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1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * NILFS ioctl operations.
4 *
5 * Copyright (C) 2007, 2008 Nippon Telegraph and Telephone Corporation.
6 *
7 * Written by Koji Sato.
8 */
9
10#include <linux/fs.h>
11#include <linux/wait.h>
12#include <linux/slab.h>
13#include <linux/capability.h> /* capable() */
14#include <linux/uaccess.h> /* copy_from_user(), copy_to_user() */
15#include <linux/vmalloc.h>
16#include <linux/compat.h> /* compat_ptr() */
17#include <linux/mount.h> /* mnt_want_write_file(), mnt_drop_write_file() */
18#include <linux/buffer_head.h>
19#include <linux/fileattr.h>
20#include "nilfs.h"
21#include "segment.h"
22#include "bmap.h"
23#include "cpfile.h"
24#include "sufile.h"
25#include "dat.h"
26
27/**
28 * nilfs_ioctl_wrap_copy - wrapping function of get/set metadata info
29 * @nilfs: nilfs object
30 * @argv: vector of arguments from userspace
31 * @dir: set of direction flags
32 * @dofunc: concrete function of get/set metadata info
33 *
34 * Description: nilfs_ioctl_wrap_copy() gets/sets metadata info by means of
35 * calling dofunc() function on the basis of @argv argument.
36 *
37 * Return Value: On success, 0 is returned and requested metadata info
38 * is copied into userspace. On error, one of the following
39 * negative error codes is returned.
40 *
41 * %-EINVAL - Invalid arguments from userspace.
42 *
43 * %-ENOMEM - Insufficient amount of memory available.
44 *
45 * %-EFAULT - Failure during execution of requested operation.
46 */
47static int nilfs_ioctl_wrap_copy(struct the_nilfs *nilfs,
48 struct nilfs_argv *argv, int dir,
49 ssize_t (*dofunc)(struct the_nilfs *,
50 __u64 *, int,
51 void *, size_t, size_t))
52{
53 void *buf;
54 void __user *base = (void __user *)(unsigned long)argv->v_base;
55 size_t maxmembs, total, n;
56 ssize_t nr;
57 int ret, i;
58 __u64 pos, ppos;
59
60 if (argv->v_nmembs == 0)
61 return 0;
62
63 if (argv->v_size > PAGE_SIZE)
64 return -EINVAL;
65
66 /*
67 * Reject pairs of a start item position (argv->v_index) and a
68 * total count (argv->v_nmembs) which leads position 'pos' to
69 * overflow by the increment at the end of the loop.
70 */
71 if (argv->v_index > ~(__u64)0 - argv->v_nmembs)
72 return -EINVAL;
73
74 buf = (void *)__get_free_pages(GFP_NOFS, 0);
75 if (unlikely(!buf))
76 return -ENOMEM;
77 maxmembs = PAGE_SIZE / argv->v_size;
78
79 ret = 0;
80 total = 0;
81 pos = argv->v_index;
82 for (i = 0; i < argv->v_nmembs; i += n) {
83 n = (argv->v_nmembs - i < maxmembs) ?
84 argv->v_nmembs - i : maxmembs;
85 if ((dir & _IOC_WRITE) &&
86 copy_from_user(buf, base + argv->v_size * i,
87 argv->v_size * n)) {
88 ret = -EFAULT;
89 break;
90 }
91 ppos = pos;
92 nr = dofunc(nilfs, &pos, argv->v_flags, buf, argv->v_size,
93 n);
94 if (nr < 0) {
95 ret = nr;
96 break;
97 }
98 if ((dir & _IOC_READ) &&
99 copy_to_user(base + argv->v_size * i, buf,
100 argv->v_size * nr)) {
101 ret = -EFAULT;
102 break;
103 }
104 total += nr;
105 if ((size_t)nr < n)
106 break;
107 if (pos == ppos)
108 pos += n;
109 }
110 argv->v_nmembs = total;
111
112 free_pages((unsigned long)buf, 0);
113 return ret;
114}
115
116/**
117 * nilfs_fileattr_get - ioctl to support lsattr
118 */
119int nilfs_fileattr_get(struct dentry *dentry, struct fileattr *fa)
120{
121 struct inode *inode = d_inode(dentry);
122
123 fileattr_fill_flags(fa, NILFS_I(inode)->i_flags & FS_FL_USER_VISIBLE);
124
125 return 0;
126}
127
128/**
129 * nilfs_fileattr_set - ioctl to support chattr
130 */
131int nilfs_fileattr_set(struct user_namespace *mnt_userns,
132 struct dentry *dentry, struct fileattr *fa)
133{
134 struct inode *inode = d_inode(dentry);
135 struct nilfs_transaction_info ti;
136 unsigned int flags, oldflags;
137 int ret;
138
139 if (fileattr_has_fsx(fa))
140 return -EOPNOTSUPP;
141
142 flags = nilfs_mask_flags(inode->i_mode, fa->flags);
143
144 ret = nilfs_transaction_begin(inode->i_sb, &ti, 0);
145 if (ret)
146 return ret;
147
148 oldflags = NILFS_I(inode)->i_flags & ~FS_FL_USER_MODIFIABLE;
149 NILFS_I(inode)->i_flags = oldflags | (flags & FS_FL_USER_MODIFIABLE);
150
151 nilfs_set_inode_flags(inode);
152 inode->i_ctime = current_time(inode);
153 if (IS_SYNC(inode))
154 nilfs_set_transaction_flag(NILFS_TI_SYNC);
155
156 nilfs_mark_inode_dirty(inode);
157 return nilfs_transaction_commit(inode->i_sb);
158}
159
160/**
161 * nilfs_ioctl_getversion - get info about a file's version (generation number)
162 */
163static int nilfs_ioctl_getversion(struct inode *inode, void __user *argp)
164{
165 return put_user(inode->i_generation, (int __user *)argp);
166}
167
168/**
169 * nilfs_ioctl_change_cpmode - change checkpoint mode (checkpoint/snapshot)
170 * @inode: inode object
171 * @filp: file object
172 * @cmd: ioctl's request code
173 * @argp: pointer on argument from userspace
174 *
175 * Description: nilfs_ioctl_change_cpmode() function changes mode of
176 * given checkpoint between checkpoint and snapshot state. This ioctl
177 * is used in chcp and mkcp utilities.
178 *
179 * Return Value: On success, 0 is returned and mode of a checkpoint is
180 * changed. On error, one of the following negative error codes
181 * is returned.
182 *
183 * %-EPERM - Operation not permitted.
184 *
185 * %-EFAULT - Failure during checkpoint mode changing.
186 */
187static int nilfs_ioctl_change_cpmode(struct inode *inode, struct file *filp,
188 unsigned int cmd, void __user *argp)
189{
190 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
191 struct nilfs_transaction_info ti;
192 struct nilfs_cpmode cpmode;
193 int ret;
194
195 if (!capable(CAP_SYS_ADMIN))
196 return -EPERM;
197
198 ret = mnt_want_write_file(filp);
199 if (ret)
200 return ret;
201
202 ret = -EFAULT;
203 if (copy_from_user(&cpmode, argp, sizeof(cpmode)))
204 goto out;
205
206 mutex_lock(&nilfs->ns_snapshot_mount_mutex);
207
208 nilfs_transaction_begin(inode->i_sb, &ti, 0);
209 ret = nilfs_cpfile_change_cpmode(
210 nilfs->ns_cpfile, cpmode.cm_cno, cpmode.cm_mode);
211 if (unlikely(ret < 0))
212 nilfs_transaction_abort(inode->i_sb);
213 else
214 nilfs_transaction_commit(inode->i_sb); /* never fails */
215
216 mutex_unlock(&nilfs->ns_snapshot_mount_mutex);
217out:
218 mnt_drop_write_file(filp);
219 return ret;
220}
221
222/**
223 * nilfs_ioctl_delete_checkpoint - remove checkpoint
224 * @inode: inode object
225 * @filp: file object
226 * @cmd: ioctl's request code
227 * @argp: pointer on argument from userspace
228 *
229 * Description: nilfs_ioctl_delete_checkpoint() function removes
230 * checkpoint from NILFS2 file system. This ioctl is used in rmcp
231 * utility.
232 *
233 * Return Value: On success, 0 is returned and a checkpoint is
234 * removed. On error, one of the following negative error codes
235 * is returned.
236 *
237 * %-EPERM - Operation not permitted.
238 *
239 * %-EFAULT - Failure during checkpoint removing.
240 */
241static int
242nilfs_ioctl_delete_checkpoint(struct inode *inode, struct file *filp,
243 unsigned int cmd, void __user *argp)
244{
245 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
246 struct nilfs_transaction_info ti;
247 __u64 cno;
248 int ret;
249
250 if (!capable(CAP_SYS_ADMIN))
251 return -EPERM;
252
253 ret = mnt_want_write_file(filp);
254 if (ret)
255 return ret;
256
257 ret = -EFAULT;
258 if (copy_from_user(&cno, argp, sizeof(cno)))
259 goto out;
260
261 nilfs_transaction_begin(inode->i_sb, &ti, 0);
262 ret = nilfs_cpfile_delete_checkpoint(nilfs->ns_cpfile, cno);
263 if (unlikely(ret < 0))
264 nilfs_transaction_abort(inode->i_sb);
265 else
266 nilfs_transaction_commit(inode->i_sb); /* never fails */
267out:
268 mnt_drop_write_file(filp);
269 return ret;
270}
271
272/**
273 * nilfs_ioctl_do_get_cpinfo - callback method getting info about checkpoints
274 * @nilfs: nilfs object
275 * @posp: pointer on array of checkpoint's numbers
276 * @flags: checkpoint mode (checkpoint or snapshot)
277 * @buf: buffer for storing checkponts' info
278 * @size: size in bytes of one checkpoint info item in array
279 * @nmembs: number of checkpoints in array (numbers and infos)
280 *
281 * Description: nilfs_ioctl_do_get_cpinfo() function returns info about
282 * requested checkpoints. The NILFS_IOCTL_GET_CPINFO ioctl is used in
283 * lscp utility and by nilfs_cleanerd daemon.
284 *
285 * Return value: count of nilfs_cpinfo structures in output buffer.
286 */
287static ssize_t
288nilfs_ioctl_do_get_cpinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
289 void *buf, size_t size, size_t nmembs)
290{
291 int ret;
292
293 down_read(&nilfs->ns_segctor_sem);
294 ret = nilfs_cpfile_get_cpinfo(nilfs->ns_cpfile, posp, flags, buf,
295 size, nmembs);
296 up_read(&nilfs->ns_segctor_sem);
297 return ret;
298}
299
300/**
301 * nilfs_ioctl_get_cpstat - get checkpoints statistics
302 * @inode: inode object
303 * @filp: file object
304 * @cmd: ioctl's request code
305 * @argp: pointer on argument from userspace
306 *
307 * Description: nilfs_ioctl_get_cpstat() returns information about checkpoints.
308 * The NILFS_IOCTL_GET_CPSTAT ioctl is used by lscp, rmcp utilities
309 * and by nilfs_cleanerd daemon.
310 *
311 * Return Value: On success, 0 is returned, and checkpoints information is
312 * copied into userspace pointer @argp. On error, one of the following
313 * negative error codes is returned.
314 *
315 * %-EIO - I/O error.
316 *
317 * %-ENOMEM - Insufficient amount of memory available.
318 *
319 * %-EFAULT - Failure during getting checkpoints statistics.
320 */
321static int nilfs_ioctl_get_cpstat(struct inode *inode, struct file *filp,
322 unsigned int cmd, void __user *argp)
323{
324 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
325 struct nilfs_cpstat cpstat;
326 int ret;
327
328 down_read(&nilfs->ns_segctor_sem);
329 ret = nilfs_cpfile_get_stat(nilfs->ns_cpfile, &cpstat);
330 up_read(&nilfs->ns_segctor_sem);
331 if (ret < 0)
332 return ret;
333
334 if (copy_to_user(argp, &cpstat, sizeof(cpstat)))
335 ret = -EFAULT;
336 return ret;
337}
338
339/**
340 * nilfs_ioctl_do_get_suinfo - callback method getting segment usage info
341 * @nilfs: nilfs object
342 * @posp: pointer on array of segment numbers
343 * @flags: *not used*
344 * @buf: buffer for storing suinfo array
345 * @size: size in bytes of one suinfo item in array
346 * @nmembs: count of segment numbers and suinfos in array
347 *
348 * Description: nilfs_ioctl_do_get_suinfo() function returns segment usage
349 * info about requested segments. The NILFS_IOCTL_GET_SUINFO ioctl is used
350 * in lssu, nilfs_resize utilities and by nilfs_cleanerd daemon.
351 *
352 * Return value: count of nilfs_suinfo structures in output buffer.
353 */
354static ssize_t
355nilfs_ioctl_do_get_suinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
356 void *buf, size_t size, size_t nmembs)
357{
358 int ret;
359
360 down_read(&nilfs->ns_segctor_sem);
361 ret = nilfs_sufile_get_suinfo(nilfs->ns_sufile, *posp, buf, size,
362 nmembs);
363 up_read(&nilfs->ns_segctor_sem);
364 return ret;
365}
366
367/**
368 * nilfs_ioctl_get_sustat - get segment usage statistics
369 * @inode: inode object
370 * @filp: file object
371 * @cmd: ioctl's request code
372 * @argp: pointer on argument from userspace
373 *
374 * Description: nilfs_ioctl_get_sustat() returns segment usage statistics.
375 * The NILFS_IOCTL_GET_SUSTAT ioctl is used in lssu, nilfs_resize utilities
376 * and by nilfs_cleanerd daemon.
377 *
378 * Return Value: On success, 0 is returned, and segment usage information is
379 * copied into userspace pointer @argp. On error, one of the following
380 * negative error codes is returned.
381 *
382 * %-EIO - I/O error.
383 *
384 * %-ENOMEM - Insufficient amount of memory available.
385 *
386 * %-EFAULT - Failure during getting segment usage statistics.
387 */
388static int nilfs_ioctl_get_sustat(struct inode *inode, struct file *filp,
389 unsigned int cmd, void __user *argp)
390{
391 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
392 struct nilfs_sustat sustat;
393 int ret;
394
395 down_read(&nilfs->ns_segctor_sem);
396 ret = nilfs_sufile_get_stat(nilfs->ns_sufile, &sustat);
397 up_read(&nilfs->ns_segctor_sem);
398 if (ret < 0)
399 return ret;
400
401 if (copy_to_user(argp, &sustat, sizeof(sustat)))
402 ret = -EFAULT;
403 return ret;
404}
405
406/**
407 * nilfs_ioctl_do_get_vinfo - callback method getting virtual blocks info
408 * @nilfs: nilfs object
409 * @posp: *not used*
410 * @flags: *not used*
411 * @buf: buffer for storing array of nilfs_vinfo structures
412 * @size: size in bytes of one vinfo item in array
413 * @nmembs: count of vinfos in array
414 *
415 * Description: nilfs_ioctl_do_get_vinfo() function returns information
416 * on virtual block addresses. The NILFS_IOCTL_GET_VINFO ioctl is used
417 * by nilfs_cleanerd daemon.
418 *
419 * Return value: count of nilfs_vinfo structures in output buffer.
420 */
421static ssize_t
422nilfs_ioctl_do_get_vinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
423 void *buf, size_t size, size_t nmembs)
424{
425 int ret;
426
427 down_read(&nilfs->ns_segctor_sem);
428 ret = nilfs_dat_get_vinfo(nilfs->ns_dat, buf, size, nmembs);
429 up_read(&nilfs->ns_segctor_sem);
430 return ret;
431}
432
433/**
434 * nilfs_ioctl_do_get_bdescs - callback method getting disk block descriptors
435 * @nilfs: nilfs object
436 * @posp: *not used*
437 * @flags: *not used*
438 * @buf: buffer for storing array of nilfs_bdesc structures
439 * @size: size in bytes of one bdesc item in array
440 * @nmembs: count of bdescs in array
441 *
442 * Description: nilfs_ioctl_do_get_bdescs() function returns information
443 * about descriptors of disk block numbers. The NILFS_IOCTL_GET_BDESCS ioctl
444 * is used by nilfs_cleanerd daemon.
445 *
446 * Return value: count of nilfs_bdescs structures in output buffer.
447 */
448static ssize_t
449nilfs_ioctl_do_get_bdescs(struct the_nilfs *nilfs, __u64 *posp, int flags,
450 void *buf, size_t size, size_t nmembs)
451{
452 struct nilfs_bmap *bmap = NILFS_I(nilfs->ns_dat)->i_bmap;
453 struct nilfs_bdesc *bdescs = buf;
454 int ret, i;
455
456 down_read(&nilfs->ns_segctor_sem);
457 for (i = 0; i < nmembs; i++) {
458 ret = nilfs_bmap_lookup_at_level(bmap,
459 bdescs[i].bd_offset,
460 bdescs[i].bd_level + 1,
461 &bdescs[i].bd_blocknr);
462 if (ret < 0) {
463 if (ret != -ENOENT) {
464 up_read(&nilfs->ns_segctor_sem);
465 return ret;
466 }
467 bdescs[i].bd_blocknr = 0;
468 }
469 }
470 up_read(&nilfs->ns_segctor_sem);
471 return nmembs;
472}
473
474/**
475 * nilfs_ioctl_get_bdescs - get disk block descriptors
476 * @inode: inode object
477 * @filp: file object
478 * @cmd: ioctl's request code
479 * @argp: pointer on argument from userspace
480 *
481 * Description: nilfs_ioctl_do_get_bdescs() function returns information
482 * about descriptors of disk block numbers. The NILFS_IOCTL_GET_BDESCS ioctl
483 * is used by nilfs_cleanerd daemon.
484 *
485 * Return Value: On success, 0 is returned, and disk block descriptors are
486 * copied into userspace pointer @argp. On error, one of the following
487 * negative error codes is returned.
488 *
489 * %-EINVAL - Invalid arguments from userspace.
490 *
491 * %-EIO - I/O error.
492 *
493 * %-ENOMEM - Insufficient amount of memory available.
494 *
495 * %-EFAULT - Failure during getting disk block descriptors.
496 */
497static int nilfs_ioctl_get_bdescs(struct inode *inode, struct file *filp,
498 unsigned int cmd, void __user *argp)
499{
500 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
501 struct nilfs_argv argv;
502 int ret;
503
504 if (copy_from_user(&argv, argp, sizeof(argv)))
505 return -EFAULT;
506
507 if (argv.v_size != sizeof(struct nilfs_bdesc))
508 return -EINVAL;
509
510 ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd),
511 nilfs_ioctl_do_get_bdescs);
512 if (ret < 0)
513 return ret;
514
515 if (copy_to_user(argp, &argv, sizeof(argv)))
516 ret = -EFAULT;
517 return ret;
518}
519
520/**
521 * nilfs_ioctl_move_inode_block - prepare data/node block for moving by GC
522 * @inode: inode object
523 * @vdesc: descriptor of virtual block number
524 * @buffers: list of moving buffers
525 *
526 * Description: nilfs_ioctl_move_inode_block() function registers data/node
527 * buffer in the GC pagecache and submit read request.
528 *
529 * Return Value: On success, 0 is returned. On error, one of the following
530 * negative error codes is returned.
531 *
532 * %-EIO - I/O error.
533 *
534 * %-ENOMEM - Insufficient amount of memory available.
535 *
536 * %-ENOENT - Requested block doesn't exist.
537 *
538 * %-EEXIST - Blocks conflict is detected.
539 */
540static int nilfs_ioctl_move_inode_block(struct inode *inode,
541 struct nilfs_vdesc *vdesc,
542 struct list_head *buffers)
543{
544 struct buffer_head *bh;
545 int ret;
546
547 if (vdesc->vd_flags == 0)
548 ret = nilfs_gccache_submit_read_data(
549 inode, vdesc->vd_offset, vdesc->vd_blocknr,
550 vdesc->vd_vblocknr, &bh);
551 else
552 ret = nilfs_gccache_submit_read_node(
553 inode, vdesc->vd_blocknr, vdesc->vd_vblocknr, &bh);
554
555 if (unlikely(ret < 0)) {
556 if (ret == -ENOENT)
557 nilfs_crit(inode->i_sb,
558 "%s: invalid virtual block address (%s): ino=%llu, cno=%llu, offset=%llu, blocknr=%llu, vblocknr=%llu",
559 __func__, vdesc->vd_flags ? "node" : "data",
560 (unsigned long long)vdesc->vd_ino,
561 (unsigned long long)vdesc->vd_cno,
562 (unsigned long long)vdesc->vd_offset,
563 (unsigned long long)vdesc->vd_blocknr,
564 (unsigned long long)vdesc->vd_vblocknr);
565 return ret;
566 }
567 if (unlikely(!list_empty(&bh->b_assoc_buffers))) {
568 nilfs_crit(inode->i_sb,
569 "%s: conflicting %s buffer: ino=%llu, cno=%llu, offset=%llu, blocknr=%llu, vblocknr=%llu",
570 __func__, vdesc->vd_flags ? "node" : "data",
571 (unsigned long long)vdesc->vd_ino,
572 (unsigned long long)vdesc->vd_cno,
573 (unsigned long long)vdesc->vd_offset,
574 (unsigned long long)vdesc->vd_blocknr,
575 (unsigned long long)vdesc->vd_vblocknr);
576 brelse(bh);
577 return -EEXIST;
578 }
579 list_add_tail(&bh->b_assoc_buffers, buffers);
580 return 0;
581}
582
583/**
584 * nilfs_ioctl_move_blocks - move valid inode's blocks during garbage collection
585 * @sb: superblock object
586 * @argv: vector of arguments from userspace
587 * @buf: array of nilfs_vdesc structures
588 *
589 * Description: nilfs_ioctl_move_blocks() function reads valid data/node
590 * blocks that garbage collector specified with the array of nilfs_vdesc
591 * structures and stores them into page caches of GC inodes.
592 *
593 * Return Value: Number of processed nilfs_vdesc structures or
594 * error code, otherwise.
595 */
596static int nilfs_ioctl_move_blocks(struct super_block *sb,
597 struct nilfs_argv *argv, void *buf)
598{
599 size_t nmembs = argv->v_nmembs;
600 struct the_nilfs *nilfs = sb->s_fs_info;
601 struct inode *inode;
602 struct nilfs_vdesc *vdesc;
603 struct buffer_head *bh, *n;
604 LIST_HEAD(buffers);
605 ino_t ino;
606 __u64 cno;
607 int i, ret;
608
609 for (i = 0, vdesc = buf; i < nmembs; ) {
610 ino = vdesc->vd_ino;
611 cno = vdesc->vd_cno;
612 inode = nilfs_iget_for_gc(sb, ino, cno);
613 if (IS_ERR(inode)) {
614 ret = PTR_ERR(inode);
615 goto failed;
616 }
617 if (list_empty(&NILFS_I(inode)->i_dirty)) {
618 /*
619 * Add the inode to GC inode list. Garbage Collection
620 * is serialized and no two processes manipulate the
621 * list simultaneously.
622 */
623 igrab(inode);
624 list_add(&NILFS_I(inode)->i_dirty,
625 &nilfs->ns_gc_inodes);
626 }
627
628 do {
629 ret = nilfs_ioctl_move_inode_block(inode, vdesc,
630 &buffers);
631 if (unlikely(ret < 0)) {
632 iput(inode);
633 goto failed;
634 }
635 vdesc++;
636 } while (++i < nmembs &&
637 vdesc->vd_ino == ino && vdesc->vd_cno == cno);
638
639 iput(inode); /* The inode still remains in GC inode list */
640 }
641
642 list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) {
643 ret = nilfs_gccache_wait_and_mark_dirty(bh);
644 if (unlikely(ret < 0)) {
645 WARN_ON(ret == -EEXIST);
646 goto failed;
647 }
648 list_del_init(&bh->b_assoc_buffers);
649 brelse(bh);
650 }
651 return nmembs;
652
653 failed:
654 list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) {
655 list_del_init(&bh->b_assoc_buffers);
656 brelse(bh);
657 }
658 return ret;
659}
660
661/**
662 * nilfs_ioctl_delete_checkpoints - delete checkpoints
663 * @nilfs: nilfs object
664 * @argv: vector of arguments from userspace
665 * @buf: array of periods of checkpoints numbers
666 *
667 * Description: nilfs_ioctl_delete_checkpoints() function deletes checkpoints
668 * in the period from p_start to p_end, excluding p_end itself. The checkpoints
669 * which have been already deleted are ignored.
670 *
671 * Return Value: Number of processed nilfs_period structures or
672 * error code, otherwise.
673 *
674 * %-EIO - I/O error.
675 *
676 * %-ENOMEM - Insufficient amount of memory available.
677 *
678 * %-EINVAL - invalid checkpoints.
679 */
680static int nilfs_ioctl_delete_checkpoints(struct the_nilfs *nilfs,
681 struct nilfs_argv *argv, void *buf)
682{
683 size_t nmembs = argv->v_nmembs;
684 struct inode *cpfile = nilfs->ns_cpfile;
685 struct nilfs_period *periods = buf;
686 int ret, i;
687
688 for (i = 0; i < nmembs; i++) {
689 ret = nilfs_cpfile_delete_checkpoints(
690 cpfile, periods[i].p_start, periods[i].p_end);
691 if (ret < 0)
692 return ret;
693 }
694 return nmembs;
695}
696
697/**
698 * nilfs_ioctl_free_vblocknrs - free virtual block numbers
699 * @nilfs: nilfs object
700 * @argv: vector of arguments from userspace
701 * @buf: array of virtual block numbers
702 *
703 * Description: nilfs_ioctl_free_vblocknrs() function frees
704 * the virtual block numbers specified by @buf and @argv->v_nmembs.
705 *
706 * Return Value: Number of processed virtual block numbers or
707 * error code, otherwise.
708 *
709 * %-EIO - I/O error.
710 *
711 * %-ENOMEM - Insufficient amount of memory available.
712 *
713 * %-ENOENT - The virtual block number have not been allocated.
714 */
715static int nilfs_ioctl_free_vblocknrs(struct the_nilfs *nilfs,
716 struct nilfs_argv *argv, void *buf)
717{
718 size_t nmembs = argv->v_nmembs;
719 int ret;
720
721 ret = nilfs_dat_freev(nilfs->ns_dat, buf, nmembs);
722
723 return (ret < 0) ? ret : nmembs;
724}
725
726/**
727 * nilfs_ioctl_mark_blocks_dirty - mark blocks dirty
728 * @nilfs: nilfs object
729 * @argv: vector of arguments from userspace
730 * @buf: array of block descriptors
731 *
732 * Description: nilfs_ioctl_mark_blocks_dirty() function marks
733 * metadata file or data blocks as dirty.
734 *
735 * Return Value: Number of processed block descriptors or
736 * error code, otherwise.
737 *
738 * %-ENOMEM - Insufficient memory available.
739 *
740 * %-EIO - I/O error
741 *
742 * %-ENOENT - the specified block does not exist (hole block)
743 */
744static int nilfs_ioctl_mark_blocks_dirty(struct the_nilfs *nilfs,
745 struct nilfs_argv *argv, void *buf)
746{
747 size_t nmembs = argv->v_nmembs;
748 struct nilfs_bmap *bmap = NILFS_I(nilfs->ns_dat)->i_bmap;
749 struct nilfs_bdesc *bdescs = buf;
750 struct buffer_head *bh;
751 int ret, i;
752
753 for (i = 0; i < nmembs; i++) {
754 /* XXX: use macro or inline func to check liveness */
755 ret = nilfs_bmap_lookup_at_level(bmap,
756 bdescs[i].bd_offset,
757 bdescs[i].bd_level + 1,
758 &bdescs[i].bd_blocknr);
759 if (ret < 0) {
760 if (ret != -ENOENT)
761 return ret;
762 bdescs[i].bd_blocknr = 0;
763 }
764 if (bdescs[i].bd_blocknr != bdescs[i].bd_oblocknr)
765 /* skip dead block */
766 continue;
767 if (bdescs[i].bd_level == 0) {
768 ret = nilfs_mdt_get_block(nilfs->ns_dat,
769 bdescs[i].bd_offset,
770 false, NULL, &bh);
771 if (unlikely(ret)) {
772 WARN_ON(ret == -ENOENT);
773 return ret;
774 }
775 mark_buffer_dirty(bh);
776 nilfs_mdt_mark_dirty(nilfs->ns_dat);
777 put_bh(bh);
778 } else {
779 ret = nilfs_bmap_mark(bmap, bdescs[i].bd_offset,
780 bdescs[i].bd_level);
781 if (ret < 0) {
782 WARN_ON(ret == -ENOENT);
783 return ret;
784 }
785 }
786 }
787 return nmembs;
788}
789
790int nilfs_ioctl_prepare_clean_segments(struct the_nilfs *nilfs,
791 struct nilfs_argv *argv, void **kbufs)
792{
793 const char *msg;
794 int ret;
795
796 ret = nilfs_ioctl_delete_checkpoints(nilfs, &argv[1], kbufs[1]);
797 if (ret < 0) {
798 /*
799 * can safely abort because checkpoints can be removed
800 * independently.
801 */
802 msg = "cannot delete checkpoints";
803 goto failed;
804 }
805 ret = nilfs_ioctl_free_vblocknrs(nilfs, &argv[2], kbufs[2]);
806 if (ret < 0) {
807 /*
808 * can safely abort because DAT file is updated atomically
809 * using a copy-on-write technique.
810 */
811 msg = "cannot delete virtual blocks from DAT file";
812 goto failed;
813 }
814 ret = nilfs_ioctl_mark_blocks_dirty(nilfs, &argv[3], kbufs[3]);
815 if (ret < 0) {
816 /*
817 * can safely abort because the operation is nondestructive.
818 */
819 msg = "cannot mark copying blocks dirty";
820 goto failed;
821 }
822 return 0;
823
824 failed:
825 nilfs_err(nilfs->ns_sb, "error %d preparing GC: %s", ret, msg);
826 return ret;
827}
828
829/**
830 * nilfs_ioctl_clean_segments - clean segments
831 * @inode: inode object
832 * @filp: file object
833 * @cmd: ioctl's request code
834 * @argp: pointer on argument from userspace
835 *
836 * Description: nilfs_ioctl_clean_segments() function makes garbage
837 * collection operation in the environment of requested parameters
838 * from userspace. The NILFS_IOCTL_CLEAN_SEGMENTS ioctl is used by
839 * nilfs_cleanerd daemon.
840 *
841 * Return Value: On success, 0 is returned or error code, otherwise.
842 */
843static int nilfs_ioctl_clean_segments(struct inode *inode, struct file *filp,
844 unsigned int cmd, void __user *argp)
845{
846 struct nilfs_argv argv[5];
847 static const size_t argsz[5] = {
848 sizeof(struct nilfs_vdesc),
849 sizeof(struct nilfs_period),
850 sizeof(__u64),
851 sizeof(struct nilfs_bdesc),
852 sizeof(__u64),
853 };
854 void __user *base;
855 void *kbufs[5];
856 struct the_nilfs *nilfs;
857 size_t len, nsegs;
858 int n, ret;
859
860 if (!capable(CAP_SYS_ADMIN))
861 return -EPERM;
862
863 ret = mnt_want_write_file(filp);
864 if (ret)
865 return ret;
866
867 ret = -EFAULT;
868 if (copy_from_user(argv, argp, sizeof(argv)))
869 goto out;
870
871 ret = -EINVAL;
872 nsegs = argv[4].v_nmembs;
873 if (argv[4].v_size != argsz[4])
874 goto out;
875 if (nsegs > UINT_MAX / sizeof(__u64))
876 goto out;
877
878 /*
879 * argv[4] points to segment numbers this ioctl cleans. We
880 * use kmalloc() for its buffer because memory used for the
881 * segment numbers is enough small.
882 */
883 kbufs[4] = memdup_user((void __user *)(unsigned long)argv[4].v_base,
884 nsegs * sizeof(__u64));
885 if (IS_ERR(kbufs[4])) {
886 ret = PTR_ERR(kbufs[4]);
887 goto out;
888 }
889 nilfs = inode->i_sb->s_fs_info;
890
891 for (n = 0; n < 4; n++) {
892 ret = -EINVAL;
893 if (argv[n].v_size != argsz[n])
894 goto out_free;
895
896 if (argv[n].v_nmembs > nsegs * nilfs->ns_blocks_per_segment)
897 goto out_free;
898
899 if (argv[n].v_nmembs >= UINT_MAX / argv[n].v_size)
900 goto out_free;
901
902 len = argv[n].v_size * argv[n].v_nmembs;
903 base = (void __user *)(unsigned long)argv[n].v_base;
904 if (len == 0) {
905 kbufs[n] = NULL;
906 continue;
907 }
908
909 kbufs[n] = vmalloc(len);
910 if (!kbufs[n]) {
911 ret = -ENOMEM;
912 goto out_free;
913 }
914 if (copy_from_user(kbufs[n], base, len)) {
915 ret = -EFAULT;
916 vfree(kbufs[n]);
917 goto out_free;
918 }
919 }
920
921 /*
922 * nilfs_ioctl_move_blocks() will call nilfs_iget_for_gc(),
923 * which will operates an inode list without blocking.
924 * To protect the list from concurrent operations,
925 * nilfs_ioctl_move_blocks should be atomic operation.
926 */
927 if (test_and_set_bit(THE_NILFS_GC_RUNNING, &nilfs->ns_flags)) {
928 ret = -EBUSY;
929 goto out_free;
930 }
931
932 ret = nilfs_ioctl_move_blocks(inode->i_sb, &argv[0], kbufs[0]);
933 if (ret < 0) {
934 nilfs_err(inode->i_sb,
935 "error %d preparing GC: cannot read source blocks",
936 ret);
937 } else {
938 if (nilfs_sb_need_update(nilfs))
939 set_nilfs_discontinued(nilfs);
940 ret = nilfs_clean_segments(inode->i_sb, argv, kbufs);
941 }
942
943 nilfs_remove_all_gcinodes(nilfs);
944 clear_nilfs_gc_running(nilfs);
945
946out_free:
947 while (--n >= 0)
948 vfree(kbufs[n]);
949 kfree(kbufs[4]);
950out:
951 mnt_drop_write_file(filp);
952 return ret;
953}
954
955/**
956 * nilfs_ioctl_sync - make a checkpoint
957 * @inode: inode object
958 * @filp: file object
959 * @cmd: ioctl's request code
960 * @argp: pointer on argument from userspace
961 *
962 * Description: nilfs_ioctl_sync() function constructs a logical segment
963 * for checkpointing. This function guarantees that all modified data
964 * and metadata are written out to the device when it successfully
965 * returned.
966 *
967 * Return Value: On success, 0 is retured. On errors, one of the following
968 * negative error code is returned.
969 *
970 * %-EROFS - Read only filesystem.
971 *
972 * %-EIO - I/O error
973 *
974 * %-ENOSPC - No space left on device (only in a panic state).
975 *
976 * %-ERESTARTSYS - Interrupted.
977 *
978 * %-ENOMEM - Insufficient memory available.
979 *
980 * %-EFAULT - Failure during execution of requested operation.
981 */
982static int nilfs_ioctl_sync(struct inode *inode, struct file *filp,
983 unsigned int cmd, void __user *argp)
984{
985 __u64 cno;
986 int ret;
987 struct the_nilfs *nilfs;
988
989 ret = nilfs_construct_segment(inode->i_sb);
990 if (ret < 0)
991 return ret;
992
993 nilfs = inode->i_sb->s_fs_info;
994 ret = nilfs_flush_device(nilfs);
995 if (ret < 0)
996 return ret;
997
998 if (argp != NULL) {
999 down_read(&nilfs->ns_segctor_sem);
1000 cno = nilfs->ns_cno - 1;
1001 up_read(&nilfs->ns_segctor_sem);
1002 if (copy_to_user(argp, &cno, sizeof(cno)))
1003 return -EFAULT;
1004 }
1005 return 0;
1006}
1007
1008/**
1009 * nilfs_ioctl_resize - resize NILFS2 volume
1010 * @inode: inode object
1011 * @filp: file object
1012 * @argp: pointer on argument from userspace
1013 *
1014 * Return Value: On success, 0 is returned or error code, otherwise.
1015 */
1016static int nilfs_ioctl_resize(struct inode *inode, struct file *filp,
1017 void __user *argp)
1018{
1019 __u64 newsize;
1020 int ret = -EPERM;
1021
1022 if (!capable(CAP_SYS_ADMIN))
1023 goto out;
1024
1025 ret = mnt_want_write_file(filp);
1026 if (ret)
1027 goto out;
1028
1029 ret = -EFAULT;
1030 if (copy_from_user(&newsize, argp, sizeof(newsize)))
1031 goto out_drop_write;
1032
1033 ret = nilfs_resize_fs(inode->i_sb, newsize);
1034
1035out_drop_write:
1036 mnt_drop_write_file(filp);
1037out:
1038 return ret;
1039}
1040
1041/**
1042 * nilfs_ioctl_trim_fs() - trim ioctl handle function
1043 * @inode: inode object
1044 * @argp: pointer on argument from userspace
1045 *
1046 * Description: nilfs_ioctl_trim_fs is the FITRIM ioctl handle function. It
1047 * checks the arguments from userspace and calls nilfs_sufile_trim_fs, which
1048 * performs the actual trim operation.
1049 *
1050 * Return Value: On success, 0 is returned or negative error code, otherwise.
1051 */
1052static int nilfs_ioctl_trim_fs(struct inode *inode, void __user *argp)
1053{
1054 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
1055 struct fstrim_range range;
1056 int ret;
1057
1058 if (!capable(CAP_SYS_ADMIN))
1059 return -EPERM;
1060
1061 if (!bdev_max_discard_sectors(nilfs->ns_bdev))
1062 return -EOPNOTSUPP;
1063
1064 if (copy_from_user(&range, argp, sizeof(range)))
1065 return -EFAULT;
1066
1067 range.minlen = max_t(u64, range.minlen,
1068 bdev_discard_granularity(nilfs->ns_bdev));
1069
1070 down_read(&nilfs->ns_segctor_sem);
1071 ret = nilfs_sufile_trim_fs(nilfs->ns_sufile, &range);
1072 up_read(&nilfs->ns_segctor_sem);
1073
1074 if (ret < 0)
1075 return ret;
1076
1077 if (copy_to_user(argp, &range, sizeof(range)))
1078 return -EFAULT;
1079
1080 return 0;
1081}
1082
1083/**
1084 * nilfs_ioctl_set_alloc_range - limit range of segments to be allocated
1085 * @inode: inode object
1086 * @argp: pointer on argument from userspace
1087 *
1088 * Description: nilfs_ioctl_set_alloc_range() function defines lower limit
1089 * of segments in bytes and upper limit of segments in bytes.
1090 * The NILFS_IOCTL_SET_ALLOC_RANGE is used by nilfs_resize utility.
1091 *
1092 * Return Value: On success, 0 is returned or error code, otherwise.
1093 */
1094static int nilfs_ioctl_set_alloc_range(struct inode *inode, void __user *argp)
1095{
1096 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
1097 __u64 range[2];
1098 __u64 minseg, maxseg;
1099 unsigned long segbytes;
1100 int ret = -EPERM;
1101
1102 if (!capable(CAP_SYS_ADMIN))
1103 goto out;
1104
1105 ret = -EFAULT;
1106 if (copy_from_user(range, argp, sizeof(__u64[2])))
1107 goto out;
1108
1109 ret = -ERANGE;
1110 if (range[1] > bdev_nr_bytes(inode->i_sb->s_bdev))
1111 goto out;
1112
1113 segbytes = nilfs->ns_blocks_per_segment * nilfs->ns_blocksize;
1114
1115 minseg = range[0] + segbytes - 1;
1116 do_div(minseg, segbytes);
1117
1118 if (range[1] < 4096)
1119 goto out;
1120
1121 maxseg = NILFS_SB2_OFFSET_BYTES(range[1]);
1122 if (maxseg < segbytes)
1123 goto out;
1124
1125 do_div(maxseg, segbytes);
1126 maxseg--;
1127
1128 ret = nilfs_sufile_set_alloc_range(nilfs->ns_sufile, minseg, maxseg);
1129out:
1130 return ret;
1131}
1132
1133/**
1134 * nilfs_ioctl_get_info - wrapping function of get metadata info
1135 * @inode: inode object
1136 * @filp: file object
1137 * @cmd: ioctl's request code
1138 * @argp: pointer on argument from userspace
1139 * @membsz: size of an item in bytes
1140 * @dofunc: concrete function of getting metadata info
1141 *
1142 * Description: nilfs_ioctl_get_info() gets metadata info by means of
1143 * calling dofunc() function.
1144 *
1145 * Return Value: On success, 0 is returned and requested metadata info
1146 * is copied into userspace. On error, one of the following
1147 * negative error codes is returned.
1148 *
1149 * %-EINVAL - Invalid arguments from userspace.
1150 *
1151 * %-ENOMEM - Insufficient amount of memory available.
1152 *
1153 * %-EFAULT - Failure during execution of requested operation.
1154 */
1155static int nilfs_ioctl_get_info(struct inode *inode, struct file *filp,
1156 unsigned int cmd, void __user *argp,
1157 size_t membsz,
1158 ssize_t (*dofunc)(struct the_nilfs *,
1159 __u64 *, int,
1160 void *, size_t, size_t))
1161
1162{
1163 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
1164 struct nilfs_argv argv;
1165 int ret;
1166
1167 if (copy_from_user(&argv, argp, sizeof(argv)))
1168 return -EFAULT;
1169
1170 if (argv.v_size < membsz)
1171 return -EINVAL;
1172
1173 ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), dofunc);
1174 if (ret < 0)
1175 return ret;
1176
1177 if (copy_to_user(argp, &argv, sizeof(argv)))
1178 ret = -EFAULT;
1179 return ret;
1180}
1181
1182/**
1183 * nilfs_ioctl_set_suinfo - set segment usage info
1184 * @inode: inode object
1185 * @filp: file object
1186 * @cmd: ioctl's request code
1187 * @argp: pointer on argument from userspace
1188 *
1189 * Description: Expects an array of nilfs_suinfo_update structures
1190 * encapsulated in nilfs_argv and updates the segment usage info
1191 * according to the flags in nilfs_suinfo_update.
1192 *
1193 * Return Value: On success, 0 is returned. On error, one of the
1194 * following negative error codes is returned.
1195 *
1196 * %-EPERM - Not enough permissions
1197 *
1198 * %-EFAULT - Error copying input data
1199 *
1200 * %-EIO - I/O error.
1201 *
1202 * %-ENOMEM - Insufficient amount of memory available.
1203 *
1204 * %-EINVAL - Invalid values in input (segment number, flags or nblocks)
1205 */
1206static int nilfs_ioctl_set_suinfo(struct inode *inode, struct file *filp,
1207 unsigned int cmd, void __user *argp)
1208{
1209 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
1210 struct nilfs_transaction_info ti;
1211 struct nilfs_argv argv;
1212 size_t len;
1213 void __user *base;
1214 void *kbuf;
1215 int ret;
1216
1217 if (!capable(CAP_SYS_ADMIN))
1218 return -EPERM;
1219
1220 ret = mnt_want_write_file(filp);
1221 if (ret)
1222 return ret;
1223
1224 ret = -EFAULT;
1225 if (copy_from_user(&argv, argp, sizeof(argv)))
1226 goto out;
1227
1228 ret = -EINVAL;
1229 if (argv.v_size < sizeof(struct nilfs_suinfo_update))
1230 goto out;
1231
1232 if (argv.v_nmembs > nilfs->ns_nsegments)
1233 goto out;
1234
1235 if (argv.v_nmembs >= UINT_MAX / argv.v_size)
1236 goto out;
1237
1238 len = argv.v_size * argv.v_nmembs;
1239 if (!len) {
1240 ret = 0;
1241 goto out;
1242 }
1243
1244 base = (void __user *)(unsigned long)argv.v_base;
1245 kbuf = vmalloc(len);
1246 if (!kbuf) {
1247 ret = -ENOMEM;
1248 goto out;
1249 }
1250
1251 if (copy_from_user(kbuf, base, len)) {
1252 ret = -EFAULT;
1253 goto out_free;
1254 }
1255
1256 nilfs_transaction_begin(inode->i_sb, &ti, 0);
1257 ret = nilfs_sufile_set_suinfo(nilfs->ns_sufile, kbuf, argv.v_size,
1258 argv.v_nmembs);
1259 if (unlikely(ret < 0))
1260 nilfs_transaction_abort(inode->i_sb);
1261 else
1262 nilfs_transaction_commit(inode->i_sb); /* never fails */
1263
1264out_free:
1265 vfree(kbuf);
1266out:
1267 mnt_drop_write_file(filp);
1268 return ret;
1269}
1270
1271long nilfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1272{
1273 struct inode *inode = file_inode(filp);
1274 void __user *argp = (void __user *)arg;
1275
1276 switch (cmd) {
1277 case FS_IOC_GETVERSION:
1278 return nilfs_ioctl_getversion(inode, argp);
1279 case NILFS_IOCTL_CHANGE_CPMODE:
1280 return nilfs_ioctl_change_cpmode(inode, filp, cmd, argp);
1281 case NILFS_IOCTL_DELETE_CHECKPOINT:
1282 return nilfs_ioctl_delete_checkpoint(inode, filp, cmd, argp);
1283 case NILFS_IOCTL_GET_CPINFO:
1284 return nilfs_ioctl_get_info(inode, filp, cmd, argp,
1285 sizeof(struct nilfs_cpinfo),
1286 nilfs_ioctl_do_get_cpinfo);
1287 case NILFS_IOCTL_GET_CPSTAT:
1288 return nilfs_ioctl_get_cpstat(inode, filp, cmd, argp);
1289 case NILFS_IOCTL_GET_SUINFO:
1290 return nilfs_ioctl_get_info(inode, filp, cmd, argp,
1291 sizeof(struct nilfs_suinfo),
1292 nilfs_ioctl_do_get_suinfo);
1293 case NILFS_IOCTL_SET_SUINFO:
1294 return nilfs_ioctl_set_suinfo(inode, filp, cmd, argp);
1295 case NILFS_IOCTL_GET_SUSTAT:
1296 return nilfs_ioctl_get_sustat(inode, filp, cmd, argp);
1297 case NILFS_IOCTL_GET_VINFO:
1298 return nilfs_ioctl_get_info(inode, filp, cmd, argp,
1299 sizeof(struct nilfs_vinfo),
1300 nilfs_ioctl_do_get_vinfo);
1301 case NILFS_IOCTL_GET_BDESCS:
1302 return nilfs_ioctl_get_bdescs(inode, filp, cmd, argp);
1303 case NILFS_IOCTL_CLEAN_SEGMENTS:
1304 return nilfs_ioctl_clean_segments(inode, filp, cmd, argp);
1305 case NILFS_IOCTL_SYNC:
1306 return nilfs_ioctl_sync(inode, filp, cmd, argp);
1307 case NILFS_IOCTL_RESIZE:
1308 return nilfs_ioctl_resize(inode, filp, argp);
1309 case NILFS_IOCTL_SET_ALLOC_RANGE:
1310 return nilfs_ioctl_set_alloc_range(inode, argp);
1311 case FITRIM:
1312 return nilfs_ioctl_trim_fs(inode, argp);
1313 default:
1314 return -ENOTTY;
1315 }
1316}
1317
1318#ifdef CONFIG_COMPAT
1319long nilfs_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1320{
1321 switch (cmd) {
1322 case FS_IOC32_GETVERSION:
1323 cmd = FS_IOC_GETVERSION;
1324 break;
1325 case NILFS_IOCTL_CHANGE_CPMODE:
1326 case NILFS_IOCTL_DELETE_CHECKPOINT:
1327 case NILFS_IOCTL_GET_CPINFO:
1328 case NILFS_IOCTL_GET_CPSTAT:
1329 case NILFS_IOCTL_GET_SUINFO:
1330 case NILFS_IOCTL_SET_SUINFO:
1331 case NILFS_IOCTL_GET_SUSTAT:
1332 case NILFS_IOCTL_GET_VINFO:
1333 case NILFS_IOCTL_GET_BDESCS:
1334 case NILFS_IOCTL_CLEAN_SEGMENTS:
1335 case NILFS_IOCTL_SYNC:
1336 case NILFS_IOCTL_RESIZE:
1337 case NILFS_IOCTL_SET_ALLOC_RANGE:
1338 case FITRIM:
1339 break;
1340 default:
1341 return -ENOIOCTLCMD;
1342 }
1343 return nilfs_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
1344}
1345#endif
1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * ioctl.c - NILFS ioctl operations.
4 *
5 * Copyright (C) 2007, 2008 Nippon Telegraph and Telephone Corporation.
6 *
7 * Written by Koji Sato.
8 */
9
10#include <linux/fs.h>
11#include <linux/wait.h>
12#include <linux/slab.h>
13#include <linux/capability.h> /* capable() */
14#include <linux/uaccess.h> /* copy_from_user(), copy_to_user() */
15#include <linux/vmalloc.h>
16#include <linux/compat.h> /* compat_ptr() */
17#include <linux/mount.h> /* mnt_want_write_file(), mnt_drop_write_file() */
18#include <linux/buffer_head.h>
19#include "nilfs.h"
20#include "segment.h"
21#include "bmap.h"
22#include "cpfile.h"
23#include "sufile.h"
24#include "dat.h"
25
26/**
27 * nilfs_ioctl_wrap_copy - wrapping function of get/set metadata info
28 * @nilfs: nilfs object
29 * @argv: vector of arguments from userspace
30 * @dir: set of direction flags
31 * @dofunc: concrete function of get/set metadata info
32 *
33 * Description: nilfs_ioctl_wrap_copy() gets/sets metadata info by means of
34 * calling dofunc() function on the basis of @argv argument.
35 *
36 * Return Value: On success, 0 is returned and requested metadata info
37 * is copied into userspace. On error, one of the following
38 * negative error codes is returned.
39 *
40 * %-EINVAL - Invalid arguments from userspace.
41 *
42 * %-ENOMEM - Insufficient amount of memory available.
43 *
44 * %-EFAULT - Failure during execution of requested operation.
45 */
46static int nilfs_ioctl_wrap_copy(struct the_nilfs *nilfs,
47 struct nilfs_argv *argv, int dir,
48 ssize_t (*dofunc)(struct the_nilfs *,
49 __u64 *, int,
50 void *, size_t, size_t))
51{
52 void *buf;
53 void __user *base = (void __user *)(unsigned long)argv->v_base;
54 size_t maxmembs, total, n;
55 ssize_t nr;
56 int ret, i;
57 __u64 pos, ppos;
58
59 if (argv->v_nmembs == 0)
60 return 0;
61
62 if (argv->v_size > PAGE_SIZE)
63 return -EINVAL;
64
65 /*
66 * Reject pairs of a start item position (argv->v_index) and a
67 * total count (argv->v_nmembs) which leads position 'pos' to
68 * overflow by the increment at the end of the loop.
69 */
70 if (argv->v_index > ~(__u64)0 - argv->v_nmembs)
71 return -EINVAL;
72
73 buf = (void *)__get_free_pages(GFP_NOFS, 0);
74 if (unlikely(!buf))
75 return -ENOMEM;
76 maxmembs = PAGE_SIZE / argv->v_size;
77
78 ret = 0;
79 total = 0;
80 pos = argv->v_index;
81 for (i = 0; i < argv->v_nmembs; i += n) {
82 n = (argv->v_nmembs - i < maxmembs) ?
83 argv->v_nmembs - i : maxmembs;
84 if ((dir & _IOC_WRITE) &&
85 copy_from_user(buf, base + argv->v_size * i,
86 argv->v_size * n)) {
87 ret = -EFAULT;
88 break;
89 }
90 ppos = pos;
91 nr = dofunc(nilfs, &pos, argv->v_flags, buf, argv->v_size,
92 n);
93 if (nr < 0) {
94 ret = nr;
95 break;
96 }
97 if ((dir & _IOC_READ) &&
98 copy_to_user(base + argv->v_size * i, buf,
99 argv->v_size * nr)) {
100 ret = -EFAULT;
101 break;
102 }
103 total += nr;
104 if ((size_t)nr < n)
105 break;
106 if (pos == ppos)
107 pos += n;
108 }
109 argv->v_nmembs = total;
110
111 free_pages((unsigned long)buf, 0);
112 return ret;
113}
114
115/**
116 * nilfs_ioctl_getflags - ioctl to support lsattr
117 */
118static int nilfs_ioctl_getflags(struct inode *inode, void __user *argp)
119{
120 unsigned int flags = NILFS_I(inode)->i_flags & FS_FL_USER_VISIBLE;
121
122 return put_user(flags, (int __user *)argp);
123}
124
125/**
126 * nilfs_ioctl_setflags - ioctl to support chattr
127 */
128static int nilfs_ioctl_setflags(struct inode *inode, struct file *filp,
129 void __user *argp)
130{
131 struct nilfs_transaction_info ti;
132 unsigned int flags, oldflags;
133 int ret;
134
135 if (!inode_owner_or_capable(inode))
136 return -EACCES;
137
138 if (get_user(flags, (int __user *)argp))
139 return -EFAULT;
140
141 ret = mnt_want_write_file(filp);
142 if (ret)
143 return ret;
144
145 flags = nilfs_mask_flags(inode->i_mode, flags);
146
147 inode_lock(inode);
148
149 oldflags = NILFS_I(inode)->i_flags;
150
151 ret = vfs_ioc_setflags_prepare(inode, oldflags, flags);
152 if (ret)
153 goto out;
154
155 ret = nilfs_transaction_begin(inode->i_sb, &ti, 0);
156 if (ret)
157 goto out;
158
159 NILFS_I(inode)->i_flags = (oldflags & ~FS_FL_USER_MODIFIABLE) |
160 (flags & FS_FL_USER_MODIFIABLE);
161
162 nilfs_set_inode_flags(inode);
163 inode->i_ctime = current_time(inode);
164 if (IS_SYNC(inode))
165 nilfs_set_transaction_flag(NILFS_TI_SYNC);
166
167 nilfs_mark_inode_dirty(inode);
168 ret = nilfs_transaction_commit(inode->i_sb);
169out:
170 inode_unlock(inode);
171 mnt_drop_write_file(filp);
172 return ret;
173}
174
175/**
176 * nilfs_ioctl_getversion - get info about a file's version (generation number)
177 */
178static int nilfs_ioctl_getversion(struct inode *inode, void __user *argp)
179{
180 return put_user(inode->i_generation, (int __user *)argp);
181}
182
183/**
184 * nilfs_ioctl_change_cpmode - change checkpoint mode (checkpoint/snapshot)
185 * @inode: inode object
186 * @filp: file object
187 * @cmd: ioctl's request code
188 * @argp: pointer on argument from userspace
189 *
190 * Description: nilfs_ioctl_change_cpmode() function changes mode of
191 * given checkpoint between checkpoint and snapshot state. This ioctl
192 * is used in chcp and mkcp utilities.
193 *
194 * Return Value: On success, 0 is returned and mode of a checkpoint is
195 * changed. On error, one of the following negative error codes
196 * is returned.
197 *
198 * %-EPERM - Operation not permitted.
199 *
200 * %-EFAULT - Failure during checkpoint mode changing.
201 */
202static int nilfs_ioctl_change_cpmode(struct inode *inode, struct file *filp,
203 unsigned int cmd, void __user *argp)
204{
205 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
206 struct nilfs_transaction_info ti;
207 struct nilfs_cpmode cpmode;
208 int ret;
209
210 if (!capable(CAP_SYS_ADMIN))
211 return -EPERM;
212
213 ret = mnt_want_write_file(filp);
214 if (ret)
215 return ret;
216
217 ret = -EFAULT;
218 if (copy_from_user(&cpmode, argp, sizeof(cpmode)))
219 goto out;
220
221 mutex_lock(&nilfs->ns_snapshot_mount_mutex);
222
223 nilfs_transaction_begin(inode->i_sb, &ti, 0);
224 ret = nilfs_cpfile_change_cpmode(
225 nilfs->ns_cpfile, cpmode.cm_cno, cpmode.cm_mode);
226 if (unlikely(ret < 0))
227 nilfs_transaction_abort(inode->i_sb);
228 else
229 nilfs_transaction_commit(inode->i_sb); /* never fails */
230
231 mutex_unlock(&nilfs->ns_snapshot_mount_mutex);
232out:
233 mnt_drop_write_file(filp);
234 return ret;
235}
236
237/**
238 * nilfs_ioctl_delete_checkpoint - remove checkpoint
239 * @inode: inode object
240 * @filp: file object
241 * @cmd: ioctl's request code
242 * @argp: pointer on argument from userspace
243 *
244 * Description: nilfs_ioctl_delete_checkpoint() function removes
245 * checkpoint from NILFS2 file system. This ioctl is used in rmcp
246 * utility.
247 *
248 * Return Value: On success, 0 is returned and a checkpoint is
249 * removed. On error, one of the following negative error codes
250 * is returned.
251 *
252 * %-EPERM - Operation not permitted.
253 *
254 * %-EFAULT - Failure during checkpoint removing.
255 */
256static int
257nilfs_ioctl_delete_checkpoint(struct inode *inode, struct file *filp,
258 unsigned int cmd, void __user *argp)
259{
260 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
261 struct nilfs_transaction_info ti;
262 __u64 cno;
263 int ret;
264
265 if (!capable(CAP_SYS_ADMIN))
266 return -EPERM;
267
268 ret = mnt_want_write_file(filp);
269 if (ret)
270 return ret;
271
272 ret = -EFAULT;
273 if (copy_from_user(&cno, argp, sizeof(cno)))
274 goto out;
275
276 nilfs_transaction_begin(inode->i_sb, &ti, 0);
277 ret = nilfs_cpfile_delete_checkpoint(nilfs->ns_cpfile, cno);
278 if (unlikely(ret < 0))
279 nilfs_transaction_abort(inode->i_sb);
280 else
281 nilfs_transaction_commit(inode->i_sb); /* never fails */
282out:
283 mnt_drop_write_file(filp);
284 return ret;
285}
286
287/**
288 * nilfs_ioctl_do_get_cpinfo - callback method getting info about checkpoints
289 * @nilfs: nilfs object
290 * @posp: pointer on array of checkpoint's numbers
291 * @flags: checkpoint mode (checkpoint or snapshot)
292 * @buf: buffer for storing checkponts' info
293 * @size: size in bytes of one checkpoint info item in array
294 * @nmembs: number of checkpoints in array (numbers and infos)
295 *
296 * Description: nilfs_ioctl_do_get_cpinfo() function returns info about
297 * requested checkpoints. The NILFS_IOCTL_GET_CPINFO ioctl is used in
298 * lscp utility and by nilfs_cleanerd daemon.
299 *
300 * Return value: count of nilfs_cpinfo structures in output buffer.
301 */
302static ssize_t
303nilfs_ioctl_do_get_cpinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
304 void *buf, size_t size, size_t nmembs)
305{
306 int ret;
307
308 down_read(&nilfs->ns_segctor_sem);
309 ret = nilfs_cpfile_get_cpinfo(nilfs->ns_cpfile, posp, flags, buf,
310 size, nmembs);
311 up_read(&nilfs->ns_segctor_sem);
312 return ret;
313}
314
315/**
316 * nilfs_ioctl_get_cpstat - get checkpoints statistics
317 * @inode: inode object
318 * @filp: file object
319 * @cmd: ioctl's request code
320 * @argp: pointer on argument from userspace
321 *
322 * Description: nilfs_ioctl_get_cpstat() returns information about checkpoints.
323 * The NILFS_IOCTL_GET_CPSTAT ioctl is used by lscp, rmcp utilities
324 * and by nilfs_cleanerd daemon.
325 *
326 * Return Value: On success, 0 is returned, and checkpoints information is
327 * copied into userspace pointer @argp. On error, one of the following
328 * negative error codes is returned.
329 *
330 * %-EIO - I/O error.
331 *
332 * %-ENOMEM - Insufficient amount of memory available.
333 *
334 * %-EFAULT - Failure during getting checkpoints statistics.
335 */
336static int nilfs_ioctl_get_cpstat(struct inode *inode, struct file *filp,
337 unsigned int cmd, void __user *argp)
338{
339 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
340 struct nilfs_cpstat cpstat;
341 int ret;
342
343 down_read(&nilfs->ns_segctor_sem);
344 ret = nilfs_cpfile_get_stat(nilfs->ns_cpfile, &cpstat);
345 up_read(&nilfs->ns_segctor_sem);
346 if (ret < 0)
347 return ret;
348
349 if (copy_to_user(argp, &cpstat, sizeof(cpstat)))
350 ret = -EFAULT;
351 return ret;
352}
353
354/**
355 * nilfs_ioctl_do_get_suinfo - callback method getting segment usage info
356 * @nilfs: nilfs object
357 * @posp: pointer on array of segment numbers
358 * @flags: *not used*
359 * @buf: buffer for storing suinfo array
360 * @size: size in bytes of one suinfo item in array
361 * @nmembs: count of segment numbers and suinfos in array
362 *
363 * Description: nilfs_ioctl_do_get_suinfo() function returns segment usage
364 * info about requested segments. The NILFS_IOCTL_GET_SUINFO ioctl is used
365 * in lssu, nilfs_resize utilities and by nilfs_cleanerd daemon.
366 *
367 * Return value: count of nilfs_suinfo structures in output buffer.
368 */
369static ssize_t
370nilfs_ioctl_do_get_suinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
371 void *buf, size_t size, size_t nmembs)
372{
373 int ret;
374
375 down_read(&nilfs->ns_segctor_sem);
376 ret = nilfs_sufile_get_suinfo(nilfs->ns_sufile, *posp, buf, size,
377 nmembs);
378 up_read(&nilfs->ns_segctor_sem);
379 return ret;
380}
381
382/**
383 * nilfs_ioctl_get_sustat - get segment usage statistics
384 * @inode: inode object
385 * @filp: file object
386 * @cmd: ioctl's request code
387 * @argp: pointer on argument from userspace
388 *
389 * Description: nilfs_ioctl_get_sustat() returns segment usage statistics.
390 * The NILFS_IOCTL_GET_SUSTAT ioctl is used in lssu, nilfs_resize utilities
391 * and by nilfs_cleanerd daemon.
392 *
393 * Return Value: On success, 0 is returned, and segment usage information is
394 * copied into userspace pointer @argp. On error, one of the following
395 * negative error codes is returned.
396 *
397 * %-EIO - I/O error.
398 *
399 * %-ENOMEM - Insufficient amount of memory available.
400 *
401 * %-EFAULT - Failure during getting segment usage statistics.
402 */
403static int nilfs_ioctl_get_sustat(struct inode *inode, struct file *filp,
404 unsigned int cmd, void __user *argp)
405{
406 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
407 struct nilfs_sustat sustat;
408 int ret;
409
410 down_read(&nilfs->ns_segctor_sem);
411 ret = nilfs_sufile_get_stat(nilfs->ns_sufile, &sustat);
412 up_read(&nilfs->ns_segctor_sem);
413 if (ret < 0)
414 return ret;
415
416 if (copy_to_user(argp, &sustat, sizeof(sustat)))
417 ret = -EFAULT;
418 return ret;
419}
420
421/**
422 * nilfs_ioctl_do_get_vinfo - callback method getting virtual blocks info
423 * @nilfs: nilfs object
424 * @posp: *not used*
425 * @flags: *not used*
426 * @buf: buffer for storing array of nilfs_vinfo structures
427 * @size: size in bytes of one vinfo item in array
428 * @nmembs: count of vinfos in array
429 *
430 * Description: nilfs_ioctl_do_get_vinfo() function returns information
431 * on virtual block addresses. The NILFS_IOCTL_GET_VINFO ioctl is used
432 * by nilfs_cleanerd daemon.
433 *
434 * Return value: count of nilfs_vinfo structures in output buffer.
435 */
436static ssize_t
437nilfs_ioctl_do_get_vinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
438 void *buf, size_t size, size_t nmembs)
439{
440 int ret;
441
442 down_read(&nilfs->ns_segctor_sem);
443 ret = nilfs_dat_get_vinfo(nilfs->ns_dat, buf, size, nmembs);
444 up_read(&nilfs->ns_segctor_sem);
445 return ret;
446}
447
448/**
449 * nilfs_ioctl_do_get_bdescs - callback method getting disk block descriptors
450 * @nilfs: nilfs object
451 * @posp: *not used*
452 * @flags: *not used*
453 * @buf: buffer for storing array of nilfs_bdesc structures
454 * @size: size in bytes of one bdesc item in array
455 * @nmembs: count of bdescs in array
456 *
457 * Description: nilfs_ioctl_do_get_bdescs() function returns information
458 * about descriptors of disk block numbers. The NILFS_IOCTL_GET_BDESCS ioctl
459 * is used by nilfs_cleanerd daemon.
460 *
461 * Return value: count of nilfs_bdescs structures in output buffer.
462 */
463static ssize_t
464nilfs_ioctl_do_get_bdescs(struct the_nilfs *nilfs, __u64 *posp, int flags,
465 void *buf, size_t size, size_t nmembs)
466{
467 struct nilfs_bmap *bmap = NILFS_I(nilfs->ns_dat)->i_bmap;
468 struct nilfs_bdesc *bdescs = buf;
469 int ret, i;
470
471 down_read(&nilfs->ns_segctor_sem);
472 for (i = 0; i < nmembs; i++) {
473 ret = nilfs_bmap_lookup_at_level(bmap,
474 bdescs[i].bd_offset,
475 bdescs[i].bd_level + 1,
476 &bdescs[i].bd_blocknr);
477 if (ret < 0) {
478 if (ret != -ENOENT) {
479 up_read(&nilfs->ns_segctor_sem);
480 return ret;
481 }
482 bdescs[i].bd_blocknr = 0;
483 }
484 }
485 up_read(&nilfs->ns_segctor_sem);
486 return nmembs;
487}
488
489/**
490 * nilfs_ioctl_get_bdescs - get disk block descriptors
491 * @inode: inode object
492 * @filp: file object
493 * @cmd: ioctl's request code
494 * @argp: pointer on argument from userspace
495 *
496 * Description: nilfs_ioctl_do_get_bdescs() function returns information
497 * about descriptors of disk block numbers. The NILFS_IOCTL_GET_BDESCS ioctl
498 * is used by nilfs_cleanerd daemon.
499 *
500 * Return Value: On success, 0 is returned, and disk block descriptors are
501 * copied into userspace pointer @argp. On error, one of the following
502 * negative error codes is returned.
503 *
504 * %-EINVAL - Invalid arguments from userspace.
505 *
506 * %-EIO - I/O error.
507 *
508 * %-ENOMEM - Insufficient amount of memory available.
509 *
510 * %-EFAULT - Failure during getting disk block descriptors.
511 */
512static int nilfs_ioctl_get_bdescs(struct inode *inode, struct file *filp,
513 unsigned int cmd, void __user *argp)
514{
515 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
516 struct nilfs_argv argv;
517 int ret;
518
519 if (copy_from_user(&argv, argp, sizeof(argv)))
520 return -EFAULT;
521
522 if (argv.v_size != sizeof(struct nilfs_bdesc))
523 return -EINVAL;
524
525 ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd),
526 nilfs_ioctl_do_get_bdescs);
527 if (ret < 0)
528 return ret;
529
530 if (copy_to_user(argp, &argv, sizeof(argv)))
531 ret = -EFAULT;
532 return ret;
533}
534
535/**
536 * nilfs_ioctl_move_inode_block - prepare data/node block for moving by GC
537 * @inode: inode object
538 * @vdesc: descriptor of virtual block number
539 * @buffers: list of moving buffers
540 *
541 * Description: nilfs_ioctl_move_inode_block() function registers data/node
542 * buffer in the GC pagecache and submit read request.
543 *
544 * Return Value: On success, 0 is returned. On error, one of the following
545 * negative error codes is returned.
546 *
547 * %-EIO - I/O error.
548 *
549 * %-ENOMEM - Insufficient amount of memory available.
550 *
551 * %-ENOENT - Requested block doesn't exist.
552 *
553 * %-EEXIST - Blocks conflict is detected.
554 */
555static int nilfs_ioctl_move_inode_block(struct inode *inode,
556 struct nilfs_vdesc *vdesc,
557 struct list_head *buffers)
558{
559 struct buffer_head *bh;
560 int ret;
561
562 if (vdesc->vd_flags == 0)
563 ret = nilfs_gccache_submit_read_data(
564 inode, vdesc->vd_offset, vdesc->vd_blocknr,
565 vdesc->vd_vblocknr, &bh);
566 else
567 ret = nilfs_gccache_submit_read_node(
568 inode, vdesc->vd_blocknr, vdesc->vd_vblocknr, &bh);
569
570 if (unlikely(ret < 0)) {
571 if (ret == -ENOENT)
572 nilfs_crit(inode->i_sb,
573 "%s: invalid virtual block address (%s): ino=%llu, cno=%llu, offset=%llu, blocknr=%llu, vblocknr=%llu",
574 __func__, vdesc->vd_flags ? "node" : "data",
575 (unsigned long long)vdesc->vd_ino,
576 (unsigned long long)vdesc->vd_cno,
577 (unsigned long long)vdesc->vd_offset,
578 (unsigned long long)vdesc->vd_blocknr,
579 (unsigned long long)vdesc->vd_vblocknr);
580 return ret;
581 }
582 if (unlikely(!list_empty(&bh->b_assoc_buffers))) {
583 nilfs_crit(inode->i_sb,
584 "%s: conflicting %s buffer: ino=%llu, cno=%llu, offset=%llu, blocknr=%llu, vblocknr=%llu",
585 __func__, vdesc->vd_flags ? "node" : "data",
586 (unsigned long long)vdesc->vd_ino,
587 (unsigned long long)vdesc->vd_cno,
588 (unsigned long long)vdesc->vd_offset,
589 (unsigned long long)vdesc->vd_blocknr,
590 (unsigned long long)vdesc->vd_vblocknr);
591 brelse(bh);
592 return -EEXIST;
593 }
594 list_add_tail(&bh->b_assoc_buffers, buffers);
595 return 0;
596}
597
598/**
599 * nilfs_ioctl_move_blocks - move valid inode's blocks during garbage collection
600 * @sb: superblock object
601 * @argv: vector of arguments from userspace
602 * @buf: array of nilfs_vdesc structures
603 *
604 * Description: nilfs_ioctl_move_blocks() function reads valid data/node
605 * blocks that garbage collector specified with the array of nilfs_vdesc
606 * structures and stores them into page caches of GC inodes.
607 *
608 * Return Value: Number of processed nilfs_vdesc structures or
609 * error code, otherwise.
610 */
611static int nilfs_ioctl_move_blocks(struct super_block *sb,
612 struct nilfs_argv *argv, void *buf)
613{
614 size_t nmembs = argv->v_nmembs;
615 struct the_nilfs *nilfs = sb->s_fs_info;
616 struct inode *inode;
617 struct nilfs_vdesc *vdesc;
618 struct buffer_head *bh, *n;
619 LIST_HEAD(buffers);
620 ino_t ino;
621 __u64 cno;
622 int i, ret;
623
624 for (i = 0, vdesc = buf; i < nmembs; ) {
625 ino = vdesc->vd_ino;
626 cno = vdesc->vd_cno;
627 inode = nilfs_iget_for_gc(sb, ino, cno);
628 if (IS_ERR(inode)) {
629 ret = PTR_ERR(inode);
630 goto failed;
631 }
632 if (list_empty(&NILFS_I(inode)->i_dirty)) {
633 /*
634 * Add the inode to GC inode list. Garbage Collection
635 * is serialized and no two processes manipulate the
636 * list simultaneously.
637 */
638 igrab(inode);
639 list_add(&NILFS_I(inode)->i_dirty,
640 &nilfs->ns_gc_inodes);
641 }
642
643 do {
644 ret = nilfs_ioctl_move_inode_block(inode, vdesc,
645 &buffers);
646 if (unlikely(ret < 0)) {
647 iput(inode);
648 goto failed;
649 }
650 vdesc++;
651 } while (++i < nmembs &&
652 vdesc->vd_ino == ino && vdesc->vd_cno == cno);
653
654 iput(inode); /* The inode still remains in GC inode list */
655 }
656
657 list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) {
658 ret = nilfs_gccache_wait_and_mark_dirty(bh);
659 if (unlikely(ret < 0)) {
660 WARN_ON(ret == -EEXIST);
661 goto failed;
662 }
663 list_del_init(&bh->b_assoc_buffers);
664 brelse(bh);
665 }
666 return nmembs;
667
668 failed:
669 list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) {
670 list_del_init(&bh->b_assoc_buffers);
671 brelse(bh);
672 }
673 return ret;
674}
675
676/**
677 * nilfs_ioctl_delete_checkpoints - delete checkpoints
678 * @nilfs: nilfs object
679 * @argv: vector of arguments from userspace
680 * @buf: array of periods of checkpoints numbers
681 *
682 * Description: nilfs_ioctl_delete_checkpoints() function deletes checkpoints
683 * in the period from p_start to p_end, excluding p_end itself. The checkpoints
684 * which have been already deleted are ignored.
685 *
686 * Return Value: Number of processed nilfs_period structures or
687 * error code, otherwise.
688 *
689 * %-EIO - I/O error.
690 *
691 * %-ENOMEM - Insufficient amount of memory available.
692 *
693 * %-EINVAL - invalid checkpoints.
694 */
695static int nilfs_ioctl_delete_checkpoints(struct the_nilfs *nilfs,
696 struct nilfs_argv *argv, void *buf)
697{
698 size_t nmembs = argv->v_nmembs;
699 struct inode *cpfile = nilfs->ns_cpfile;
700 struct nilfs_period *periods = buf;
701 int ret, i;
702
703 for (i = 0; i < nmembs; i++) {
704 ret = nilfs_cpfile_delete_checkpoints(
705 cpfile, periods[i].p_start, periods[i].p_end);
706 if (ret < 0)
707 return ret;
708 }
709 return nmembs;
710}
711
712/**
713 * nilfs_ioctl_free_vblocknrs - free virtual block numbers
714 * @nilfs: nilfs object
715 * @argv: vector of arguments from userspace
716 * @buf: array of virtual block numbers
717 *
718 * Description: nilfs_ioctl_free_vblocknrs() function frees
719 * the virtual block numbers specified by @buf and @argv->v_nmembs.
720 *
721 * Return Value: Number of processed virtual block numbers or
722 * error code, otherwise.
723 *
724 * %-EIO - I/O error.
725 *
726 * %-ENOMEM - Insufficient amount of memory available.
727 *
728 * %-ENOENT - The virtual block number have not been allocated.
729 */
730static int nilfs_ioctl_free_vblocknrs(struct the_nilfs *nilfs,
731 struct nilfs_argv *argv, void *buf)
732{
733 size_t nmembs = argv->v_nmembs;
734 int ret;
735
736 ret = nilfs_dat_freev(nilfs->ns_dat, buf, nmembs);
737
738 return (ret < 0) ? ret : nmembs;
739}
740
741/**
742 * nilfs_ioctl_mark_blocks_dirty - mark blocks dirty
743 * @nilfs: nilfs object
744 * @argv: vector of arguments from userspace
745 * @buf: array of block descriptors
746 *
747 * Description: nilfs_ioctl_mark_blocks_dirty() function marks
748 * metadata file or data blocks as dirty.
749 *
750 * Return Value: Number of processed block descriptors or
751 * error code, otherwise.
752 *
753 * %-ENOMEM - Insufficient memory available.
754 *
755 * %-EIO - I/O error
756 *
757 * %-ENOENT - the specified block does not exist (hole block)
758 */
759static int nilfs_ioctl_mark_blocks_dirty(struct the_nilfs *nilfs,
760 struct nilfs_argv *argv, void *buf)
761{
762 size_t nmembs = argv->v_nmembs;
763 struct nilfs_bmap *bmap = NILFS_I(nilfs->ns_dat)->i_bmap;
764 struct nilfs_bdesc *bdescs = buf;
765 struct buffer_head *bh;
766 int ret, i;
767
768 for (i = 0; i < nmembs; i++) {
769 /* XXX: use macro or inline func to check liveness */
770 ret = nilfs_bmap_lookup_at_level(bmap,
771 bdescs[i].bd_offset,
772 bdescs[i].bd_level + 1,
773 &bdescs[i].bd_blocknr);
774 if (ret < 0) {
775 if (ret != -ENOENT)
776 return ret;
777 bdescs[i].bd_blocknr = 0;
778 }
779 if (bdescs[i].bd_blocknr != bdescs[i].bd_oblocknr)
780 /* skip dead block */
781 continue;
782 if (bdescs[i].bd_level == 0) {
783 ret = nilfs_mdt_get_block(nilfs->ns_dat,
784 bdescs[i].bd_offset,
785 false, NULL, &bh);
786 if (unlikely(ret)) {
787 WARN_ON(ret == -ENOENT);
788 return ret;
789 }
790 mark_buffer_dirty(bh);
791 nilfs_mdt_mark_dirty(nilfs->ns_dat);
792 put_bh(bh);
793 } else {
794 ret = nilfs_bmap_mark(bmap, bdescs[i].bd_offset,
795 bdescs[i].bd_level);
796 if (ret < 0) {
797 WARN_ON(ret == -ENOENT);
798 return ret;
799 }
800 }
801 }
802 return nmembs;
803}
804
805int nilfs_ioctl_prepare_clean_segments(struct the_nilfs *nilfs,
806 struct nilfs_argv *argv, void **kbufs)
807{
808 const char *msg;
809 int ret;
810
811 ret = nilfs_ioctl_delete_checkpoints(nilfs, &argv[1], kbufs[1]);
812 if (ret < 0) {
813 /*
814 * can safely abort because checkpoints can be removed
815 * independently.
816 */
817 msg = "cannot delete checkpoints";
818 goto failed;
819 }
820 ret = nilfs_ioctl_free_vblocknrs(nilfs, &argv[2], kbufs[2]);
821 if (ret < 0) {
822 /*
823 * can safely abort because DAT file is updated atomically
824 * using a copy-on-write technique.
825 */
826 msg = "cannot delete virtual blocks from DAT file";
827 goto failed;
828 }
829 ret = nilfs_ioctl_mark_blocks_dirty(nilfs, &argv[3], kbufs[3]);
830 if (ret < 0) {
831 /*
832 * can safely abort because the operation is nondestructive.
833 */
834 msg = "cannot mark copying blocks dirty";
835 goto failed;
836 }
837 return 0;
838
839 failed:
840 nilfs_err(nilfs->ns_sb, "error %d preparing GC: %s", ret, msg);
841 return ret;
842}
843
844/**
845 * nilfs_ioctl_clean_segments - clean segments
846 * @inode: inode object
847 * @filp: file object
848 * @cmd: ioctl's request code
849 * @argp: pointer on argument from userspace
850 *
851 * Description: nilfs_ioctl_clean_segments() function makes garbage
852 * collection operation in the environment of requested parameters
853 * from userspace. The NILFS_IOCTL_CLEAN_SEGMENTS ioctl is used by
854 * nilfs_cleanerd daemon.
855 *
856 * Return Value: On success, 0 is returned or error code, otherwise.
857 */
858static int nilfs_ioctl_clean_segments(struct inode *inode, struct file *filp,
859 unsigned int cmd, void __user *argp)
860{
861 struct nilfs_argv argv[5];
862 static const size_t argsz[5] = {
863 sizeof(struct nilfs_vdesc),
864 sizeof(struct nilfs_period),
865 sizeof(__u64),
866 sizeof(struct nilfs_bdesc),
867 sizeof(__u64),
868 };
869 void __user *base;
870 void *kbufs[5];
871 struct the_nilfs *nilfs;
872 size_t len, nsegs;
873 int n, ret;
874
875 if (!capable(CAP_SYS_ADMIN))
876 return -EPERM;
877
878 ret = mnt_want_write_file(filp);
879 if (ret)
880 return ret;
881
882 ret = -EFAULT;
883 if (copy_from_user(argv, argp, sizeof(argv)))
884 goto out;
885
886 ret = -EINVAL;
887 nsegs = argv[4].v_nmembs;
888 if (argv[4].v_size != argsz[4])
889 goto out;
890 if (nsegs > UINT_MAX / sizeof(__u64))
891 goto out;
892
893 /*
894 * argv[4] points to segment numbers this ioctl cleans. We
895 * use kmalloc() for its buffer because memory used for the
896 * segment numbers is enough small.
897 */
898 kbufs[4] = memdup_user((void __user *)(unsigned long)argv[4].v_base,
899 nsegs * sizeof(__u64));
900 if (IS_ERR(kbufs[4])) {
901 ret = PTR_ERR(kbufs[4]);
902 goto out;
903 }
904 nilfs = inode->i_sb->s_fs_info;
905
906 for (n = 0; n < 4; n++) {
907 ret = -EINVAL;
908 if (argv[n].v_size != argsz[n])
909 goto out_free;
910
911 if (argv[n].v_nmembs > nsegs * nilfs->ns_blocks_per_segment)
912 goto out_free;
913
914 if (argv[n].v_nmembs >= UINT_MAX / argv[n].v_size)
915 goto out_free;
916
917 len = argv[n].v_size * argv[n].v_nmembs;
918 base = (void __user *)(unsigned long)argv[n].v_base;
919 if (len == 0) {
920 kbufs[n] = NULL;
921 continue;
922 }
923
924 kbufs[n] = vmalloc(len);
925 if (!kbufs[n]) {
926 ret = -ENOMEM;
927 goto out_free;
928 }
929 if (copy_from_user(kbufs[n], base, len)) {
930 ret = -EFAULT;
931 vfree(kbufs[n]);
932 goto out_free;
933 }
934 }
935
936 /*
937 * nilfs_ioctl_move_blocks() will call nilfs_iget_for_gc(),
938 * which will operates an inode list without blocking.
939 * To protect the list from concurrent operations,
940 * nilfs_ioctl_move_blocks should be atomic operation.
941 */
942 if (test_and_set_bit(THE_NILFS_GC_RUNNING, &nilfs->ns_flags)) {
943 ret = -EBUSY;
944 goto out_free;
945 }
946
947 ret = nilfs_ioctl_move_blocks(inode->i_sb, &argv[0], kbufs[0]);
948 if (ret < 0) {
949 nilfs_err(inode->i_sb,
950 "error %d preparing GC: cannot read source blocks",
951 ret);
952 } else {
953 if (nilfs_sb_need_update(nilfs))
954 set_nilfs_discontinued(nilfs);
955 ret = nilfs_clean_segments(inode->i_sb, argv, kbufs);
956 }
957
958 nilfs_remove_all_gcinodes(nilfs);
959 clear_nilfs_gc_running(nilfs);
960
961out_free:
962 while (--n >= 0)
963 vfree(kbufs[n]);
964 kfree(kbufs[4]);
965out:
966 mnt_drop_write_file(filp);
967 return ret;
968}
969
970/**
971 * nilfs_ioctl_sync - make a checkpoint
972 * @inode: inode object
973 * @filp: file object
974 * @cmd: ioctl's request code
975 * @argp: pointer on argument from userspace
976 *
977 * Description: nilfs_ioctl_sync() function constructs a logical segment
978 * for checkpointing. This function guarantees that all modified data
979 * and metadata are written out to the device when it successfully
980 * returned.
981 *
982 * Return Value: On success, 0 is retured. On errors, one of the following
983 * negative error code is returned.
984 *
985 * %-EROFS - Read only filesystem.
986 *
987 * %-EIO - I/O error
988 *
989 * %-ENOSPC - No space left on device (only in a panic state).
990 *
991 * %-ERESTARTSYS - Interrupted.
992 *
993 * %-ENOMEM - Insufficient memory available.
994 *
995 * %-EFAULT - Failure during execution of requested operation.
996 */
997static int nilfs_ioctl_sync(struct inode *inode, struct file *filp,
998 unsigned int cmd, void __user *argp)
999{
1000 __u64 cno;
1001 int ret;
1002 struct the_nilfs *nilfs;
1003
1004 ret = nilfs_construct_segment(inode->i_sb);
1005 if (ret < 0)
1006 return ret;
1007
1008 nilfs = inode->i_sb->s_fs_info;
1009 ret = nilfs_flush_device(nilfs);
1010 if (ret < 0)
1011 return ret;
1012
1013 if (argp != NULL) {
1014 down_read(&nilfs->ns_segctor_sem);
1015 cno = nilfs->ns_cno - 1;
1016 up_read(&nilfs->ns_segctor_sem);
1017 if (copy_to_user(argp, &cno, sizeof(cno)))
1018 return -EFAULT;
1019 }
1020 return 0;
1021}
1022
1023/**
1024 * nilfs_ioctl_resize - resize NILFS2 volume
1025 * @inode: inode object
1026 * @filp: file object
1027 * @argp: pointer on argument from userspace
1028 *
1029 * Return Value: On success, 0 is returned or error code, otherwise.
1030 */
1031static int nilfs_ioctl_resize(struct inode *inode, struct file *filp,
1032 void __user *argp)
1033{
1034 __u64 newsize;
1035 int ret = -EPERM;
1036
1037 if (!capable(CAP_SYS_ADMIN))
1038 goto out;
1039
1040 ret = mnt_want_write_file(filp);
1041 if (ret)
1042 goto out;
1043
1044 ret = -EFAULT;
1045 if (copy_from_user(&newsize, argp, sizeof(newsize)))
1046 goto out_drop_write;
1047
1048 ret = nilfs_resize_fs(inode->i_sb, newsize);
1049
1050out_drop_write:
1051 mnt_drop_write_file(filp);
1052out:
1053 return ret;
1054}
1055
1056/**
1057 * nilfs_ioctl_trim_fs() - trim ioctl handle function
1058 * @inode: inode object
1059 * @argp: pointer on argument from userspace
1060 *
1061 * Decription: nilfs_ioctl_trim_fs is the FITRIM ioctl handle function. It
1062 * checks the arguments from userspace and calls nilfs_sufile_trim_fs, which
1063 * performs the actual trim operation.
1064 *
1065 * Return Value: On success, 0 is returned or negative error code, otherwise.
1066 */
1067static int nilfs_ioctl_trim_fs(struct inode *inode, void __user *argp)
1068{
1069 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
1070 struct request_queue *q = bdev_get_queue(nilfs->ns_bdev);
1071 struct fstrim_range range;
1072 int ret;
1073
1074 if (!capable(CAP_SYS_ADMIN))
1075 return -EPERM;
1076
1077 if (!blk_queue_discard(q))
1078 return -EOPNOTSUPP;
1079
1080 if (copy_from_user(&range, argp, sizeof(range)))
1081 return -EFAULT;
1082
1083 range.minlen = max_t(u64, range.minlen, q->limits.discard_granularity);
1084
1085 down_read(&nilfs->ns_segctor_sem);
1086 ret = nilfs_sufile_trim_fs(nilfs->ns_sufile, &range);
1087 up_read(&nilfs->ns_segctor_sem);
1088
1089 if (ret < 0)
1090 return ret;
1091
1092 if (copy_to_user(argp, &range, sizeof(range)))
1093 return -EFAULT;
1094
1095 return 0;
1096}
1097
1098/**
1099 * nilfs_ioctl_set_alloc_range - limit range of segments to be allocated
1100 * @inode: inode object
1101 * @argp: pointer on argument from userspace
1102 *
1103 * Decription: nilfs_ioctl_set_alloc_range() function defines lower limit
1104 * of segments in bytes and upper limit of segments in bytes.
1105 * The NILFS_IOCTL_SET_ALLOC_RANGE is used by nilfs_resize utility.
1106 *
1107 * Return Value: On success, 0 is returned or error code, otherwise.
1108 */
1109static int nilfs_ioctl_set_alloc_range(struct inode *inode, void __user *argp)
1110{
1111 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
1112 __u64 range[2];
1113 __u64 minseg, maxseg;
1114 unsigned long segbytes;
1115 int ret = -EPERM;
1116
1117 if (!capable(CAP_SYS_ADMIN))
1118 goto out;
1119
1120 ret = -EFAULT;
1121 if (copy_from_user(range, argp, sizeof(__u64[2])))
1122 goto out;
1123
1124 ret = -ERANGE;
1125 if (range[1] > i_size_read(inode->i_sb->s_bdev->bd_inode))
1126 goto out;
1127
1128 segbytes = nilfs->ns_blocks_per_segment * nilfs->ns_blocksize;
1129
1130 minseg = range[0] + segbytes - 1;
1131 do_div(minseg, segbytes);
1132 maxseg = NILFS_SB2_OFFSET_BYTES(range[1]);
1133 do_div(maxseg, segbytes);
1134 maxseg--;
1135
1136 ret = nilfs_sufile_set_alloc_range(nilfs->ns_sufile, minseg, maxseg);
1137out:
1138 return ret;
1139}
1140
1141/**
1142 * nilfs_ioctl_get_info - wrapping function of get metadata info
1143 * @inode: inode object
1144 * @filp: file object
1145 * @cmd: ioctl's request code
1146 * @argp: pointer on argument from userspace
1147 * @membsz: size of an item in bytes
1148 * @dofunc: concrete function of getting metadata info
1149 *
1150 * Description: nilfs_ioctl_get_info() gets metadata info by means of
1151 * calling dofunc() function.
1152 *
1153 * Return Value: On success, 0 is returned and requested metadata info
1154 * is copied into userspace. On error, one of the following
1155 * negative error codes is returned.
1156 *
1157 * %-EINVAL - Invalid arguments from userspace.
1158 *
1159 * %-ENOMEM - Insufficient amount of memory available.
1160 *
1161 * %-EFAULT - Failure during execution of requested operation.
1162 */
1163static int nilfs_ioctl_get_info(struct inode *inode, struct file *filp,
1164 unsigned int cmd, void __user *argp,
1165 size_t membsz,
1166 ssize_t (*dofunc)(struct the_nilfs *,
1167 __u64 *, int,
1168 void *, size_t, size_t))
1169
1170{
1171 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
1172 struct nilfs_argv argv;
1173 int ret;
1174
1175 if (copy_from_user(&argv, argp, sizeof(argv)))
1176 return -EFAULT;
1177
1178 if (argv.v_size < membsz)
1179 return -EINVAL;
1180
1181 ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), dofunc);
1182 if (ret < 0)
1183 return ret;
1184
1185 if (copy_to_user(argp, &argv, sizeof(argv)))
1186 ret = -EFAULT;
1187 return ret;
1188}
1189
1190/**
1191 * nilfs_ioctl_set_suinfo - set segment usage info
1192 * @inode: inode object
1193 * @filp: file object
1194 * @cmd: ioctl's request code
1195 * @argp: pointer on argument from userspace
1196 *
1197 * Description: Expects an array of nilfs_suinfo_update structures
1198 * encapsulated in nilfs_argv and updates the segment usage info
1199 * according to the flags in nilfs_suinfo_update.
1200 *
1201 * Return Value: On success, 0 is returned. On error, one of the
1202 * following negative error codes is returned.
1203 *
1204 * %-EPERM - Not enough permissions
1205 *
1206 * %-EFAULT - Error copying input data
1207 *
1208 * %-EIO - I/O error.
1209 *
1210 * %-ENOMEM - Insufficient amount of memory available.
1211 *
1212 * %-EINVAL - Invalid values in input (segment number, flags or nblocks)
1213 */
1214static int nilfs_ioctl_set_suinfo(struct inode *inode, struct file *filp,
1215 unsigned int cmd, void __user *argp)
1216{
1217 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
1218 struct nilfs_transaction_info ti;
1219 struct nilfs_argv argv;
1220 size_t len;
1221 void __user *base;
1222 void *kbuf;
1223 int ret;
1224
1225 if (!capable(CAP_SYS_ADMIN))
1226 return -EPERM;
1227
1228 ret = mnt_want_write_file(filp);
1229 if (ret)
1230 return ret;
1231
1232 ret = -EFAULT;
1233 if (copy_from_user(&argv, argp, sizeof(argv)))
1234 goto out;
1235
1236 ret = -EINVAL;
1237 if (argv.v_size < sizeof(struct nilfs_suinfo_update))
1238 goto out;
1239
1240 if (argv.v_nmembs > nilfs->ns_nsegments)
1241 goto out;
1242
1243 if (argv.v_nmembs >= UINT_MAX / argv.v_size)
1244 goto out;
1245
1246 len = argv.v_size * argv.v_nmembs;
1247 if (!len) {
1248 ret = 0;
1249 goto out;
1250 }
1251
1252 base = (void __user *)(unsigned long)argv.v_base;
1253 kbuf = vmalloc(len);
1254 if (!kbuf) {
1255 ret = -ENOMEM;
1256 goto out;
1257 }
1258
1259 if (copy_from_user(kbuf, base, len)) {
1260 ret = -EFAULT;
1261 goto out_free;
1262 }
1263
1264 nilfs_transaction_begin(inode->i_sb, &ti, 0);
1265 ret = nilfs_sufile_set_suinfo(nilfs->ns_sufile, kbuf, argv.v_size,
1266 argv.v_nmembs);
1267 if (unlikely(ret < 0))
1268 nilfs_transaction_abort(inode->i_sb);
1269 else
1270 nilfs_transaction_commit(inode->i_sb); /* never fails */
1271
1272out_free:
1273 vfree(kbuf);
1274out:
1275 mnt_drop_write_file(filp);
1276 return ret;
1277}
1278
1279long nilfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1280{
1281 struct inode *inode = file_inode(filp);
1282 void __user *argp = (void __user *)arg;
1283
1284 switch (cmd) {
1285 case FS_IOC_GETFLAGS:
1286 return nilfs_ioctl_getflags(inode, argp);
1287 case FS_IOC_SETFLAGS:
1288 return nilfs_ioctl_setflags(inode, filp, argp);
1289 case FS_IOC_GETVERSION:
1290 return nilfs_ioctl_getversion(inode, argp);
1291 case NILFS_IOCTL_CHANGE_CPMODE:
1292 return nilfs_ioctl_change_cpmode(inode, filp, cmd, argp);
1293 case NILFS_IOCTL_DELETE_CHECKPOINT:
1294 return nilfs_ioctl_delete_checkpoint(inode, filp, cmd, argp);
1295 case NILFS_IOCTL_GET_CPINFO:
1296 return nilfs_ioctl_get_info(inode, filp, cmd, argp,
1297 sizeof(struct nilfs_cpinfo),
1298 nilfs_ioctl_do_get_cpinfo);
1299 case NILFS_IOCTL_GET_CPSTAT:
1300 return nilfs_ioctl_get_cpstat(inode, filp, cmd, argp);
1301 case NILFS_IOCTL_GET_SUINFO:
1302 return nilfs_ioctl_get_info(inode, filp, cmd, argp,
1303 sizeof(struct nilfs_suinfo),
1304 nilfs_ioctl_do_get_suinfo);
1305 case NILFS_IOCTL_SET_SUINFO:
1306 return nilfs_ioctl_set_suinfo(inode, filp, cmd, argp);
1307 case NILFS_IOCTL_GET_SUSTAT:
1308 return nilfs_ioctl_get_sustat(inode, filp, cmd, argp);
1309 case NILFS_IOCTL_GET_VINFO:
1310 return nilfs_ioctl_get_info(inode, filp, cmd, argp,
1311 sizeof(struct nilfs_vinfo),
1312 nilfs_ioctl_do_get_vinfo);
1313 case NILFS_IOCTL_GET_BDESCS:
1314 return nilfs_ioctl_get_bdescs(inode, filp, cmd, argp);
1315 case NILFS_IOCTL_CLEAN_SEGMENTS:
1316 return nilfs_ioctl_clean_segments(inode, filp, cmd, argp);
1317 case NILFS_IOCTL_SYNC:
1318 return nilfs_ioctl_sync(inode, filp, cmd, argp);
1319 case NILFS_IOCTL_RESIZE:
1320 return nilfs_ioctl_resize(inode, filp, argp);
1321 case NILFS_IOCTL_SET_ALLOC_RANGE:
1322 return nilfs_ioctl_set_alloc_range(inode, argp);
1323 case FITRIM:
1324 return nilfs_ioctl_trim_fs(inode, argp);
1325 default:
1326 return -ENOTTY;
1327 }
1328}
1329
1330#ifdef CONFIG_COMPAT
1331long nilfs_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1332{
1333 switch (cmd) {
1334 case FS_IOC32_GETFLAGS:
1335 cmd = FS_IOC_GETFLAGS;
1336 break;
1337 case FS_IOC32_SETFLAGS:
1338 cmd = FS_IOC_SETFLAGS;
1339 break;
1340 case FS_IOC32_GETVERSION:
1341 cmd = FS_IOC_GETVERSION;
1342 break;
1343 case NILFS_IOCTL_CHANGE_CPMODE:
1344 case NILFS_IOCTL_DELETE_CHECKPOINT:
1345 case NILFS_IOCTL_GET_CPINFO:
1346 case NILFS_IOCTL_GET_CPSTAT:
1347 case NILFS_IOCTL_GET_SUINFO:
1348 case NILFS_IOCTL_SET_SUINFO:
1349 case NILFS_IOCTL_GET_SUSTAT:
1350 case NILFS_IOCTL_GET_VINFO:
1351 case NILFS_IOCTL_GET_BDESCS:
1352 case NILFS_IOCTL_CLEAN_SEGMENTS:
1353 case NILFS_IOCTL_SYNC:
1354 case NILFS_IOCTL_RESIZE:
1355 case NILFS_IOCTL_SET_ALLOC_RANGE:
1356 case FITRIM:
1357 break;
1358 default:
1359 return -ENOIOCTLCMD;
1360 }
1361 return nilfs_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
1362}
1363#endif