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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_zeroed_page(GFP_NOFS);
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 mnt_idmap *idmap,
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_set_ctime_current(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
876 /*
877 * argv[4] points to segment numbers this ioctl cleans. We
878 * use kmalloc() for its buffer because the memory used for the
879 * segment numbers is small enough.
880 */
881 kbufs[4] = memdup_array_user((void __user *)(unsigned long)argv[4].v_base,
882 nsegs, sizeof(__u64));
883 if (IS_ERR(kbufs[4])) {
884 ret = PTR_ERR(kbufs[4]);
885 goto out;
886 }
887 nilfs = inode->i_sb->s_fs_info;
888
889 for (n = 0; n < 4; n++) {
890 ret = -EINVAL;
891 if (argv[n].v_size != argsz[n])
892 goto out_free;
893
894 if (argv[n].v_nmembs > nsegs * nilfs->ns_blocks_per_segment)
895 goto out_free;
896
897 if (argv[n].v_nmembs >= UINT_MAX / argv[n].v_size)
898 goto out_free;
899
900 len = argv[n].v_size * argv[n].v_nmembs;
901 base = (void __user *)(unsigned long)argv[n].v_base;
902 if (len == 0) {
903 kbufs[n] = NULL;
904 continue;
905 }
906
907 kbufs[n] = vmalloc(len);
908 if (!kbufs[n]) {
909 ret = -ENOMEM;
910 goto out_free;
911 }
912 if (copy_from_user(kbufs[n], base, len)) {
913 ret = -EFAULT;
914 vfree(kbufs[n]);
915 goto out_free;
916 }
917 }
918
919 /*
920 * nilfs_ioctl_move_blocks() will call nilfs_iget_for_gc(),
921 * which will operates an inode list without blocking.
922 * To protect the list from concurrent operations,
923 * nilfs_ioctl_move_blocks should be atomic operation.
924 */
925 if (test_and_set_bit(THE_NILFS_GC_RUNNING, &nilfs->ns_flags)) {
926 ret = -EBUSY;
927 goto out_free;
928 }
929
930 ret = nilfs_ioctl_move_blocks(inode->i_sb, &argv[0], kbufs[0]);
931 if (ret < 0) {
932 nilfs_err(inode->i_sb,
933 "error %d preparing GC: cannot read source blocks",
934 ret);
935 } else {
936 if (nilfs_sb_need_update(nilfs))
937 set_nilfs_discontinued(nilfs);
938 ret = nilfs_clean_segments(inode->i_sb, argv, kbufs);
939 }
940
941 nilfs_remove_all_gcinodes(nilfs);
942 clear_nilfs_gc_running(nilfs);
943
944out_free:
945 while (--n >= 0)
946 vfree(kbufs[n]);
947 kfree(kbufs[4]);
948out:
949 mnt_drop_write_file(filp);
950 return ret;
951}
952
953/**
954 * nilfs_ioctl_sync - make a checkpoint
955 * @inode: inode object
956 * @filp: file object
957 * @cmd: ioctl's request code
958 * @argp: pointer on argument from userspace
959 *
960 * Description: nilfs_ioctl_sync() function constructs a logical segment
961 * for checkpointing. This function guarantees that all modified data
962 * and metadata are written out to the device when it successfully
963 * returned.
964 *
965 * Return Value: On success, 0 is retured. On errors, one of the following
966 * negative error code is returned.
967 *
968 * %-EROFS - Read only filesystem.
969 *
970 * %-EIO - I/O error
971 *
972 * %-ENOSPC - No space left on device (only in a panic state).
973 *
974 * %-ERESTARTSYS - Interrupted.
975 *
976 * %-ENOMEM - Insufficient memory available.
977 *
978 * %-EFAULT - Failure during execution of requested operation.
979 */
980static int nilfs_ioctl_sync(struct inode *inode, struct file *filp,
981 unsigned int cmd, void __user *argp)
982{
983 __u64 cno;
984 int ret;
985 struct the_nilfs *nilfs;
986
987 ret = nilfs_construct_segment(inode->i_sb);
988 if (ret < 0)
989 return ret;
990
991 nilfs = inode->i_sb->s_fs_info;
992 ret = nilfs_flush_device(nilfs);
993 if (ret < 0)
994 return ret;
995
996 if (argp != NULL) {
997 down_read(&nilfs->ns_segctor_sem);
998 cno = nilfs->ns_cno - 1;
999 up_read(&nilfs->ns_segctor_sem);
1000 if (copy_to_user(argp, &cno, sizeof(cno)))
1001 return -EFAULT;
1002 }
1003 return 0;
1004}
1005
1006/**
1007 * nilfs_ioctl_resize - resize NILFS2 volume
1008 * @inode: inode object
1009 * @filp: file object
1010 * @argp: pointer on argument from userspace
1011 *
1012 * Return Value: On success, 0 is returned or error code, otherwise.
1013 */
1014static int nilfs_ioctl_resize(struct inode *inode, struct file *filp,
1015 void __user *argp)
1016{
1017 __u64 newsize;
1018 int ret = -EPERM;
1019
1020 if (!capable(CAP_SYS_ADMIN))
1021 goto out;
1022
1023 ret = mnt_want_write_file(filp);
1024 if (ret)
1025 goto out;
1026
1027 ret = -EFAULT;
1028 if (copy_from_user(&newsize, argp, sizeof(newsize)))
1029 goto out_drop_write;
1030
1031 ret = nilfs_resize_fs(inode->i_sb, newsize);
1032
1033out_drop_write:
1034 mnt_drop_write_file(filp);
1035out:
1036 return ret;
1037}
1038
1039/**
1040 * nilfs_ioctl_trim_fs() - trim ioctl handle function
1041 * @inode: inode object
1042 * @argp: pointer on argument from userspace
1043 *
1044 * Description: nilfs_ioctl_trim_fs is the FITRIM ioctl handle function. It
1045 * checks the arguments from userspace and calls nilfs_sufile_trim_fs, which
1046 * performs the actual trim operation.
1047 *
1048 * Return Value: On success, 0 is returned or negative error code, otherwise.
1049 */
1050static int nilfs_ioctl_trim_fs(struct inode *inode, void __user *argp)
1051{
1052 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
1053 struct fstrim_range range;
1054 int ret;
1055
1056 if (!capable(CAP_SYS_ADMIN))
1057 return -EPERM;
1058
1059 if (!bdev_max_discard_sectors(nilfs->ns_bdev))
1060 return -EOPNOTSUPP;
1061
1062 if (copy_from_user(&range, argp, sizeof(range)))
1063 return -EFAULT;
1064
1065 range.minlen = max_t(u64, range.minlen,
1066 bdev_discard_granularity(nilfs->ns_bdev));
1067
1068 down_read(&nilfs->ns_segctor_sem);
1069 ret = nilfs_sufile_trim_fs(nilfs->ns_sufile, &range);
1070 up_read(&nilfs->ns_segctor_sem);
1071
1072 if (ret < 0)
1073 return ret;
1074
1075 if (copy_to_user(argp, &range, sizeof(range)))
1076 return -EFAULT;
1077
1078 return 0;
1079}
1080
1081/**
1082 * nilfs_ioctl_set_alloc_range - limit range of segments to be allocated
1083 * @inode: inode object
1084 * @argp: pointer on argument from userspace
1085 *
1086 * Description: nilfs_ioctl_set_alloc_range() function defines lower limit
1087 * of segments in bytes and upper limit of segments in bytes.
1088 * The NILFS_IOCTL_SET_ALLOC_RANGE is used by nilfs_resize utility.
1089 *
1090 * Return Value: On success, 0 is returned or error code, otherwise.
1091 */
1092static int nilfs_ioctl_set_alloc_range(struct inode *inode, void __user *argp)
1093{
1094 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
1095 __u64 range[2];
1096 __u64 minseg, maxseg;
1097 unsigned long segbytes;
1098 int ret = -EPERM;
1099
1100 if (!capable(CAP_SYS_ADMIN))
1101 goto out;
1102
1103 ret = -EFAULT;
1104 if (copy_from_user(range, argp, sizeof(__u64[2])))
1105 goto out;
1106
1107 ret = -ERANGE;
1108 if (range[1] > bdev_nr_bytes(inode->i_sb->s_bdev))
1109 goto out;
1110
1111 segbytes = nilfs->ns_blocks_per_segment * nilfs->ns_blocksize;
1112
1113 minseg = range[0] + segbytes - 1;
1114 do_div(minseg, segbytes);
1115
1116 if (range[1] < 4096)
1117 goto out;
1118
1119 maxseg = NILFS_SB2_OFFSET_BYTES(range[1]);
1120 if (maxseg < segbytes)
1121 goto out;
1122
1123 do_div(maxseg, segbytes);
1124 maxseg--;
1125
1126 ret = nilfs_sufile_set_alloc_range(nilfs->ns_sufile, minseg, maxseg);
1127out:
1128 return ret;
1129}
1130
1131/**
1132 * nilfs_ioctl_get_info - wrapping function of get metadata info
1133 * @inode: inode object
1134 * @filp: file object
1135 * @cmd: ioctl's request code
1136 * @argp: pointer on argument from userspace
1137 * @membsz: size of an item in bytes
1138 * @dofunc: concrete function of getting metadata info
1139 *
1140 * Description: nilfs_ioctl_get_info() gets metadata info by means of
1141 * calling dofunc() function.
1142 *
1143 * Return Value: On success, 0 is returned and requested metadata info
1144 * is copied into userspace. On error, one of the following
1145 * negative error codes is returned.
1146 *
1147 * %-EINVAL - Invalid arguments from userspace.
1148 *
1149 * %-ENOMEM - Insufficient amount of memory available.
1150 *
1151 * %-EFAULT - Failure during execution of requested operation.
1152 */
1153static int nilfs_ioctl_get_info(struct inode *inode, struct file *filp,
1154 unsigned int cmd, void __user *argp,
1155 size_t membsz,
1156 ssize_t (*dofunc)(struct the_nilfs *,
1157 __u64 *, int,
1158 void *, size_t, size_t))
1159
1160{
1161 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
1162 struct nilfs_argv argv;
1163 int ret;
1164
1165 if (copy_from_user(&argv, argp, sizeof(argv)))
1166 return -EFAULT;
1167
1168 if (argv.v_size < membsz)
1169 return -EINVAL;
1170
1171 ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), dofunc);
1172 if (ret < 0)
1173 return ret;
1174
1175 if (copy_to_user(argp, &argv, sizeof(argv)))
1176 ret = -EFAULT;
1177 return ret;
1178}
1179
1180/**
1181 * nilfs_ioctl_set_suinfo - set segment usage info
1182 * @inode: inode object
1183 * @filp: file object
1184 * @cmd: ioctl's request code
1185 * @argp: pointer on argument from userspace
1186 *
1187 * Description: Expects an array of nilfs_suinfo_update structures
1188 * encapsulated in nilfs_argv and updates the segment usage info
1189 * according to the flags in nilfs_suinfo_update.
1190 *
1191 * Return Value: On success, 0 is returned. On error, one of the
1192 * following negative error codes is returned.
1193 *
1194 * %-EPERM - Not enough permissions
1195 *
1196 * %-EFAULT - Error copying input data
1197 *
1198 * %-EIO - I/O error.
1199 *
1200 * %-ENOMEM - Insufficient amount of memory available.
1201 *
1202 * %-EINVAL - Invalid values in input (segment number, flags or nblocks)
1203 */
1204static int nilfs_ioctl_set_suinfo(struct inode *inode, struct file *filp,
1205 unsigned int cmd, void __user *argp)
1206{
1207 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
1208 struct nilfs_transaction_info ti;
1209 struct nilfs_argv argv;
1210 size_t len;
1211 void __user *base;
1212 void *kbuf;
1213 int ret;
1214
1215 if (!capable(CAP_SYS_ADMIN))
1216 return -EPERM;
1217
1218 ret = mnt_want_write_file(filp);
1219 if (ret)
1220 return ret;
1221
1222 ret = -EFAULT;
1223 if (copy_from_user(&argv, argp, sizeof(argv)))
1224 goto out;
1225
1226 ret = -EINVAL;
1227 if (argv.v_size < sizeof(struct nilfs_suinfo_update))
1228 goto out;
1229
1230 if (argv.v_nmembs > nilfs->ns_nsegments)
1231 goto out;
1232
1233 if (argv.v_nmembs >= UINT_MAX / argv.v_size)
1234 goto out;
1235
1236 len = argv.v_size * argv.v_nmembs;
1237 if (!len) {
1238 ret = 0;
1239 goto out;
1240 }
1241
1242 base = (void __user *)(unsigned long)argv.v_base;
1243 kbuf = vmalloc(len);
1244 if (!kbuf) {
1245 ret = -ENOMEM;
1246 goto out;
1247 }
1248
1249 if (copy_from_user(kbuf, base, len)) {
1250 ret = -EFAULT;
1251 goto out_free;
1252 }
1253
1254 nilfs_transaction_begin(inode->i_sb, &ti, 0);
1255 ret = nilfs_sufile_set_suinfo(nilfs->ns_sufile, kbuf, argv.v_size,
1256 argv.v_nmembs);
1257 if (unlikely(ret < 0))
1258 nilfs_transaction_abort(inode->i_sb);
1259 else
1260 nilfs_transaction_commit(inode->i_sb); /* never fails */
1261
1262out_free:
1263 vfree(kbuf);
1264out:
1265 mnt_drop_write_file(filp);
1266 return ret;
1267}
1268
1269long nilfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1270{
1271 struct inode *inode = file_inode(filp);
1272 void __user *argp = (void __user *)arg;
1273
1274 switch (cmd) {
1275 case FS_IOC_GETVERSION:
1276 return nilfs_ioctl_getversion(inode, argp);
1277 case NILFS_IOCTL_CHANGE_CPMODE:
1278 return nilfs_ioctl_change_cpmode(inode, filp, cmd, argp);
1279 case NILFS_IOCTL_DELETE_CHECKPOINT:
1280 return nilfs_ioctl_delete_checkpoint(inode, filp, cmd, argp);
1281 case NILFS_IOCTL_GET_CPINFO:
1282 return nilfs_ioctl_get_info(inode, filp, cmd, argp,
1283 sizeof(struct nilfs_cpinfo),
1284 nilfs_ioctl_do_get_cpinfo);
1285 case NILFS_IOCTL_GET_CPSTAT:
1286 return nilfs_ioctl_get_cpstat(inode, filp, cmd, argp);
1287 case NILFS_IOCTL_GET_SUINFO:
1288 return nilfs_ioctl_get_info(inode, filp, cmd, argp,
1289 sizeof(struct nilfs_suinfo),
1290 nilfs_ioctl_do_get_suinfo);
1291 case NILFS_IOCTL_SET_SUINFO:
1292 return nilfs_ioctl_set_suinfo(inode, filp, cmd, argp);
1293 case NILFS_IOCTL_GET_SUSTAT:
1294 return nilfs_ioctl_get_sustat(inode, filp, cmd, argp);
1295 case NILFS_IOCTL_GET_VINFO:
1296 return nilfs_ioctl_get_info(inode, filp, cmd, argp,
1297 sizeof(struct nilfs_vinfo),
1298 nilfs_ioctl_do_get_vinfo);
1299 case NILFS_IOCTL_GET_BDESCS:
1300 return nilfs_ioctl_get_bdescs(inode, filp, cmd, argp);
1301 case NILFS_IOCTL_CLEAN_SEGMENTS:
1302 return nilfs_ioctl_clean_segments(inode, filp, cmd, argp);
1303 case NILFS_IOCTL_SYNC:
1304 return nilfs_ioctl_sync(inode, filp, cmd, argp);
1305 case NILFS_IOCTL_RESIZE:
1306 return nilfs_ioctl_resize(inode, filp, argp);
1307 case NILFS_IOCTL_SET_ALLOC_RANGE:
1308 return nilfs_ioctl_set_alloc_range(inode, argp);
1309 case FITRIM:
1310 return nilfs_ioctl_trim_fs(inode, argp);
1311 default:
1312 return -ENOTTY;
1313 }
1314}
1315
1316#ifdef CONFIG_COMPAT
1317long nilfs_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1318{
1319 switch (cmd) {
1320 case FS_IOC32_GETVERSION:
1321 cmd = FS_IOC_GETVERSION;
1322 break;
1323 case NILFS_IOCTL_CHANGE_CPMODE:
1324 case NILFS_IOCTL_DELETE_CHECKPOINT:
1325 case NILFS_IOCTL_GET_CPINFO:
1326 case NILFS_IOCTL_GET_CPSTAT:
1327 case NILFS_IOCTL_GET_SUINFO:
1328 case NILFS_IOCTL_SET_SUINFO:
1329 case NILFS_IOCTL_GET_SUSTAT:
1330 case NILFS_IOCTL_GET_VINFO:
1331 case NILFS_IOCTL_GET_BDESCS:
1332 case NILFS_IOCTL_CLEAN_SEGMENTS:
1333 case NILFS_IOCTL_SYNC:
1334 case NILFS_IOCTL_RESIZE:
1335 case NILFS_IOCTL_SET_ALLOC_RANGE:
1336 case FITRIM:
1337 break;
1338 default:
1339 return -ENOIOCTLCMD;
1340 }
1341 return nilfs_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
1342}
1343#endif
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 <linux/string.h>
21#include "nilfs.h"
22#include "segment.h"
23#include "bmap.h"
24#include "cpfile.h"
25#include "sufile.h"
26#include "dat.h"
27
28/**
29 * nilfs_ioctl_wrap_copy - wrapping function of get/set metadata info
30 * @nilfs: nilfs object
31 * @argv: vector of arguments from userspace
32 * @dir: set of direction flags
33 * @dofunc: concrete function of get/set metadata info
34 *
35 * Description: nilfs_ioctl_wrap_copy() gets/sets metadata info by means of
36 * calling dofunc() function on the basis of @argv argument.
37 *
38 * Return Value: On success, 0 is returned and requested metadata info
39 * is copied into userspace. On error, one of the following
40 * negative error codes is returned.
41 *
42 * %-EINVAL - Invalid arguments from userspace.
43 *
44 * %-ENOMEM - Insufficient amount of memory available.
45 *
46 * %-EFAULT - Failure during execution of requested operation.
47 */
48static int nilfs_ioctl_wrap_copy(struct the_nilfs *nilfs,
49 struct nilfs_argv *argv, int dir,
50 ssize_t (*dofunc)(struct the_nilfs *,
51 __u64 *, int,
52 void *, size_t, size_t))
53{
54 void *buf;
55 void __user *base = (void __user *)(unsigned long)argv->v_base;
56 size_t maxmembs, total, n;
57 ssize_t nr;
58 int ret, i;
59 __u64 pos, ppos;
60
61 if (argv->v_nmembs == 0)
62 return 0;
63
64 if ((size_t)argv->v_size > PAGE_SIZE)
65 return -EINVAL;
66
67 /*
68 * Reject pairs of a start item position (argv->v_index) and a
69 * total count (argv->v_nmembs) which leads position 'pos' to
70 * overflow by the increment at the end of the loop.
71 */
72 if (argv->v_index > ~(__u64)0 - argv->v_nmembs)
73 return -EINVAL;
74
75 buf = (void *)get_zeroed_page(GFP_NOFS);
76 if (unlikely(!buf))
77 return -ENOMEM;
78 maxmembs = PAGE_SIZE / argv->v_size;
79
80 ret = 0;
81 total = 0;
82 pos = argv->v_index;
83 for (i = 0; i < argv->v_nmembs; i += n) {
84 n = (argv->v_nmembs - i < maxmembs) ?
85 argv->v_nmembs - i : maxmembs;
86 if ((dir & _IOC_WRITE) &&
87 copy_from_user(buf, base + argv->v_size * i,
88 argv->v_size * n)) {
89 ret = -EFAULT;
90 break;
91 }
92 ppos = pos;
93 nr = dofunc(nilfs, &pos, argv->v_flags, buf, argv->v_size,
94 n);
95 if (nr < 0) {
96 ret = nr;
97 break;
98 }
99 if ((dir & _IOC_READ) &&
100 copy_to_user(base + argv->v_size * i, buf,
101 argv->v_size * nr)) {
102 ret = -EFAULT;
103 break;
104 }
105 total += nr;
106 if ((size_t)nr < n)
107 break;
108 if (pos == ppos)
109 pos += n;
110 }
111 argv->v_nmembs = total;
112
113 free_pages((unsigned long)buf, 0);
114 return ret;
115}
116
117/**
118 * nilfs_fileattr_get - retrieve miscellaneous file attributes
119 * @dentry: the object to retrieve from
120 * @fa: fileattr pointer
121 *
122 * Return: always 0 as success.
123 */
124int nilfs_fileattr_get(struct dentry *dentry, struct fileattr *fa)
125{
126 struct inode *inode = d_inode(dentry);
127
128 fileattr_fill_flags(fa, NILFS_I(inode)->i_flags & FS_FL_USER_VISIBLE);
129
130 return 0;
131}
132
133/**
134 * nilfs_fileattr_set - change miscellaneous file attributes
135 * @idmap: idmap of the mount
136 * @dentry: the object to change
137 * @fa: fileattr pointer
138 *
139 * Return: 0 on success, or a negative error code on failure.
140 */
141int nilfs_fileattr_set(struct mnt_idmap *idmap,
142 struct dentry *dentry, struct fileattr *fa)
143{
144 struct inode *inode = d_inode(dentry);
145 struct nilfs_transaction_info ti;
146 unsigned int flags, oldflags;
147 int ret;
148
149 if (fileattr_has_fsx(fa))
150 return -EOPNOTSUPP;
151
152 flags = nilfs_mask_flags(inode->i_mode, fa->flags);
153
154 ret = nilfs_transaction_begin(inode->i_sb, &ti, 0);
155 if (ret)
156 return ret;
157
158 oldflags = NILFS_I(inode)->i_flags & ~FS_FL_USER_MODIFIABLE;
159 NILFS_I(inode)->i_flags = oldflags | (flags & FS_FL_USER_MODIFIABLE);
160
161 nilfs_set_inode_flags(inode);
162 inode_set_ctime_current(inode);
163 if (IS_SYNC(inode))
164 nilfs_set_transaction_flag(NILFS_TI_SYNC);
165
166 nilfs_mark_inode_dirty(inode);
167 return nilfs_transaction_commit(inode->i_sb);
168}
169
170/**
171 * nilfs_ioctl_getversion - get info about a file's version (generation number)
172 * @inode: inode object
173 * @argp: userspace memory where the generation number of @inode is stored
174 *
175 * Return: 0 on success, or %-EFAULT on error.
176 */
177static int nilfs_ioctl_getversion(struct inode *inode, void __user *argp)
178{
179 return put_user(inode->i_generation, (int __user *)argp);
180}
181
182/**
183 * nilfs_ioctl_change_cpmode - change checkpoint mode (checkpoint/snapshot)
184 * @inode: inode object
185 * @filp: file object
186 * @cmd: ioctl's request code
187 * @argp: pointer on argument from userspace
188 *
189 * Description: nilfs_ioctl_change_cpmode() function changes mode of
190 * given checkpoint between checkpoint and snapshot state. This ioctl
191 * is used in chcp and mkcp utilities.
192 *
193 * Return Value: On success, 0 is returned and mode of a checkpoint is
194 * changed. On error, one of the following negative error codes
195 * is returned.
196 *
197 * %-EPERM - Operation not permitted.
198 *
199 * %-EFAULT - Failure during checkpoint mode changing.
200 */
201static int nilfs_ioctl_change_cpmode(struct inode *inode, struct file *filp,
202 unsigned int cmd, void __user *argp)
203{
204 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
205 struct nilfs_transaction_info ti;
206 struct nilfs_cpmode cpmode;
207 int ret;
208
209 if (!capable(CAP_SYS_ADMIN))
210 return -EPERM;
211
212 ret = mnt_want_write_file(filp);
213 if (ret)
214 return ret;
215
216 ret = -EFAULT;
217 if (copy_from_user(&cpmode, argp, sizeof(cpmode)))
218 goto out;
219
220 mutex_lock(&nilfs->ns_snapshot_mount_mutex);
221
222 nilfs_transaction_begin(inode->i_sb, &ti, 0);
223 ret = nilfs_cpfile_change_cpmode(
224 nilfs->ns_cpfile, cpmode.cm_cno, cpmode.cm_mode);
225 if (unlikely(ret < 0))
226 nilfs_transaction_abort(inode->i_sb);
227 else
228 nilfs_transaction_commit(inode->i_sb); /* never fails */
229
230 mutex_unlock(&nilfs->ns_snapshot_mount_mutex);
231out:
232 mnt_drop_write_file(filp);
233 return ret;
234}
235
236/**
237 * nilfs_ioctl_delete_checkpoint - remove checkpoint
238 * @inode: inode object
239 * @filp: file object
240 * @cmd: ioctl's request code
241 * @argp: pointer on argument from userspace
242 *
243 * Description: nilfs_ioctl_delete_checkpoint() function removes
244 * checkpoint from NILFS2 file system. This ioctl is used in rmcp
245 * utility.
246 *
247 * Return Value: On success, 0 is returned and a checkpoint is
248 * removed. On error, one of the following negative error codes
249 * is returned.
250 *
251 * %-EPERM - Operation not permitted.
252 *
253 * %-EFAULT - Failure during checkpoint removing.
254 */
255static int
256nilfs_ioctl_delete_checkpoint(struct inode *inode, struct file *filp,
257 unsigned int cmd, void __user *argp)
258{
259 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
260 struct nilfs_transaction_info ti;
261 __u64 cno;
262 int ret;
263
264 if (!capable(CAP_SYS_ADMIN))
265 return -EPERM;
266
267 ret = mnt_want_write_file(filp);
268 if (ret)
269 return ret;
270
271 ret = -EFAULT;
272 if (copy_from_user(&cno, argp, sizeof(cno)))
273 goto out;
274
275 nilfs_transaction_begin(inode->i_sb, &ti, 0);
276 ret = nilfs_cpfile_delete_checkpoint(nilfs->ns_cpfile, cno);
277 if (unlikely(ret < 0))
278 nilfs_transaction_abort(inode->i_sb);
279 else
280 nilfs_transaction_commit(inode->i_sb); /* never fails */
281out:
282 mnt_drop_write_file(filp);
283 return ret;
284}
285
286/**
287 * nilfs_ioctl_do_get_cpinfo - callback method getting info about checkpoints
288 * @nilfs: nilfs object
289 * @posp: pointer on array of checkpoint's numbers
290 * @flags: checkpoint mode (checkpoint or snapshot)
291 * @buf: buffer for storing checkponts' info
292 * @size: size in bytes of one checkpoint info item in array
293 * @nmembs: number of checkpoints in array (numbers and infos)
294 *
295 * Description: nilfs_ioctl_do_get_cpinfo() function returns info about
296 * requested checkpoints. The NILFS_IOCTL_GET_CPINFO ioctl is used in
297 * lscp utility and by nilfs_cleanerd daemon.
298 *
299 * Return value: count of nilfs_cpinfo structures in output buffer.
300 */
301static ssize_t
302nilfs_ioctl_do_get_cpinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
303 void *buf, size_t size, size_t nmembs)
304{
305 int ret;
306
307 down_read(&nilfs->ns_segctor_sem);
308 ret = nilfs_cpfile_get_cpinfo(nilfs->ns_cpfile, posp, flags, buf,
309 size, nmembs);
310 up_read(&nilfs->ns_segctor_sem);
311 return ret;
312}
313
314/**
315 * nilfs_ioctl_get_cpstat - get checkpoints statistics
316 * @inode: inode object
317 * @filp: file object
318 * @cmd: ioctl's request code
319 * @argp: pointer on argument from userspace
320 *
321 * Description: nilfs_ioctl_get_cpstat() returns information about checkpoints.
322 * The NILFS_IOCTL_GET_CPSTAT ioctl is used by lscp, rmcp utilities
323 * and by nilfs_cleanerd daemon.
324 *
325 * Return Value: On success, 0 is returned, and checkpoints information is
326 * copied into userspace pointer @argp. On error, one of the following
327 * negative error codes is returned.
328 *
329 * %-EIO - I/O error.
330 *
331 * %-ENOMEM - Insufficient amount of memory available.
332 *
333 * %-EFAULT - Failure during getting checkpoints statistics.
334 */
335static int nilfs_ioctl_get_cpstat(struct inode *inode, struct file *filp,
336 unsigned int cmd, void __user *argp)
337{
338 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
339 struct nilfs_cpstat cpstat;
340 int ret;
341
342 down_read(&nilfs->ns_segctor_sem);
343 ret = nilfs_cpfile_get_stat(nilfs->ns_cpfile, &cpstat);
344 up_read(&nilfs->ns_segctor_sem);
345 if (ret < 0)
346 return ret;
347
348 if (copy_to_user(argp, &cpstat, sizeof(cpstat)))
349 ret = -EFAULT;
350 return ret;
351}
352
353/**
354 * nilfs_ioctl_do_get_suinfo - callback method getting segment usage info
355 * @nilfs: nilfs object
356 * @posp: pointer on array of segment numbers
357 * @flags: *not used*
358 * @buf: buffer for storing suinfo array
359 * @size: size in bytes of one suinfo item in array
360 * @nmembs: count of segment numbers and suinfos in array
361 *
362 * Description: nilfs_ioctl_do_get_suinfo() function returns segment usage
363 * info about requested segments. The NILFS_IOCTL_GET_SUINFO ioctl is used
364 * in lssu, nilfs_resize utilities and by nilfs_cleanerd daemon.
365 *
366 * Return value: count of nilfs_suinfo structures in output buffer.
367 */
368static ssize_t
369nilfs_ioctl_do_get_suinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
370 void *buf, size_t size, size_t nmembs)
371{
372 int ret;
373
374 down_read(&nilfs->ns_segctor_sem);
375 ret = nilfs_sufile_get_suinfo(nilfs->ns_sufile, *posp, buf, size,
376 nmembs);
377 up_read(&nilfs->ns_segctor_sem);
378 return ret;
379}
380
381/**
382 * nilfs_ioctl_get_sustat - get segment usage statistics
383 * @inode: inode object
384 * @filp: file object
385 * @cmd: ioctl's request code
386 * @argp: pointer on argument from userspace
387 *
388 * Description: nilfs_ioctl_get_sustat() returns segment usage statistics.
389 * The NILFS_IOCTL_GET_SUSTAT ioctl is used in lssu, nilfs_resize utilities
390 * and by nilfs_cleanerd daemon.
391 *
392 * Return Value: On success, 0 is returned, and segment usage information is
393 * copied into userspace pointer @argp. On error, one of the following
394 * negative error codes is returned.
395 *
396 * %-EIO - I/O error.
397 *
398 * %-ENOMEM - Insufficient amount of memory available.
399 *
400 * %-EFAULT - Failure during getting segment usage statistics.
401 */
402static int nilfs_ioctl_get_sustat(struct inode *inode, struct file *filp,
403 unsigned int cmd, void __user *argp)
404{
405 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
406 struct nilfs_sustat sustat;
407 int ret;
408
409 down_read(&nilfs->ns_segctor_sem);
410 ret = nilfs_sufile_get_stat(nilfs->ns_sufile, &sustat);
411 up_read(&nilfs->ns_segctor_sem);
412 if (ret < 0)
413 return ret;
414
415 if (copy_to_user(argp, &sustat, sizeof(sustat)))
416 ret = -EFAULT;
417 return ret;
418}
419
420/**
421 * nilfs_ioctl_do_get_vinfo - callback method getting virtual blocks info
422 * @nilfs: nilfs object
423 * @posp: *not used*
424 * @flags: *not used*
425 * @buf: buffer for storing array of nilfs_vinfo structures
426 * @size: size in bytes of one vinfo item in array
427 * @nmembs: count of vinfos in array
428 *
429 * Description: nilfs_ioctl_do_get_vinfo() function returns information
430 * on virtual block addresses. The NILFS_IOCTL_GET_VINFO ioctl is used
431 * by nilfs_cleanerd daemon.
432 *
433 * Return value: count of nilfs_vinfo structures in output buffer.
434 */
435static ssize_t
436nilfs_ioctl_do_get_vinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
437 void *buf, size_t size, size_t nmembs)
438{
439 int ret;
440
441 down_read(&nilfs->ns_segctor_sem);
442 ret = nilfs_dat_get_vinfo(nilfs->ns_dat, buf, size, nmembs);
443 up_read(&nilfs->ns_segctor_sem);
444 return ret;
445}
446
447/**
448 * nilfs_ioctl_do_get_bdescs - callback method getting disk block descriptors
449 * @nilfs: nilfs object
450 * @posp: *not used*
451 * @flags: *not used*
452 * @buf: buffer for storing array of nilfs_bdesc structures
453 * @size: size in bytes of one bdesc item in array
454 * @nmembs: count of bdescs in array
455 *
456 * Description: nilfs_ioctl_do_get_bdescs() function returns information
457 * about descriptors of disk block numbers. The NILFS_IOCTL_GET_BDESCS ioctl
458 * is used by nilfs_cleanerd daemon.
459 *
460 * Return value: count of nilfs_bdescs structures in output buffer.
461 */
462static ssize_t
463nilfs_ioctl_do_get_bdescs(struct the_nilfs *nilfs, __u64 *posp, int flags,
464 void *buf, size_t size, size_t nmembs)
465{
466 struct nilfs_bmap *bmap = NILFS_I(nilfs->ns_dat)->i_bmap;
467 struct nilfs_bdesc *bdescs = buf;
468 int ret, i;
469
470 down_read(&nilfs->ns_segctor_sem);
471 for (i = 0; i < nmembs; i++) {
472 ret = nilfs_bmap_lookup_at_level(bmap,
473 bdescs[i].bd_offset,
474 bdescs[i].bd_level + 1,
475 &bdescs[i].bd_blocknr);
476 if (ret < 0) {
477 if (ret != -ENOENT) {
478 up_read(&nilfs->ns_segctor_sem);
479 return ret;
480 }
481 bdescs[i].bd_blocknr = 0;
482 }
483 }
484 up_read(&nilfs->ns_segctor_sem);
485 return nmembs;
486}
487
488/**
489 * nilfs_ioctl_get_bdescs - get disk block descriptors
490 * @inode: inode object
491 * @filp: file object
492 * @cmd: ioctl's request code
493 * @argp: pointer on argument from userspace
494 *
495 * Description: nilfs_ioctl_do_get_bdescs() function returns information
496 * about descriptors of disk block numbers. The NILFS_IOCTL_GET_BDESCS ioctl
497 * is used by nilfs_cleanerd daemon.
498 *
499 * Return Value: On success, 0 is returned, and disk block descriptors are
500 * copied into userspace pointer @argp. On error, one of the following
501 * negative error codes is returned.
502 *
503 * %-EINVAL - Invalid arguments from userspace.
504 *
505 * %-EIO - I/O error.
506 *
507 * %-ENOMEM - Insufficient amount of memory available.
508 *
509 * %-EFAULT - Failure during getting disk block descriptors.
510 */
511static int nilfs_ioctl_get_bdescs(struct inode *inode, struct file *filp,
512 unsigned int cmd, void __user *argp)
513{
514 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
515 struct nilfs_argv argv;
516 int ret;
517
518 if (copy_from_user(&argv, argp, sizeof(argv)))
519 return -EFAULT;
520
521 if (argv.v_size != sizeof(struct nilfs_bdesc))
522 return -EINVAL;
523
524 ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd),
525 nilfs_ioctl_do_get_bdescs);
526 if (ret < 0)
527 return ret;
528
529 if (copy_to_user(argp, &argv, sizeof(argv)))
530 ret = -EFAULT;
531 return ret;
532}
533
534/**
535 * nilfs_ioctl_move_inode_block - prepare data/node block for moving by GC
536 * @inode: inode object
537 * @vdesc: descriptor of virtual block number
538 * @buffers: list of moving buffers
539 *
540 * Description: nilfs_ioctl_move_inode_block() function registers data/node
541 * buffer in the GC pagecache and submit read request.
542 *
543 * Return Value: On success, 0 is returned. On error, one of the following
544 * negative error codes is returned.
545 *
546 * %-EIO - I/O error.
547 *
548 * %-ENOMEM - Insufficient amount of memory available.
549 *
550 * %-ENOENT - Requested block doesn't exist.
551 *
552 * %-EEXIST - Blocks conflict is detected.
553 */
554static int nilfs_ioctl_move_inode_block(struct inode *inode,
555 struct nilfs_vdesc *vdesc,
556 struct list_head *buffers)
557{
558 struct buffer_head *bh;
559 int ret;
560
561 if (vdesc->vd_flags == 0)
562 ret = nilfs_gccache_submit_read_data(
563 inode, vdesc->vd_offset, vdesc->vd_blocknr,
564 vdesc->vd_vblocknr, &bh);
565 else
566 ret = nilfs_gccache_submit_read_node(
567 inode, vdesc->vd_blocknr, vdesc->vd_vblocknr, &bh);
568
569 if (unlikely(ret < 0)) {
570 if (ret == -ENOENT)
571 nilfs_crit(inode->i_sb,
572 "%s: invalid virtual block address (%s): ino=%llu, cno=%llu, offset=%llu, blocknr=%llu, vblocknr=%llu",
573 __func__, vdesc->vd_flags ? "node" : "data",
574 (unsigned long long)vdesc->vd_ino,
575 (unsigned long long)vdesc->vd_cno,
576 (unsigned long long)vdesc->vd_offset,
577 (unsigned long long)vdesc->vd_blocknr,
578 (unsigned long long)vdesc->vd_vblocknr);
579 return ret;
580 }
581 if (unlikely(!list_empty(&bh->b_assoc_buffers))) {
582 nilfs_crit(inode->i_sb,
583 "%s: conflicting %s buffer: ino=%llu, cno=%llu, offset=%llu, blocknr=%llu, vblocknr=%llu",
584 __func__, vdesc->vd_flags ? "node" : "data",
585 (unsigned long long)vdesc->vd_ino,
586 (unsigned long long)vdesc->vd_cno,
587 (unsigned long long)vdesc->vd_offset,
588 (unsigned long long)vdesc->vd_blocknr,
589 (unsigned long long)vdesc->vd_vblocknr);
590 brelse(bh);
591 return -EEXIST;
592 }
593 list_add_tail(&bh->b_assoc_buffers, buffers);
594 return 0;
595}
596
597/**
598 * nilfs_ioctl_move_blocks - move valid inode's blocks during garbage collection
599 * @sb: superblock object
600 * @argv: vector of arguments from userspace
601 * @buf: array of nilfs_vdesc structures
602 *
603 * Description: nilfs_ioctl_move_blocks() function reads valid data/node
604 * blocks that garbage collector specified with the array of nilfs_vdesc
605 * structures and stores them into page caches of GC inodes.
606 *
607 * Return Value: Number of processed nilfs_vdesc structures or
608 * error code, otherwise.
609 */
610static int nilfs_ioctl_move_blocks(struct super_block *sb,
611 struct nilfs_argv *argv, void *buf)
612{
613 size_t nmembs = argv->v_nmembs;
614 struct the_nilfs *nilfs = sb->s_fs_info;
615 struct inode *inode;
616 struct nilfs_vdesc *vdesc;
617 struct buffer_head *bh, *n;
618 LIST_HEAD(buffers);
619 ino_t ino;
620 __u64 cno;
621 int i, ret;
622
623 for (i = 0, vdesc = buf; i < nmembs; ) {
624 ino = vdesc->vd_ino;
625 cno = vdesc->vd_cno;
626 inode = nilfs_iget_for_gc(sb, ino, cno);
627 if (IS_ERR(inode)) {
628 ret = PTR_ERR(inode);
629 goto failed;
630 }
631 if (list_empty(&NILFS_I(inode)->i_dirty)) {
632 /*
633 * Add the inode to GC inode list. Garbage Collection
634 * is serialized and no two processes manipulate the
635 * list simultaneously.
636 */
637 igrab(inode);
638 list_add(&NILFS_I(inode)->i_dirty,
639 &nilfs->ns_gc_inodes);
640 }
641
642 do {
643 ret = nilfs_ioctl_move_inode_block(inode, vdesc,
644 &buffers);
645 if (unlikely(ret < 0)) {
646 iput(inode);
647 goto failed;
648 }
649 vdesc++;
650 } while (++i < nmembs &&
651 vdesc->vd_ino == ino && vdesc->vd_cno == cno);
652
653 iput(inode); /* The inode still remains in GC inode list */
654 }
655
656 list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) {
657 ret = nilfs_gccache_wait_and_mark_dirty(bh);
658 if (unlikely(ret < 0)) {
659 WARN_ON(ret == -EEXIST);
660 goto failed;
661 }
662 list_del_init(&bh->b_assoc_buffers);
663 brelse(bh);
664 }
665 return nmembs;
666
667 failed:
668 list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) {
669 list_del_init(&bh->b_assoc_buffers);
670 brelse(bh);
671 }
672 return ret;
673}
674
675/**
676 * nilfs_ioctl_delete_checkpoints - delete checkpoints
677 * @nilfs: nilfs object
678 * @argv: vector of arguments from userspace
679 * @buf: array of periods of checkpoints numbers
680 *
681 * Description: nilfs_ioctl_delete_checkpoints() function deletes checkpoints
682 * in the period from p_start to p_end, excluding p_end itself. The checkpoints
683 * which have been already deleted are ignored.
684 *
685 * Return Value: Number of processed nilfs_period structures or
686 * error code, otherwise.
687 *
688 * %-EIO - I/O error.
689 *
690 * %-ENOMEM - Insufficient amount of memory available.
691 *
692 * %-EINVAL - invalid checkpoints.
693 */
694static int nilfs_ioctl_delete_checkpoints(struct the_nilfs *nilfs,
695 struct nilfs_argv *argv, void *buf)
696{
697 size_t nmembs = argv->v_nmembs;
698 struct inode *cpfile = nilfs->ns_cpfile;
699 struct nilfs_period *periods = buf;
700 int ret, i;
701
702 for (i = 0; i < nmembs; i++) {
703 ret = nilfs_cpfile_delete_checkpoints(
704 cpfile, periods[i].p_start, periods[i].p_end);
705 if (ret < 0)
706 return ret;
707 }
708 return nmembs;
709}
710
711/**
712 * nilfs_ioctl_free_vblocknrs - free virtual block numbers
713 * @nilfs: nilfs object
714 * @argv: vector of arguments from userspace
715 * @buf: array of virtual block numbers
716 *
717 * Description: nilfs_ioctl_free_vblocknrs() function frees
718 * the virtual block numbers specified by @buf and @argv->v_nmembs.
719 *
720 * Return Value: Number of processed virtual block numbers or
721 * error code, otherwise.
722 *
723 * %-EIO - I/O error.
724 *
725 * %-ENOMEM - Insufficient amount of memory available.
726 *
727 * %-ENOENT - The virtual block number have not been allocated.
728 */
729static int nilfs_ioctl_free_vblocknrs(struct the_nilfs *nilfs,
730 struct nilfs_argv *argv, void *buf)
731{
732 size_t nmembs = argv->v_nmembs;
733 int ret;
734
735 ret = nilfs_dat_freev(nilfs->ns_dat, buf, nmembs);
736
737 return (ret < 0) ? ret : nmembs;
738}
739
740/**
741 * nilfs_ioctl_mark_blocks_dirty - mark blocks dirty
742 * @nilfs: nilfs object
743 * @argv: vector of arguments from userspace
744 * @buf: array of block descriptors
745 *
746 * Description: nilfs_ioctl_mark_blocks_dirty() function marks
747 * metadata file or data blocks as dirty.
748 *
749 * Return Value: Number of processed block descriptors or
750 * error code, otherwise.
751 *
752 * %-ENOMEM - Insufficient memory available.
753 *
754 * %-EIO - I/O error
755 *
756 * %-ENOENT - the specified block does not exist (hole block)
757 */
758static int nilfs_ioctl_mark_blocks_dirty(struct the_nilfs *nilfs,
759 struct nilfs_argv *argv, void *buf)
760{
761 size_t nmembs = argv->v_nmembs;
762 struct nilfs_bmap *bmap = NILFS_I(nilfs->ns_dat)->i_bmap;
763 struct nilfs_bdesc *bdescs = buf;
764 struct buffer_head *bh;
765 int ret, i;
766
767 for (i = 0; i < nmembs; i++) {
768 /* XXX: use macro or inline func to check liveness */
769 ret = nilfs_bmap_lookup_at_level(bmap,
770 bdescs[i].bd_offset,
771 bdescs[i].bd_level + 1,
772 &bdescs[i].bd_blocknr);
773 if (ret < 0) {
774 if (ret != -ENOENT)
775 return ret;
776 bdescs[i].bd_blocknr = 0;
777 }
778 if (bdescs[i].bd_blocknr != bdescs[i].bd_oblocknr)
779 /* skip dead block */
780 continue;
781 if (bdescs[i].bd_level == 0) {
782 ret = nilfs_mdt_get_block(nilfs->ns_dat,
783 bdescs[i].bd_offset,
784 false, NULL, &bh);
785 if (unlikely(ret)) {
786 WARN_ON(ret == -ENOENT);
787 return ret;
788 }
789 mark_buffer_dirty(bh);
790 nilfs_mdt_mark_dirty(nilfs->ns_dat);
791 put_bh(bh);
792 } else {
793 ret = nilfs_bmap_mark(bmap, bdescs[i].bd_offset,
794 bdescs[i].bd_level);
795 if (ret < 0) {
796 WARN_ON(ret == -ENOENT);
797 return ret;
798 }
799 }
800 }
801 return nmembs;
802}
803
804int nilfs_ioctl_prepare_clean_segments(struct the_nilfs *nilfs,
805 struct nilfs_argv *argv, void **kbufs)
806{
807 const char *msg;
808 int ret;
809
810 ret = nilfs_ioctl_delete_checkpoints(nilfs, &argv[1], kbufs[1]);
811 if (ret < 0) {
812 /*
813 * can safely abort because checkpoints can be removed
814 * independently.
815 */
816 msg = "cannot delete checkpoints";
817 goto failed;
818 }
819 ret = nilfs_ioctl_free_vblocknrs(nilfs, &argv[2], kbufs[2]);
820 if (ret < 0) {
821 /*
822 * can safely abort because DAT file is updated atomically
823 * using a copy-on-write technique.
824 */
825 msg = "cannot delete virtual blocks from DAT file";
826 goto failed;
827 }
828 ret = nilfs_ioctl_mark_blocks_dirty(nilfs, &argv[3], kbufs[3]);
829 if (ret < 0) {
830 /*
831 * can safely abort because the operation is nondestructive.
832 */
833 msg = "cannot mark copying blocks dirty";
834 goto failed;
835 }
836 return 0;
837
838 failed:
839 nilfs_err(nilfs->ns_sb, "error %d preparing GC: %s", ret, msg);
840 return ret;
841}
842
843/**
844 * nilfs_ioctl_clean_segments - clean segments
845 * @inode: inode object
846 * @filp: file object
847 * @cmd: ioctl's request code
848 * @argp: pointer on argument from userspace
849 *
850 * Description: nilfs_ioctl_clean_segments() function makes garbage
851 * collection operation in the environment of requested parameters
852 * from userspace. The NILFS_IOCTL_CLEAN_SEGMENTS ioctl is used by
853 * nilfs_cleanerd daemon.
854 *
855 * Return Value: On success, 0 is returned or error code, otherwise.
856 */
857static int nilfs_ioctl_clean_segments(struct inode *inode, struct file *filp,
858 unsigned int cmd, void __user *argp)
859{
860 struct nilfs_argv argv[5];
861 static const size_t argsz[5] = {
862 sizeof(struct nilfs_vdesc),
863 sizeof(struct nilfs_period),
864 sizeof(__u64),
865 sizeof(struct nilfs_bdesc),
866 sizeof(__u64),
867 };
868 void __user *base;
869 void *kbufs[5];
870 struct the_nilfs *nilfs;
871 size_t len, nsegs;
872 int n, ret;
873
874 if (!capable(CAP_SYS_ADMIN))
875 return -EPERM;
876
877 ret = mnt_want_write_file(filp);
878 if (ret)
879 return ret;
880
881 ret = -EFAULT;
882 if (copy_from_user(argv, argp, sizeof(argv)))
883 goto out;
884
885 ret = -EINVAL;
886 nsegs = argv[4].v_nmembs;
887 if (argv[4].v_size != argsz[4])
888 goto out;
889
890 /*
891 * argv[4] points to segment numbers this ioctl cleans. We
892 * use kmalloc() for its buffer because the memory used for the
893 * segment numbers is small enough.
894 */
895 kbufs[4] = memdup_array_user((void __user *)(unsigned long)argv[4].v_base,
896 nsegs, sizeof(__u64));
897 if (IS_ERR(kbufs[4])) {
898 ret = PTR_ERR(kbufs[4]);
899 goto out;
900 }
901 nilfs = inode->i_sb->s_fs_info;
902
903 for (n = 0; n < 4; n++) {
904 ret = -EINVAL;
905 if (argv[n].v_size != argsz[n])
906 goto out_free;
907
908 if (argv[n].v_nmembs > nsegs * nilfs->ns_blocks_per_segment)
909 goto out_free;
910
911 if (argv[n].v_nmembs >= UINT_MAX / argv[n].v_size)
912 goto out_free;
913
914 len = argv[n].v_size * argv[n].v_nmembs;
915 base = (void __user *)(unsigned long)argv[n].v_base;
916 if (len == 0) {
917 kbufs[n] = NULL;
918 continue;
919 }
920
921 kbufs[n] = vmalloc(len);
922 if (!kbufs[n]) {
923 ret = -ENOMEM;
924 goto out_free;
925 }
926 if (copy_from_user(kbufs[n], base, len)) {
927 ret = -EFAULT;
928 vfree(kbufs[n]);
929 goto out_free;
930 }
931 }
932
933 /*
934 * nilfs_ioctl_move_blocks() will call nilfs_iget_for_gc(),
935 * which will operates an inode list without blocking.
936 * To protect the list from concurrent operations,
937 * nilfs_ioctl_move_blocks should be atomic operation.
938 */
939 if (test_and_set_bit(THE_NILFS_GC_RUNNING, &nilfs->ns_flags)) {
940 ret = -EBUSY;
941 goto out_free;
942 }
943
944 ret = nilfs_ioctl_move_blocks(inode->i_sb, &argv[0], kbufs[0]);
945 if (ret < 0) {
946 nilfs_err(inode->i_sb,
947 "error %d preparing GC: cannot read source blocks",
948 ret);
949 } else {
950 if (nilfs_sb_need_update(nilfs))
951 set_nilfs_discontinued(nilfs);
952 ret = nilfs_clean_segments(inode->i_sb, argv, kbufs);
953 }
954
955 nilfs_remove_all_gcinodes(nilfs);
956 clear_nilfs_gc_running(nilfs);
957
958out_free:
959 while (--n >= 0)
960 vfree(kbufs[n]);
961 kfree(kbufs[4]);
962out:
963 mnt_drop_write_file(filp);
964 return ret;
965}
966
967/**
968 * nilfs_ioctl_sync - make a checkpoint
969 * @inode: inode object
970 * @filp: file object
971 * @cmd: ioctl's request code
972 * @argp: pointer on argument from userspace
973 *
974 * Description: nilfs_ioctl_sync() function constructs a logical segment
975 * for checkpointing. This function guarantees that all modified data
976 * and metadata are written out to the device when it successfully
977 * returned.
978 *
979 * Return Value: On success, 0 is retured. On errors, one of the following
980 * negative error code is returned.
981 *
982 * %-EROFS - Read only filesystem.
983 *
984 * %-EIO - I/O error
985 *
986 * %-ENOSPC - No space left on device (only in a panic state).
987 *
988 * %-ERESTARTSYS - Interrupted.
989 *
990 * %-ENOMEM - Insufficient memory available.
991 *
992 * %-EFAULT - Failure during execution of requested operation.
993 */
994static int nilfs_ioctl_sync(struct inode *inode, struct file *filp,
995 unsigned int cmd, void __user *argp)
996{
997 __u64 cno;
998 int ret;
999 struct the_nilfs *nilfs;
1000
1001 ret = nilfs_construct_segment(inode->i_sb);
1002 if (ret < 0)
1003 return ret;
1004
1005 nilfs = inode->i_sb->s_fs_info;
1006 ret = nilfs_flush_device(nilfs);
1007 if (ret < 0)
1008 return ret;
1009
1010 if (argp != NULL) {
1011 down_read(&nilfs->ns_segctor_sem);
1012 cno = nilfs->ns_cno - 1;
1013 up_read(&nilfs->ns_segctor_sem);
1014 if (copy_to_user(argp, &cno, sizeof(cno)))
1015 return -EFAULT;
1016 }
1017 return 0;
1018}
1019
1020/**
1021 * nilfs_ioctl_resize - resize NILFS2 volume
1022 * @inode: inode object
1023 * @filp: file object
1024 * @argp: pointer on argument from userspace
1025 *
1026 * Return Value: On success, 0 is returned or error code, otherwise.
1027 */
1028static int nilfs_ioctl_resize(struct inode *inode, struct file *filp,
1029 void __user *argp)
1030{
1031 __u64 newsize;
1032 int ret = -EPERM;
1033
1034 if (!capable(CAP_SYS_ADMIN))
1035 goto out;
1036
1037 ret = mnt_want_write_file(filp);
1038 if (ret)
1039 goto out;
1040
1041 ret = -EFAULT;
1042 if (copy_from_user(&newsize, argp, sizeof(newsize)))
1043 goto out_drop_write;
1044
1045 ret = nilfs_resize_fs(inode->i_sb, newsize);
1046
1047out_drop_write:
1048 mnt_drop_write_file(filp);
1049out:
1050 return ret;
1051}
1052
1053/**
1054 * nilfs_ioctl_trim_fs() - trim ioctl handle function
1055 * @inode: inode object
1056 * @argp: pointer on argument from userspace
1057 *
1058 * Description: nilfs_ioctl_trim_fs is the FITRIM ioctl handle function. It
1059 * checks the arguments from userspace and calls nilfs_sufile_trim_fs, which
1060 * performs the actual trim operation.
1061 *
1062 * Return Value: On success, 0 is returned or negative error code, otherwise.
1063 */
1064static int nilfs_ioctl_trim_fs(struct inode *inode, void __user *argp)
1065{
1066 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
1067 struct fstrim_range range;
1068 int ret;
1069
1070 if (!capable(CAP_SYS_ADMIN))
1071 return -EPERM;
1072
1073 if (!bdev_max_discard_sectors(nilfs->ns_bdev))
1074 return -EOPNOTSUPP;
1075
1076 if (copy_from_user(&range, argp, sizeof(range)))
1077 return -EFAULT;
1078
1079 range.minlen = max_t(u64, range.minlen,
1080 bdev_discard_granularity(nilfs->ns_bdev));
1081
1082 down_read(&nilfs->ns_segctor_sem);
1083 ret = nilfs_sufile_trim_fs(nilfs->ns_sufile, &range);
1084 up_read(&nilfs->ns_segctor_sem);
1085
1086 if (ret < 0)
1087 return ret;
1088
1089 if (copy_to_user(argp, &range, sizeof(range)))
1090 return -EFAULT;
1091
1092 return 0;
1093}
1094
1095/**
1096 * nilfs_ioctl_set_alloc_range - limit range of segments to be allocated
1097 * @inode: inode object
1098 * @argp: pointer on argument from userspace
1099 *
1100 * Description: nilfs_ioctl_set_alloc_range() function defines lower limit
1101 * of segments in bytes and upper limit of segments in bytes.
1102 * The NILFS_IOCTL_SET_ALLOC_RANGE is used by nilfs_resize utility.
1103 *
1104 * Return Value: On success, 0 is returned or error code, otherwise.
1105 */
1106static int nilfs_ioctl_set_alloc_range(struct inode *inode, void __user *argp)
1107{
1108 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
1109 __u64 range[2];
1110 __u64 minseg, maxseg;
1111 unsigned long segbytes;
1112 int ret = -EPERM;
1113
1114 if (!capable(CAP_SYS_ADMIN))
1115 goto out;
1116
1117 ret = -EFAULT;
1118 if (copy_from_user(range, argp, sizeof(__u64[2])))
1119 goto out;
1120
1121 ret = -ERANGE;
1122 if (range[1] > bdev_nr_bytes(inode->i_sb->s_bdev))
1123 goto out;
1124
1125 segbytes = nilfs->ns_blocks_per_segment * nilfs->ns_blocksize;
1126
1127 minseg = range[0] + segbytes - 1;
1128 minseg = div64_ul(minseg, segbytes);
1129
1130 if (range[1] < 4096)
1131 goto out;
1132
1133 maxseg = NILFS_SB2_OFFSET_BYTES(range[1]);
1134 if (maxseg < segbytes)
1135 goto out;
1136
1137 maxseg = div64_ul(maxseg, segbytes);
1138 maxseg--;
1139
1140 ret = nilfs_sufile_set_alloc_range(nilfs->ns_sufile, minseg, maxseg);
1141out:
1142 return ret;
1143}
1144
1145/**
1146 * nilfs_ioctl_get_info - wrapping function of get metadata info
1147 * @inode: inode object
1148 * @filp: file object
1149 * @cmd: ioctl's request code
1150 * @argp: pointer on argument from userspace
1151 * @membsz: size of an item in bytes
1152 * @dofunc: concrete function of getting metadata info
1153 *
1154 * Description: nilfs_ioctl_get_info() gets metadata info by means of
1155 * calling dofunc() function.
1156 *
1157 * Return Value: On success, 0 is returned and requested metadata info
1158 * is copied into userspace. On error, one of the following
1159 * negative error codes is returned.
1160 *
1161 * %-EINVAL - Invalid arguments from userspace.
1162 *
1163 * %-ENOMEM - Insufficient amount of memory available.
1164 *
1165 * %-EFAULT - Failure during execution of requested operation.
1166 */
1167static int nilfs_ioctl_get_info(struct inode *inode, struct file *filp,
1168 unsigned int cmd, void __user *argp,
1169 size_t membsz,
1170 ssize_t (*dofunc)(struct the_nilfs *,
1171 __u64 *, int,
1172 void *, size_t, size_t))
1173
1174{
1175 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
1176 struct nilfs_argv argv;
1177 int ret;
1178
1179 if (copy_from_user(&argv, argp, sizeof(argv)))
1180 return -EFAULT;
1181
1182 if (argv.v_size < membsz)
1183 return -EINVAL;
1184
1185 ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), dofunc);
1186 if (ret < 0)
1187 return ret;
1188
1189 if (copy_to_user(argp, &argv, sizeof(argv)))
1190 ret = -EFAULT;
1191 return ret;
1192}
1193
1194/**
1195 * nilfs_ioctl_set_suinfo - set segment usage info
1196 * @inode: inode object
1197 * @filp: file object
1198 * @cmd: ioctl's request code
1199 * @argp: pointer on argument from userspace
1200 *
1201 * Description: Expects an array of nilfs_suinfo_update structures
1202 * encapsulated in nilfs_argv and updates the segment usage info
1203 * according to the flags in nilfs_suinfo_update.
1204 *
1205 * Return Value: On success, 0 is returned. On error, one of the
1206 * following negative error codes is returned.
1207 *
1208 * %-EPERM - Not enough permissions
1209 *
1210 * %-EFAULT - Error copying input data
1211 *
1212 * %-EIO - I/O error.
1213 *
1214 * %-ENOMEM - Insufficient amount of memory available.
1215 *
1216 * %-EINVAL - Invalid values in input (segment number, flags or nblocks)
1217 */
1218static int nilfs_ioctl_set_suinfo(struct inode *inode, struct file *filp,
1219 unsigned int cmd, void __user *argp)
1220{
1221 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
1222 struct nilfs_transaction_info ti;
1223 struct nilfs_argv argv;
1224 size_t len;
1225 void __user *base;
1226 void *kbuf;
1227 int ret;
1228
1229 if (!capable(CAP_SYS_ADMIN))
1230 return -EPERM;
1231
1232 ret = mnt_want_write_file(filp);
1233 if (ret)
1234 return ret;
1235
1236 ret = -EFAULT;
1237 if (copy_from_user(&argv, argp, sizeof(argv)))
1238 goto out;
1239
1240 ret = -EINVAL;
1241 if (argv.v_size < sizeof(struct nilfs_suinfo_update))
1242 goto out;
1243
1244 if (argv.v_nmembs > nilfs->ns_nsegments)
1245 goto out;
1246
1247 if (argv.v_nmembs >= UINT_MAX / argv.v_size)
1248 goto out;
1249
1250 len = argv.v_size * argv.v_nmembs;
1251 if (!len) {
1252 ret = 0;
1253 goto out;
1254 }
1255
1256 base = (void __user *)(unsigned long)argv.v_base;
1257 kbuf = vmalloc(len);
1258 if (!kbuf) {
1259 ret = -ENOMEM;
1260 goto out;
1261 }
1262
1263 if (copy_from_user(kbuf, base, len)) {
1264 ret = -EFAULT;
1265 goto out_free;
1266 }
1267
1268 nilfs_transaction_begin(inode->i_sb, &ti, 0);
1269 ret = nilfs_sufile_set_suinfo(nilfs->ns_sufile, kbuf, argv.v_size,
1270 argv.v_nmembs);
1271 if (unlikely(ret < 0))
1272 nilfs_transaction_abort(inode->i_sb);
1273 else
1274 nilfs_transaction_commit(inode->i_sb); /* never fails */
1275
1276out_free:
1277 vfree(kbuf);
1278out:
1279 mnt_drop_write_file(filp);
1280 return ret;
1281}
1282
1283/**
1284 * nilfs_ioctl_get_fslabel - get the volume name of the file system
1285 * @sb: super block instance
1286 * @argp: pointer to userspace memory where the volume name should be stored
1287 *
1288 * Return: 0 on success, %-EFAULT if copying to userspace memory fails.
1289 */
1290static int nilfs_ioctl_get_fslabel(struct super_block *sb, void __user *argp)
1291{
1292 struct the_nilfs *nilfs = sb->s_fs_info;
1293 char label[NILFS_MAX_VOLUME_NAME + 1];
1294
1295 BUILD_BUG_ON(NILFS_MAX_VOLUME_NAME >= FSLABEL_MAX);
1296
1297 down_read(&nilfs->ns_sem);
1298 memtostr_pad(label, nilfs->ns_sbp[0]->s_volume_name);
1299 up_read(&nilfs->ns_sem);
1300
1301 if (copy_to_user(argp, label, sizeof(label)))
1302 return -EFAULT;
1303 return 0;
1304}
1305
1306/**
1307 * nilfs_ioctl_set_fslabel - set the volume name of the file system
1308 * @sb: super block instance
1309 * @filp: file object
1310 * @argp: pointer to userspace memory that contains the volume name
1311 *
1312 * Return: 0 on success, or the following negative error code on failure.
1313 * * %-EFAULT - Error copying input data.
1314 * * %-EINVAL - Label length exceeds record size in superblock.
1315 * * %-EIO - I/O error.
1316 * * %-EPERM - Operation not permitted (insufficient permissions).
1317 * * %-EROFS - Read only file system.
1318 */
1319static int nilfs_ioctl_set_fslabel(struct super_block *sb, struct file *filp,
1320 void __user *argp)
1321{
1322 char label[NILFS_MAX_VOLUME_NAME + 1];
1323 struct the_nilfs *nilfs = sb->s_fs_info;
1324 struct nilfs_super_block **sbp;
1325 size_t len;
1326 int ret;
1327
1328 if (!capable(CAP_SYS_ADMIN))
1329 return -EPERM;
1330
1331 ret = mnt_want_write_file(filp);
1332 if (ret)
1333 return ret;
1334
1335 if (copy_from_user(label, argp, NILFS_MAX_VOLUME_NAME + 1)) {
1336 ret = -EFAULT;
1337 goto out_drop_write;
1338 }
1339
1340 len = strnlen(label, NILFS_MAX_VOLUME_NAME + 1);
1341 if (len > NILFS_MAX_VOLUME_NAME) {
1342 nilfs_err(sb, "unable to set label with more than %zu bytes",
1343 NILFS_MAX_VOLUME_NAME);
1344 ret = -EINVAL;
1345 goto out_drop_write;
1346 }
1347
1348 down_write(&nilfs->ns_sem);
1349 sbp = nilfs_prepare_super(sb, false);
1350 if (unlikely(!sbp)) {
1351 ret = -EIO;
1352 goto out_unlock;
1353 }
1354
1355 strtomem_pad(sbp[0]->s_volume_name, label, 0);
1356 if (sbp[1])
1357 strtomem_pad(sbp[1]->s_volume_name, label, 0);
1358
1359 ret = nilfs_commit_super(sb, NILFS_SB_COMMIT_ALL);
1360
1361out_unlock:
1362 up_write(&nilfs->ns_sem);
1363out_drop_write:
1364 mnt_drop_write_file(filp);
1365 return ret;
1366}
1367
1368long nilfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1369{
1370 struct inode *inode = file_inode(filp);
1371 void __user *argp = (void __user *)arg;
1372
1373 switch (cmd) {
1374 case FS_IOC_GETVERSION:
1375 return nilfs_ioctl_getversion(inode, argp);
1376 case NILFS_IOCTL_CHANGE_CPMODE:
1377 return nilfs_ioctl_change_cpmode(inode, filp, cmd, argp);
1378 case NILFS_IOCTL_DELETE_CHECKPOINT:
1379 return nilfs_ioctl_delete_checkpoint(inode, filp, cmd, argp);
1380 case NILFS_IOCTL_GET_CPINFO:
1381 return nilfs_ioctl_get_info(inode, filp, cmd, argp,
1382 sizeof(struct nilfs_cpinfo),
1383 nilfs_ioctl_do_get_cpinfo);
1384 case NILFS_IOCTL_GET_CPSTAT:
1385 return nilfs_ioctl_get_cpstat(inode, filp, cmd, argp);
1386 case NILFS_IOCTL_GET_SUINFO:
1387 return nilfs_ioctl_get_info(inode, filp, cmd, argp,
1388 sizeof(struct nilfs_suinfo),
1389 nilfs_ioctl_do_get_suinfo);
1390 case NILFS_IOCTL_SET_SUINFO:
1391 return nilfs_ioctl_set_suinfo(inode, filp, cmd, argp);
1392 case NILFS_IOCTL_GET_SUSTAT:
1393 return nilfs_ioctl_get_sustat(inode, filp, cmd, argp);
1394 case NILFS_IOCTL_GET_VINFO:
1395 return nilfs_ioctl_get_info(inode, filp, cmd, argp,
1396 sizeof(struct nilfs_vinfo),
1397 nilfs_ioctl_do_get_vinfo);
1398 case NILFS_IOCTL_GET_BDESCS:
1399 return nilfs_ioctl_get_bdescs(inode, filp, cmd, argp);
1400 case NILFS_IOCTL_CLEAN_SEGMENTS:
1401 return nilfs_ioctl_clean_segments(inode, filp, cmd, argp);
1402 case NILFS_IOCTL_SYNC:
1403 return nilfs_ioctl_sync(inode, filp, cmd, argp);
1404 case NILFS_IOCTL_RESIZE:
1405 return nilfs_ioctl_resize(inode, filp, argp);
1406 case NILFS_IOCTL_SET_ALLOC_RANGE:
1407 return nilfs_ioctl_set_alloc_range(inode, argp);
1408 case FITRIM:
1409 return nilfs_ioctl_trim_fs(inode, argp);
1410 case FS_IOC_GETFSLABEL:
1411 return nilfs_ioctl_get_fslabel(inode->i_sb, argp);
1412 case FS_IOC_SETFSLABEL:
1413 return nilfs_ioctl_set_fslabel(inode->i_sb, filp, argp);
1414 default:
1415 return -ENOTTY;
1416 }
1417}
1418
1419#ifdef CONFIG_COMPAT
1420long nilfs_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1421{
1422 switch (cmd) {
1423 case FS_IOC32_GETVERSION:
1424 cmd = FS_IOC_GETVERSION;
1425 break;
1426 case NILFS_IOCTL_CHANGE_CPMODE:
1427 case NILFS_IOCTL_DELETE_CHECKPOINT:
1428 case NILFS_IOCTL_GET_CPINFO:
1429 case NILFS_IOCTL_GET_CPSTAT:
1430 case NILFS_IOCTL_GET_SUINFO:
1431 case NILFS_IOCTL_SET_SUINFO:
1432 case NILFS_IOCTL_GET_SUSTAT:
1433 case NILFS_IOCTL_GET_VINFO:
1434 case NILFS_IOCTL_GET_BDESCS:
1435 case NILFS_IOCTL_CLEAN_SEGMENTS:
1436 case NILFS_IOCTL_SYNC:
1437 case NILFS_IOCTL_RESIZE:
1438 case NILFS_IOCTL_SET_ALLOC_RANGE:
1439 case FITRIM:
1440 case FS_IOC_GETFSLABEL:
1441 case FS_IOC_SETFSLABEL:
1442 break;
1443 default:
1444 return -ENOIOCTLCMD;
1445 }
1446 return nilfs_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
1447}
1448#endif