1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * ioctl.c - NILFS ioctl operations.
4 *
5 * Copyright (C) 2007, 2008 Nippon Telegraph and Telephone Corporation.
6 *
7 * Written by Koji Sato.
8 */
9
10 #include <linux/fs.h>
11 #include <linux/wait.h>
12 #include <linux/slab.h>
13 #include <linux/capability.h> /* capable() */
14 #include <linux/uaccess.h> /* copy_from_user(), copy_to_user() */
15 #include <linux/vmalloc.h>
16 #include <linux/compat.h> /* compat_ptr() */
17 #include <linux/mount.h> /* mnt_want_write_file(), mnt_drop_write_file() */
18 #include <linux/buffer_head.h>
19 #include "nilfs.h"
20 #include "segment.h"
21 #include "bmap.h"
22 #include "cpfile.h"
23 #include "sufile.h"
24 #include "dat.h"
25
26 /**
27 * nilfs_ioctl_wrap_copy - wrapping function of get/set metadata info
28 * @nilfs: nilfs object
29 * @argv: vector of arguments from userspace
30 * @dir: set of direction flags
31 * @dofunc: concrete function of get/set metadata info
32 *
33 * Description: nilfs_ioctl_wrap_copy() gets/sets metadata info by means of
34 * calling dofunc() function on the basis of @argv argument.
35 *
36 * Return Value: On success, 0 is returned and requested metadata info
37 * is copied into userspace. On error, one of the following
38 * negative error codes is returned.
39 *
40 * %-EINVAL - Invalid arguments from userspace.
41 *
42 * %-ENOMEM - Insufficient amount of memory available.
43 *
44 * %-EFAULT - Failure during execution of requested operation.
45 */
nilfs_ioctl_wrap_copy(struct the_nilfs * nilfs,struct nilfs_argv * argv,int dir,ssize_t (* dofunc)(struct the_nilfs *,__u64 *,int,void *,size_t,size_t))46 static int nilfs_ioctl_wrap_copy(struct the_nilfs *nilfs,
47 struct nilfs_argv *argv, int dir,
48 ssize_t (*dofunc)(struct the_nilfs *,
49 __u64 *, int,
50 void *, size_t, size_t))
51 {
52 void *buf;
53 void __user *base = (void __user *)(unsigned long)argv->v_base;
54 size_t maxmembs, total, n;
55 ssize_t nr;
56 int ret, i;
57 __u64 pos, ppos;
58
59 if (argv->v_nmembs == 0)
60 return 0;
61
62 if (argv->v_size > PAGE_SIZE)
63 return -EINVAL;
64
65 /*
66 * Reject pairs of a start item position (argv->v_index) and a
67 * total count (argv->v_nmembs) which leads position 'pos' to
68 * overflow by the increment at the end of the loop.
69 */
70 if (argv->v_index > ~(__u64)0 - argv->v_nmembs)
71 return -EINVAL;
72
73 buf = (void *)__get_free_pages(GFP_NOFS, 0);
74 if (unlikely(!buf))
75 return -ENOMEM;
76 maxmembs = PAGE_SIZE / argv->v_size;
77
78 ret = 0;
79 total = 0;
80 pos = argv->v_index;
81 for (i = 0; i < argv->v_nmembs; i += n) {
82 n = (argv->v_nmembs - i < maxmembs) ?
83 argv->v_nmembs - i : maxmembs;
84 if ((dir & _IOC_WRITE) &&
85 copy_from_user(buf, base + argv->v_size * i,
86 argv->v_size * n)) {
87 ret = -EFAULT;
88 break;
89 }
90 ppos = pos;
91 nr = dofunc(nilfs, &pos, argv->v_flags, buf, argv->v_size,
92 n);
93 if (nr < 0) {
94 ret = nr;
95 break;
96 }
97 if ((dir & _IOC_READ) &&
98 copy_to_user(base + argv->v_size * i, buf,
99 argv->v_size * nr)) {
100 ret = -EFAULT;
101 break;
102 }
103 total += nr;
104 if ((size_t)nr < n)
105 break;
106 if (pos == ppos)
107 pos += n;
108 }
109 argv->v_nmembs = total;
110
111 free_pages((unsigned long)buf, 0);
112 return ret;
113 }
114
115 /**
116 * nilfs_ioctl_getflags - ioctl to support lsattr
117 */
nilfs_ioctl_getflags(struct inode * inode,void __user * argp)118 static int nilfs_ioctl_getflags(struct inode *inode, void __user *argp)
119 {
120 unsigned int flags = NILFS_I(inode)->i_flags & FS_FL_USER_VISIBLE;
121
122 return put_user(flags, (int __user *)argp);
123 }
124
125 /**
126 * nilfs_ioctl_setflags - ioctl to support chattr
127 */
nilfs_ioctl_setflags(struct inode * inode,struct file * filp,void __user * argp)128 static int nilfs_ioctl_setflags(struct inode *inode, struct file *filp,
129 void __user *argp)
130 {
131 struct nilfs_transaction_info ti;
132 unsigned int flags, oldflags;
133 int ret;
134
135 if (!inode_owner_or_capable(inode))
136 return -EACCES;
137
138 if (get_user(flags, (int __user *)argp))
139 return -EFAULT;
140
141 ret = mnt_want_write_file(filp);
142 if (ret)
143 return ret;
144
145 flags = nilfs_mask_flags(inode->i_mode, flags);
146
147 inode_lock(inode);
148
149 oldflags = NILFS_I(inode)->i_flags;
150
151 ret = vfs_ioc_setflags_prepare(inode, oldflags, flags);
152 if (ret)
153 goto out;
154
155 ret = nilfs_transaction_begin(inode->i_sb, &ti, 0);
156 if (ret)
157 goto out;
158
159 NILFS_I(inode)->i_flags = (oldflags & ~FS_FL_USER_MODIFIABLE) |
160 (flags & FS_FL_USER_MODIFIABLE);
161
162 nilfs_set_inode_flags(inode);
163 inode->i_ctime = current_time(inode);
164 if (IS_SYNC(inode))
165 nilfs_set_transaction_flag(NILFS_TI_SYNC);
166
167 nilfs_mark_inode_dirty(inode);
168 ret = nilfs_transaction_commit(inode->i_sb);
169 out:
170 inode_unlock(inode);
171 mnt_drop_write_file(filp);
172 return ret;
173 }
174
175 /**
176 * nilfs_ioctl_getversion - get info about a file's version (generation number)
177 */
nilfs_ioctl_getversion(struct inode * inode,void __user * argp)178 static int nilfs_ioctl_getversion(struct inode *inode, void __user *argp)
179 {
180 return put_user(inode->i_generation, (int __user *)argp);
181 }
182
183 /**
184 * nilfs_ioctl_change_cpmode - change checkpoint mode (checkpoint/snapshot)
185 * @inode: inode object
186 * @filp: file object
187 * @cmd: ioctl's request code
188 * @argp: pointer on argument from userspace
189 *
190 * Description: nilfs_ioctl_change_cpmode() function changes mode of
191 * given checkpoint between checkpoint and snapshot state. This ioctl
192 * is used in chcp and mkcp utilities.
193 *
194 * Return Value: On success, 0 is returned and mode of a checkpoint is
195 * changed. On error, one of the following negative error codes
196 * is returned.
197 *
198 * %-EPERM - Operation not permitted.
199 *
200 * %-EFAULT - Failure during checkpoint mode changing.
201 */
nilfs_ioctl_change_cpmode(struct inode * inode,struct file * filp,unsigned int cmd,void __user * argp)202 static int nilfs_ioctl_change_cpmode(struct inode *inode, struct file *filp,
203 unsigned int cmd, void __user *argp)
204 {
205 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
206 struct nilfs_transaction_info ti;
207 struct nilfs_cpmode cpmode;
208 int ret;
209
210 if (!capable(CAP_SYS_ADMIN))
211 return -EPERM;
212
213 ret = mnt_want_write_file(filp);
214 if (ret)
215 return ret;
216
217 ret = -EFAULT;
218 if (copy_from_user(&cpmode, argp, sizeof(cpmode)))
219 goto out;
220
221 mutex_lock(&nilfs->ns_snapshot_mount_mutex);
222
223 nilfs_transaction_begin(inode->i_sb, &ti, 0);
224 ret = nilfs_cpfile_change_cpmode(
225 nilfs->ns_cpfile, cpmode.cm_cno, cpmode.cm_mode);
226 if (unlikely(ret < 0))
227 nilfs_transaction_abort(inode->i_sb);
228 else
229 nilfs_transaction_commit(inode->i_sb); /* never fails */
230
231 mutex_unlock(&nilfs->ns_snapshot_mount_mutex);
232 out:
233 mnt_drop_write_file(filp);
234 return ret;
235 }
236
237 /**
238 * nilfs_ioctl_delete_checkpoint - remove checkpoint
239 * @inode: inode object
240 * @filp: file object
241 * @cmd: ioctl's request code
242 * @argp: pointer on argument from userspace
243 *
244 * Description: nilfs_ioctl_delete_checkpoint() function removes
245 * checkpoint from NILFS2 file system. This ioctl is used in rmcp
246 * utility.
247 *
248 * Return Value: On success, 0 is returned and a checkpoint is
249 * removed. On error, one of the following negative error codes
250 * is returned.
251 *
252 * %-EPERM - Operation not permitted.
253 *
254 * %-EFAULT - Failure during checkpoint removing.
255 */
256 static int
nilfs_ioctl_delete_checkpoint(struct inode * inode,struct file * filp,unsigned int cmd,void __user * argp)257 nilfs_ioctl_delete_checkpoint(struct inode *inode, struct file *filp,
258 unsigned int cmd, void __user *argp)
259 {
260 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
261 struct nilfs_transaction_info ti;
262 __u64 cno;
263 int ret;
264
265 if (!capable(CAP_SYS_ADMIN))
266 return -EPERM;
267
268 ret = mnt_want_write_file(filp);
269 if (ret)
270 return ret;
271
272 ret = -EFAULT;
273 if (copy_from_user(&cno, argp, sizeof(cno)))
274 goto out;
275
276 nilfs_transaction_begin(inode->i_sb, &ti, 0);
277 ret = nilfs_cpfile_delete_checkpoint(nilfs->ns_cpfile, cno);
278 if (unlikely(ret < 0))
279 nilfs_transaction_abort(inode->i_sb);
280 else
281 nilfs_transaction_commit(inode->i_sb); /* never fails */
282 out:
283 mnt_drop_write_file(filp);
284 return ret;
285 }
286
287 /**
288 * nilfs_ioctl_do_get_cpinfo - callback method getting info about checkpoints
289 * @nilfs: nilfs object
290 * @posp: pointer on array of checkpoint's numbers
291 * @flags: checkpoint mode (checkpoint or snapshot)
292 * @buf: buffer for storing checkponts' info
293 * @size: size in bytes of one checkpoint info item in array
294 * @nmembs: number of checkpoints in array (numbers and infos)
295 *
296 * Description: nilfs_ioctl_do_get_cpinfo() function returns info about
297 * requested checkpoints. The NILFS_IOCTL_GET_CPINFO ioctl is used in
298 * lscp utility and by nilfs_cleanerd daemon.
299 *
300 * Return value: count of nilfs_cpinfo structures in output buffer.
301 */
302 static ssize_t
nilfs_ioctl_do_get_cpinfo(struct the_nilfs * nilfs,__u64 * posp,int flags,void * buf,size_t size,size_t nmembs)303 nilfs_ioctl_do_get_cpinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
304 void *buf, size_t size, size_t nmembs)
305 {
306 int ret;
307
308 down_read(&nilfs->ns_segctor_sem);
309 ret = nilfs_cpfile_get_cpinfo(nilfs->ns_cpfile, posp, flags, buf,
310 size, nmembs);
311 up_read(&nilfs->ns_segctor_sem);
312 return ret;
313 }
314
315 /**
316 * nilfs_ioctl_get_cpstat - get checkpoints statistics
317 * @inode: inode object
318 * @filp: file object
319 * @cmd: ioctl's request code
320 * @argp: pointer on argument from userspace
321 *
322 * Description: nilfs_ioctl_get_cpstat() returns information about checkpoints.
323 * The NILFS_IOCTL_GET_CPSTAT ioctl is used by lscp, rmcp utilities
324 * and by nilfs_cleanerd daemon.
325 *
326 * Return Value: On success, 0 is returned, and checkpoints information is
327 * copied into userspace pointer @argp. On error, one of the following
328 * negative error codes is returned.
329 *
330 * %-EIO - I/O error.
331 *
332 * %-ENOMEM - Insufficient amount of memory available.
333 *
334 * %-EFAULT - Failure during getting checkpoints statistics.
335 */
nilfs_ioctl_get_cpstat(struct inode * inode,struct file * filp,unsigned int cmd,void __user * argp)336 static int nilfs_ioctl_get_cpstat(struct inode *inode, struct file *filp,
337 unsigned int cmd, void __user *argp)
338 {
339 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
340 struct nilfs_cpstat cpstat;
341 int ret;
342
343 down_read(&nilfs->ns_segctor_sem);
344 ret = nilfs_cpfile_get_stat(nilfs->ns_cpfile, &cpstat);
345 up_read(&nilfs->ns_segctor_sem);
346 if (ret < 0)
347 return ret;
348
349 if (copy_to_user(argp, &cpstat, sizeof(cpstat)))
350 ret = -EFAULT;
351 return ret;
352 }
353
354 /**
355 * nilfs_ioctl_do_get_suinfo - callback method getting segment usage info
356 * @nilfs: nilfs object
357 * @posp: pointer on array of segment numbers
358 * @flags: *not used*
359 * @buf: buffer for storing suinfo array
360 * @size: size in bytes of one suinfo item in array
361 * @nmembs: count of segment numbers and suinfos in array
362 *
363 * Description: nilfs_ioctl_do_get_suinfo() function returns segment usage
364 * info about requested segments. The NILFS_IOCTL_GET_SUINFO ioctl is used
365 * in lssu, nilfs_resize utilities and by nilfs_cleanerd daemon.
366 *
367 * Return value: count of nilfs_suinfo structures in output buffer.
368 */
369 static ssize_t
nilfs_ioctl_do_get_suinfo(struct the_nilfs * nilfs,__u64 * posp,int flags,void * buf,size_t size,size_t nmembs)370 nilfs_ioctl_do_get_suinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
371 void *buf, size_t size, size_t nmembs)
372 {
373 int ret;
374
375 down_read(&nilfs->ns_segctor_sem);
376 ret = nilfs_sufile_get_suinfo(nilfs->ns_sufile, *posp, buf, size,
377 nmembs);
378 up_read(&nilfs->ns_segctor_sem);
379 return ret;
380 }
381
382 /**
383 * nilfs_ioctl_get_sustat - get segment usage statistics
384 * @inode: inode object
385 * @filp: file object
386 * @cmd: ioctl's request code
387 * @argp: pointer on argument from userspace
388 *
389 * Description: nilfs_ioctl_get_sustat() returns segment usage statistics.
390 * The NILFS_IOCTL_GET_SUSTAT ioctl is used in lssu, nilfs_resize utilities
391 * and by nilfs_cleanerd daemon.
392 *
393 * Return Value: On success, 0 is returned, and segment usage information is
394 * copied into userspace pointer @argp. On error, one of the following
395 * negative error codes is returned.
396 *
397 * %-EIO - I/O error.
398 *
399 * %-ENOMEM - Insufficient amount of memory available.
400 *
401 * %-EFAULT - Failure during getting segment usage statistics.
402 */
nilfs_ioctl_get_sustat(struct inode * inode,struct file * filp,unsigned int cmd,void __user * argp)403 static int nilfs_ioctl_get_sustat(struct inode *inode, struct file *filp,
404 unsigned int cmd, void __user *argp)
405 {
406 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
407 struct nilfs_sustat sustat;
408 int ret;
409
410 down_read(&nilfs->ns_segctor_sem);
411 ret = nilfs_sufile_get_stat(nilfs->ns_sufile, &sustat);
412 up_read(&nilfs->ns_segctor_sem);
413 if (ret < 0)
414 return ret;
415
416 if (copy_to_user(argp, &sustat, sizeof(sustat)))
417 ret = -EFAULT;
418 return ret;
419 }
420
421 /**
422 * nilfs_ioctl_do_get_vinfo - callback method getting virtual blocks info
423 * @nilfs: nilfs object
424 * @posp: *not used*
425 * @flags: *not used*
426 * @buf: buffer for storing array of nilfs_vinfo structures
427 * @size: size in bytes of one vinfo item in array
428 * @nmembs: count of vinfos in array
429 *
430 * Description: nilfs_ioctl_do_get_vinfo() function returns information
431 * on virtual block addresses. The NILFS_IOCTL_GET_VINFO ioctl is used
432 * by nilfs_cleanerd daemon.
433 *
434 * Return value: count of nilfs_vinfo structures in output buffer.
435 */
436 static ssize_t
nilfs_ioctl_do_get_vinfo(struct the_nilfs * nilfs,__u64 * posp,int flags,void * buf,size_t size,size_t nmembs)437 nilfs_ioctl_do_get_vinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
438 void *buf, size_t size, size_t nmembs)
439 {
440 int ret;
441
442 down_read(&nilfs->ns_segctor_sem);
443 ret = nilfs_dat_get_vinfo(nilfs->ns_dat, buf, size, nmembs);
444 up_read(&nilfs->ns_segctor_sem);
445 return ret;
446 }
447
448 /**
449 * nilfs_ioctl_do_get_bdescs - callback method getting disk block descriptors
450 * @nilfs: nilfs object
451 * @posp: *not used*
452 * @flags: *not used*
453 * @buf: buffer for storing array of nilfs_bdesc structures
454 * @size: size in bytes of one bdesc item in array
455 * @nmembs: count of bdescs in array
456 *
457 * Description: nilfs_ioctl_do_get_bdescs() function returns information
458 * about descriptors of disk block numbers. The NILFS_IOCTL_GET_BDESCS ioctl
459 * is used by nilfs_cleanerd daemon.
460 *
461 * Return value: count of nilfs_bdescs structures in output buffer.
462 */
463 static ssize_t
nilfs_ioctl_do_get_bdescs(struct the_nilfs * nilfs,__u64 * posp,int flags,void * buf,size_t size,size_t nmembs)464 nilfs_ioctl_do_get_bdescs(struct the_nilfs *nilfs, __u64 *posp, int flags,
465 void *buf, size_t size, size_t nmembs)
466 {
467 struct nilfs_bmap *bmap = NILFS_I(nilfs->ns_dat)->i_bmap;
468 struct nilfs_bdesc *bdescs = buf;
469 int ret, i;
470
471 down_read(&nilfs->ns_segctor_sem);
472 for (i = 0; i < nmembs; i++) {
473 ret = nilfs_bmap_lookup_at_level(bmap,
474 bdescs[i].bd_offset,
475 bdescs[i].bd_level + 1,
476 &bdescs[i].bd_blocknr);
477 if (ret < 0) {
478 if (ret != -ENOENT) {
479 up_read(&nilfs->ns_segctor_sem);
480 return ret;
481 }
482 bdescs[i].bd_blocknr = 0;
483 }
484 }
485 up_read(&nilfs->ns_segctor_sem);
486 return nmembs;
487 }
488
489 /**
490 * nilfs_ioctl_get_bdescs - get disk block descriptors
491 * @inode: inode object
492 * @filp: file object
493 * @cmd: ioctl's request code
494 * @argp: pointer on argument from userspace
495 *
496 * Description: nilfs_ioctl_do_get_bdescs() function returns information
497 * about descriptors of disk block numbers. The NILFS_IOCTL_GET_BDESCS ioctl
498 * is used by nilfs_cleanerd daemon.
499 *
500 * Return Value: On success, 0 is returned, and disk block descriptors are
501 * copied into userspace pointer @argp. On error, one of the following
502 * negative error codes is returned.
503 *
504 * %-EINVAL - Invalid arguments from userspace.
505 *
506 * %-EIO - I/O error.
507 *
508 * %-ENOMEM - Insufficient amount of memory available.
509 *
510 * %-EFAULT - Failure during getting disk block descriptors.
511 */
nilfs_ioctl_get_bdescs(struct inode * inode,struct file * filp,unsigned int cmd,void __user * argp)512 static int nilfs_ioctl_get_bdescs(struct inode *inode, struct file *filp,
513 unsigned int cmd, void __user *argp)
514 {
515 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
516 struct nilfs_argv argv;
517 int ret;
518
519 if (copy_from_user(&argv, argp, sizeof(argv)))
520 return -EFAULT;
521
522 if (argv.v_size != sizeof(struct nilfs_bdesc))
523 return -EINVAL;
524
525 ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd),
526 nilfs_ioctl_do_get_bdescs);
527 if (ret < 0)
528 return ret;
529
530 if (copy_to_user(argp, &argv, sizeof(argv)))
531 ret = -EFAULT;
532 return ret;
533 }
534
535 /**
536 * nilfs_ioctl_move_inode_block - prepare data/node block for moving by GC
537 * @inode: inode object
538 * @vdesc: descriptor of virtual block number
539 * @buffers: list of moving buffers
540 *
541 * Description: nilfs_ioctl_move_inode_block() function registers data/node
542 * buffer in the GC pagecache and submit read request.
543 *
544 * Return Value: On success, 0 is returned. On error, one of the following
545 * negative error codes is returned.
546 *
547 * %-EIO - I/O error.
548 *
549 * %-ENOMEM - Insufficient amount of memory available.
550 *
551 * %-ENOENT - Requested block doesn't exist.
552 *
553 * %-EEXIST - Blocks conflict is detected.
554 */
nilfs_ioctl_move_inode_block(struct inode * inode,struct nilfs_vdesc * vdesc,struct list_head * buffers)555 static int nilfs_ioctl_move_inode_block(struct inode *inode,
556 struct nilfs_vdesc *vdesc,
557 struct list_head *buffers)
558 {
559 struct buffer_head *bh;
560 int ret;
561
562 if (vdesc->vd_flags == 0)
563 ret = nilfs_gccache_submit_read_data(
564 inode, vdesc->vd_offset, vdesc->vd_blocknr,
565 vdesc->vd_vblocknr, &bh);
566 else
567 ret = nilfs_gccache_submit_read_node(
568 inode, vdesc->vd_blocknr, vdesc->vd_vblocknr, &bh);
569
570 if (unlikely(ret < 0)) {
571 if (ret == -ENOENT)
572 nilfs_msg(inode->i_sb, KERN_CRIT,
573 "%s: invalid virtual block address (%s): ino=%llu, cno=%llu, offset=%llu, blocknr=%llu, vblocknr=%llu",
574 __func__, vdesc->vd_flags ? "node" : "data",
575 (unsigned long long)vdesc->vd_ino,
576 (unsigned long long)vdesc->vd_cno,
577 (unsigned long long)vdesc->vd_offset,
578 (unsigned long long)vdesc->vd_blocknr,
579 (unsigned long long)vdesc->vd_vblocknr);
580 return ret;
581 }
582 if (unlikely(!list_empty(&bh->b_assoc_buffers))) {
583 nilfs_msg(inode->i_sb, KERN_CRIT,
584 "%s: conflicting %s buffer: ino=%llu, cno=%llu, offset=%llu, blocknr=%llu, vblocknr=%llu",
585 __func__, vdesc->vd_flags ? "node" : "data",
586 (unsigned long long)vdesc->vd_ino,
587 (unsigned long long)vdesc->vd_cno,
588 (unsigned long long)vdesc->vd_offset,
589 (unsigned long long)vdesc->vd_blocknr,
590 (unsigned long long)vdesc->vd_vblocknr);
591 brelse(bh);
592 return -EEXIST;
593 }
594 list_add_tail(&bh->b_assoc_buffers, buffers);
595 return 0;
596 }
597
598 /**
599 * nilfs_ioctl_move_blocks - move valid inode's blocks during garbage collection
600 * @sb: superblock object
601 * @argv: vector of arguments from userspace
602 * @buf: array of nilfs_vdesc structures
603 *
604 * Description: nilfs_ioctl_move_blocks() function reads valid data/node
605 * blocks that garbage collector specified with the array of nilfs_vdesc
606 * structures and stores them into page caches of GC inodes.
607 *
608 * Return Value: Number of processed nilfs_vdesc structures or
609 * error code, otherwise.
610 */
nilfs_ioctl_move_blocks(struct super_block * sb,struct nilfs_argv * argv,void * buf)611 static int nilfs_ioctl_move_blocks(struct super_block *sb,
612 struct nilfs_argv *argv, void *buf)
613 {
614 size_t nmembs = argv->v_nmembs;
615 struct the_nilfs *nilfs = sb->s_fs_info;
616 struct inode *inode;
617 struct nilfs_vdesc *vdesc;
618 struct buffer_head *bh, *n;
619 LIST_HEAD(buffers);
620 ino_t ino;
621 __u64 cno;
622 int i, ret;
623
624 for (i = 0, vdesc = buf; i < nmembs; ) {
625 ino = vdesc->vd_ino;
626 cno = vdesc->vd_cno;
627 inode = nilfs_iget_for_gc(sb, ino, cno);
628 if (IS_ERR(inode)) {
629 ret = PTR_ERR(inode);
630 goto failed;
631 }
632 if (list_empty(&NILFS_I(inode)->i_dirty)) {
633 /*
634 * Add the inode to GC inode list. Garbage Collection
635 * is serialized and no two processes manipulate the
636 * list simultaneously.
637 */
638 igrab(inode);
639 list_add(&NILFS_I(inode)->i_dirty,
640 &nilfs->ns_gc_inodes);
641 }
642
643 do {
644 ret = nilfs_ioctl_move_inode_block(inode, vdesc,
645 &buffers);
646 if (unlikely(ret < 0)) {
647 iput(inode);
648 goto failed;
649 }
650 vdesc++;
651 } while (++i < nmembs &&
652 vdesc->vd_ino == ino && vdesc->vd_cno == cno);
653
654 iput(inode); /* The inode still remains in GC inode list */
655 }
656
657 list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) {
658 ret = nilfs_gccache_wait_and_mark_dirty(bh);
659 if (unlikely(ret < 0)) {
660 WARN_ON(ret == -EEXIST);
661 goto failed;
662 }
663 list_del_init(&bh->b_assoc_buffers);
664 brelse(bh);
665 }
666 return nmembs;
667
668 failed:
669 list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) {
670 list_del_init(&bh->b_assoc_buffers);
671 brelse(bh);
672 }
673 return ret;
674 }
675
676 /**
677 * nilfs_ioctl_delete_checkpoints - delete checkpoints
678 * @nilfs: nilfs object
679 * @argv: vector of arguments from userspace
680 * @buf: array of periods of checkpoints numbers
681 *
682 * Description: nilfs_ioctl_delete_checkpoints() function deletes checkpoints
683 * in the period from p_start to p_end, excluding p_end itself. The checkpoints
684 * which have been already deleted are ignored.
685 *
686 * Return Value: Number of processed nilfs_period structures or
687 * error code, otherwise.
688 *
689 * %-EIO - I/O error.
690 *
691 * %-ENOMEM - Insufficient amount of memory available.
692 *
693 * %-EINVAL - invalid checkpoints.
694 */
nilfs_ioctl_delete_checkpoints(struct the_nilfs * nilfs,struct nilfs_argv * argv,void * buf)695 static int nilfs_ioctl_delete_checkpoints(struct the_nilfs *nilfs,
696 struct nilfs_argv *argv, void *buf)
697 {
698 size_t nmembs = argv->v_nmembs;
699 struct inode *cpfile = nilfs->ns_cpfile;
700 struct nilfs_period *periods = buf;
701 int ret, i;
702
703 for (i = 0; i < nmembs; i++) {
704 ret = nilfs_cpfile_delete_checkpoints(
705 cpfile, periods[i].p_start, periods[i].p_end);
706 if (ret < 0)
707 return ret;
708 }
709 return nmembs;
710 }
711
712 /**
713 * nilfs_ioctl_free_vblocknrs - free virtual block numbers
714 * @nilfs: nilfs object
715 * @argv: vector of arguments from userspace
716 * @buf: array of virtual block numbers
717 *
718 * Description: nilfs_ioctl_free_vblocknrs() function frees
719 * the virtual block numbers specified by @buf and @argv->v_nmembs.
720 *
721 * Return Value: Number of processed virtual block numbers or
722 * error code, otherwise.
723 *
724 * %-EIO - I/O error.
725 *
726 * %-ENOMEM - Insufficient amount of memory available.
727 *
728 * %-ENOENT - The virtual block number have not been allocated.
729 */
nilfs_ioctl_free_vblocknrs(struct the_nilfs * nilfs,struct nilfs_argv * argv,void * buf)730 static int nilfs_ioctl_free_vblocknrs(struct the_nilfs *nilfs,
731 struct nilfs_argv *argv, void *buf)
732 {
733 size_t nmembs = argv->v_nmembs;
734 int ret;
735
736 ret = nilfs_dat_freev(nilfs->ns_dat, buf, nmembs);
737
738 return (ret < 0) ? ret : nmembs;
739 }
740
741 /**
742 * nilfs_ioctl_mark_blocks_dirty - mark blocks dirty
743 * @nilfs: nilfs object
744 * @argv: vector of arguments from userspace
745 * @buf: array of block descriptors
746 *
747 * Description: nilfs_ioctl_mark_blocks_dirty() function marks
748 * metadata file or data blocks as dirty.
749 *
750 * Return Value: Number of processed block descriptors or
751 * error code, otherwise.
752 *
753 * %-ENOMEM - Insufficient memory available.
754 *
755 * %-EIO - I/O error
756 *
757 * %-ENOENT - the specified block does not exist (hole block)
758 */
nilfs_ioctl_mark_blocks_dirty(struct the_nilfs * nilfs,struct nilfs_argv * argv,void * buf)759 static int nilfs_ioctl_mark_blocks_dirty(struct the_nilfs *nilfs,
760 struct nilfs_argv *argv, void *buf)
761 {
762 size_t nmembs = argv->v_nmembs;
763 struct nilfs_bmap *bmap = NILFS_I(nilfs->ns_dat)->i_bmap;
764 struct nilfs_bdesc *bdescs = buf;
765 struct buffer_head *bh;
766 int ret, i;
767
768 for (i = 0; i < nmembs; i++) {
769 /* XXX: use macro or inline func to check liveness */
770 ret = nilfs_bmap_lookup_at_level(bmap,
771 bdescs[i].bd_offset,
772 bdescs[i].bd_level + 1,
773 &bdescs[i].bd_blocknr);
774 if (ret < 0) {
775 if (ret != -ENOENT)
776 return ret;
777 bdescs[i].bd_blocknr = 0;
778 }
779 if (bdescs[i].bd_blocknr != bdescs[i].bd_oblocknr)
780 /* skip dead block */
781 continue;
782 if (bdescs[i].bd_level == 0) {
783 ret = nilfs_mdt_get_block(nilfs->ns_dat,
784 bdescs[i].bd_offset,
785 false, NULL, &bh);
786 if (unlikely(ret)) {
787 WARN_ON(ret == -ENOENT);
788 return ret;
789 }
790 mark_buffer_dirty(bh);
791 nilfs_mdt_mark_dirty(nilfs->ns_dat);
792 put_bh(bh);
793 } else {
794 ret = nilfs_bmap_mark(bmap, bdescs[i].bd_offset,
795 bdescs[i].bd_level);
796 if (ret < 0) {
797 WARN_ON(ret == -ENOENT);
798 return ret;
799 }
800 }
801 }
802 return nmembs;
803 }
804
nilfs_ioctl_prepare_clean_segments(struct the_nilfs * nilfs,struct nilfs_argv * argv,void ** kbufs)805 int nilfs_ioctl_prepare_clean_segments(struct the_nilfs *nilfs,
806 struct nilfs_argv *argv, void **kbufs)
807 {
808 const char *msg;
809 int ret;
810
811 ret = nilfs_ioctl_delete_checkpoints(nilfs, &argv[1], kbufs[1]);
812 if (ret < 0) {
813 /*
814 * can safely abort because checkpoints can be removed
815 * independently.
816 */
817 msg = "cannot delete checkpoints";
818 goto failed;
819 }
820 ret = nilfs_ioctl_free_vblocknrs(nilfs, &argv[2], kbufs[2]);
821 if (ret < 0) {
822 /*
823 * can safely abort because DAT file is updated atomically
824 * using a copy-on-write technique.
825 */
826 msg = "cannot delete virtual blocks from DAT file";
827 goto failed;
828 }
829 ret = nilfs_ioctl_mark_blocks_dirty(nilfs, &argv[3], kbufs[3]);
830 if (ret < 0) {
831 /*
832 * can safely abort because the operation is nondestructive.
833 */
834 msg = "cannot mark copying blocks dirty";
835 goto failed;
836 }
837 return 0;
838
839 failed:
840 nilfs_msg(nilfs->ns_sb, KERN_ERR, "error %d preparing GC: %s", ret,
841 msg);
842 return ret;
843 }
844
845 /**
846 * nilfs_ioctl_clean_segments - clean segments
847 * @inode: inode object
848 * @filp: file object
849 * @cmd: ioctl's request code
850 * @argp: pointer on argument from userspace
851 *
852 * Description: nilfs_ioctl_clean_segments() function makes garbage
853 * collection operation in the environment of requested parameters
854 * from userspace. The NILFS_IOCTL_CLEAN_SEGMENTS ioctl is used by
855 * nilfs_cleanerd daemon.
856 *
857 * Return Value: On success, 0 is returned or error code, otherwise.
858 */
nilfs_ioctl_clean_segments(struct inode * inode,struct file * filp,unsigned int cmd,void __user * argp)859 static int nilfs_ioctl_clean_segments(struct inode *inode, struct file *filp,
860 unsigned int cmd, void __user *argp)
861 {
862 struct nilfs_argv argv[5];
863 static const size_t argsz[5] = {
864 sizeof(struct nilfs_vdesc),
865 sizeof(struct nilfs_period),
866 sizeof(__u64),
867 sizeof(struct nilfs_bdesc),
868 sizeof(__u64),
869 };
870 void __user *base;
871 void *kbufs[5];
872 struct the_nilfs *nilfs;
873 size_t len, nsegs;
874 int n, ret;
875
876 if (!capable(CAP_SYS_ADMIN))
877 return -EPERM;
878
879 ret = mnt_want_write_file(filp);
880 if (ret)
881 return ret;
882
883 ret = -EFAULT;
884 if (copy_from_user(argv, argp, sizeof(argv)))
885 goto out;
886
887 ret = -EINVAL;
888 nsegs = argv[4].v_nmembs;
889 if (argv[4].v_size != argsz[4])
890 goto out;
891 if (nsegs > UINT_MAX / sizeof(__u64))
892 goto out;
893
894 /*
895 * argv[4] points to segment numbers this ioctl cleans. We
896 * use kmalloc() for its buffer because memory used for the
897 * segment numbers is enough small.
898 */
899 kbufs[4] = memdup_user((void __user *)(unsigned long)argv[4].v_base,
900 nsegs * sizeof(__u64));
901 if (IS_ERR(kbufs[4])) {
902 ret = PTR_ERR(kbufs[4]);
903 goto out;
904 }
905 nilfs = inode->i_sb->s_fs_info;
906
907 for (n = 0; n < 4; n++) {
908 ret = -EINVAL;
909 if (argv[n].v_size != argsz[n])
910 goto out_free;
911
912 if (argv[n].v_nmembs > nsegs * nilfs->ns_blocks_per_segment)
913 goto out_free;
914
915 if (argv[n].v_nmembs >= UINT_MAX / argv[n].v_size)
916 goto out_free;
917
918 len = argv[n].v_size * argv[n].v_nmembs;
919 base = (void __user *)(unsigned long)argv[n].v_base;
920 if (len == 0) {
921 kbufs[n] = NULL;
922 continue;
923 }
924
925 kbufs[n] = vmalloc(len);
926 if (!kbufs[n]) {
927 ret = -ENOMEM;
928 goto out_free;
929 }
930 if (copy_from_user(kbufs[n], base, len)) {
931 ret = -EFAULT;
932 vfree(kbufs[n]);
933 goto out_free;
934 }
935 }
936
937 /*
938 * nilfs_ioctl_move_blocks() will call nilfs_iget_for_gc(),
939 * which will operates an inode list without blocking.
940 * To protect the list from concurrent operations,
941 * nilfs_ioctl_move_blocks should be atomic operation.
942 */
943 if (test_and_set_bit(THE_NILFS_GC_RUNNING, &nilfs->ns_flags)) {
944 ret = -EBUSY;
945 goto out_free;
946 }
947
948 ret = nilfs_ioctl_move_blocks(inode->i_sb, &argv[0], kbufs[0]);
949 if (ret < 0) {
950 nilfs_msg(inode->i_sb, KERN_ERR,
951 "error %d preparing GC: cannot read source blocks",
952 ret);
953 } else {
954 if (nilfs_sb_need_update(nilfs))
955 set_nilfs_discontinued(nilfs);
956 ret = nilfs_clean_segments(inode->i_sb, argv, kbufs);
957 }
958
959 nilfs_remove_all_gcinodes(nilfs);
960 clear_nilfs_gc_running(nilfs);
961
962 out_free:
963 while (--n >= 0)
964 vfree(kbufs[n]);
965 kfree(kbufs[4]);
966 out:
967 mnt_drop_write_file(filp);
968 return ret;
969 }
970
971 /**
972 * nilfs_ioctl_sync - make a checkpoint
973 * @inode: inode object
974 * @filp: file object
975 * @cmd: ioctl's request code
976 * @argp: pointer on argument from userspace
977 *
978 * Description: nilfs_ioctl_sync() function constructs a logical segment
979 * for checkpointing. This function guarantees that all modified data
980 * and metadata are written out to the device when it successfully
981 * returned.
982 *
983 * Return Value: On success, 0 is retured. On errors, one of the following
984 * negative error code is returned.
985 *
986 * %-EROFS - Read only filesystem.
987 *
988 * %-EIO - I/O error
989 *
990 * %-ENOSPC - No space left on device (only in a panic state).
991 *
992 * %-ERESTARTSYS - Interrupted.
993 *
994 * %-ENOMEM - Insufficient memory available.
995 *
996 * %-EFAULT - Failure during execution of requested operation.
997 */
nilfs_ioctl_sync(struct inode * inode,struct file * filp,unsigned int cmd,void __user * argp)998 static int nilfs_ioctl_sync(struct inode *inode, struct file *filp,
999 unsigned int cmd, void __user *argp)
1000 {
1001 __u64 cno;
1002 int ret;
1003 struct the_nilfs *nilfs;
1004
1005 ret = nilfs_construct_segment(inode->i_sb);
1006 if (ret < 0)
1007 return ret;
1008
1009 nilfs = inode->i_sb->s_fs_info;
1010 ret = nilfs_flush_device(nilfs);
1011 if (ret < 0)
1012 return ret;
1013
1014 if (argp != NULL) {
1015 down_read(&nilfs->ns_segctor_sem);
1016 cno = nilfs->ns_cno - 1;
1017 up_read(&nilfs->ns_segctor_sem);
1018 if (copy_to_user(argp, &cno, sizeof(cno)))
1019 return -EFAULT;
1020 }
1021 return 0;
1022 }
1023
1024 /**
1025 * nilfs_ioctl_resize - resize NILFS2 volume
1026 * @inode: inode object
1027 * @filp: file object
1028 * @argp: pointer on argument from userspace
1029 *
1030 * Return Value: On success, 0 is returned or error code, otherwise.
1031 */
nilfs_ioctl_resize(struct inode * inode,struct file * filp,void __user * argp)1032 static int nilfs_ioctl_resize(struct inode *inode, struct file *filp,
1033 void __user *argp)
1034 {
1035 __u64 newsize;
1036 int ret = -EPERM;
1037
1038 if (!capable(CAP_SYS_ADMIN))
1039 goto out;
1040
1041 ret = mnt_want_write_file(filp);
1042 if (ret)
1043 goto out;
1044
1045 ret = -EFAULT;
1046 if (copy_from_user(&newsize, argp, sizeof(newsize)))
1047 goto out_drop_write;
1048
1049 ret = nilfs_resize_fs(inode->i_sb, newsize);
1050
1051 out_drop_write:
1052 mnt_drop_write_file(filp);
1053 out:
1054 return ret;
1055 }
1056
1057 /**
1058 * nilfs_ioctl_trim_fs() - trim ioctl handle function
1059 * @inode: inode object
1060 * @argp: pointer on argument from userspace
1061 *
1062 * Decription: nilfs_ioctl_trim_fs is the FITRIM ioctl handle function. It
1063 * checks the arguments from userspace and calls nilfs_sufile_trim_fs, which
1064 * performs the actual trim operation.
1065 *
1066 * Return Value: On success, 0 is returned or negative error code, otherwise.
1067 */
nilfs_ioctl_trim_fs(struct inode * inode,void __user * argp)1068 static int nilfs_ioctl_trim_fs(struct inode *inode, void __user *argp)
1069 {
1070 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
1071 struct request_queue *q = bdev_get_queue(nilfs->ns_bdev);
1072 struct fstrim_range range;
1073 int ret;
1074
1075 if (!capable(CAP_SYS_ADMIN))
1076 return -EPERM;
1077
1078 if (!blk_queue_discard(q))
1079 return -EOPNOTSUPP;
1080
1081 if (copy_from_user(&range, argp, sizeof(range)))
1082 return -EFAULT;
1083
1084 range.minlen = max_t(u64, range.minlen, q->limits.discard_granularity);
1085
1086 down_read(&nilfs->ns_segctor_sem);
1087 ret = nilfs_sufile_trim_fs(nilfs->ns_sufile, &range);
1088 up_read(&nilfs->ns_segctor_sem);
1089
1090 if (ret < 0)
1091 return ret;
1092
1093 if (copy_to_user(argp, &range, sizeof(range)))
1094 return -EFAULT;
1095
1096 return 0;
1097 }
1098
1099 /**
1100 * nilfs_ioctl_set_alloc_range - limit range of segments to be allocated
1101 * @inode: inode object
1102 * @argp: pointer on argument from userspace
1103 *
1104 * Decription: nilfs_ioctl_set_alloc_range() function defines lower limit
1105 * of segments in bytes and upper limit of segments in bytes.
1106 * The NILFS_IOCTL_SET_ALLOC_RANGE is used by nilfs_resize utility.
1107 *
1108 * Return Value: On success, 0 is returned or error code, otherwise.
1109 */
nilfs_ioctl_set_alloc_range(struct inode * inode,void __user * argp)1110 static int nilfs_ioctl_set_alloc_range(struct inode *inode, void __user *argp)
1111 {
1112 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
1113 __u64 range[2];
1114 __u64 minseg, maxseg;
1115 unsigned long segbytes;
1116 int ret = -EPERM;
1117
1118 if (!capable(CAP_SYS_ADMIN))
1119 goto out;
1120
1121 ret = -EFAULT;
1122 if (copy_from_user(range, argp, sizeof(__u64[2])))
1123 goto out;
1124
1125 ret = -ERANGE;
1126 if (range[1] > i_size_read(inode->i_sb->s_bdev->bd_inode))
1127 goto out;
1128
1129 segbytes = nilfs->ns_blocks_per_segment * nilfs->ns_blocksize;
1130
1131 minseg = range[0] + segbytes - 1;
1132 do_div(minseg, segbytes);
1133 maxseg = NILFS_SB2_OFFSET_BYTES(range[1]);
1134 do_div(maxseg, segbytes);
1135 maxseg--;
1136
1137 ret = nilfs_sufile_set_alloc_range(nilfs->ns_sufile, minseg, maxseg);
1138 out:
1139 return ret;
1140 }
1141
1142 /**
1143 * nilfs_ioctl_get_info - wrapping function of get metadata info
1144 * @inode: inode object
1145 * @filp: file object
1146 * @cmd: ioctl's request code
1147 * @argp: pointer on argument from userspace
1148 * @membsz: size of an item in bytes
1149 * @dofunc: concrete function of getting metadata info
1150 *
1151 * Description: nilfs_ioctl_get_info() gets metadata info by means of
1152 * calling dofunc() function.
1153 *
1154 * Return Value: On success, 0 is returned and requested metadata info
1155 * is copied into userspace. On error, one of the following
1156 * negative error codes is returned.
1157 *
1158 * %-EINVAL - Invalid arguments from userspace.
1159 *
1160 * %-ENOMEM - Insufficient amount of memory available.
1161 *
1162 * %-EFAULT - Failure during execution of requested operation.
1163 */
nilfs_ioctl_get_info(struct inode * inode,struct file * filp,unsigned int cmd,void __user * argp,size_t membsz,ssize_t (* dofunc)(struct the_nilfs *,__u64 *,int,void *,size_t,size_t))1164 static int nilfs_ioctl_get_info(struct inode *inode, struct file *filp,
1165 unsigned int cmd, void __user *argp,
1166 size_t membsz,
1167 ssize_t (*dofunc)(struct the_nilfs *,
1168 __u64 *, int,
1169 void *, size_t, size_t))
1170
1171 {
1172 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
1173 struct nilfs_argv argv;
1174 int ret;
1175
1176 if (copy_from_user(&argv, argp, sizeof(argv)))
1177 return -EFAULT;
1178
1179 if (argv.v_size < membsz)
1180 return -EINVAL;
1181
1182 ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), dofunc);
1183 if (ret < 0)
1184 return ret;
1185
1186 if (copy_to_user(argp, &argv, sizeof(argv)))
1187 ret = -EFAULT;
1188 return ret;
1189 }
1190
1191 /**
1192 * nilfs_ioctl_set_suinfo - set segment usage info
1193 * @inode: inode object
1194 * @filp: file object
1195 * @cmd: ioctl's request code
1196 * @argp: pointer on argument from userspace
1197 *
1198 * Description: Expects an array of nilfs_suinfo_update structures
1199 * encapsulated in nilfs_argv and updates the segment usage info
1200 * according to the flags in nilfs_suinfo_update.
1201 *
1202 * Return Value: On success, 0 is returned. On error, one of the
1203 * following negative error codes is returned.
1204 *
1205 * %-EPERM - Not enough permissions
1206 *
1207 * %-EFAULT - Error copying input data
1208 *
1209 * %-EIO - I/O error.
1210 *
1211 * %-ENOMEM - Insufficient amount of memory available.
1212 *
1213 * %-EINVAL - Invalid values in input (segment number, flags or nblocks)
1214 */
nilfs_ioctl_set_suinfo(struct inode * inode,struct file * filp,unsigned int cmd,void __user * argp)1215 static int nilfs_ioctl_set_suinfo(struct inode *inode, struct file *filp,
1216 unsigned int cmd, void __user *argp)
1217 {
1218 struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
1219 struct nilfs_transaction_info ti;
1220 struct nilfs_argv argv;
1221 size_t len;
1222 void __user *base;
1223 void *kbuf;
1224 int ret;
1225
1226 if (!capable(CAP_SYS_ADMIN))
1227 return -EPERM;
1228
1229 ret = mnt_want_write_file(filp);
1230 if (ret)
1231 return ret;
1232
1233 ret = -EFAULT;
1234 if (copy_from_user(&argv, argp, sizeof(argv)))
1235 goto out;
1236
1237 ret = -EINVAL;
1238 if (argv.v_size < sizeof(struct nilfs_suinfo_update))
1239 goto out;
1240
1241 if (argv.v_nmembs > nilfs->ns_nsegments)
1242 goto out;
1243
1244 if (argv.v_nmembs >= UINT_MAX / argv.v_size)
1245 goto out;
1246
1247 len = argv.v_size * argv.v_nmembs;
1248 if (!len) {
1249 ret = 0;
1250 goto out;
1251 }
1252
1253 base = (void __user *)(unsigned long)argv.v_base;
1254 kbuf = vmalloc(len);
1255 if (!kbuf) {
1256 ret = -ENOMEM;
1257 goto out;
1258 }
1259
1260 if (copy_from_user(kbuf, base, len)) {
1261 ret = -EFAULT;
1262 goto out_free;
1263 }
1264
1265 nilfs_transaction_begin(inode->i_sb, &ti, 0);
1266 ret = nilfs_sufile_set_suinfo(nilfs->ns_sufile, kbuf, argv.v_size,
1267 argv.v_nmembs);
1268 if (unlikely(ret < 0))
1269 nilfs_transaction_abort(inode->i_sb);
1270 else
1271 nilfs_transaction_commit(inode->i_sb); /* never fails */
1272
1273 out_free:
1274 vfree(kbuf);
1275 out:
1276 mnt_drop_write_file(filp);
1277 return ret;
1278 }
1279
nilfs_ioctl(struct file * filp,unsigned int cmd,unsigned long arg)1280 long nilfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1281 {
1282 struct inode *inode = file_inode(filp);
1283 void __user *argp = (void __user *)arg;
1284
1285 switch (cmd) {
1286 case FS_IOC_GETFLAGS:
1287 return nilfs_ioctl_getflags(inode, argp);
1288 case FS_IOC_SETFLAGS:
1289 return nilfs_ioctl_setflags(inode, filp, argp);
1290 case FS_IOC_GETVERSION:
1291 return nilfs_ioctl_getversion(inode, argp);
1292 case NILFS_IOCTL_CHANGE_CPMODE:
1293 return nilfs_ioctl_change_cpmode(inode, filp, cmd, argp);
1294 case NILFS_IOCTL_DELETE_CHECKPOINT:
1295 return nilfs_ioctl_delete_checkpoint(inode, filp, cmd, argp);
1296 case NILFS_IOCTL_GET_CPINFO:
1297 return nilfs_ioctl_get_info(inode, filp, cmd, argp,
1298 sizeof(struct nilfs_cpinfo),
1299 nilfs_ioctl_do_get_cpinfo);
1300 case NILFS_IOCTL_GET_CPSTAT:
1301 return nilfs_ioctl_get_cpstat(inode, filp, cmd, argp);
1302 case NILFS_IOCTL_GET_SUINFO:
1303 return nilfs_ioctl_get_info(inode, filp, cmd, argp,
1304 sizeof(struct nilfs_suinfo),
1305 nilfs_ioctl_do_get_suinfo);
1306 case NILFS_IOCTL_SET_SUINFO:
1307 return nilfs_ioctl_set_suinfo(inode, filp, cmd, argp);
1308 case NILFS_IOCTL_GET_SUSTAT:
1309 return nilfs_ioctl_get_sustat(inode, filp, cmd, argp);
1310 case NILFS_IOCTL_GET_VINFO:
1311 return nilfs_ioctl_get_info(inode, filp, cmd, argp,
1312 sizeof(struct nilfs_vinfo),
1313 nilfs_ioctl_do_get_vinfo);
1314 case NILFS_IOCTL_GET_BDESCS:
1315 return nilfs_ioctl_get_bdescs(inode, filp, cmd, argp);
1316 case NILFS_IOCTL_CLEAN_SEGMENTS:
1317 return nilfs_ioctl_clean_segments(inode, filp, cmd, argp);
1318 case NILFS_IOCTL_SYNC:
1319 return nilfs_ioctl_sync(inode, filp, cmd, argp);
1320 case NILFS_IOCTL_RESIZE:
1321 return nilfs_ioctl_resize(inode, filp, argp);
1322 case NILFS_IOCTL_SET_ALLOC_RANGE:
1323 return nilfs_ioctl_set_alloc_range(inode, argp);
1324 case FITRIM:
1325 return nilfs_ioctl_trim_fs(inode, argp);
1326 default:
1327 return -ENOTTY;
1328 }
1329 }
1330
1331 #ifdef CONFIG_COMPAT
nilfs_compat_ioctl(struct file * filp,unsigned int cmd,unsigned long arg)1332 long nilfs_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1333 {
1334 switch (cmd) {
1335 case FS_IOC32_GETFLAGS:
1336 cmd = FS_IOC_GETFLAGS;
1337 break;
1338 case FS_IOC32_SETFLAGS:
1339 cmd = FS_IOC_SETFLAGS;
1340 break;
1341 case FS_IOC32_GETVERSION:
1342 cmd = FS_IOC_GETVERSION;
1343 break;
1344 case NILFS_IOCTL_CHANGE_CPMODE:
1345 case NILFS_IOCTL_DELETE_CHECKPOINT:
1346 case NILFS_IOCTL_GET_CPINFO:
1347 case NILFS_IOCTL_GET_CPSTAT:
1348 case NILFS_IOCTL_GET_SUINFO:
1349 case NILFS_IOCTL_SET_SUINFO:
1350 case NILFS_IOCTL_GET_SUSTAT:
1351 case NILFS_IOCTL_GET_VINFO:
1352 case NILFS_IOCTL_GET_BDESCS:
1353 case NILFS_IOCTL_CLEAN_SEGMENTS:
1354 case NILFS_IOCTL_SYNC:
1355 case NILFS_IOCTL_RESIZE:
1356 case NILFS_IOCTL_SET_ALLOC_RANGE:
1357 break;
1358 default:
1359 return -ENOIOCTLCMD;
1360 }
1361 return nilfs_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
1362 }
1363 #endif
1364
