set_suinfo(nilfs->ns_sufile, kbuf, argv.v_size,
1281 argv.v_nmembs);
1282 if (unlikely(ret < 0))
1283 nilfs_transaction_abort(inode->i_sb);
1284 else
1285 nilfs_transaction_commit(inode->i_sb); /* never fails */
1286
1287out_free:
1288 vfree(kbuf);
1289out:
1290 mnt_drop_write_file(filp);
1291 return ret;
1292}
1293
1294long nilfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1295{
1296 struct inode *inode = file_inode(filp);
1297 void __user *argp = (void __user *)arg;
1298
1299 switch (cmd) {
1300 case FS_IOC_GETFLAGS:
1301 return nilfs_ioctl_getflags(inode, argp);
1302 case FS_IOC_SETFLAGS:
1303 return nilfs_ioctl_setflags(inode, filp, argp);
1304 case FS_IOC_GETVERSION:
1305 return nilfs_ioctl_getversion(inode, argp);
1306 case NILFS_IOCTL_CHANGE_CPMODE:
1307 return nilfs_ioctl_change_cpmode(inode, filp, cmd, argp);
1308 case NILFS_IOCTL_DELETE_CHECKPOINT:
1309 return nilfs_ioctl_delete_checkpoint(inode, filp, cmd, argp);
1310 case NILFS_IOCTL_GET_CPINFO:
1311 return nilfs_ioctl_get_info(inode, filp, cmd, argp,
1312 sizeof(struct nilfs_cpinfo),
1313 nilfs_ioctl_do_get_cpinfo);
1314 case NILFS_IOCTL_GET_CPSTAT:
1315 return nilfs_ioctl_get_cpstat(inode, filp, cmd, argp);
1316 case NILFS_IOCTL_GET_SUINFO:
1317 return nilfs_ioctl_get_info(inode, filp, cmd, argp,
1318 sizeof(struct nilfs_suinfo),
1319 nilfs_ioctl_do_get_suinfo);
1320 case NILFS_IOCTL_SET_SUINFO:
1321 return nilfs_ioctl_set_suinfo(inode, filp, cmd, argp);
1322 case NILFS_IOCTL_GET_SUSTAT:
1323 return nilfs_ioctl_get_sustat(inode, filp, cmd, argp);
1324 case NILFS_IOCTL_GET_VINFO:
1325 return nilfs_ioctl_get_info(inode, filp, cmd, argp,
1326 sizeof(struct nilfs_vinfo),
1327 nilfs_ioctl_do_get_vinfo);
1328 case NILFS_IOCTL_GET_BDESCS:
1329 return nilfs_ioctl_get_bdescs(inode, filp, cmd, argp);
1330 case NILFS_IOCTL_CLEAN_SEGMENTS:
1331 return nilfs_ioctl_clean_segments(inode, filp, cmd, argp);
1332 case NILFS_IOCTL_SYNC:
1333 return nilfs_ioctl_sync(inode, filp, cmd, argp);
1334 case NILFS_IOCTL_RESIZE:
1335 return nilfs_ioctl_resize(inode, filp, argp);
1336 case NILFS_IOCTL_SET_ALLOC_RANGE:
1337 return nilfs_ioctl_set_alloc_range(inode, argp);
1338 case FITRIM:
1339 return nilfs_ioctl_trim_fs(inode, argp);
1340 default:
1341 return -ENOTTY;
1342 }
1343}
1344
1345#ifdef CONFIG_COMPAT
1346long nilfs_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1347{
1348 switch (cmd) {
1349 case FS_IOC32_GETFLAGS:
1350 cmd = FS_IOC_GETFLAGS;
1351 break;
1352 case FS_IOC32_SETFLAGS:
1353 cmd = FS_IOC_SETFLAGS;
1354 break;
1355 case FS_IOC32_GETVERSION:
1356 cmd = FS_IOC_GETVERSION;
1357 break;
1358 case NILFS_IOCTL_CHANGE_CPMODE:
1359 case NILFS_IOCTL_DELETE_CHECKPOINT:
1360 case NILFS_IOCTL_GET_CPINFO:
1361 case NILFS_IOCTL_GET_CPSTAT:
1362 case NILFS_IOCTL_GET_SUINFO:
1363 case NILFS_IOCTL_SET_SUINFO:
1364 case NILFS_IOCTL_GET_SUSTAT:
1365 case NILFS_IOCTL_GET_VINFO:
1366 case NILFS_IOCTL_GET_BDESCS:
1367 case NILFS_IOCTL_CLEAN_SEGMENTS:
1368 case NILFS_IOCTL_SYNC:
1369 case NILFS_IOCTL_RESIZE:
1370 case NILFS_IOCTL_SET_ALLOC_RANGE:
1371 break;
1372 default:
1373 return -ENOIOCTLCMD;
1374 }
1375 return nilfs_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
1376}
1377#endif
1/*
2 * ioctl.c - NILFS ioctl operations.
3 *
4 * Copyright (C) 2007, 2008 Nippon Telegraph and Telephone Corporation.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 *
20 * Written by Koji Sato <koji@osrg.net>.
21 */
22
23#include <linux/fs.h>
24#include <linux/wait.h>
25#include <linux/slab.h>
26#include <linux/capability.h> /* capable() */
27#include <linux/uaccess.h> /* copy_from_user(), copy_to_user() */
28#include <linux/vmalloc.h>
29#include <linux/compat.h> /* compat_ptr() */
30#include <linux/mount.h> /* mnt_want_write_file(), mnt_drop_write_file() */
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/**
41 * nilfs_ioctl_wrap_copy - wrapping function of get/set metadata info
42 * @nilfs: nilfs object
43 * @argv: vector of arguments from userspace
44 * @dir: set of direction flags
45 * @dofunc: concrete function of get/set metadata info
46 *
47 * Description: nilfs_ioctl_wrap_copy() gets/sets metadata info by means of
48 * calling dofunc() function on the basis of @argv argument.
49 *
50 * Return Value: On success, 0 is returned and requested metadata info
51 * is copied into userspace. On error, one of the following
52 * negative error codes is returned.
53 *
54 * %-EINVAL - Invalid arguments from userspace.
55 *
56 * %-ENOMEM - Insufficient amount of memory available.
57 *
58 * %-EFAULT - Failure during execution of requested operation.
59 */
60static int nilfs_ioctl_wrap_copy(struct the_nilfs *nilfs,
61 struct nilfs_argv *argv, int dir,
62 ssize_t (*dofunc)(struct the_nilfs *,
63 __u64 *, int,
64 void *, size_t, size_t))
65{
66 void *buf;
67 void __user *base = (void __user *)(unsigned long)argv->v_base;
68 size_t maxmembs, total, n;
69 ssize_t nr;
70 int ret, i;
71 __u64 pos, ppos;
72
73 if (argv->v_nmembs == 0)
74 return 0;
75
76 if (argv->v_size > PAGE_SIZE)
77 return -EINVAL;
78
79 /*
80 * Reject pairs of a start item position (argv->v_index) and a
81 * total count (argv->v_nmembs) which leads position 'pos' to
82 * overflow by the increment at the end of the loop.
83 */
84 if (argv->v_index > ~(__u64)0 - argv->v_nmembs)
85 return -EINVAL;
86
87 buf = (void *)__get_free_pages(GFP_NOFS, 0);
88 if (unlikely(!buf))
89 return -ENOMEM;
90 maxmembs = PAGE_SIZE / argv->v_size;
91
92 ret = 0;
93 total = 0;
94 pos = argv->v_index;
95 for (i = 0; i < argv->v_nmembs; i += n) {
96 n = (argv->v_nmembs - i < maxmembs) ?
97 argv->v_nmembs - i : maxmembs;
98 if ((dir & _IOC_WRITE) &&
99 copy_from_user(buf, base + argv->v_size * i,
100 argv->v_size * n)) {
101 ret = -EFAULT;
102 break;
103 }
104 ppos = pos;
105 nr = dofunc(nilfs, &pos, argv->v_flags, buf, argv->v_size,
106 n);
107 if (nr < 0) {
108 ret = nr;
109 break;
110 }
111 if ((dir & _IOC_READ) &&
112 copy_to_user(base + argv->v_size * i, buf,
113 argv->v_size * nr)) {
114 ret = -EFAULT;
115 break;
116 }
117 total += nr;
118 if ((size_t)nr < n)
119 break;
120 if (pos == ppos)
121 pos += n;
122 }
123 argv->v_nmembs = total;
124
125 free_pages((unsigned long)buf, 0);
126 return ret;
127}
128
129/**
130 * nilfs_ioctl_getflags - ioctl to support lsattr
131 */
132static int nilfs_ioctl_getflags(struct inode *inode, void __user *argp)
133{
134 unsigned int flags = NILFS_I(inode)->i_flags & FS_FL_USER_VISIBLE;
135
136 return put_user(flags, (int __user *)argp);
137}
138
139/**
140 * nilfs_ioctl_setflags - ioctl to support chattr
141 */
142static int nilfs_ioctl_setflags(struct inode *inode, struct file *filp,
143 void __user *argp)
144{
145 struct nilfs_transaction_info ti;
146 unsigned int flags, oldflags;
147 int ret;
148
149 if (!inode_owner_or_capable(inode))
150 return -EACCES;
151
152 if (get_user(flags, (int __user *)argp))
153 return -EFAULT;
154
155 ret = mnt_want_write_file(filp);
156 if (ret)
157 return ret;
158
159 flags = nilfs_mask_flags(inode->i_mode, flags);
160
161 inode_lock(inode);
162
163 oldflags = NILFS_I(inode)->i_flags;
164
165 /*
166 * The IMMUTABLE and APPEND_ONLY flags can only be changed by the
167 * relevant capability.
168 */
169 ret = -EPERM;
170 if (((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) &&
171 !capable(CAP_LINUX_IMMUTABLE))
172 goto out;
173
174 ret = nilfs_transaction_begin(inode->i_sb, &ti, 0);
175 if (ret)
176 goto out;
177
178 NILFS_I(inode)->i_flags = (oldflags & ~FS_FL_USER_MODIFIABLE) |
179 (flags & FS_FL_USER_MODIFIABLE);
180
181 nilfs_set_inode_flags(inode);
182 inode->i_ctime = CURRENT_TIME;
183 if (IS_SYNC(inode))
184 nilfs_set_transaction_flag(NILFS_TI_SYNC);
185
186 nilfs_mark_inode_dirty(inode);
187 ret = nilfs_transaction_commit(inode->i_sb);
188out:
189 inode_unlock(inode);
190 mnt_drop_write_file(filp);
191 return ret;
192}
193
194/**
195 * nilfs_ioctl_getversion - get info about a file's version (generation number)
196 */
197static int nilfs_ioctl_getversion(struct inode *inode, void __user *argp)
198{
199 return put_user(inode->i_generation, (int __user *)argp);
200}
201
202/**
203 * nilfs_ioctl_change_cpmode - change checkpoint mode (checkpoint/snapshot)
204 * @inode: inode object
205 * @filp: file object
206 * @cmd: ioctl's request code
207 * @argp: pointer on argument from userspace
208 *
209 * Description: nilfs_ioctl_change_cpmode() function changes mode of
210 * given checkpoint between checkpoint and snapshot state. This ioctl
211 * is used in chcp and mkcp utilities.
212 *
213 * Return Value: On success, 0 is returned and mode of a checkpoint is
214 * changed. On error, one of the following negative error codes
215 * is returned.
216 *
217 * %-EPERM - Operation not permitted.
218 *
219 * %-EFAULT - Failure during checkpoint mode changing.
220 */
221static int nilfs_ioctl_change_cpmode(struct inode *inode, struct file *filp,
222 unsigned int cmd, void __user *argp)
223{
224 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
225 struct nilfs_transaction_info ti;
226 struct nilfs_cpmode cpmode;
227 int ret;
228
229 if (!capable(CAP_SYS_ADMIN))
230 return -EPERM;
231
232 ret = mnt_want_write_file(filp);
233 if (ret)
234 return ret;
235
236 ret = -EFAULT;
237 if (copy_from_user(&cpmode, argp, sizeof(cpmode)))
238 goto out;
239
240 mutex_lock(&nilfs->ns_snapshot_mount_mutex);
241
242 nilfs_transaction_begin(inode->i_sb, &ti, 0);
243 ret = nilfs_cpfile_change_cpmode(
244 nilfs->ns_cpfile, cpmode.cm_cno, cpmode.cm_mode);
245 if (unlikely(ret < 0))
246 nilfs_transaction_abort(inode->i_sb);
247 else
248 nilfs_transaction_commit(inode->i_sb); /* never fails */
249
250 mutex_unlock(&nilfs->ns_snapshot_mount_mutex);
251out:
252 mnt_drop_write_file(filp);
253 return ret;
254}
255
256/**
257 * nilfs_ioctl_delete_checkpoint - remove checkpoint
258 * @inode: inode object
259 * @filp: file object
260 * @cmd: ioctl's request code
261 * @argp: pointer on argument from userspace
262 *
263 * Description: nilfs_ioctl_delete_checkpoint() function removes
264 * checkpoint from NILFS2 file system. This ioctl is used in rmcp
265 * utility.
266 *
267 * Return Value: On success, 0 is returned and a checkpoint is
268 * removed. On error, one of the following negative error codes
269 * is returned.
270 *
271 * %-EPERM - Operation not permitted.
272 *
273 * %-EFAULT - Failure during checkpoint removing.
274 */
275static int
276nilfs_ioctl_delete_checkpoint(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_transaction_info ti;
281 __u64 cno;
282 int ret;
283
284 if (!capable(CAP_SYS_ADMIN))
285 return -EPERM;
286
287 ret = mnt_want_write_file(filp);
288 if (ret)
289 return ret;
290
291 ret = -EFAULT;
292 if (copy_from_user(&cno, argp, sizeof(cno)))
293 goto out;
294
295 nilfs_transaction_begin(inode->i_sb, &ti, 0);
296 ret = nilfs_cpfile_delete_checkpoint(nilfs->ns_cpfile, cno);
297 if (unlikely(ret < 0))
298 nilfs_transaction_abort(inode->i_sb);
299 else
300 nilfs_transaction_commit(inode->i_sb); /* never fails */
301out:
302 mnt_drop_write_file(filp);
303 return ret;
304}
305
306/**
307 * nilfs_ioctl_do_get_cpinfo - callback method getting info about checkpoints
308 * @nilfs: nilfs object
309 * @posp: pointer on array of checkpoint's numbers
310 * @flags: checkpoint mode (checkpoint or snapshot)
311 * @buf: buffer for storing checkponts' info
312 * @size: size in bytes of one checkpoint info item in array
313 * @nmembs: number of checkpoints in array (numbers and infos)
314 *
315 * Description: nilfs_ioctl_do_get_cpinfo() function returns info about
316 * requested checkpoints. The NILFS_IOCTL_GET_CPINFO ioctl is used in
317 * lscp utility and by nilfs_cleanerd daemon.
318 *
319 * Return value: count of nilfs_cpinfo structures in output buffer.
320 */
321static ssize_t
322nilfs_ioctl_do_get_cpinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
323 void *buf, size_t size, size_t nmembs)
324{
325 int ret;
326
327 down_read(&nilfs->ns_segctor_sem);
328 ret = nilfs_cpfile_get_cpinfo(nilfs->ns_cpfile, posp, flags, buf,
329 size, nmembs);
330 up_read(&nilfs->ns_segctor_sem);
331 return ret;
332}
333
334/**
335 * nilfs_ioctl_get_cpstat - get checkpoints statistics
336 * @inode: inode object
337 * @filp: file object
338 * @cmd: ioctl's request code
339 * @argp: pointer on argument from userspace
340 *
341 * Description: nilfs_ioctl_get_cpstat() returns information about checkpoints.
342 * The NILFS_IOCTL_GET_CPSTAT ioctl is used by lscp, rmcp utilities
343 * and by nilfs_cleanerd daemon.
344 *
345 * Return Value: On success, 0 is returned, and checkpoints information is
346 * copied into userspace pointer @argp. On error, one of the following
347 * negative error codes is returned.
348 *
349 * %-EIO - I/O error.
350 *
351 * %-ENOMEM - Insufficient amount of memory available.
352 *
353 * %-EFAULT - Failure during getting checkpoints statistics.
354 */
355static int nilfs_ioctl_get_cpstat(struct inode *inode, struct file *filp,
356 unsigned int cmd, void __user *argp)
357{
358 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
359 struct nilfs_cpstat cpstat;
360 int ret;
361
362 down_read(&nilfs->ns_segctor_sem);
363 ret = nilfs_cpfile_get_stat(nilfs->ns_cpfile, &cpstat);
364 up_read(&nilfs->ns_segctor_sem);
365 if (ret < 0)
366 return ret;
367
368 if (copy_to_user(argp, &cpstat, sizeof(cpstat)))
369 ret = -EFAULT;
370 return ret;
371}
372
373/**
374 * nilfs_ioctl_do_get_suinfo - callback method getting segment usage info
375 * @nilfs: nilfs object
376 * @posp: pointer on array of segment numbers
377 * @flags: *not used*
378 * @buf: buffer for storing suinfo array
379 * @size: size in bytes of one suinfo item in array
380 * @nmembs: count of segment numbers and suinfos in array
381 *
382 * Description: nilfs_ioctl_do_get_suinfo() function returns segment usage
383 * info about requested segments. The NILFS_IOCTL_GET_SUINFO ioctl is used
384 * in lssu, nilfs_resize utilities and by nilfs_cleanerd daemon.
385 *
386 * Return value: count of nilfs_suinfo structures in output buffer.
387 */
388static ssize_t
389nilfs_ioctl_do_get_suinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
390 void *buf, size_t size, size_t nmembs)
391{
392 int ret;
393
394 down_read(&nilfs->ns_segctor_sem);
395 ret = nilfs_sufile_get_suinfo(nilfs->ns_sufile, *posp, buf, size,
396 nmembs);
397 up_read(&nilfs->ns_segctor_sem);
398 return ret;
399}
400
401/**
402 * nilfs_ioctl_get_sustat - get segment usage statistics
403 * @inode: inode object
404 * @filp: file object
405 * @cmd: ioctl's request code
406 * @argp: pointer on argument from userspace
407 *
408 * Description: nilfs_ioctl_get_sustat() returns segment usage statistics.
409 * The NILFS_IOCTL_GET_SUSTAT ioctl is used in lssu, nilfs_resize utilities
410 * and by nilfs_cleanerd daemon.
411 *
412 * Return Value: On success, 0 is returned, and segment usage information is
413 * copied into userspace pointer @argp. On error, one of the following
414 * negative error codes is returned.
415 *
416 * %-EIO - I/O error.
417 *
418 * %-ENOMEM - Insufficient amount of memory available.
419 *
420 * %-EFAULT - Failure during getting segment usage statistics.
421 */
422static int nilfs_ioctl_get_sustat(struct inode *inode, struct file *filp,
423 unsigned int cmd, void __user *argp)
424{
425 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
426 struct nilfs_sustat sustat;
427 int ret;
428
429 down_read(&nilfs->ns_segctor_sem);
430 ret = nilfs_sufile_get_stat(nilfs->ns_sufile, &sustat);
431 up_read(&nilfs->ns_segctor_sem);
432 if (ret < 0)
433 return ret;
434
435 if (copy_to_user(argp, &sustat, sizeof(sustat)))
436 ret = -EFAULT;
437 return ret;
438}
439
440/**
441 * nilfs_ioctl_do_get_vinfo - callback method getting virtual blocks info
442 * @nilfs: nilfs object
443 * @posp: *not used*
444 * @flags: *not used*
445 * @buf: buffer for storing array of nilfs_vinfo structures
446 * @size: size in bytes of one vinfo item in array
447 * @nmembs: count of vinfos in array
448 *
449 * Description: nilfs_ioctl_do_get_vinfo() function returns information
450 * on virtual block addresses. The NILFS_IOCTL_GET_VINFO ioctl is used
451 * by nilfs_cleanerd daemon.
452 *
453 * Return value: count of nilfs_vinfo structures in output buffer.
454 */
455static ssize_t
456nilfs_ioctl_do_get_vinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
457 void *buf, size_t size, size_t nmembs)
458{
459 int ret;
460
461 down_read(&nilfs->ns_segctor_sem);
462 ret = nilfs_dat_get_vinfo(nilfs->ns_dat, buf, size, nmembs);
463 up_read(&nilfs->ns_segctor_sem);
464 return ret;
465}
466
467/**
468 * nilfs_ioctl_do_get_bdescs - callback method getting disk block descriptors
469 * @nilfs: nilfs object
470 * @posp: *not used*
471 * @flags: *not used*
472 * @buf: buffer for storing array of nilfs_bdesc structures
473 * @size: size in bytes of one bdesc item in array
474 * @nmembs: count of bdescs in array
475 *
476 * Description: nilfs_ioctl_do_get_bdescs() function returns information
477 * about descriptors of disk block numbers. The NILFS_IOCTL_GET_BDESCS ioctl
478 * is used by nilfs_cleanerd daemon.
479 *
480 * Return value: count of nilfs_bdescs structures in output buffer.
481 */
482static ssize_t
483nilfs_ioctl_do_get_bdescs(struct the_nilfs *nilfs, __u64 *posp, int flags,
484 void *buf, size_t size, size_t nmembs)
485{
486 struct nilfs_bmap *bmap = NILFS_I(nilfs->ns_dat)->i_bmap;
487 struct nilfs_bdesc *bdescs = buf;
488 int ret, i;
489
490 down_read(&nilfs->ns_segctor_sem);
491 for (i = 0; i < nmembs; i++) {
492 ret = nilfs_bmap_lookup_at_level(bmap,
493 bdescs[i].bd_offset,
494 bdescs[i].bd_level + 1,
495 &bdescs[i].bd_blocknr);
496 if (ret < 0) {
497 if (ret != -ENOENT) {
498 up_read(&nilfs->ns_segctor_sem);
499 return ret;
500 }
501 bdescs[i].bd_blocknr = 0;
502 }
503 }
504 up_read(&nilfs->ns_segctor_sem);
505 return nmembs;
506}
507
508/**
509 * nilfs_ioctl_get_bdescs - get disk block descriptors
510 * @inode: inode object
511 * @filp: file object
512 * @cmd: ioctl's request code
513 * @argp: pointer on argument from userspace
514 *
515 * Description: nilfs_ioctl_do_get_bdescs() function returns information
516 * about descriptors of disk block numbers. The NILFS_IOCTL_GET_BDESCS ioctl
517 * is used by nilfs_cleanerd daemon.
518 *
519 * Return Value: On success, 0 is returned, and disk block descriptors are
520 * copied into userspace pointer @argp. On error, one of the following
521 * negative error codes is returned.
522 *
523 * %-EINVAL - Invalid arguments from userspace.
524 *
525 * %-EIO - I/O error.
526 *
527 * %-ENOMEM - Insufficient amount of memory available.
528 *
529 * %-EFAULT - Failure during getting disk block descriptors.
530 */
531static int nilfs_ioctl_get_bdescs(struct inode *inode, struct file *filp,
532 unsigned int cmd, void __user *argp)
533{
534 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
535 struct nilfs_argv argv;
536 int ret;
537
538 if (copy_from_user(&argv, argp, sizeof(argv)))
539 return -EFAULT;
540
541 if (argv.v_size != sizeof(struct nilfs_bdesc))
542 return -EINVAL;
543
544 ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd),
545 nilfs_ioctl_do_get_bdescs);
546 if (ret < 0)
547 return ret;
548
549 if (copy_to_user(argp, &argv, sizeof(argv)))
550 ret = -EFAULT;
551 return ret;
552}
553
554/**
555 * nilfs_ioctl_move_inode_block - prepare data/node block for moving by GC
556 * @inode: inode object
557 * @vdesc: descriptor of virtual block number
558 * @buffers: list of moving buffers
559 *
560 * Description: nilfs_ioctl_move_inode_block() function registers data/node
561 * buffer in the GC pagecache and submit read request.
562 *
563 * Return Value: On success, 0 is returned. On error, one of the following
564 * negative error codes is returned.
565 *
566 * %-EIO - I/O error.
567 *
568 * %-ENOMEM - Insufficient amount of memory available.
569 *
570 * %-ENOENT - Requested block doesn't exist.
571 *
572 * %-EEXIST - Blocks conflict is detected.
573 */
574static int nilfs_ioctl_move_inode_block(struct inode *inode,
575 struct nilfs_vdesc *vdesc,
576 struct list_head *buffers)
577{
578 struct buffer_head *bh;
579 int ret;
580
581 if (vdesc->vd_flags == 0)
582 ret = nilfs_gccache_submit_read_data(
583 inode, vdesc->vd_offset, vdesc->vd_blocknr,
584 vdesc->vd_vblocknr, &bh);
585 else
586 ret = nilfs_gccache_submit_read_node(
587 inode, vdesc->vd_blocknr, vdesc->vd_vblocknr, &bh);
588
589 if (unlikely(ret < 0)) {
590 if (ret == -ENOENT)
591 printk(KERN_CRIT
592 "%s: invalid virtual block address (%s): "
593 "ino=%llu, cno=%llu, offset=%llu, "
594 "blocknr=%llu, vblocknr=%llu\n",
595 __func__, vdesc->vd_flags ? "node" : "data",
596 (unsigned long long)vdesc->vd_ino,
597 (unsigned long long)vdesc->vd_cno,
598 (unsigned long long)vdesc->vd_offset,
599 (unsigned long long)vdesc->vd_blocknr,
600 (unsigned long long)vdesc->vd_vblocknr);
601 return ret;
602 }
603 if (unlikely(!list_empty(&bh->b_assoc_buffers))) {
604 printk(KERN_CRIT "%s: conflicting %s buffer: ino=%llu, "
605 "cno=%llu, offset=%llu, blocknr=%llu, vblocknr=%llu\n",
606 __func__, vdesc->vd_flags ? "node" : "data",
607 (unsigned long long)vdesc->vd_ino,
608 (unsigned long long)vdesc->vd_cno,
609 (unsigned long long)vdesc->vd_offset,
610 (unsigned long long)vdesc->vd_blocknr,
611 (unsigned long long)vdesc->vd_vblocknr);
612 brelse(bh);
613 return -EEXIST;
614 }
615 list_add_tail(&bh->b_assoc_buffers, buffers);
616 return 0;
617}
618
619/**
620 * nilfs_ioctl_move_blocks - move valid inode's blocks during garbage collection
621 * @sb: superblock object
622 * @argv: vector of arguments from userspace
623 * @buf: array of nilfs_vdesc structures
624 *
625 * Description: nilfs_ioctl_move_blocks() function reads valid data/node
626 * blocks that garbage collector specified with the array of nilfs_vdesc
627 * structures and stores them into page caches of GC inodes.
628 *
629 * Return Value: Number of processed nilfs_vdesc structures or
630 * error code, otherwise.
631 */
632static int nilfs_ioctl_move_blocks(struct super_block *sb,
633 struct nilfs_argv *argv, void *buf)
634{
635 size_t nmembs = argv->v_nmembs;
636 struct the_nilfs *nilfs = sb->s_fs_info;
637 struct inode *inode;
638 struct nilfs_vdesc *vdesc;
639 struct buffer_head *bh, *n;
640 LIST_HEAD(buffers);
641 ino_t ino;
642 __u64 cno;
643 int i, ret;
644
645 for (i = 0, vdesc = buf; i < nmembs; ) {
646 ino = vdesc->vd_ino;
647 cno = vdesc->vd_cno;
648 inode = nilfs_iget_for_gc(sb, ino, cno);
649 if (IS_ERR(inode)) {
650 ret = PTR_ERR(inode);
651 goto failed;
652 }
653 if (list_empty(&NILFS_I(inode)->i_dirty)) {
654 /*
655 * Add the inode to GC inode list. Garbage Collection
656 * is serialized and no two processes manipulate the
657 * list simultaneously.
658 */
659 igrab(inode);
660 list_add(&NILFS_I(inode)->i_dirty,
661 &nilfs->ns_gc_inodes);
662 }
663
664 do {
665 ret = nilfs_ioctl_move_inode_block(inode, vdesc,
666 &buffers);
667 if (unlikely(ret < 0)) {
668 iput(inode);
669 goto failed;
670 }
671 vdesc++;
672 } while (++i < nmembs &&
673 vdesc->vd_ino == ino && vdesc->vd_cno == cno);
674
675 iput(inode); /* The inode still remains in GC inode list */
676 }
677
678 list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) {
679 ret = nilfs_gccache_wait_and_mark_dirty(bh);
680 if (unlikely(ret < 0)) {
681 WARN_ON(ret == -EEXIST);
682 goto failed;
683 }
684 list_del_init(&bh->b_assoc_buffers);
685 brelse(bh);
686 }
687 return nmembs;
688
689 failed:
690 list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) {
691 list_del_init(&bh->b_assoc_buffers);
692 brelse(bh);
693 }
694 return ret;
695}
696
697/**
698 * nilfs_ioctl_delete_checkpoints - delete checkpoints
699 * @nilfs: nilfs object
700 * @argv: vector of arguments from userspace
701 * @buf: array of periods of checkpoints numbers
702 *
703 * Description: nilfs_ioctl_delete_checkpoints() function deletes checkpoints
704 * in the period from p_start to p_end, excluding p_end itself. The checkpoints
705 * which have been already deleted are ignored.
706 *
707 * Return Value: Number of processed nilfs_period structures or
708 * error code, otherwise.
709 *
710 * %-EIO - I/O error.
711 *
712 * %-ENOMEM - Insufficient amount of memory available.
713 *
714 * %-EINVAL - invalid checkpoints.
715 */
716static int nilfs_ioctl_delete_checkpoints(struct the_nilfs *nilfs,
717 struct nilfs_argv *argv, void *buf)
718{
719 size_t nmembs = argv->v_nmembs;
720 struct inode *cpfile = nilfs->ns_cpfile;
721 struct nilfs_period *periods = buf;
722 int ret, i;
723
724 for (i = 0; i < nmembs; i++) {
725 ret = nilfs_cpfile_delete_checkpoints(
726 cpfile, periods[i].p_start, periods[i].p_end);
727 if (ret < 0)
728 return ret;
729 }
730 return nmembs;
731}
732
733/**
734 * nilfs_ioctl_free_vblocknrs - free virtual block numbers
735 * @nilfs: nilfs object
736 * @argv: vector of arguments from userspace
737 * @buf: array of virtual block numbers
738 *
739 * Description: nilfs_ioctl_free_vblocknrs() function frees
740 * the virtual block numbers specified by @buf and @argv->v_nmembs.
741 *
742 * Return Value: Number of processed virtual block numbers or
743 * error code, otherwise.
744 *
745 * %-EIO - I/O error.
746 *
747 * %-ENOMEM - Insufficient amount of memory available.
748 *
749 * %-ENOENT - The virtual block number have not been allocated.
750 */
751static int nilfs_ioctl_free_vblocknrs(struct the_nilfs *nilfs,
752 struct nilfs_argv *argv, void *buf)
753{
754 size_t nmembs = argv->v_nmembs;
755 int ret;
756
757 ret = nilfs_dat_freev(nilfs->ns_dat, buf, nmembs);
758
759 return (ret < 0) ? ret : nmembs;
760}
761
762/**
763 * nilfs_ioctl_mark_blocks_dirty - mark blocks dirty
764 * @nilfs: nilfs object
765 * @argv: vector of arguments from userspace
766 * @buf: array of block descriptors
767 *
768 * Description: nilfs_ioctl_mark_blocks_dirty() function marks
769 * metadata file or data blocks as dirty.
770 *
771 * Return Value: Number of processed block descriptors or
772 * error code, otherwise.
773 *
774 * %-ENOMEM - Insufficient memory available.
775 *
776 * %-EIO - I/O error
777 *
778 * %-ENOENT - the specified block does not exist (hole block)
779 */
780static int nilfs_ioctl_mark_blocks_dirty(struct the_nilfs *nilfs,
781 struct nilfs_argv *argv, void *buf)
782{
783 size_t nmembs = argv->v_nmembs;
784 struct nilfs_bmap *bmap = NILFS_I(nilfs->ns_dat)->i_bmap;
785 struct nilfs_bdesc *bdescs = buf;
786 int ret, i;
787
788 for (i = 0; i < nmembs; i++) {
789 /* XXX: use macro or inline func to check liveness */
790 ret = nilfs_bmap_lookup_at_level(bmap,
791 bdescs[i].bd_offset,
792 bdescs[i].bd_level + 1,
793 &bdescs[i].bd_blocknr);
794 if (ret < 0) {
795 if (ret != -ENOENT)
796 return ret;
797 bdescs[i].bd_blocknr = 0;
798 }
799 if (bdescs[i].bd_blocknr != bdescs[i].bd_oblocknr)
800 /* skip dead block */
801 continue;
802 if (bdescs[i].bd_level == 0) {
803 ret = nilfs_mdt_mark_block_dirty(nilfs->ns_dat,
804 bdescs[i].bd_offset);
805 if (ret < 0) {
806 WARN_ON(ret == -ENOENT);
807 return ret;
808 }
809 } else {
810 ret = nilfs_bmap_mark(bmap, bdescs[i].bd_offset,
811 bdescs[i].bd_level);
812 if (ret < 0) {
813 WARN_ON(ret == -ENOENT);
814 return ret;
815 }
816 }
817 }
818 return nmembs;
819}
820
821int nilfs_ioctl_prepare_clean_segments(struct the_nilfs *nilfs,
822 struct nilfs_argv *argv, void **kbufs)
823{
824 const char *msg;
825 int ret;
826
827 ret = nilfs_ioctl_delete_checkpoints(nilfs, &argv[1], kbufs[1]);
828 if (ret < 0) {
829 /*
830 * can safely abort because checkpoints can be removed
831 * independently.
832 */
833 msg = "cannot delete checkpoints";
834 goto failed;
835 }
836 ret = nilfs_ioctl_free_vblocknrs(nilfs, &argv[2], kbufs[2]);
837 if (ret < 0) {
838 /*
839 * can safely abort because DAT file is updated atomically
840 * using a copy-on-write technique.
841 */
842 msg = "cannot delete virtual blocks from DAT file";
843 goto failed;
844 }
845 ret = nilfs_ioctl_mark_blocks_dirty(nilfs, &argv[3], kbufs[3]);
846 if (ret < 0) {
847 /*
848 * can safely abort because the operation is nondestructive.
849 */
850 msg = "cannot mark copying blocks dirty";
851 goto failed;
852 }
853 return 0;
854
855 failed:
856 printk(KERN_ERR "NILFS: GC failed during preparation: %s: err=%d\n",
857 msg, ret);
858 return ret;
859}
860
861/**
862 * nilfs_ioctl_clean_segments - clean segments
863 * @inode: inode object
864 * @filp: file object
865 * @cmd: ioctl's request code
866 * @argp: pointer on argument from userspace
867 *
868 * Description: nilfs_ioctl_clean_segments() function makes garbage
869 * collection operation in the environment of requested parameters
870 * from userspace. The NILFS_IOCTL_CLEAN_SEGMENTS ioctl is used by
871 * nilfs_cleanerd daemon.
872 *
873 * Return Value: On success, 0 is returned or error code, otherwise.
874 */
875static int nilfs_ioctl_clean_segments(struct inode *inode, struct file *filp,
876 unsigned int cmd, void __user *argp)
877{
878 struct nilfs_argv argv[5];
879 static const size_t argsz[5] = {
880 sizeof(struct nilfs_vdesc),
881 sizeof(struct nilfs_period),
882 sizeof(__u64),
883 sizeof(struct nilfs_bdesc),
884 sizeof(__u64),
885 };
886 void __user *base;
887 void *kbufs[5];
888 struct the_nilfs *nilfs;
889 size_t len, nsegs;
890 int n, ret;
891
892 if (!capable(CAP_SYS_ADMIN))
893 return -EPERM;
894
895 ret = mnt_want_write_file(filp);
896 if (ret)
897 return ret;
898
899 ret = -EFAULT;
900 if (copy_from_user(argv, argp, sizeof(argv)))
901 goto out;
902
903 ret = -EINVAL;
904 nsegs = argv[4].v_nmembs;
905 if (argv[4].v_size != argsz[4])
906 goto out;
907 if (nsegs > UINT_MAX / sizeof(__u64))
908 goto out;
909
910 /*
911 * argv[4] points to segment numbers this ioctl cleans. We
912 * use kmalloc() for its buffer because memory used for the
913 * segment numbers is enough small.
914 */
915 kbufs[4] = memdup_user((void __user *)(unsigned long)argv[4].v_base,
916 nsegs * sizeof(__u64));
917 if (IS_ERR(kbufs[4])) {
918 ret = PTR_ERR(kbufs[4]);
919 goto out;
920 }
921 nilfs = inode->i_sb->s_fs_info;
922
923 for (n = 0; n < 4; n++) {
924 ret = -EINVAL;
925 if (argv[n].v_size != argsz[n])
926 goto out_free;
927
928 if (argv[n].v_nmembs > nsegs * nilfs->ns_blocks_per_segment)
929 goto out_free;
930
931 if (argv[n].v_nmembs >= UINT_MAX / argv[n].v_size)
932 goto out_free;
933
934 len = argv[n].v_size * argv[n].v_nmembs;
935 base = (void __user *)(unsigned long)argv[n].v_base;
936 if (len == 0) {
937 kbufs[n] = NULL;
938 continue;
939 }
940
941 kbufs[n] = vmalloc(len);
942 if (!kbufs[n]) {
943 ret = -ENOMEM;
944 goto out_free;
945 }
946 if (copy_from_user(kbufs[n], base, len)) {
947 ret = -EFAULT;
948 vfree(kbufs[n]);
949 goto out_free;
950 }
951 }
952
953 /*
954 * nilfs_ioctl_move_blocks() will call nilfs_iget_for_gc(),
955 * which will operates an inode list without blocking.
956 * To protect the list from concurrent operations,
957 * nilfs_ioctl_move_blocks should be atomic operation.
958 */
959 if (test_and_set_bit(THE_NILFS_GC_RUNNING, &nilfs->ns_flags)) {
960 ret = -EBUSY;
961 goto out_free;
962 }
963
964 ret = nilfs_ioctl_move_blocks(inode->i_sb, &argv[0], kbufs[0]);
965 if (ret < 0)
966 printk(KERN_ERR "NILFS: GC failed during preparation: "
967 "cannot read source blocks: err=%d\n", ret);
968 else {
969 if (nilfs_sb_need_update(nilfs))
970 set_nilfs_discontinued(nilfs);
971 ret = nilfs_clean_segments(inode->i_sb, argv, kbufs);
972 }
973
974 nilfs_remove_all_gcinodes(nilfs);
975 clear_nilfs_gc_running(nilfs);
976
977out_free:
978 while (--n >= 0)
979 vfree(kbufs[n]);
980 kfree(kbufs[4]);
981out:
982 mnt_drop_write_file(filp);
983 return ret;
984}
985
986/**
987 * nilfs_ioctl_sync - make a checkpoint
988 * @inode: inode object
989 * @filp: file object
990 * @cmd: ioctl's request code
991 * @argp: pointer on argument from userspace
992 *
993 * Description: nilfs_ioctl_sync() function constructs a logical segment
994 * for checkpointing. This function guarantees that all modified data
995 * and metadata are written out to the device when it successfully
996 * returned.
997 *
998 * Return Value: On success, 0 is retured. On errors, one of the following
999 * negative error code is returned.
1000 *
1001 * %-EROFS - Read only filesystem.
1002 *
1003 * %-EIO - I/O error
1004 *
1005 * %-ENOSPC - No space left on device (only in a panic state).
1006 *
1007 * %-ERESTARTSYS - Interrupted.
1008 *
1009 * %-ENOMEM - Insufficient memory available.
1010 *
1011 * %-EFAULT - Failure during execution of requested operation.
1012 */
1013static int nilfs_ioctl_sync(struct inode *inode, struct file *filp,
1014 unsigned int cmd, void __user *argp)
1015{
1016 __u64 cno;
1017 int ret;
1018 struct the_nilfs *nilfs;
1019
1020 ret = nilfs_construct_segment(inode->i_sb);
1021 if (ret < 0)
1022 return ret;
1023
1024 nilfs = inode->i_sb->s_fs_info;
1025 ret = nilfs_flush_device(nilfs);
1026 if (ret < 0)
1027 return ret;
1028
1029 if (argp != NULL) {
1030 down_read(&nilfs->ns_segctor_sem);
1031 cno = nilfs->ns_cno - 1;
1032 up_read(&nilfs->ns_segctor_sem);
1033 if (copy_to_user(argp, &cno, sizeof(cno)))
1034 return -EFAULT;
1035 }
1036 return 0;
1037}
1038
1039/**
1040 * nilfs_ioctl_resize - resize NILFS2 volume
1041 * @inode: inode object
1042 * @filp: file object
1043 * @argp: pointer on argument from userspace
1044 *
1045 * Return Value: On success, 0 is returned or error code, otherwise.
1046 */
1047static int nilfs_ioctl_resize(struct inode *inode, struct file *filp,
1048 void __user *argp)
1049{
1050 __u64 newsize;
1051 int ret = -EPERM;
1052
1053 if (!capable(CAP_SYS_ADMIN))
1054 goto out;
1055
1056 ret = mnt_want_write_file(filp);
1057 if (ret)
1058 goto out;
1059
1060 ret = -EFAULT;
1061 if (copy_from_user(&newsize, argp, sizeof(newsize)))
1062 goto out_drop_write;
1063
1064 ret = nilfs_resize_fs(inode->i_sb, newsize);
1065
1066out_drop_write:
1067 mnt_drop_write_file(filp);
1068out:
1069 return ret;
1070}
1071
1072/**
1073 * nilfs_ioctl_trim_fs() - trim ioctl handle function
1074 * @inode: inode object
1075 * @argp: pointer on argument from userspace
1076 *
1077 * Decription: nilfs_ioctl_trim_fs is the FITRIM ioctl handle function. It
1078 * checks the arguments from userspace and calls nilfs_sufile_trim_fs, which
1079 * performs the actual trim operation.
1080 *
1081 * Return Value: On success, 0 is returned or negative error code, otherwise.
1082 */
1083static int nilfs_ioctl_trim_fs(struct inode *inode, void __user *argp)
1084{
1085 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
1086 struct request_queue *q = bdev_get_queue(nilfs->ns_bdev);
1087 struct fstrim_range range;
1088 int ret;
1089
1090 if (!capable(CAP_SYS_ADMIN))
1091 return -EPERM;
1092
1093 if (!blk_queue_discard(q))
1094 return -EOPNOTSUPP;
1095
1096 if (copy_from_user(&range, argp, sizeof(range)))
1097 return -EFAULT;
1098
1099 range.minlen = max_t(u64, range.minlen, q->limits.discard_granularity);
1100
1101 down_read(&nilfs->ns_segctor_sem);
1102 ret = nilfs_sufile_trim_fs(nilfs->ns_sufile, &range);
1103 up_read(&nilfs->ns_segctor_sem);
1104
1105 if (ret < 0)
1106 return ret;
1107
1108 if (copy_to_user(argp, &range, sizeof(range)))
1109 return -EFAULT;
1110
1111 return 0;
1112}
1113
1114/**
1115 * nilfs_ioctl_set_alloc_range - limit range of segments to be allocated
1116 * @inode: inode object
1117 * @argp: pointer on argument from userspace
1118 *
1119 * Decription: nilfs_ioctl_set_alloc_range() function defines lower limit
1120 * of segments in bytes and upper limit of segments in bytes.
1121 * The NILFS_IOCTL_SET_ALLOC_RANGE is used by nilfs_resize utility.
1122 *
1123 * Return Value: On success, 0 is returned or error code, otherwise.
1124 */
1125static int nilfs_ioctl_set_alloc_range(struct inode *inode, void __user *argp)
1126{
1127 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
1128 __u64 range[2];
1129 __u64 minseg, maxseg;
1130 unsigned long segbytes;
1131 int ret = -EPERM;
1132
1133 if (!capable(CAP_SYS_ADMIN))
1134 goto out;
1135
1136 ret = -EFAULT;
1137 if (copy_from_user(range, argp, sizeof(__u64[2])))
1138 goto out;
1139
1140 ret = -ERANGE;
1141 if (range[1] > i_size_read(inode->i_sb->s_bdev->bd_inode))
1142 goto out;
1143
1144 segbytes = nilfs->ns_blocks_per_segment * nilfs->ns_blocksize;
1145
1146 minseg = range[0] + segbytes - 1;
1147 do_div(minseg, segbytes);
1148 maxseg = NILFS_SB2_OFFSET_BYTES(range[1]);
1149 do_div(maxseg, segbytes);
1150 maxseg--;
1151
1152 ret = nilfs_sufile_set_alloc_range(nilfs->ns_sufile, minseg, maxseg);
1153out:
1154 return ret;
1155}
1156
1157/**
1158 * nilfs_ioctl_get_info - wrapping function of get metadata info
1159 * @inode: inode object
1160 * @filp: file object
1161 * @cmd: ioctl's request code
1162 * @argp: pointer on argument from userspace
1163 * @membsz: size of an item in bytes
1164 * @dofunc: concrete function of getting metadata info
1165 *
1166 * Description: nilfs_ioctl_get_info() gets metadata info by means of
1167 * calling dofunc() function.
1168 *
1169 * Return Value: On success, 0 is returned and requested metadata info
1170 * is copied into userspace. On error, one of the following
1171 * negative error codes is returned.
1172 *
1173 * %-EINVAL - Invalid arguments from userspace.
1174 *
1175 * %-ENOMEM - Insufficient amount of memory available.
1176 *
1177 * %-EFAULT - Failure during execution of requested operation.
1178 */
1179static int nilfs_ioctl_get_info(struct inode *inode, struct file *filp,
1180 unsigned int cmd, void __user *argp,
1181 size_t membsz,
1182 ssize_t (*dofunc)(struct the_nilfs *,
1183 __u64 *, int,
1184 void *, size_t, size_t))
1185
1186{
1187 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
1188 struct nilfs_argv argv;
1189 int ret;
1190
1191 if (copy_from_user(&argv, argp, sizeof(argv)))
1192 return -EFAULT;
1193
1194 if (argv.v_size < membsz)
1195 return -EINVAL;
1196
1197 ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), dofunc);
1198 if (ret < 0)
1199 return ret;
1200
1201 if (copy_to_user(argp, &argv, sizeof(argv)))
1202 ret = -EFAULT;
1203 return ret;
1204}
1205
1206/**
1207 * nilfs_ioctl_set_suinfo - set segment usage info
1208 * @inode: inode object
1209 * @filp: file object
1210 * @cmd: ioctl's request code
1211 * @argp: pointer on argument from userspace
1212 *
1213 * Description: Expects an array of nilfs_suinfo_update structures
1214 * encapsulated in nilfs_argv and updates the segment usage info
1215 * according to the flags in nilfs_suinfo_update.
1216 *
1217 * Return Value: On success, 0 is returned. On error, one of the
1218 * following negative error codes is returned.
1219 *
1220 * %-EPERM - Not enough permissions
1221 *
1222 * %-EFAULT - Error copying input data
1223 *
1224 * %-EIO - I/O error.
1225 *
1226 * %-ENOMEM - Insufficient amount of memory available.
1227 *
1228 * %-EINVAL - Invalid values in input (segment number, flags or nblocks)
1229 */
1230static int nilfs_ioctl_set_suinfo(struct inode *inode, struct file *filp,
1231 unsigned int cmd, void __user *argp)
1232{
1233 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
1234 struct nilfs_transaction_info ti;
1235 struct nilfs_argv argv;
1236 size_t len;
1237 void __user *base;
1238 void *kbuf;
1239 int ret;
1240
1241 if (!capable(CAP_SYS_ADMIN))
1242 return -EPERM;
1243
1244 ret = mnt_want_write_file(filp);
1245 if (ret)
1246 return ret;
1247
1248 ret = -EFAULT;
1249 if (copy_from_user(&argv, argp, sizeof(argv)))
1250 goto out;
1251
1252 ret = -EINVAL;
1253 if (argv.v_size < sizeof(struct nilfs_suinfo_update))
1254 goto out;
1255
1256 if (argv.v_nmembs > nilfs->ns_nsegments)
1257 goto out;
1258
1259 if (argv.v_nmembs >= UINT_MAX / argv.v_size)
1260 goto out;
1261
1262 len = argv.v_size * argv.v_nmembs;
1263 if (!len) {
1264 ret = 0;
1265 goto out;
1266 }
1267
1268 base = (void __user *)(unsigned long)argv.v_base;
1269 kbuf = vmalloc(len);
1270 if (!kbuf) {
1271 ret = -ENOMEM;
1272 goto out;
1273 }
1274
1275 if (copy_from_user(kbuf, base, len)) {
1276 ret = -EFAULT;
1277 goto out_free;
1278 }
1279
1280 nilfs_transaction_begin(inode->i_sb, &ti, 0);
1281 ret = nilfs_sufile_set_suinfo(nilfs->ns_sufile, kbuf, argv.v_size,
1282 argv.v_nmembs);
1283 if (unlikely(ret < 0))
1284 nilfs_transaction_abort(inode->i_sb);
1285 else
1286 nilfs_transaction_commit(inode->i_sb); /* never fails */
1287
1288out_free:
1289 vfree(kbuf);
1290out:
1291 mnt_drop_write_file(filp);
1292 return ret;
1293}
1294
1295long nilfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1296{
1297 struct inode *inode = file_inode(filp);
1298 void __user *argp = (void __user *)arg;
1299
1300 switch (cmd) {
1301 case FS_IOC_GETFLAGS:
1302 return nilfs_ioctl_getflags(inode, argp);
1303 case FS_IOC_SETFLAGS:
1304 return nilfs_ioctl_setflags(inode, filp, argp);
1305 case FS_IOC_GETVERSION:
1306 return nilfs_ioctl_getversion(inode, argp);
1307 case NILFS_IOCTL_CHANGE_CPMODE:
1308 return nilfs_ioctl_change_cpmode(inode, filp, cmd, argp);
1309 case NILFS_IOCTL_DELETE_CHECKPOINT:
1310 return nilfs_ioctl_delete_checkpoint(inode, filp, cmd, argp);
1311 case NILFS_IOCTL_GET_CPINFO:
1312 return nilfs_ioctl_get_info(inode, filp, cmd, argp,
1313 sizeof(struct nilfs_cpinfo),
1314 nilfs_ioctl_do_get_cpinfo);
1315 case NILFS_IOCTL_GET_CPSTAT:
1316 return nilfs_ioctl_get_cpstat(inode, filp, cmd, argp);
1317 case NILFS_IOCTL_GET_SUINFO:
1318 return nilfs_ioctl_get_info(inode, filp, cmd, argp,
1319 sizeof(struct nilfs_suinfo),
1320 nilfs_ioctl_do_get_suinfo);
1321 case NILFS_IOCTL_SET_SUINFO:
1322 return nilfs_ioctl_set_suinfo(inode, filp, cmd, argp);
1323 case NILFS_IOCTL_GET_SUSTAT:
1324 return nilfs_ioctl_get_sustat(inode, filp, cmd, argp);
1325 case NILFS_IOCTL_GET_VINFO:
1326 return nilfs_ioctl_get_info(inode, filp, cmd, argp,
1327 sizeof(struct nilfs_vinfo),
1328 nilfs_ioctl_do_get_vinfo);
1329 case NILFS_IOCTL_GET_BDESCS:
1330 return nilfs_ioctl_get_bdescs(inode, filp, cmd, argp);
1331 case NILFS_IOCTL_CLEAN_SEGMENTS:
1332 return nilfs_ioctl_clean_segments(inode, filp, cmd, argp);
1333 case NILFS_IOCTL_SYNC:
1334 return nilfs_ioctl_sync(inode, filp, cmd, argp);
1335 case NILFS_IOCTL_RESIZE:
1336 return nilfs_ioctl_resize(inode, filp, argp);
1337 case NILFS_IOCTL_SET_ALLOC_RANGE:
1338 return nilfs_ioctl_set_alloc_range(inode, argp);
1339 case FITRIM:
1340 return nilfs_ioctl_trim_fs(inode, argp);
1341 default:
1342 return -ENOTTY;
1343 }
1344}
1345
1346#ifdef CONFIG_COMPAT
1347long nilfs_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1348{
1349 switch (cmd) {
1350 case FS_IOC32_GETFLAGS:
1351 cmd = FS_IOC_GETFLAGS;
1352 break;
1353 case FS_IOC32_SETFLAGS:
1354 cmd = FS_IOC_SETFLAGS;
1355 break;
1356 case FS_IOC32_GETVERSION:
1357 cmd = FS_IOC_GETVERSION;
1358 break;
1359 case NILFS_IOCTL_CHANGE_CPMODE:
1360 case NILFS_IOCTL_DELETE_CHECKPOINT:
1361 case NILFS_IOCTL_GET_CPINFO:
1362 case NILFS_IOCTL_GET_CPSTAT:
1363 case NILFS_IOCTL_GET_SUINFO:
1364 case NILFS_IOCTL_SET_SUINFO:
1365 case NILFS_IOCTL_GET_SUSTAT:
1366 case NILFS_IOCTL_GET_VINFO:
1367 case NILFS_IOCTL_GET_BDESCS:
1368 case NILFS_IOCTL_CLEAN_SEGMENTS:
1369 case NILFS_IOCTL_SYNC:
1370 case NILFS_IOCTL_RESIZE:
1371 case NILFS_IOCTL_SET_ALLOC_RANGE:
1372 break;
1373 default:
1374 return -ENOIOCTLCMD;
1375 }
1376 return nilfs_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
1377}
1378#endif