Commit | Line | Data |
---|---|---|
7942b919 KS |
1 | /* |
2 | * ioctl.c - NILFS ioctl operations. | |
3 | * | |
4 | * Copyright (C) 2007, 2008 Nippon Telegraph and Telephone Corporation. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | * | |
20 | * Written by Koji Sato <koji@osrg.net>. | |
21 | */ | |
22 | ||
23 | #include <linux/fs.h> | |
24 | #include <linux/wait.h> | |
5a0e3ad6 | 25 | #include <linux/slab.h> |
7942b919 KS |
26 | #include <linux/capability.h> /* capable() */ |
27 | #include <linux/uaccess.h> /* copy_from_user(), copy_to_user() */ | |
4f6b8288 | 28 | #include <linux/vmalloc.h> |
828b1c50 | 29 | #include <linux/compat.h> /* compat_ptr() */ |
2a79f17e | 30 | #include <linux/mount.h> /* mnt_want_write_file(), mnt_drop_write_file() */ |
ae191838 | 31 | #include <linux/buffer_head.h> |
7942b919 KS |
32 | #include <linux/nilfs2_fs.h> |
33 | #include "nilfs.h" | |
34 | #include "segment.h" | |
35 | #include "bmap.h" | |
36 | #include "cpfile.h" | |
37 | #include "sufile.h" | |
38 | #include "dat.h" | |
39 | ||
40 | ||
7942b919 KS |
41 | static int nilfs_ioctl_wrap_copy(struct the_nilfs *nilfs, |
42 | struct nilfs_argv *argv, int dir, | |
43 | ssize_t (*dofunc)(struct the_nilfs *, | |
b028fcfc | 44 | __u64 *, int, |
7942b919 KS |
45 | void *, size_t, size_t)) |
46 | { | |
47 | void *buf; | |
dc498d09 | 48 | void __user *base = (void __user *)(unsigned long)argv->v_base; |
3358b4aa | 49 | size_t maxmembs, total, n; |
7942b919 KS |
50 | ssize_t nr; |
51 | int ret, i; | |
b028fcfc | 52 | __u64 pos, ppos; |
7942b919 KS |
53 | |
54 | if (argv->v_nmembs == 0) | |
55 | return 0; | |
56 | ||
3358b4aa RK |
57 | if (argv->v_size > PAGE_SIZE) |
58 | return -EINVAL; | |
59 | ||
4b15d617 WF |
60 | /* |
61 | * Reject pairs of a start item position (argv->v_index) and a | |
62 | * total count (argv->v_nmembs) which leads position 'pos' to | |
63 | * overflow by the increment at the end of the loop. | |
64 | */ | |
65 | if (argv->v_index > ~(__u64)0 - argv->v_nmembs) | |
66 | return -EINVAL; | |
67 | ||
3358b4aa RK |
68 | buf = (void *)__get_free_pages(GFP_NOFS, 0); |
69 | if (unlikely(!buf)) | |
7942b919 | 70 | return -ENOMEM; |
3358b4aa | 71 | maxmembs = PAGE_SIZE / argv->v_size; |
7942b919 KS |
72 | |
73 | ret = 0; | |
74 | total = 0; | |
b028fcfc | 75 | pos = argv->v_index; |
7942b919 KS |
76 | for (i = 0; i < argv->v_nmembs; i += n) { |
77 | n = (argv->v_nmembs - i < maxmembs) ? | |
78 | argv->v_nmembs - i : maxmembs; | |
79 | if ((dir & _IOC_WRITE) && | |
dc498d09 RK |
80 | copy_from_user(buf, base + argv->v_size * i, |
81 | argv->v_size * n)) { | |
7942b919 KS |
82 | ret = -EFAULT; |
83 | break; | |
84 | } | |
b028fcfc | 85 | ppos = pos; |
8acfbf09 | 86 | nr = dofunc(nilfs, &pos, argv->v_flags, buf, argv->v_size, |
b028fcfc | 87 | n); |
7942b919 KS |
88 | if (nr < 0) { |
89 | ret = nr; | |
90 | break; | |
91 | } | |
92 | if ((dir & _IOC_READ) && | |
dc498d09 RK |
93 | copy_to_user(base + argv->v_size * i, buf, |
94 | argv->v_size * nr)) { | |
7942b919 KS |
95 | ret = -EFAULT; |
96 | break; | |
97 | } | |
98 | total += nr; | |
b028fcfc RK |
99 | if ((size_t)nr < n) |
100 | break; | |
101 | if (pos == ppos) | |
102 | pos += n; | |
7942b919 KS |
103 | } |
104 | argv->v_nmembs = total; | |
105 | ||
3358b4aa | 106 | free_pages((unsigned long)buf, 0); |
7942b919 KS |
107 | return ret; |
108 | } | |
109 | ||
cde98f0f RK |
110 | static int nilfs_ioctl_getflags(struct inode *inode, void __user *argp) |
111 | { | |
112 | unsigned int flags = NILFS_I(inode)->i_flags & FS_FL_USER_VISIBLE; | |
113 | ||
114 | return put_user(flags, (int __user *)argp); | |
115 | } | |
116 | ||
117 | static int nilfs_ioctl_setflags(struct inode *inode, struct file *filp, | |
118 | void __user *argp) | |
119 | { | |
120 | struct nilfs_transaction_info ti; | |
121 | unsigned int flags, oldflags; | |
122 | int ret; | |
123 | ||
2e149670 | 124 | if (!inode_owner_or_capable(inode)) |
cde98f0f RK |
125 | return -EACCES; |
126 | ||
127 | if (get_user(flags, (int __user *)argp)) | |
128 | return -EFAULT; | |
129 | ||
a561be71 | 130 | ret = mnt_want_write_file(filp); |
cde98f0f RK |
131 | if (ret) |
132 | return ret; | |
133 | ||
134 | flags = nilfs_mask_flags(inode->i_mode, flags); | |
135 | ||
136 | mutex_lock(&inode->i_mutex); | |
137 | ||
138 | oldflags = NILFS_I(inode)->i_flags; | |
139 | ||
140 | /* | |
141 | * The IMMUTABLE and APPEND_ONLY flags can only be changed by the | |
142 | * relevant capability. | |
143 | */ | |
144 | ret = -EPERM; | |
145 | if (((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) && | |
146 | !capable(CAP_LINUX_IMMUTABLE)) | |
147 | goto out; | |
148 | ||
149 | ret = nilfs_transaction_begin(inode->i_sb, &ti, 0); | |
150 | if (ret) | |
151 | goto out; | |
152 | ||
153 | NILFS_I(inode)->i_flags = (oldflags & ~FS_FL_USER_MODIFIABLE) | | |
154 | (flags & FS_FL_USER_MODIFIABLE); | |
155 | ||
156 | nilfs_set_inode_flags(inode); | |
157 | inode->i_ctime = CURRENT_TIME; | |
158 | if (IS_SYNC(inode)) | |
159 | nilfs_set_transaction_flag(NILFS_TI_SYNC); | |
160 | ||
161 | nilfs_mark_inode_dirty(inode); | |
162 | ret = nilfs_transaction_commit(inode->i_sb); | |
163 | out: | |
164 | mutex_unlock(&inode->i_mutex); | |
2a79f17e | 165 | mnt_drop_write_file(filp); |
cde98f0f RK |
166 | return ret; |
167 | } | |
168 | ||
169 | static int nilfs_ioctl_getversion(struct inode *inode, void __user *argp) | |
170 | { | |
171 | return put_user(inode->i_generation, (int __user *)argp); | |
172 | } | |
173 | ||
7942b919 KS |
174 | static int nilfs_ioctl_change_cpmode(struct inode *inode, struct file *filp, |
175 | unsigned int cmd, void __user *argp) | |
176 | { | |
e3154e97 | 177 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
7942b919 KS |
178 | struct nilfs_transaction_info ti; |
179 | struct nilfs_cpmode cpmode; | |
180 | int ret; | |
181 | ||
182 | if (!capable(CAP_SYS_ADMIN)) | |
183 | return -EPERM; | |
7512487e | 184 | |
a561be71 | 185 | ret = mnt_want_write_file(filp); |
7512487e RK |
186 | if (ret) |
187 | return ret; | |
188 | ||
189 | ret = -EFAULT; | |
7942b919 | 190 | if (copy_from_user(&cpmode, argp, sizeof(cpmode))) |
7512487e | 191 | goto out; |
7942b919 | 192 | |
572d8b39 | 193 | mutex_lock(&nilfs->ns_snapshot_mount_mutex); |
7512487e | 194 | |
7942b919 KS |
195 | nilfs_transaction_begin(inode->i_sb, &ti, 0); |
196 | ret = nilfs_cpfile_change_cpmode( | |
e3154e97 | 197 | nilfs->ns_cpfile, cpmode.cm_cno, cpmode.cm_mode); |
7512487e | 198 | if (unlikely(ret < 0)) |
47420c79 | 199 | nilfs_transaction_abort(inode->i_sb); |
7512487e RK |
200 | else |
201 | nilfs_transaction_commit(inode->i_sb); /* never fails */ | |
202 | ||
572d8b39 | 203 | mutex_unlock(&nilfs->ns_snapshot_mount_mutex); |
7512487e | 204 | out: |
2a79f17e | 205 | mnt_drop_write_file(filp); |
7942b919 KS |
206 | return ret; |
207 | } | |
208 | ||
209 | static int | |
210 | nilfs_ioctl_delete_checkpoint(struct inode *inode, struct file *filp, | |
211 | unsigned int cmd, void __user *argp) | |
212 | { | |
e3154e97 | 213 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
7942b919 KS |
214 | struct nilfs_transaction_info ti; |
215 | __u64 cno; | |
216 | int ret; | |
217 | ||
218 | if (!capable(CAP_SYS_ADMIN)) | |
219 | return -EPERM; | |
7512487e | 220 | |
a561be71 | 221 | ret = mnt_want_write_file(filp); |
7512487e RK |
222 | if (ret) |
223 | return ret; | |
224 | ||
225 | ret = -EFAULT; | |
7942b919 | 226 | if (copy_from_user(&cno, argp, sizeof(cno))) |
7512487e | 227 | goto out; |
7942b919 KS |
228 | |
229 | nilfs_transaction_begin(inode->i_sb, &ti, 0); | |
e3154e97 | 230 | ret = nilfs_cpfile_delete_checkpoint(nilfs->ns_cpfile, cno); |
7512487e | 231 | if (unlikely(ret < 0)) |
47420c79 | 232 | nilfs_transaction_abort(inode->i_sb); |
7512487e RK |
233 | else |
234 | nilfs_transaction_commit(inode->i_sb); /* never fails */ | |
235 | out: | |
2a79f17e | 236 | mnt_drop_write_file(filp); |
7942b919 KS |
237 | return ret; |
238 | } | |
239 | ||
240 | static ssize_t | |
b028fcfc | 241 | nilfs_ioctl_do_get_cpinfo(struct the_nilfs *nilfs, __u64 *posp, int flags, |
7942b919 KS |
242 | void *buf, size_t size, size_t nmembs) |
243 | { | |
7942b919 KS |
244 | int ret; |
245 | ||
47420c79 | 246 | down_read(&nilfs->ns_segctor_sem); |
47eb6b9c | 247 | ret = nilfs_cpfile_get_cpinfo(nilfs->ns_cpfile, posp, flags, buf, |
003ff182 | 248 | size, nmembs); |
47420c79 | 249 | up_read(&nilfs->ns_segctor_sem); |
7942b919 KS |
250 | return ret; |
251 | } | |
252 | ||
253 | static int nilfs_ioctl_get_cpstat(struct inode *inode, struct file *filp, | |
254 | unsigned int cmd, void __user *argp) | |
255 | { | |
e3154e97 | 256 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
7942b919 | 257 | struct nilfs_cpstat cpstat; |
7942b919 KS |
258 | int ret; |
259 | ||
47420c79 RK |
260 | down_read(&nilfs->ns_segctor_sem); |
261 | ret = nilfs_cpfile_get_stat(nilfs->ns_cpfile, &cpstat); | |
262 | up_read(&nilfs->ns_segctor_sem); | |
7942b919 KS |
263 | if (ret < 0) |
264 | return ret; | |
265 | ||
266 | if (copy_to_user(argp, &cpstat, sizeof(cpstat))) | |
267 | ret = -EFAULT; | |
268 | return ret; | |
269 | } | |
270 | ||
271 | static ssize_t | |
b028fcfc | 272 | nilfs_ioctl_do_get_suinfo(struct the_nilfs *nilfs, __u64 *posp, int flags, |
7942b919 KS |
273 | void *buf, size_t size, size_t nmembs) |
274 | { | |
7942b919 KS |
275 | int ret; |
276 | ||
47420c79 | 277 | down_read(&nilfs->ns_segctor_sem); |
003ff182 RK |
278 | ret = nilfs_sufile_get_suinfo(nilfs->ns_sufile, *posp, buf, size, |
279 | nmembs); | |
47420c79 | 280 | up_read(&nilfs->ns_segctor_sem); |
7942b919 KS |
281 | return ret; |
282 | } | |
283 | ||
284 | static int nilfs_ioctl_get_sustat(struct inode *inode, struct file *filp, | |
285 | unsigned int cmd, void __user *argp) | |
286 | { | |
e3154e97 | 287 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
7942b919 | 288 | struct nilfs_sustat sustat; |
7942b919 KS |
289 | int ret; |
290 | ||
47420c79 RK |
291 | down_read(&nilfs->ns_segctor_sem); |
292 | ret = nilfs_sufile_get_stat(nilfs->ns_sufile, &sustat); | |
293 | up_read(&nilfs->ns_segctor_sem); | |
7942b919 KS |
294 | if (ret < 0) |
295 | return ret; | |
296 | ||
297 | if (copy_to_user(argp, &sustat, sizeof(sustat))) | |
298 | ret = -EFAULT; | |
299 | return ret; | |
300 | } | |
301 | ||
302 | static ssize_t | |
b028fcfc | 303 | nilfs_ioctl_do_get_vinfo(struct the_nilfs *nilfs, __u64 *posp, int flags, |
7942b919 KS |
304 | void *buf, size_t size, size_t nmembs) |
305 | { | |
7942b919 KS |
306 | int ret; |
307 | ||
47420c79 | 308 | down_read(&nilfs->ns_segctor_sem); |
365e215c | 309 | ret = nilfs_dat_get_vinfo(nilfs->ns_dat, buf, size, nmembs); |
47420c79 | 310 | up_read(&nilfs->ns_segctor_sem); |
7942b919 KS |
311 | return ret; |
312 | } | |
313 | ||
314 | static ssize_t | |
b028fcfc | 315 | nilfs_ioctl_do_get_bdescs(struct the_nilfs *nilfs, __u64 *posp, int flags, |
7942b919 KS |
316 | void *buf, size_t size, size_t nmembs) |
317 | { | |
365e215c | 318 | struct nilfs_bmap *bmap = NILFS_I(nilfs->ns_dat)->i_bmap; |
7942b919 KS |
319 | struct nilfs_bdesc *bdescs = buf; |
320 | int ret, i; | |
321 | ||
47eb6b9c | 322 | down_read(&nilfs->ns_segctor_sem); |
7942b919 KS |
323 | for (i = 0; i < nmembs; i++) { |
324 | ret = nilfs_bmap_lookup_at_level(bmap, | |
325 | bdescs[i].bd_offset, | |
326 | bdescs[i].bd_level + 1, | |
327 | &bdescs[i].bd_blocknr); | |
328 | if (ret < 0) { | |
47eb6b9c RK |
329 | if (ret != -ENOENT) { |
330 | up_read(&nilfs->ns_segctor_sem); | |
7942b919 | 331 | return ret; |
47eb6b9c | 332 | } |
7942b919 KS |
333 | bdescs[i].bd_blocknr = 0; |
334 | } | |
335 | } | |
47eb6b9c | 336 | up_read(&nilfs->ns_segctor_sem); |
7942b919 KS |
337 | return nmembs; |
338 | } | |
339 | ||
340 | static int nilfs_ioctl_get_bdescs(struct inode *inode, struct file *filp, | |
341 | unsigned int cmd, void __user *argp) | |
342 | { | |
e3154e97 | 343 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
7942b919 | 344 | struct nilfs_argv argv; |
7942b919 KS |
345 | int ret; |
346 | ||
347 | if (copy_from_user(&argv, argp, sizeof(argv))) | |
348 | return -EFAULT; | |
349 | ||
83aca8f4 RK |
350 | if (argv.v_size != sizeof(struct nilfs_bdesc)) |
351 | return -EINVAL; | |
352 | ||
7942b919 KS |
353 | ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), |
354 | nilfs_ioctl_do_get_bdescs); | |
47420c79 RK |
355 | if (ret < 0) |
356 | return ret; | |
7942b919 KS |
357 | |
358 | if (copy_to_user(argp, &argv, sizeof(argv))) | |
359 | ret = -EFAULT; | |
360 | return ret; | |
361 | } | |
362 | ||
363 | static int nilfs_ioctl_move_inode_block(struct inode *inode, | |
364 | struct nilfs_vdesc *vdesc, | |
365 | struct list_head *buffers) | |
366 | { | |
367 | struct buffer_head *bh; | |
368 | int ret; | |
369 | ||
370 | if (vdesc->vd_flags == 0) | |
371 | ret = nilfs_gccache_submit_read_data( | |
372 | inode, vdesc->vd_offset, vdesc->vd_blocknr, | |
373 | vdesc->vd_vblocknr, &bh); | |
374 | else | |
375 | ret = nilfs_gccache_submit_read_node( | |
376 | inode, vdesc->vd_blocknr, vdesc->vd_vblocknr, &bh); | |
377 | ||
378 | if (unlikely(ret < 0)) { | |
379 | if (ret == -ENOENT) | |
380 | printk(KERN_CRIT | |
381 | "%s: invalid virtual block address (%s): " | |
382 | "ino=%llu, cno=%llu, offset=%llu, " | |
383 | "blocknr=%llu, vblocknr=%llu\n", | |
384 | __func__, vdesc->vd_flags ? "node" : "data", | |
385 | (unsigned long long)vdesc->vd_ino, | |
386 | (unsigned long long)vdesc->vd_cno, | |
387 | (unsigned long long)vdesc->vd_offset, | |
388 | (unsigned long long)vdesc->vd_blocknr, | |
389 | (unsigned long long)vdesc->vd_vblocknr); | |
390 | return ret; | |
391 | } | |
5399dd1f RK |
392 | if (unlikely(!list_empty(&bh->b_assoc_buffers))) { |
393 | printk(KERN_CRIT "%s: conflicting %s buffer: ino=%llu, " | |
394 | "cno=%llu, offset=%llu, blocknr=%llu, vblocknr=%llu\n", | |
395 | __func__, vdesc->vd_flags ? "node" : "data", | |
396 | (unsigned long long)vdesc->vd_ino, | |
397 | (unsigned long long)vdesc->vd_cno, | |
398 | (unsigned long long)vdesc->vd_offset, | |
399 | (unsigned long long)vdesc->vd_blocknr, | |
400 | (unsigned long long)vdesc->vd_vblocknr); | |
401 | brelse(bh); | |
402 | return -EEXIST; | |
403 | } | |
7942b919 KS |
404 | list_add_tail(&bh->b_assoc_buffers, buffers); |
405 | return 0; | |
406 | } | |
407 | ||
263d90ce | 408 | static int nilfs_ioctl_move_blocks(struct super_block *sb, |
4f6b8288 | 409 | struct nilfs_argv *argv, void *buf) |
7942b919 | 410 | { |
4f6b8288 | 411 | size_t nmembs = argv->v_nmembs; |
e3154e97 | 412 | struct the_nilfs *nilfs = sb->s_fs_info; |
7942b919 KS |
413 | struct inode *inode; |
414 | struct nilfs_vdesc *vdesc; | |
415 | struct buffer_head *bh, *n; | |
416 | LIST_HEAD(buffers); | |
417 | ino_t ino; | |
418 | __u64 cno; | |
419 | int i, ret; | |
420 | ||
421 | for (i = 0, vdesc = buf; i < nmembs; ) { | |
422 | ino = vdesc->vd_ino; | |
423 | cno = vdesc->vd_cno; | |
263d90ce | 424 | inode = nilfs_iget_for_gc(sb, ino, cno); |
103cfcf5 DC |
425 | if (IS_ERR(inode)) { |
426 | ret = PTR_ERR(inode); | |
7942b919 KS |
427 | goto failed; |
428 | } | |
947b10ae RK |
429 | if (list_empty(&NILFS_I(inode)->i_dirty)) { |
430 | /* | |
431 | * Add the inode to GC inode list. Garbage Collection | |
432 | * is serialized and no two processes manipulate the | |
433 | * list simultaneously. | |
434 | */ | |
435 | igrab(inode); | |
436 | list_add(&NILFS_I(inode)->i_dirty, | |
437 | &nilfs->ns_gc_inodes); | |
438 | } | |
439 | ||
7942b919 KS |
440 | do { |
441 | ret = nilfs_ioctl_move_inode_block(inode, vdesc, | |
442 | &buffers); | |
263d90ce RK |
443 | if (unlikely(ret < 0)) { |
444 | iput(inode); | |
7942b919 | 445 | goto failed; |
263d90ce | 446 | } |
7942b919 KS |
447 | vdesc++; |
448 | } while (++i < nmembs && | |
449 | vdesc->vd_ino == ino && vdesc->vd_cno == cno); | |
263d90ce RK |
450 | |
451 | iput(inode); /* The inode still remains in GC inode list */ | |
7942b919 KS |
452 | } |
453 | ||
454 | list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) { | |
455 | ret = nilfs_gccache_wait_and_mark_dirty(bh); | |
456 | if (unlikely(ret < 0)) { | |
5399dd1f | 457 | WARN_ON(ret == -EEXIST); |
7942b919 KS |
458 | goto failed; |
459 | } | |
460 | list_del_init(&bh->b_assoc_buffers); | |
7942b919 KS |
461 | brelse(bh); |
462 | } | |
463 | return nmembs; | |
464 | ||
465 | failed: | |
466 | list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) { | |
467 | list_del_init(&bh->b_assoc_buffers); | |
7942b919 KS |
468 | brelse(bh); |
469 | } | |
470 | return ret; | |
471 | } | |
472 | ||
4f6b8288 RK |
473 | static int nilfs_ioctl_delete_checkpoints(struct the_nilfs *nilfs, |
474 | struct nilfs_argv *argv, void *buf) | |
7942b919 | 475 | { |
4f6b8288 | 476 | size_t nmembs = argv->v_nmembs; |
7942b919 KS |
477 | struct inode *cpfile = nilfs->ns_cpfile; |
478 | struct nilfs_period *periods = buf; | |
479 | int ret, i; | |
480 | ||
481 | for (i = 0; i < nmembs; i++) { | |
482 | ret = nilfs_cpfile_delete_checkpoints( | |
483 | cpfile, periods[i].p_start, periods[i].p_end); | |
484 | if (ret < 0) | |
485 | return ret; | |
486 | } | |
487 | return nmembs; | |
488 | } | |
489 | ||
4f6b8288 RK |
490 | static int nilfs_ioctl_free_vblocknrs(struct the_nilfs *nilfs, |
491 | struct nilfs_argv *argv, void *buf) | |
7942b919 | 492 | { |
4f6b8288 RK |
493 | size_t nmembs = argv->v_nmembs; |
494 | int ret; | |
7942b919 | 495 | |
365e215c | 496 | ret = nilfs_dat_freev(nilfs->ns_dat, buf, nmembs); |
7942b919 KS |
497 | |
498 | return (ret < 0) ? ret : nmembs; | |
499 | } | |
500 | ||
4f6b8288 RK |
501 | static int nilfs_ioctl_mark_blocks_dirty(struct the_nilfs *nilfs, |
502 | struct nilfs_argv *argv, void *buf) | |
7942b919 | 503 | { |
4f6b8288 | 504 | size_t nmembs = argv->v_nmembs; |
365e215c | 505 | struct nilfs_bmap *bmap = NILFS_I(nilfs->ns_dat)->i_bmap; |
7942b919 KS |
506 | struct nilfs_bdesc *bdescs = buf; |
507 | int ret, i; | |
508 | ||
509 | for (i = 0; i < nmembs; i++) { | |
510 | /* XXX: use macro or inline func to check liveness */ | |
511 | ret = nilfs_bmap_lookup_at_level(bmap, | |
512 | bdescs[i].bd_offset, | |
513 | bdescs[i].bd_level + 1, | |
514 | &bdescs[i].bd_blocknr); | |
515 | if (ret < 0) { | |
516 | if (ret != -ENOENT) | |
517 | return ret; | |
518 | bdescs[i].bd_blocknr = 0; | |
519 | } | |
520 | if (bdescs[i].bd_blocknr != bdescs[i].bd_oblocknr) | |
521 | /* skip dead block */ | |
522 | continue; | |
523 | if (bdescs[i].bd_level == 0) { | |
365e215c | 524 | ret = nilfs_mdt_mark_block_dirty(nilfs->ns_dat, |
7942b919 KS |
525 | bdescs[i].bd_offset); |
526 | if (ret < 0) { | |
1f5abe7e | 527 | WARN_ON(ret == -ENOENT); |
7942b919 KS |
528 | return ret; |
529 | } | |
530 | } else { | |
531 | ret = nilfs_bmap_mark(bmap, bdescs[i].bd_offset, | |
532 | bdescs[i].bd_level); | |
533 | if (ret < 0) { | |
1f5abe7e | 534 | WARN_ON(ret == -ENOENT); |
7942b919 KS |
535 | return ret; |
536 | } | |
537 | } | |
538 | } | |
539 | return nmembs; | |
540 | } | |
541 | ||
7942b919 | 542 | int nilfs_ioctl_prepare_clean_segments(struct the_nilfs *nilfs, |
4f6b8288 | 543 | struct nilfs_argv *argv, void **kbufs) |
7942b919 | 544 | { |
1f5abe7e | 545 | const char *msg; |
4f6b8288 | 546 | int ret; |
7942b919 | 547 | |
4f6b8288 | 548 | ret = nilfs_ioctl_delete_checkpoints(nilfs, &argv[1], kbufs[1]); |
1f5abe7e RK |
549 | if (ret < 0) { |
550 | /* | |
551 | * can safely abort because checkpoints can be removed | |
552 | * independently. | |
553 | */ | |
554 | msg = "cannot delete checkpoints"; | |
555 | goto failed; | |
556 | } | |
4f6b8288 | 557 | ret = nilfs_ioctl_free_vblocknrs(nilfs, &argv[2], kbufs[2]); |
1f5abe7e RK |
558 | if (ret < 0) { |
559 | /* | |
560 | * can safely abort because DAT file is updated atomically | |
561 | * using a copy-on-write technique. | |
562 | */ | |
563 | msg = "cannot delete virtual blocks from DAT file"; | |
564 | goto failed; | |
565 | } | |
4f6b8288 | 566 | ret = nilfs_ioctl_mark_blocks_dirty(nilfs, &argv[3], kbufs[3]); |
1f5abe7e RK |
567 | if (ret < 0) { |
568 | /* | |
569 | * can safely abort because the operation is nondestructive. | |
570 | */ | |
571 | msg = "cannot mark copying blocks dirty"; | |
572 | goto failed; | |
573 | } | |
7942b919 KS |
574 | return 0; |
575 | ||
1f5abe7e | 576 | failed: |
1f5abe7e RK |
577 | printk(KERN_ERR "NILFS: GC failed during preparation: %s: err=%d\n", |
578 | msg, ret); | |
7942b919 KS |
579 | return ret; |
580 | } | |
581 | ||
582 | static int nilfs_ioctl_clean_segments(struct inode *inode, struct file *filp, | |
583 | unsigned int cmd, void __user *argp) | |
584 | { | |
4f6b8288 | 585 | struct nilfs_argv argv[5]; |
33e189bd | 586 | static const size_t argsz[5] = { |
4f6b8288 RK |
587 | sizeof(struct nilfs_vdesc), |
588 | sizeof(struct nilfs_period), | |
589 | sizeof(__u64), | |
590 | sizeof(struct nilfs_bdesc), | |
591 | sizeof(__u64), | |
592 | }; | |
593 | void __user *base; | |
594 | void *kbufs[5]; | |
595 | struct the_nilfs *nilfs; | |
596 | size_t len, nsegs; | |
597 | int n, ret; | |
598 | ||
7942b919 KS |
599 | if (!capable(CAP_SYS_ADMIN)) |
600 | return -EPERM; | |
4f6b8288 | 601 | |
a561be71 | 602 | ret = mnt_want_write_file(filp); |
7512487e RK |
603 | if (ret) |
604 | return ret; | |
605 | ||
606 | ret = -EFAULT; | |
4f6b8288 | 607 | if (copy_from_user(argv, argp, sizeof(argv))) |
7512487e | 608 | goto out; |
4f6b8288 | 609 | |
7512487e | 610 | ret = -EINVAL; |
4f6b8288 RK |
611 | nsegs = argv[4].v_nmembs; |
612 | if (argv[4].v_size != argsz[4]) | |
7512487e | 613 | goto out; |
1ecd3c7e XW |
614 | if (nsegs > UINT_MAX / sizeof(__u64)) |
615 | goto out; | |
7512487e | 616 | |
4f6b8288 RK |
617 | /* |
618 | * argv[4] points to segment numbers this ioctl cleans. We | |
619 | * use kmalloc() for its buffer because memory used for the | |
620 | * segment numbers is enough small. | |
621 | */ | |
622 | kbufs[4] = memdup_user((void __user *)(unsigned long)argv[4].v_base, | |
623 | nsegs * sizeof(__u64)); | |
7512487e RK |
624 | if (IS_ERR(kbufs[4])) { |
625 | ret = PTR_ERR(kbufs[4]); | |
626 | goto out; | |
627 | } | |
e3154e97 | 628 | nilfs = inode->i_sb->s_fs_info; |
4f6b8288 RK |
629 | |
630 | for (n = 0; n < 4; n++) { | |
631 | ret = -EINVAL; | |
632 | if (argv[n].v_size != argsz[n]) | |
633 | goto out_free; | |
634 | ||
635 | if (argv[n].v_nmembs > nsegs * nilfs->ns_blocks_per_segment) | |
636 | goto out_free; | |
637 | ||
481fe17e HC |
638 | if (argv[n].v_nmembs >= UINT_MAX / argv[n].v_size) |
639 | goto out_free; | |
640 | ||
4f6b8288 RK |
641 | len = argv[n].v_size * argv[n].v_nmembs; |
642 | base = (void __user *)(unsigned long)argv[n].v_base; | |
643 | if (len == 0) { | |
644 | kbufs[n] = NULL; | |
645 | continue; | |
646 | } | |
647 | ||
648 | kbufs[n] = vmalloc(len); | |
649 | if (!kbufs[n]) { | |
650 | ret = -ENOMEM; | |
651 | goto out_free; | |
652 | } | |
653 | if (copy_from_user(kbufs[n], base, len)) { | |
654 | ret = -EFAULT; | |
655 | vfree(kbufs[n]); | |
656 | goto out_free; | |
657 | } | |
658 | } | |
659 | ||
1cf58fa8 | 660 | /* |
263d90ce | 661 | * nilfs_ioctl_move_blocks() will call nilfs_iget_for_gc(), |
1cf58fa8 JS |
662 | * which will operates an inode list without blocking. |
663 | * To protect the list from concurrent operations, | |
664 | * nilfs_ioctl_move_blocks should be atomic operation. | |
665 | */ | |
666 | if (test_and_set_bit(THE_NILFS_GC_RUNNING, &nilfs->ns_flags)) { | |
667 | ret = -EBUSY; | |
668 | goto out_free; | |
669 | } | |
670 | ||
263d90ce | 671 | ret = nilfs_ioctl_move_blocks(inode->i_sb, &argv[0], kbufs[0]); |
1cf58fa8 JS |
672 | if (ret < 0) |
673 | printk(KERN_ERR "NILFS: GC failed during preparation: " | |
674 | "cannot read source blocks: err=%d\n", ret); | |
a9bae189 VD |
675 | else { |
676 | if (nilfs_sb_need_update(nilfs)) | |
677 | set_nilfs_discontinued(nilfs); | |
1cf58fa8 | 678 | ret = nilfs_clean_segments(inode->i_sb, argv, kbufs); |
a9bae189 | 679 | } |
1cf58fa8 | 680 | |
263d90ce | 681 | nilfs_remove_all_gcinodes(nilfs); |
1cf58fa8 | 682 | clear_nilfs_gc_running(nilfs); |
4f6b8288 | 683 | |
7512487e | 684 | out_free: |
d5046853 | 685 | while (--n >= 0) |
4f6b8288 RK |
686 | vfree(kbufs[n]); |
687 | kfree(kbufs[4]); | |
7512487e | 688 | out: |
2a79f17e | 689 | mnt_drop_write_file(filp); |
4f6b8288 | 690 | return ret; |
7942b919 KS |
691 | } |
692 | ||
693 | static int nilfs_ioctl_sync(struct inode *inode, struct file *filp, | |
694 | unsigned int cmd, void __user *argp) | |
695 | { | |
696 | __u64 cno; | |
697 | int ret; | |
0d561f12 | 698 | struct the_nilfs *nilfs; |
7942b919 KS |
699 | |
700 | ret = nilfs_construct_segment(inode->i_sb); | |
701 | if (ret < 0) | |
702 | return ret; | |
703 | ||
11475975 RK |
704 | nilfs = inode->i_sb->s_fs_info; |
705 | if (nilfs_test_opt(nilfs, BARRIER)) { | |
706 | ret = blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL); | |
707 | if (ret == -EIO) | |
708 | return ret; | |
709 | } | |
710 | ||
7942b919 | 711 | if (argp != NULL) { |
0d561f12 JS |
712 | down_read(&nilfs->ns_segctor_sem); |
713 | cno = nilfs->ns_cno - 1; | |
714 | up_read(&nilfs->ns_segctor_sem); | |
7942b919 KS |
715 | if (copy_to_user(argp, &cno, sizeof(cno))) |
716 | return -EFAULT; | |
717 | } | |
718 | return 0; | |
719 | } | |
720 | ||
4e33f9ea RK |
721 | static int nilfs_ioctl_resize(struct inode *inode, struct file *filp, |
722 | void __user *argp) | |
723 | { | |
724 | __u64 newsize; | |
725 | int ret = -EPERM; | |
726 | ||
727 | if (!capable(CAP_SYS_ADMIN)) | |
728 | goto out; | |
729 | ||
a561be71 | 730 | ret = mnt_want_write_file(filp); |
4e33f9ea RK |
731 | if (ret) |
732 | goto out; | |
733 | ||
734 | ret = -EFAULT; | |
735 | if (copy_from_user(&newsize, argp, sizeof(newsize))) | |
736 | goto out_drop_write; | |
737 | ||
738 | ret = nilfs_resize_fs(inode->i_sb, newsize); | |
739 | ||
740 | out_drop_write: | |
2a79f17e | 741 | mnt_drop_write_file(filp); |
4e33f9ea RK |
742 | out: |
743 | return ret; | |
744 | } | |
745 | ||
619205da RK |
746 | static int nilfs_ioctl_set_alloc_range(struct inode *inode, void __user *argp) |
747 | { | |
748 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; | |
749 | __u64 range[2]; | |
750 | __u64 minseg, maxseg; | |
751 | unsigned long segbytes; | |
752 | int ret = -EPERM; | |
753 | ||
754 | if (!capable(CAP_SYS_ADMIN)) | |
755 | goto out; | |
756 | ||
757 | ret = -EFAULT; | |
758 | if (copy_from_user(range, argp, sizeof(__u64[2]))) | |
759 | goto out; | |
760 | ||
761 | ret = -ERANGE; | |
762 | if (range[1] > i_size_read(inode->i_sb->s_bdev->bd_inode)) | |
763 | goto out; | |
764 | ||
765 | segbytes = nilfs->ns_blocks_per_segment * nilfs->ns_blocksize; | |
766 | ||
767 | minseg = range[0] + segbytes - 1; | |
768 | do_div(minseg, segbytes); | |
769 | maxseg = NILFS_SB2_OFFSET_BYTES(range[1]); | |
770 | do_div(maxseg, segbytes); | |
771 | maxseg--; | |
772 | ||
773 | ret = nilfs_sufile_set_alloc_range(nilfs->ns_sufile, minseg, maxseg); | |
774 | out: | |
775 | return ret; | |
776 | } | |
777 | ||
47eb6b9c RK |
778 | static int nilfs_ioctl_get_info(struct inode *inode, struct file *filp, |
779 | unsigned int cmd, void __user *argp, | |
83aca8f4 | 780 | size_t membsz, |
47eb6b9c RK |
781 | ssize_t (*dofunc)(struct the_nilfs *, |
782 | __u64 *, int, | |
783 | void *, size_t, size_t)) | |
784 | ||
785 | { | |
e3154e97 | 786 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
47eb6b9c RK |
787 | struct nilfs_argv argv; |
788 | int ret; | |
789 | ||
790 | if (copy_from_user(&argv, argp, sizeof(argv))) | |
791 | return -EFAULT; | |
792 | ||
003ff182 | 793 | if (argv.v_size < membsz) |
83aca8f4 RK |
794 | return -EINVAL; |
795 | ||
47eb6b9c RK |
796 | ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), dofunc); |
797 | if (ret < 0) | |
798 | return ret; | |
799 | ||
800 | if (copy_to_user(argp, &argv, sizeof(argv))) | |
801 | ret = -EFAULT; | |
802 | return ret; | |
803 | } | |
804 | ||
7a946193 | 805 | long nilfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
7942b919 | 806 | { |
496ad9aa | 807 | struct inode *inode = file_inode(filp); |
75323400 | 808 | void __user *argp = (void __user *)arg; |
7942b919 KS |
809 | |
810 | switch (cmd) { | |
cde98f0f RK |
811 | case FS_IOC_GETFLAGS: |
812 | return nilfs_ioctl_getflags(inode, argp); | |
813 | case FS_IOC_SETFLAGS: | |
814 | return nilfs_ioctl_setflags(inode, filp, argp); | |
815 | case FS_IOC_GETVERSION: | |
816 | return nilfs_ioctl_getversion(inode, argp); | |
7942b919 KS |
817 | case NILFS_IOCTL_CHANGE_CPMODE: |
818 | return nilfs_ioctl_change_cpmode(inode, filp, cmd, argp); | |
819 | case NILFS_IOCTL_DELETE_CHECKPOINT: | |
820 | return nilfs_ioctl_delete_checkpoint(inode, filp, cmd, argp); | |
821 | case NILFS_IOCTL_GET_CPINFO: | |
47eb6b9c | 822 | return nilfs_ioctl_get_info(inode, filp, cmd, argp, |
83aca8f4 | 823 | sizeof(struct nilfs_cpinfo), |
47eb6b9c | 824 | nilfs_ioctl_do_get_cpinfo); |
7942b919 KS |
825 | case NILFS_IOCTL_GET_CPSTAT: |
826 | return nilfs_ioctl_get_cpstat(inode, filp, cmd, argp); | |
827 | case NILFS_IOCTL_GET_SUINFO: | |
47eb6b9c | 828 | return nilfs_ioctl_get_info(inode, filp, cmd, argp, |
83aca8f4 | 829 | sizeof(struct nilfs_suinfo), |
47eb6b9c | 830 | nilfs_ioctl_do_get_suinfo); |
7942b919 KS |
831 | case NILFS_IOCTL_GET_SUSTAT: |
832 | return nilfs_ioctl_get_sustat(inode, filp, cmd, argp); | |
833 | case NILFS_IOCTL_GET_VINFO: | |
47eb6b9c | 834 | return nilfs_ioctl_get_info(inode, filp, cmd, argp, |
83aca8f4 | 835 | sizeof(struct nilfs_vinfo), |
47eb6b9c | 836 | nilfs_ioctl_do_get_vinfo); |
7942b919 KS |
837 | case NILFS_IOCTL_GET_BDESCS: |
838 | return nilfs_ioctl_get_bdescs(inode, filp, cmd, argp); | |
839 | case NILFS_IOCTL_CLEAN_SEGMENTS: | |
840 | return nilfs_ioctl_clean_segments(inode, filp, cmd, argp); | |
7942b919 KS |
841 | case NILFS_IOCTL_SYNC: |
842 | return nilfs_ioctl_sync(inode, filp, cmd, argp); | |
4e33f9ea RK |
843 | case NILFS_IOCTL_RESIZE: |
844 | return nilfs_ioctl_resize(inode, filp, argp); | |
619205da RK |
845 | case NILFS_IOCTL_SET_ALLOC_RANGE: |
846 | return nilfs_ioctl_set_alloc_range(inode, argp); | |
7942b919 KS |
847 | default: |
848 | return -ENOTTY; | |
849 | } | |
850 | } | |
828b1c50 RK |
851 | |
852 | #ifdef CONFIG_COMPAT | |
853 | long nilfs_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) | |
854 | { | |
855 | switch (cmd) { | |
856 | case FS_IOC32_GETFLAGS: | |
857 | cmd = FS_IOC_GETFLAGS; | |
858 | break; | |
859 | case FS_IOC32_SETFLAGS: | |
860 | cmd = FS_IOC_SETFLAGS; | |
861 | break; | |
862 | case FS_IOC32_GETVERSION: | |
863 | cmd = FS_IOC_GETVERSION; | |
864 | break; | |
695c60f2 TM |
865 | case NILFS_IOCTL_CHANGE_CPMODE: |
866 | case NILFS_IOCTL_DELETE_CHECKPOINT: | |
867 | case NILFS_IOCTL_GET_CPINFO: | |
868 | case NILFS_IOCTL_GET_CPSTAT: | |
869 | case NILFS_IOCTL_GET_SUINFO: | |
870 | case NILFS_IOCTL_GET_SUSTAT: | |
871 | case NILFS_IOCTL_GET_VINFO: | |
872 | case NILFS_IOCTL_GET_BDESCS: | |
873 | case NILFS_IOCTL_CLEAN_SEGMENTS: | |
874 | case NILFS_IOCTL_SYNC: | |
875 | case NILFS_IOCTL_RESIZE: | |
876 | case NILFS_IOCTL_SET_ALLOC_RANGE: | |
877 | break; | |
828b1c50 RK |
878 | default: |
879 | return -ENOIOCTLCMD; | |
880 | } | |
881 | return nilfs_ioctl(filp, cmd, (unsigned long)compat_ptr(arg)); | |
882 | } | |
883 | #endif |