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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 <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. If successful,
37 * the requested metadata information is copied to userspace memory.
38 *
39 * Return: 0 on success, or one of the following negative error codes on
40 * failure:
41 * * %-EFAULT - Failure during execution of requested operation.
42 * * %-EINVAL - Invalid arguments from userspace.
43 * * %-ENOMEM - Insufficient memory available.
44 */
45static int nilfs_ioctl_wrap_copy(struct the_nilfs *nilfs,
46 struct nilfs_argv *argv, int dir,
47 ssize_t (*dofunc)(struct the_nilfs *,
48 __u64 *, int,
49 void *, size_t, size_t))
50{
51 void *buf;
52 void __user *base = u64_to_user_ptr(argv->v_base);
53 size_t maxmembs, total, n;
54 ssize_t nr;
55 int ret, i;
56 __u64 pos, ppos;
57
58 if (argv->v_nmembs == 0)
59 return 0;
60
61 if ((size_t)argv->v_size > PAGE_SIZE)
62 return -EINVAL;
63
64 /*
65 * Reject pairs of a start item position (argv->v_index) and a
66 * total count (argv->v_nmembs) which leads position 'pos' to
67 * overflow by the increment at the end of the loop.
68 */
69 if (argv->v_index > ~(__u64)0 - argv->v_nmembs)
70 return -EINVAL;
71
72 buf = kzalloc(PAGE_SIZE, GFP_NOFS);
73 if (unlikely(!buf))
74 return -ENOMEM;
75 maxmembs = PAGE_SIZE / argv->v_size;
76
77 ret = 0;
78 total = 0;
79 pos = argv->v_index;
80 for (i = 0; i < argv->v_nmembs; i += n) {
81 n = (argv->v_nmembs - i < maxmembs) ?
82 argv->v_nmembs - i : maxmembs;
83 if ((dir & _IOC_WRITE) &&
84 copy_from_user(buf, base + argv->v_size * i,
85 argv->v_size * n)) {
86 ret = -EFAULT;
87 break;
88 }
89 ppos = pos;
90 nr = dofunc(nilfs, &pos, argv->v_flags, buf, argv->v_size,
91 n);
92 if (nr < 0) {
93 ret = nr;
94 break;
95 }
96 if ((dir & _IOC_READ) &&
97 copy_to_user(base + argv->v_size * i, buf,
98 argv->v_size * nr)) {
99 ret = -EFAULT;
100 break;
101 }
102 total += nr;
103 if ((size_t)nr < n)
104 break;
105 if (pos == ppos)
106 pos += n;
107 }
108 argv->v_nmembs = total;
109
110 kfree(buf);
111 return ret;
112}
113
114/**
115 * nilfs_fileattr_get - retrieve miscellaneous file attributes
116 * @dentry: the object to retrieve from
117 * @fa: fileattr pointer
118 *
119 * Return: always 0 as success.
120 */
121int nilfs_fileattr_get(struct dentry *dentry, struct file_kattr *fa)
122{
123 struct inode *inode = d_inode(dentry);
124
125 fileattr_fill_flags(fa, NILFS_I(inode)->i_flags & FS_FL_USER_VISIBLE);
126
127 return 0;
128}
129
130/**
131 * nilfs_fileattr_set - change miscellaneous file attributes
132 * @idmap: idmap of the mount
133 * @dentry: the object to change
134 * @fa: fileattr pointer
135 *
136 * Return: 0 on success, or a negative error code on failure.
137 */
138int nilfs_fileattr_set(const struct mnt_idmap *idmap,
139 struct dentry *dentry, struct file_kattr *fa)
140{
141 struct inode *inode = d_inode(dentry);
142 struct nilfs_transaction_info ti;
143 unsigned int flags, oldflags;
144 int ret;
145
146 if (fileattr_has_fsx(fa))
147 return -EOPNOTSUPP;
148
149 flags = nilfs_mask_flags(inode->i_mode, fa->flags);
150
151 ret = nilfs_transaction_begin(inode->i_sb, &ti, 0);
152 if (ret)
153 return ret;
154
155 oldflags = NILFS_I(inode)->i_flags & ~FS_FL_USER_MODIFIABLE;
156 NILFS_I(inode)->i_flags = oldflags | (flags & FS_FL_USER_MODIFIABLE);
157
158 nilfs_set_inode_flags(inode);
159 inode_set_ctime_current(inode);
160 if (IS_SYNC(inode))
161 nilfs_set_transaction_flag(NILFS_TI_SYNC);
162
163 nilfs_mark_inode_dirty(inode);
164 return nilfs_transaction_commit(inode->i_sb);
165}
166
167/**
168 * nilfs_ioctl_getversion - get info about a file's version (generation number)
169 * @inode: inode object
170 * @argp: userspace memory where the generation number of @inode is stored
171 *
172 * Return: 0 on success, or %-EFAULT on error.
173 */
174static int nilfs_ioctl_getversion(struct inode *inode, void __user *argp)
175{
176 return put_user(inode->i_generation, (int __user *)argp);
177}
178
179/**
180 * nilfs_ioctl_change_cpmode - change checkpoint mode (checkpoint/snapshot)
181 * @inode: inode object
182 * @filp: file object
183 * @cmd: ioctl's request code
184 * @argp: pointer on argument from userspace
185 *
186 * Description: nilfs_ioctl_change_cpmode() function changes mode of
187 * given checkpoint between checkpoint and snapshot state. This ioctl
188 * is used in chcp and mkcp utilities.
189 *
190 * Return: 0 on success, or one of the following negative error codes on
191 * failure:
192 * %-EFAULT - Failure during checkpoint mode changing.
193 * %-EPERM - Operation not permitted.
194 */
195static int nilfs_ioctl_change_cpmode(struct inode *inode, struct file *filp,
196 unsigned int cmd, void __user *argp)
197{
198 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
199 struct nilfs_transaction_info ti;
200 struct nilfs_cpmode cpmode;
201 int ret;
202
203 if (!capable(CAP_SYS_ADMIN))
204 return -EPERM;
205
206 ret = mnt_want_write_file(filp);
207 if (ret)
208 return ret;
209
210 ret = -EFAULT;
211 if (copy_from_user(&cpmode, argp, sizeof(cpmode)))
212 goto out;
213
214 mutex_lock(&nilfs->ns_snapshot_mount_mutex);
215
216 nilfs_transaction_begin(inode->i_sb, &ti, 0);
217 ret = nilfs_cpfile_change_cpmode(
218 nilfs->ns_cpfile, cpmode.cm_cno, cpmode.cm_mode);
219 if (unlikely(ret < 0))
220 nilfs_transaction_abort(inode->i_sb);
221 else
222 nilfs_transaction_commit(inode->i_sb); /* never fails */
223
224 mutex_unlock(&nilfs->ns_snapshot_mount_mutex);
225out:
226 mnt_drop_write_file(filp);
227 return ret;
228}
229
230/**
231 * nilfs_ioctl_delete_checkpoint - remove checkpoint
232 * @inode: inode object
233 * @filp: file object
234 * @cmd: ioctl's request code
235 * @argp: pointer on argument from userspace
236 *
237 * Description: nilfs_ioctl_delete_checkpoint() function removes
238 * checkpoint from NILFS2 file system. This ioctl is used in rmcp
239 * utility.
240 *
241 * Return: 0 on success, or one of the following negative error codes on
242 * failure:
243 * %-EFAULT - Failure during checkpoint removing.
244 * %-EPERM - Operation not permitted.
245 */
246static int
247nilfs_ioctl_delete_checkpoint(struct inode *inode, struct file *filp,
248 unsigned int cmd, void __user *argp)
249{
250 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
251 struct nilfs_transaction_info ti;
252 __u64 cno;
253 int ret;
254
255 if (!capable(CAP_SYS_ADMIN))
256 return -EPERM;
257
258 ret = mnt_want_write_file(filp);
259 if (ret)
260 return ret;
261
262 ret = -EFAULT;
263 if (copy_from_user(&cno, argp, sizeof(cno)))
264 goto out;
265
266 nilfs_transaction_begin(inode->i_sb, &ti, 0);
267 ret = nilfs_cpfile_delete_checkpoint(nilfs->ns_cpfile, cno);
268 if (unlikely(ret < 0))
269 nilfs_transaction_abort(inode->i_sb);
270 else
271 nilfs_transaction_commit(inode->i_sb); /* never fails */
272out:
273 mnt_drop_write_file(filp);
274 return ret;
275}
276
277/**
278 * nilfs_ioctl_do_get_cpinfo - callback method getting info about checkpoints
279 * @nilfs: nilfs object
280 * @posp: pointer on array of checkpoint's numbers
281 * @flags: checkpoint mode (checkpoint or snapshot)
282 * @buf: buffer for storing checkponts' info
283 * @size: size in bytes of one checkpoint info item in array
284 * @nmembs: number of checkpoints in array (numbers and infos)
285 *
286 * Description: nilfs_ioctl_do_get_cpinfo() function returns info about
287 * requested checkpoints. The NILFS_IOCTL_GET_CPINFO ioctl is used in
288 * lscp utility and by nilfs_cleanerd daemon.
289 *
290 * Return: Count of nilfs_cpinfo structures in output buffer.
291 */
292static ssize_t
293nilfs_ioctl_do_get_cpinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
294 void *buf, size_t size, size_t nmembs)
295{
296 int ret;
297
298 down_read(&nilfs->ns_segctor_sem);
299 ret = nilfs_cpfile_get_cpinfo(nilfs->ns_cpfile, posp, flags, buf,
300 size, nmembs);
301 up_read(&nilfs->ns_segctor_sem);
302 return ret;
303}
304
305/**
306 * nilfs_ioctl_get_cpstat - get checkpoints statistics
307 * @inode: inode object
308 * @filp: file object
309 * @cmd: ioctl's request code
310 * @argp: pointer on argument from userspace
311 *
312 * Description: nilfs_ioctl_get_cpstat() returns information about checkpoints.
313 * The NILFS_IOCTL_GET_CPSTAT ioctl is used by lscp, rmcp utilities
314 * and by nilfs_cleanerd daemon. The checkpoint statistics are copied to
315 * the userspace memory pointed to by @argp.
316 *
317 * Return: 0 on success, or one of the following negative error codes on
318 * failure:
319 * * %-EFAULT - Failure during getting checkpoints statistics.
320 * * %-EIO - I/O error.
321 * * %-ENOMEM - Insufficient memory available.
322 */
323static int nilfs_ioctl_get_cpstat(struct inode *inode, struct file *filp,
324 unsigned int cmd, void __user *argp)
325{
326 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
327 struct nilfs_cpstat cpstat;
328 int ret;
329
330 down_read(&nilfs->ns_segctor_sem);
331 ret = nilfs_cpfile_get_stat(nilfs->ns_cpfile, &cpstat);
332 up_read(&nilfs->ns_segctor_sem);
333 if (ret < 0)
334 return ret;
335
336 if (copy_to_user(argp, &cpstat, sizeof(cpstat)))
337 ret = -EFAULT;
338 return ret;
339}
340
341/**
342 * nilfs_ioctl_do_get_suinfo - callback method getting segment usage info
343 * @nilfs: nilfs object
344 * @posp: pointer on array of segment numbers
345 * @flags: *not used*
346 * @buf: buffer for storing suinfo array
347 * @size: size in bytes of one suinfo item in array
348 * @nmembs: count of segment numbers and suinfos in array
349 *
350 * Description: nilfs_ioctl_do_get_suinfo() function returns segment usage
351 * info about requested segments. The NILFS_IOCTL_GET_SUINFO ioctl is used
352 * in lssu, nilfs_resize utilities and by nilfs_cleanerd daemon.
353 *
354 * Return: Count of nilfs_suinfo structures in output buffer on success,
355 * or a negative error code on failure.
356 */
357static ssize_t
358nilfs_ioctl_do_get_suinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
359 void *buf, size_t size, size_t nmembs)
360{
361 int ret;
362
363 down_read(&nilfs->ns_segctor_sem);
364 ret = nilfs_sufile_get_suinfo(nilfs->ns_sufile, *posp, buf, size,
365 nmembs);
366 up_read(&nilfs->ns_segctor_sem);
367 return ret;
368}
369
370/**
371 * nilfs_ioctl_get_sustat - get segment usage statistics
372 * @inode: inode object
373 * @filp: file object
374 * @cmd: ioctl's request code
375 * @argp: pointer on argument from userspace
376 *
377 * Description: nilfs_ioctl_get_sustat() returns segment usage statistics.
378 * The NILFS_IOCTL_GET_SUSTAT ioctl is used in lssu, nilfs_resize utilities
379 * and by nilfs_cleanerd daemon. The requested segment usage information is
380 * copied to the userspace memory pointed to by @argp.
381 *
382 * Return: 0 on success, or one of the following negative error codes on
383 * failure:
384 * * %-EFAULT - Failure during getting segment usage statistics.
385 * * %-EIO - I/O error.
386 * * %-ENOMEM - Insufficient memory available.
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: Count of nilfs_vinfo structures in output buffer on success, or
420 * a negative error code on failure.
421 */
422static ssize_t
423nilfs_ioctl_do_get_vinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
424 void *buf, size_t size, size_t nmembs)
425{
426 int ret;
427
428 down_read(&nilfs->ns_segctor_sem);
429 ret = nilfs_dat_get_vinfo(nilfs->ns_dat, buf, size, nmembs);
430 up_read(&nilfs->ns_segctor_sem);
431 return ret;
432}
433
434/**
435 * nilfs_ioctl_do_get_bdescs - callback method getting disk block descriptors
436 * @nilfs: nilfs object
437 * @posp: *not used*
438 * @flags: *not used*
439 * @buf: buffer for storing array of nilfs_bdesc structures
440 * @size: size in bytes of one bdesc item in array
441 * @nmembs: count of bdescs in array
442 *
443 * Description: nilfs_ioctl_do_get_bdescs() function returns information
444 * about descriptors of disk block numbers. The NILFS_IOCTL_GET_BDESCS ioctl
445 * is used by nilfs_cleanerd daemon.
446 *
447 * Return: Count of nilfs_bdescs structures in output buffer on success, or
448 * a negative error code on failure.
449 */
450static ssize_t
451nilfs_ioctl_do_get_bdescs(struct the_nilfs *nilfs, __u64 *posp, int flags,
452 void *buf, size_t size, size_t nmembs)
453{
454 struct nilfs_bmap *bmap = NILFS_I(nilfs->ns_dat)->i_bmap;
455 struct nilfs_bdesc *bdescs = buf;
456 int ret, i;
457
458 down_read(&nilfs->ns_segctor_sem);
459 for (i = 0; i < nmembs; i++) {
460 ret = nilfs_bmap_lookup_at_level(bmap,
461 bdescs[i].bd_offset,
462 bdescs[i].bd_level + 1,
463 &bdescs[i].bd_blocknr);
464 if (ret < 0) {
465 if (ret != -ENOENT) {
466 up_read(&nilfs->ns_segctor_sem);
467 return ret;
468 }
469 bdescs[i].bd_blocknr = 0;
470 }
471 }
472 up_read(&nilfs->ns_segctor_sem);
473 return nmembs;
474}
475
476/**
477 * nilfs_ioctl_get_bdescs - get disk block descriptors
478 * @inode: inode object
479 * @filp: file object
480 * @cmd: ioctl's request code
481 * @argp: pointer on argument from userspace
482 *
483 * Description: nilfs_ioctl_do_get_bdescs() function returns information
484 * about descriptors of disk block numbers. The NILFS_IOCTL_GET_BDESCS ioctl
485 * is used by nilfs_cleanerd daemon. If successful, disk block descriptors
486 * are copied to userspace pointer @argp.
487 *
488 * Return: 0 on success, or one of the following negative error codes on
489 * failure:
490 * * %-EFAULT - Failure during getting disk block descriptors.
491 * * %-EINVAL - Invalid arguments from userspace.
492 * * %-EIO - I/O error.
493 * * %-ENOMEM - Insufficient memory available.
494 */
495static int nilfs_ioctl_get_bdescs(struct inode *inode, struct file *filp,
496 unsigned int cmd, void __user *argp)
497{
498 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
499 struct nilfs_argv argv;
500 int ret;
501
502 if (copy_from_user(&argv, argp, sizeof(argv)))
503 return -EFAULT;
504
505 if (argv.v_size != sizeof(struct nilfs_bdesc))
506 return -EINVAL;
507
508 ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd),
509 nilfs_ioctl_do_get_bdescs);
510 if (ret < 0)
511 return ret;
512
513 if (copy_to_user(argp, &argv, sizeof(argv)))
514 ret = -EFAULT;
515 return ret;
516}
517
518/**
519 * nilfs_ioctl_move_inode_block - prepare data/node block for moving by GC
520 * @inode: inode object
521 * @vdesc: descriptor of virtual block number
522 * @buffers: list of moving buffers
523 *
524 * Description: nilfs_ioctl_move_inode_block() function registers data/node
525 * buffer in the GC pagecache and submit read request.
526 *
527 * Return: 0 on success, or one of the following negative error codes on
528 * failure:
529 * * %-EEXIST - Block conflict detected.
530 * * %-EINVAL - Invalid virtual block descriptor.
531 * * %-EIO - I/O error.
532 * * %-ENOENT - Requested block doesn't exist.
533 * * %-ENOMEM - Insufficient memory available.
534 */
535static int nilfs_ioctl_move_inode_block(struct inode *inode,
536 struct nilfs_vdesc *vdesc,
537 struct list_head *buffers)
538{
539 struct buffer_head *bh;
540 __u64 limit_blkidx = (__u64)inode->i_sb->s_maxbytes >> inode->i_blkbits;
541 int ret;
542
543 /*
544 * vblocknr 0 is reserved as an invalid pointer. Also, limit_blkidx
545 * ensures that the page index converted from vd_vblocknr never
546 * overflows the page cache limit and respects the architecture's bmap
547 * key width.
548 */
549 if (unlikely(vdesc->vd_vblocknr == 0 ||
550 vdesc->vd_vblocknr >= limit_blkidx))
551 return -EINVAL;
552
553 if (vdesc->vd_flags == 0) {
554 if (unlikely(vdesc->vd_offset >= limit_blkidx))
555 return -EINVAL;
556
557 ret = nilfs_gccache_submit_read_data(
558 inode, vdesc->vd_offset, vdesc->vd_blocknr,
559 vdesc->vd_vblocknr, &bh);
560 } else {
561 ret = nilfs_gccache_submit_read_node(
562 inode, vdesc->vd_blocknr, vdesc->vd_vblocknr, &bh);
563 }
564
565 if (unlikely(ret < 0)) {
566 if (ret == -ENOENT)
567 nilfs_crit(inode->i_sb,
568 "%s: invalid virtual block address (%s): ino=%llu, cno=%llu, offset=%llu, blocknr=%llu, vblocknr=%llu",
569 __func__, vdesc->vd_flags ? "node" : "data",
570 (unsigned long long)vdesc->vd_ino,
571 (unsigned long long)vdesc->vd_cno,
572 (unsigned long long)vdesc->vd_offset,
573 (unsigned long long)vdesc->vd_blocknr,
574 (unsigned long long)vdesc->vd_vblocknr);
575 return ret;
576 }
577 if (unlikely(!list_empty(&bh->b_assoc_buffers))) {
578 nilfs_crit(inode->i_sb,
579 "%s: conflicting %s buffer: ino=%llu, cno=%llu, offset=%llu, blocknr=%llu, vblocknr=%llu",
580 __func__, vdesc->vd_flags ? "node" : "data",
581 (unsigned long long)vdesc->vd_ino,
582 (unsigned long long)vdesc->vd_cno,
583 (unsigned long long)vdesc->vd_offset,
584 (unsigned long long)vdesc->vd_blocknr,
585 (unsigned long long)vdesc->vd_vblocknr);
586 brelse(bh);
587 return -EEXIST;
588 }
589 list_add_tail(&bh->b_assoc_buffers, buffers);
590 return 0;
591}
592
593/**
594 * nilfs_ioctl_move_blocks - move valid inode's blocks during garbage collection
595 * @sb: superblock object
596 * @argv: vector of arguments from userspace
597 * @buf: array of nilfs_vdesc structures
598 *
599 * Description: nilfs_ioctl_move_blocks() function reads valid data/node
600 * blocks that garbage collector specified with the array of nilfs_vdesc
601 * structures and stores them into page caches of GC inodes.
602 *
603 * Return: Number of processed nilfs_vdesc structures on success, or
604 * a negative error code on failure.
605 */
606static int nilfs_ioctl_move_blocks(struct super_block *sb,
607 struct nilfs_argv *argv, void *buf)
608{
609 size_t nmembs = argv->v_nmembs;
610 struct the_nilfs *nilfs = sb->s_fs_info;
611 struct inode *inode;
612 struct nilfs_vdesc *vdesc;
613 struct buffer_head *bh, *n;
614 LIST_HEAD(buffers);
615 u64 ino;
616 __u64 cno;
617 int i, ret;
618
619 for (i = 0, vdesc = buf; i < nmembs; ) {
620 ino = vdesc->vd_ino;
621 cno = vdesc->vd_cno;
622 inode = nilfs_iget_for_gc(sb, ino, cno);
623 if (IS_ERR(inode)) {
624 ret = PTR_ERR(inode);
625 goto failed;
626 }
627 if (list_empty(&NILFS_I(inode)->i_dirty)) {
628 /*
629 * Add the inode to GC inode list. Garbage Collection
630 * is serialized and no two processes manipulate the
631 * list simultaneously.
632 */
633 igrab(inode);
634 list_add(&NILFS_I(inode)->i_dirty,
635 &nilfs->ns_gc_inodes);
636 }
637
638 do {
639 ret = nilfs_ioctl_move_inode_block(inode, vdesc,
640 &buffers);
641 if (unlikely(ret < 0)) {
642 iput(inode);
643 goto failed;
644 }
645 vdesc++;
646 } while (++i < nmembs &&
647 vdesc->vd_ino == ino && vdesc->vd_cno == cno);
648
649 iput(inode); /* The inode still remains in GC inode list */
650 }
651
652 list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) {
653 ret = nilfs_gccache_wait_and_mark_dirty(bh);
654 if (unlikely(ret < 0)) {
655 WARN_ON(ret == -EEXIST);
656 goto failed;
657 }
658 list_del_init(&bh->b_assoc_buffers);
659 brelse(bh);
660 }
661 return nmembs;
662
663 failed:
664 list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) {
665 list_del_init(&bh->b_assoc_buffers);
666 brelse(bh);
667 }
668 return ret;
669}
670
671/**
672 * nilfs_ioctl_delete_checkpoints - delete checkpoints
673 * @nilfs: nilfs object
674 * @argv: vector of arguments from userspace
675 * @buf: array of periods of checkpoints numbers
676 *
677 * Description: nilfs_ioctl_delete_checkpoints() function deletes checkpoints
678 * in the period from p_start to p_end, excluding p_end itself. The checkpoints
679 * which have been already deleted are ignored.
680 *
681 * Return: Number of processed nilfs_period structures on success, or one of
682 * the following negative error codes on failure:
683 * * %-EINVAL - invalid checkpoints.
684 * * %-EIO - I/O error.
685 * * %-ENOMEM - Insufficient memory available.
686 */
687static int nilfs_ioctl_delete_checkpoints(struct the_nilfs *nilfs,
688 struct nilfs_argv *argv, void *buf)
689{
690 size_t nmembs = argv->v_nmembs;
691 struct inode *cpfile = nilfs->ns_cpfile;
692 struct nilfs_period *periods = buf;
693 int ret, i;
694
695 for (i = 0; i < nmembs; i++) {
696 ret = nilfs_cpfile_delete_checkpoints(
697 cpfile, periods[i].p_start, periods[i].p_end);
698 if (ret < 0)
699 return ret;
700 }
701 return nmembs;
702}
703
704/**
705 * nilfs_ioctl_free_vblocknrs - free virtual block numbers
706 * @nilfs: nilfs object
707 * @argv: vector of arguments from userspace
708 * @buf: array of virtual block numbers
709 *
710 * Description: nilfs_ioctl_free_vblocknrs() function frees
711 * the virtual block numbers specified by @buf and @argv->v_nmembs.
712 *
713 * Return: Number of processed virtual block numbers on success, or one of the
714 * following negative error codes on failure:
715 * * %-EIO - I/O error.
716 * * %-ENOENT - Unallocated virtual block number.
717 * * %-ENOMEM - Insufficient memory available.
718 */
719static int nilfs_ioctl_free_vblocknrs(struct the_nilfs *nilfs,
720 struct nilfs_argv *argv, void *buf)
721{
722 size_t nmembs = argv->v_nmembs;
723 int ret;
724
725 ret = nilfs_dat_freev(nilfs->ns_dat, buf, nmembs);
726
727 return (ret < 0) ? ret : nmembs;
728}
729
730/**
731 * nilfs_ioctl_mark_blocks_dirty - mark blocks dirty
732 * @nilfs: nilfs object
733 * @argv: vector of arguments from userspace
734 * @buf: array of block descriptors
735 *
736 * Description: nilfs_ioctl_mark_blocks_dirty() function marks
737 * metadata file or data blocks as dirty.
738 *
739 * Return: Number of processed block descriptors on success, or one of the
740 * following negative error codes on failure:
741 * * %-EIO - I/O error.
742 * * %-ENOENT - Non-existent block (hole block).
743 * * %-ENOMEM - Insufficient memory available.
744 */
745static int nilfs_ioctl_mark_blocks_dirty(struct the_nilfs *nilfs,
746 struct nilfs_argv *argv, void *buf)
747{
748 size_t nmembs = argv->v_nmembs;
749 struct nilfs_bmap *bmap = NILFS_I(nilfs->ns_dat)->i_bmap;
750 struct nilfs_bdesc *bdescs = buf;
751 struct buffer_head *bh;
752 int ret, i;
753
754 for (i = 0; i < nmembs; i++) {
755 /*
756 * bd_oblocknr must never be 0 as block 0
757 * is never a valid GC target block
758 */
759 if (unlikely(!bdescs[i].bd_oblocknr))
760 return -EINVAL;
761 /* XXX: use macro or inline func to check liveness */
762 ret = nilfs_bmap_lookup_at_level(bmap,
763 bdescs[i].bd_offset,
764 bdescs[i].bd_level + 1,
765 &bdescs[i].bd_blocknr);
766 if (ret < 0) {
767 if (ret != -ENOENT)
768 return ret;
769 bdescs[i].bd_blocknr = 0;
770 }
771 if (bdescs[i].bd_blocknr != bdescs[i].bd_oblocknr)
772 /* skip dead block */
773 continue;
774 if (bdescs[i].bd_level == 0) {
775 ret = nilfs_mdt_get_block(nilfs->ns_dat,
776 bdescs[i].bd_offset,
777 false, NULL, &bh);
778 if (unlikely(ret)) {
779 WARN_ON(ret == -ENOENT);
780 return ret;
781 }
782 mark_buffer_dirty(bh);
783 nilfs_mdt_mark_dirty(nilfs->ns_dat);
784 put_bh(bh);
785 } else {
786 ret = nilfs_bmap_mark(bmap, bdescs[i].bd_offset,
787 bdescs[i].bd_level);
788 if (ret < 0) {
789 WARN_ON(ret == -ENOENT);
790 return ret;
791 }
792 }
793 }
794 return nmembs;
795}
796
797int nilfs_ioctl_prepare_clean_segments(struct the_nilfs *nilfs,
798 struct nilfs_argv *argv, void **kbufs)
799{
800 const char *msg;
801 int ret;
802
803 ret = nilfs_ioctl_delete_checkpoints(nilfs, &argv[1], kbufs[1]);
804 if (ret < 0) {
805 /*
806 * can safely abort because checkpoints can be removed
807 * independently.
808 */
809 msg = "cannot delete checkpoints";
810 goto failed;
811 }
812 ret = nilfs_ioctl_free_vblocknrs(nilfs, &argv[2], kbufs[2]);
813 if (ret < 0) {
814 /*
815 * can safely abort because DAT file is updated atomically
816 * using a copy-on-write technique.
817 */
818 msg = "cannot delete virtual blocks from DAT file";
819 goto failed;
820 }
821 ret = nilfs_ioctl_mark_blocks_dirty(nilfs, &argv[3], kbufs[3]);
822 if (ret < 0) {
823 /*
824 * can safely abort because the operation is nondestructive.
825 */
826 msg = "cannot mark copying blocks dirty";
827 goto failed;
828 }
829 return 0;
830
831 failed:
832 nilfs_err(nilfs->ns_sb, "error %d preparing GC: %s", ret, msg);
833 return ret;
834}
835
836/**
837 * nilfs_ioctl_clean_segments - clean segments
838 * @inode: inode object
839 * @filp: file object
840 * @cmd: ioctl's request code
841 * @argp: pointer on argument from userspace
842 *
843 * Description: nilfs_ioctl_clean_segments() function makes garbage
844 * collection operation in the environment of requested parameters
845 * from userspace. The NILFS_IOCTL_CLEAN_SEGMENTS ioctl is used by
846 * nilfs_cleanerd daemon.
847 *
848 * Return: 0 on success, or a negative error code on failure.
849 */
850static int nilfs_ioctl_clean_segments(struct inode *inode, struct file *filp,
851 unsigned int cmd, void __user *argp)
852{
853 struct nilfs_argv argv[5];
854 static const size_t argsz[5] = {
855 sizeof(struct nilfs_vdesc),
856 sizeof(struct nilfs_period),
857 sizeof(__u64),
858 sizeof(struct nilfs_bdesc),
859 sizeof(__u64),
860 };
861 void *kbufs[5];
862 struct the_nilfs *nilfs;
863 size_t len, nsegs;
864 int n, ret;
865
866 if (!capable(CAP_SYS_ADMIN))
867 return -EPERM;
868
869 ret = mnt_want_write_file(filp);
870 if (ret)
871 return ret;
872
873 ret = -EFAULT;
874 if (copy_from_user(argv, argp, sizeof(argv)))
875 goto out;
876
877 ret = -EINVAL;
878 nsegs = argv[4].v_nmembs;
879 if (argv[4].v_size != argsz[4])
880 goto out;
881
882 /*
883 * argv[4] points to segment numbers this ioctl cleans. We
884 * use kmalloc() for its buffer because the memory used for the
885 * segment numbers is small enough.
886 */
887 kbufs[4] = memdup_array_user(u64_to_user_ptr(argv[4].v_base),
888 nsegs, sizeof(__u64));
889 if (IS_ERR(kbufs[4])) {
890 ret = PTR_ERR(kbufs[4]);
891 goto out;
892 }
893 nilfs = inode->i_sb->s_fs_info;
894
895 for (n = 0; n < 4; n++) {
896 ret = -EINVAL;
897 if (argv[n].v_size != argsz[n])
898 goto out_free;
899
900 if (argv[n].v_nmembs > nsegs * nilfs->ns_blocks_per_segment)
901 goto out_free;
902
903 if (argv[n].v_nmembs >= UINT_MAX / argv[n].v_size)
904 goto out_free;
905
906 len = argv[n].v_size * argv[n].v_nmembs;
907 if (len == 0) {
908 kbufs[n] = NULL;
909 continue;
910 }
911
912 kbufs[n] = vmemdup_user(u64_to_user_ptr(argv[n].v_base), len);
913 if (IS_ERR(kbufs[n])) {
914 ret = PTR_ERR(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 kvfree(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: 0 on success, or one of the following negative error codes on
966 * failure:
967 * * %-EFAULT - Failure during execution of requested operation.
968 * * %-EINTR - Interrupted.
969 * * %-EIO - I/O error.
970 * * %-ENOMEM - Insufficient memory available.
971 * * %-ENOSPC - No space left on device (only in a panic state).
972 * * %-EROFS - Read only filesystem.
973 */
974static int nilfs_ioctl_sync(struct inode *inode, struct file *filp,
975 unsigned int cmd, void __user *argp)
976{
977 __u64 cno;
978 int ret;
979 struct the_nilfs *nilfs;
980
981 ret = nilfs_construct_segment(inode->i_sb);
982 if (ret < 0)
983 return ret;
984
985 nilfs = inode->i_sb->s_fs_info;
986 ret = nilfs_flush_device(nilfs);
987 if (ret < 0)
988 return ret;
989
990 if (argp != NULL) {
991 down_read(&nilfs->ns_segctor_sem);
992 cno = nilfs->ns_cno - 1;
993 up_read(&nilfs->ns_segctor_sem);
994 if (copy_to_user(argp, &cno, sizeof(cno)))
995 return -EFAULT;
996 }
997 return 0;
998}
999
1000/**
1001 * nilfs_ioctl_resize - resize NILFS2 volume
1002 * @inode: inode object
1003 * @filp: file object
1004 * @argp: pointer on argument from userspace
1005 *
1006 * Return: 0 on success, or a negative error code on failure.
1007 */
1008static int nilfs_ioctl_resize(struct inode *inode, struct file *filp,
1009 void __user *argp)
1010{
1011 __u64 newsize;
1012 int ret = -EPERM;
1013
1014 if (!capable(CAP_SYS_ADMIN))
1015 goto out;
1016
1017 ret = mnt_want_write_file(filp);
1018 if (ret)
1019 goto out;
1020
1021 ret = -EFAULT;
1022 if (copy_from_user(&newsize, argp, sizeof(newsize)))
1023 goto out_drop_write;
1024
1025 ret = nilfs_resize_fs(inode->i_sb, newsize);
1026
1027out_drop_write:
1028 mnt_drop_write_file(filp);
1029out:
1030 return ret;
1031}
1032
1033/**
1034 * nilfs_ioctl_trim_fs() - trim ioctl handle function
1035 * @inode: inode object
1036 * @argp: pointer on argument from userspace
1037 *
1038 * Description: nilfs_ioctl_trim_fs is the FITRIM ioctl handle function. It
1039 * checks the arguments from userspace and calls nilfs_sufile_trim_fs, which
1040 * performs the actual trim operation.
1041 *
1042 * Return: 0 on success, or a negative error code on failure.
1043 */
1044static int nilfs_ioctl_trim_fs(struct inode *inode, void __user *argp)
1045{
1046 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
1047 struct fstrim_range range;
1048 int ret;
1049
1050 if (!capable(CAP_SYS_ADMIN))
1051 return -EPERM;
1052
1053 if (!bdev_max_discard_sectors(nilfs->ns_bdev))
1054 return -EOPNOTSUPP;
1055
1056 if (copy_from_user(&range, argp, sizeof(range)))
1057 return -EFAULT;
1058
1059 range.minlen = max_t(u64, range.minlen,
1060 bdev_discard_granularity(nilfs->ns_bdev));
1061
1062 down_read(&nilfs->ns_segctor_sem);
1063 ret = nilfs_sufile_trim_fs(nilfs->ns_sufile, &range);
1064 up_read(&nilfs->ns_segctor_sem);
1065
1066 if (ret < 0)
1067 return ret;
1068
1069 if (copy_to_user(argp, &range, sizeof(range)))
1070 return -EFAULT;
1071
1072 return 0;
1073}
1074
1075/**
1076 * nilfs_ioctl_set_alloc_range - limit range of segments to be allocated
1077 * @inode: inode object
1078 * @argp: pointer on argument from userspace
1079 *
1080 * Description: nilfs_ioctl_set_alloc_range() function defines lower limit
1081 * of segments in bytes and upper limit of segments in bytes.
1082 * The NILFS_IOCTL_SET_ALLOC_RANGE is used by nilfs_resize utility.
1083 *
1084 * Return: 0 on success, or a negative error code on failure.
1085 */
1086static int nilfs_ioctl_set_alloc_range(struct inode *inode, void __user *argp)
1087{
1088 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
1089 __u64 range[2];
1090 __u64 minseg, maxseg;
1091 unsigned long segbytes;
1092 int ret = -EPERM;
1093
1094 if (!capable(CAP_SYS_ADMIN))
1095 goto out;
1096
1097 ret = -EFAULT;
1098 if (copy_from_user(range, argp, sizeof(__u64[2])))
1099 goto out;
1100
1101 ret = -ERANGE;
1102 if (range[1] > bdev_nr_bytes(inode->i_sb->s_bdev))
1103 goto out;
1104
1105 segbytes = nilfs->ns_blocks_per_segment * nilfs->ns_blocksize;
1106
1107 minseg = range[0] + segbytes - 1;
1108 minseg = div64_ul(minseg, segbytes);
1109
1110 if (range[1] < 4096)
1111 goto out;
1112
1113 maxseg = NILFS_SB2_OFFSET_BYTES(range[1]);
1114 if (maxseg < segbytes)
1115 goto out;
1116
1117 maxseg = div64_ul(maxseg, segbytes);
1118 maxseg--;
1119
1120 ret = nilfs_sufile_set_alloc_range(nilfs->ns_sufile, minseg, maxseg);
1121out:
1122 return ret;
1123}
1124
1125/**
1126 * nilfs_ioctl_get_info - wrapping function of get metadata info
1127 * @inode: inode object
1128 * @filp: file object
1129 * @cmd: ioctl's request code
1130 * @argp: pointer on argument from userspace
1131 * @membsz: size of an item in bytes
1132 * @dofunc: concrete function of getting metadata info
1133 *
1134 * Description: nilfs_ioctl_get_info() gets metadata info by means of
1135 * calling dofunc() function. The requested metadata information is copied
1136 * to userspace memory @argp.
1137 *
1138 * Return: 0 on success, or one of the following negative error codes on
1139 * failure:
1140 * * %-EFAULT - Failure during execution of requested operation.
1141 * * %-EINVAL - Invalid arguments from userspace.
1142 * * %-EIO - I/O error.
1143 * * %-ENOMEM - Insufficient memory available.
1144 */
1145static int nilfs_ioctl_get_info(struct inode *inode, struct file *filp,
1146 unsigned int cmd, void __user *argp,
1147 size_t membsz,
1148 ssize_t (*dofunc)(struct the_nilfs *,
1149 __u64 *, int,
1150 void *, size_t, size_t))
1151
1152{
1153 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
1154 struct nilfs_argv argv;
1155 int ret;
1156
1157 if (copy_from_user(&argv, argp, sizeof(argv)))
1158 return -EFAULT;
1159
1160 if (argv.v_size < membsz)
1161 return -EINVAL;
1162
1163 ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), dofunc);
1164 if (ret < 0)
1165 return ret;
1166
1167 if (copy_to_user(argp, &argv, sizeof(argv)))
1168 ret = -EFAULT;
1169 return ret;
1170}
1171
1172/**
1173 * nilfs_ioctl_set_suinfo - set segment usage info
1174 * @inode: inode object
1175 * @filp: file object
1176 * @cmd: ioctl's request code
1177 * @argp: pointer on argument from userspace
1178 *
1179 * Description: Expects an array of nilfs_suinfo_update structures
1180 * encapsulated in nilfs_argv and updates the segment usage info
1181 * according to the flags in nilfs_suinfo_update.
1182 *
1183 * Return: 0 on success, or one of the following negative error codes on
1184 * failure:
1185 * * %-EEXIST - Block conflict detected.
1186 * * %-EFAULT - Error copying input data.
1187 * * %-EINVAL - Invalid values in input (segment number, flags or nblocks).
1188 * * %-EIO - I/O error.
1189 * * %-ENOMEM - Insufficient memory available.
1190 * * %-EPERM - Not enough permissions.
1191 */
1192static int nilfs_ioctl_set_suinfo(struct inode *inode, struct file *filp,
1193 unsigned int cmd, void __user *argp)
1194{
1195 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
1196 struct nilfs_transaction_info ti;
1197 struct nilfs_argv argv;
1198 size_t len;
1199 void *kbuf;
1200 int ret;
1201
1202 if (!capable(CAP_SYS_ADMIN))
1203 return -EPERM;
1204
1205 ret = mnt_want_write_file(filp);
1206 if (ret)
1207 return ret;
1208
1209 ret = -EFAULT;
1210 if (copy_from_user(&argv, argp, sizeof(argv)))
1211 goto out;
1212
1213 ret = -EINVAL;
1214 if (argv.v_size < sizeof(struct nilfs_suinfo_update))
1215 goto out;
1216
1217 if (argv.v_nmembs > nilfs->ns_nsegments)
1218 goto out;
1219
1220 if (argv.v_nmembs >= UINT_MAX / argv.v_size)
1221 goto out;
1222
1223 len = argv.v_size * argv.v_nmembs;
1224 if (!len) {
1225 ret = 0;
1226 goto out;
1227 }
1228
1229 kbuf = vmemdup_user(u64_to_user_ptr(argv.v_base), len);
1230 if (IS_ERR(kbuf)) {
1231 ret = PTR_ERR(kbuf);
1232 goto out;
1233 }
1234
1235 nilfs_transaction_begin(inode->i_sb, &ti, 0);
1236 ret = nilfs_sufile_set_suinfo(nilfs->ns_sufile, kbuf, argv.v_size,
1237 argv.v_nmembs);
1238 if (unlikely(ret < 0))
1239 nilfs_transaction_abort(inode->i_sb);
1240 else
1241 nilfs_transaction_commit(inode->i_sb); /* never fails */
1242
1243 kvfree(kbuf);
1244out:
1245 mnt_drop_write_file(filp);
1246 return ret;
1247}
1248
1249/**
1250 * nilfs_ioctl_get_fslabel - get the volume name of the file system
1251 * @sb: super block instance
1252 * @argp: pointer to userspace memory where the volume name should be stored
1253 *
1254 * Return: 0 on success, %-EFAULT if copying to userspace memory fails.
1255 */
1256static int nilfs_ioctl_get_fslabel(struct super_block *sb, void __user *argp)
1257{
1258 struct the_nilfs *nilfs = sb->s_fs_info;
1259 char label[NILFS_MAX_VOLUME_NAME + 1];
1260
1261 BUILD_BUG_ON(NILFS_MAX_VOLUME_NAME >= FSLABEL_MAX);
1262
1263 down_read(&nilfs->ns_sem);
1264 memtostr_pad(label, nilfs->ns_sbp[0]->s_volume_name);
1265 up_read(&nilfs->ns_sem);
1266
1267 if (copy_to_user(argp, label, sizeof(label)))
1268 return -EFAULT;
1269 return 0;
1270}
1271
1272/**
1273 * nilfs_ioctl_set_fslabel - set the volume name of the file system
1274 * @sb: super block instance
1275 * @filp: file object
1276 * @argp: pointer to userspace memory that contains the volume name
1277 *
1278 * Return: 0 on success, or one of the following negative error codes on
1279 * failure:
1280 * * %-EFAULT - Error copying input data.
1281 * * %-EINVAL - Label length exceeds record size in superblock.
1282 * * %-EIO - I/O error.
1283 * * %-EPERM - Operation not permitted (insufficient permissions).
1284 * * %-EROFS - Read only file system.
1285 */
1286static int nilfs_ioctl_set_fslabel(struct super_block *sb, struct file *filp,
1287 void __user *argp)
1288{
1289 char label[NILFS_MAX_VOLUME_NAME + 1];
1290 struct the_nilfs *nilfs = sb->s_fs_info;
1291 struct nilfs_super_block **sbp;
1292 size_t len;
1293 int ret;
1294
1295 if (!capable(CAP_SYS_ADMIN))
1296 return -EPERM;
1297
1298 ret = mnt_want_write_file(filp);
1299 if (ret)
1300 return ret;
1301
1302 if (copy_from_user(label, argp, NILFS_MAX_VOLUME_NAME + 1)) {
1303 ret = -EFAULT;
1304 goto out_drop_write;
1305 }
1306
1307 len = strnlen(label, NILFS_MAX_VOLUME_NAME + 1);
1308 if (len > NILFS_MAX_VOLUME_NAME) {
1309 nilfs_err(sb, "unable to set label with more than %zu bytes",
1310 NILFS_MAX_VOLUME_NAME);
1311 ret = -EINVAL;
1312 goto out_drop_write;
1313 }
1314
1315 down_write(&nilfs->ns_sem);
1316 sbp = nilfs_prepare_super(sb, false);
1317 if (unlikely(!sbp)) {
1318 ret = -EIO;
1319 goto out_unlock;
1320 }
1321
1322 strtomem_pad(sbp[0]->s_volume_name, label, 0);
1323 if (sbp[1])
1324 strtomem_pad(sbp[1]->s_volume_name, label, 0);
1325
1326 ret = nilfs_commit_super(sb, NILFS_SB_COMMIT_ALL);
1327
1328out_unlock:
1329 up_write(&nilfs->ns_sem);
1330out_drop_write:
1331 mnt_drop_write_file(filp);
1332 return ret;
1333}
1334
1335long nilfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1336{
1337 struct inode *inode = file_inode(filp);
1338 void __user *argp = (void __user *)arg;
1339
1340 switch (cmd) {
1341 case FS_IOC_GETVERSION:
1342 return nilfs_ioctl_getversion(inode, argp);
1343 case NILFS_IOCTL_CHANGE_CPMODE:
1344 return nilfs_ioctl_change_cpmode(inode, filp, cmd, argp);
1345 case NILFS_IOCTL_DELETE_CHECKPOINT:
1346 return nilfs_ioctl_delete_checkpoint(inode, filp, cmd, argp);
1347 case NILFS_IOCTL_GET_CPINFO:
1348 return nilfs_ioctl_get_info(inode, filp, cmd, argp,
1349 sizeof(struct nilfs_cpinfo),
1350 nilfs_ioctl_do_get_cpinfo);
1351 case NILFS_IOCTL_GET_CPSTAT:
1352 return nilfs_ioctl_get_cpstat(inode, filp, cmd, argp);
1353 case NILFS_IOCTL_GET_SUINFO:
1354 return nilfs_ioctl_get_info(inode, filp, cmd, argp,
1355 sizeof(struct nilfs_suinfo),
1356 nilfs_ioctl_do_get_suinfo);
1357 case NILFS_IOCTL_SET_SUINFO:
1358 return nilfs_ioctl_set_suinfo(inode, filp, cmd, argp);
1359 case NILFS_IOCTL_GET_SUSTAT:
1360 return nilfs_ioctl_get_sustat(inode, filp, cmd, argp);
1361 case NILFS_IOCTL_GET_VINFO:
1362 return nilfs_ioctl_get_info(inode, filp, cmd, argp,
1363 sizeof(struct nilfs_vinfo),
1364 nilfs_ioctl_do_get_vinfo);
1365 case NILFS_IOCTL_GET_BDESCS:
1366 return nilfs_ioctl_get_bdescs(inode, filp, cmd, argp);
1367 case NILFS_IOCTL_CLEAN_SEGMENTS:
1368 return nilfs_ioctl_clean_segments(inode, filp, cmd, argp);
1369 case NILFS_IOCTL_SYNC:
1370 return nilfs_ioctl_sync(inode, filp, cmd, argp);
1371 case NILFS_IOCTL_RESIZE:
1372 return nilfs_ioctl_resize(inode, filp, argp);
1373 case NILFS_IOCTL_SET_ALLOC_RANGE:
1374 return nilfs_ioctl_set_alloc_range(inode, argp);
1375 case FITRIM:
1376 return nilfs_ioctl_trim_fs(inode, argp);
1377 case FS_IOC_GETFSLABEL:
1378 return nilfs_ioctl_get_fslabel(inode->i_sb, argp);
1379 case FS_IOC_SETFSLABEL:
1380 return nilfs_ioctl_set_fslabel(inode->i_sb, filp, argp);
1381 default:
1382 return -ENOTTY;
1383 }
1384}
1385
1386#ifdef CONFIG_COMPAT
1387long nilfs_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1388{
1389 switch (cmd) {
1390 case FS_IOC32_GETVERSION:
1391 cmd = FS_IOC_GETVERSION;
1392 break;
1393 case NILFS_IOCTL_CHANGE_CPMODE:
1394 case NILFS_IOCTL_DELETE_CHECKPOINT:
1395 case NILFS_IOCTL_GET_CPINFO:
1396 case NILFS_IOCTL_GET_CPSTAT:
1397 case NILFS_IOCTL_GET_SUINFO:
1398 case NILFS_IOCTL_SET_SUINFO:
1399 case NILFS_IOCTL_GET_SUSTAT:
1400 case NILFS_IOCTL_GET_VINFO:
1401 case NILFS_IOCTL_GET_BDESCS:
1402 case NILFS_IOCTL_CLEAN_SEGMENTS:
1403 case NILFS_IOCTL_SYNC:
1404 case NILFS_IOCTL_RESIZE:
1405 case NILFS_IOCTL_SET_ALLOC_RANGE:
1406 case FITRIM:
1407 case FS_IOC_GETFSLABEL:
1408 case FS_IOC_SETFSLABEL:
1409 break;
1410 default:
1411 return -ENOIOCTLCMD;
1412 }
1413 return nilfs_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
1414}
1415#endif