Commit | Line | Data |
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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> | |
25 | #include <linux/smp_lock.h> /* lock_kernel(), unlock_kernel() */ | |
26 | #include <linux/capability.h> /* capable() */ | |
27 | #include <linux/uaccess.h> /* copy_from_user(), copy_to_user() */ | |
4f6b8288 | 28 | #include <linux/vmalloc.h> |
7942b919 KS |
29 | #include <linux/nilfs2_fs.h> |
30 | #include "nilfs.h" | |
31 | #include "segment.h" | |
32 | #include "bmap.h" | |
33 | #include "cpfile.h" | |
34 | #include "sufile.h" | |
35 | #include "dat.h" | |
36 | ||
37 | ||
7942b919 KS |
38 | static int nilfs_ioctl_wrap_copy(struct the_nilfs *nilfs, |
39 | struct nilfs_argv *argv, int dir, | |
40 | ssize_t (*dofunc)(struct the_nilfs *, | |
b028fcfc | 41 | __u64 *, int, |
7942b919 KS |
42 | void *, size_t, size_t)) |
43 | { | |
44 | void *buf; | |
dc498d09 | 45 | void __user *base = (void __user *)(unsigned long)argv->v_base; |
3358b4aa | 46 | size_t maxmembs, total, n; |
7942b919 KS |
47 | ssize_t nr; |
48 | int ret, i; | |
b028fcfc | 49 | __u64 pos, ppos; |
7942b919 KS |
50 | |
51 | if (argv->v_nmembs == 0) | |
52 | return 0; | |
53 | ||
3358b4aa RK |
54 | if (argv->v_size > PAGE_SIZE) |
55 | return -EINVAL; | |
56 | ||
57 | buf = (void *)__get_free_pages(GFP_NOFS, 0); | |
58 | if (unlikely(!buf)) | |
7942b919 | 59 | return -ENOMEM; |
3358b4aa | 60 | maxmembs = PAGE_SIZE / argv->v_size; |
7942b919 KS |
61 | |
62 | ret = 0; | |
63 | total = 0; | |
b028fcfc | 64 | pos = argv->v_index; |
7942b919 KS |
65 | for (i = 0; i < argv->v_nmembs; i += n) { |
66 | n = (argv->v_nmembs - i < maxmembs) ? | |
67 | argv->v_nmembs - i : maxmembs; | |
68 | if ((dir & _IOC_WRITE) && | |
dc498d09 RK |
69 | copy_from_user(buf, base + argv->v_size * i, |
70 | argv->v_size * n)) { | |
7942b919 KS |
71 | ret = -EFAULT; |
72 | break; | |
73 | } | |
b028fcfc | 74 | ppos = pos; |
8acfbf09 | 75 | nr = dofunc(nilfs, &pos, argv->v_flags, buf, argv->v_size, |
b028fcfc | 76 | n); |
7942b919 KS |
77 | if (nr < 0) { |
78 | ret = nr; | |
79 | break; | |
80 | } | |
81 | if ((dir & _IOC_READ) && | |
dc498d09 RK |
82 | copy_to_user(base + argv->v_size * i, buf, |
83 | argv->v_size * nr)) { | |
7942b919 KS |
84 | ret = -EFAULT; |
85 | break; | |
86 | } | |
87 | total += nr; | |
b028fcfc RK |
88 | if ((size_t)nr < n) |
89 | break; | |
90 | if (pos == ppos) | |
91 | pos += n; | |
7942b919 KS |
92 | } |
93 | argv->v_nmembs = total; | |
94 | ||
3358b4aa | 95 | free_pages((unsigned long)buf, 0); |
7942b919 KS |
96 | return ret; |
97 | } | |
98 | ||
99 | static int nilfs_ioctl_change_cpmode(struct inode *inode, struct file *filp, | |
100 | unsigned int cmd, void __user *argp) | |
101 | { | |
102 | struct inode *cpfile = NILFS_SB(inode->i_sb)->s_nilfs->ns_cpfile; | |
103 | struct nilfs_transaction_info ti; | |
104 | struct nilfs_cpmode cpmode; | |
105 | int ret; | |
106 | ||
107 | if (!capable(CAP_SYS_ADMIN)) | |
108 | return -EPERM; | |
109 | if (copy_from_user(&cpmode, argp, sizeof(cpmode))) | |
110 | return -EFAULT; | |
111 | ||
112 | nilfs_transaction_begin(inode->i_sb, &ti, 0); | |
113 | ret = nilfs_cpfile_change_cpmode( | |
114 | cpfile, cpmode.cm_cno, cpmode.cm_mode); | |
47420c79 RK |
115 | if (unlikely(ret < 0)) { |
116 | nilfs_transaction_abort(inode->i_sb); | |
117 | return ret; | |
118 | } | |
119 | nilfs_transaction_commit(inode->i_sb); /* never fails */ | |
7942b919 KS |
120 | return ret; |
121 | } | |
122 | ||
123 | static int | |
124 | nilfs_ioctl_delete_checkpoint(struct inode *inode, struct file *filp, | |
125 | unsigned int cmd, void __user *argp) | |
126 | { | |
127 | struct inode *cpfile = NILFS_SB(inode->i_sb)->s_nilfs->ns_cpfile; | |
128 | struct nilfs_transaction_info ti; | |
129 | __u64 cno; | |
130 | int ret; | |
131 | ||
132 | if (!capable(CAP_SYS_ADMIN)) | |
133 | return -EPERM; | |
134 | if (copy_from_user(&cno, argp, sizeof(cno))) | |
135 | return -EFAULT; | |
136 | ||
137 | nilfs_transaction_begin(inode->i_sb, &ti, 0); | |
138 | ret = nilfs_cpfile_delete_checkpoint(cpfile, cno); | |
47420c79 RK |
139 | if (unlikely(ret < 0)) { |
140 | nilfs_transaction_abort(inode->i_sb); | |
141 | return ret; | |
142 | } | |
143 | nilfs_transaction_commit(inode->i_sb); /* never fails */ | |
7942b919 KS |
144 | return ret; |
145 | } | |
146 | ||
147 | static ssize_t | |
b028fcfc | 148 | nilfs_ioctl_do_get_cpinfo(struct the_nilfs *nilfs, __u64 *posp, int flags, |
7942b919 KS |
149 | void *buf, size_t size, size_t nmembs) |
150 | { | |
7942b919 KS |
151 | int ret; |
152 | ||
47420c79 | 153 | down_read(&nilfs->ns_segctor_sem); |
47eb6b9c | 154 | ret = nilfs_cpfile_get_cpinfo(nilfs->ns_cpfile, posp, flags, buf, |
003ff182 | 155 | size, nmembs); |
47420c79 | 156 | up_read(&nilfs->ns_segctor_sem); |
7942b919 KS |
157 | return ret; |
158 | } | |
159 | ||
160 | static int nilfs_ioctl_get_cpstat(struct inode *inode, struct file *filp, | |
161 | unsigned int cmd, void __user *argp) | |
162 | { | |
47420c79 | 163 | struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs; |
7942b919 | 164 | struct nilfs_cpstat cpstat; |
7942b919 KS |
165 | int ret; |
166 | ||
47420c79 RK |
167 | down_read(&nilfs->ns_segctor_sem); |
168 | ret = nilfs_cpfile_get_stat(nilfs->ns_cpfile, &cpstat); | |
169 | up_read(&nilfs->ns_segctor_sem); | |
7942b919 KS |
170 | if (ret < 0) |
171 | return ret; | |
172 | ||
173 | if (copy_to_user(argp, &cpstat, sizeof(cpstat))) | |
174 | ret = -EFAULT; | |
175 | return ret; | |
176 | } | |
177 | ||
178 | static ssize_t | |
b028fcfc | 179 | nilfs_ioctl_do_get_suinfo(struct the_nilfs *nilfs, __u64 *posp, int flags, |
7942b919 KS |
180 | void *buf, size_t size, size_t nmembs) |
181 | { | |
7942b919 KS |
182 | int ret; |
183 | ||
47420c79 | 184 | down_read(&nilfs->ns_segctor_sem); |
003ff182 RK |
185 | ret = nilfs_sufile_get_suinfo(nilfs->ns_sufile, *posp, buf, size, |
186 | nmembs); | |
47420c79 | 187 | up_read(&nilfs->ns_segctor_sem); |
7942b919 KS |
188 | return ret; |
189 | } | |
190 | ||
191 | static int nilfs_ioctl_get_sustat(struct inode *inode, struct file *filp, | |
192 | unsigned int cmd, void __user *argp) | |
193 | { | |
47420c79 | 194 | struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs; |
7942b919 | 195 | struct nilfs_sustat sustat; |
7942b919 KS |
196 | int ret; |
197 | ||
47420c79 RK |
198 | down_read(&nilfs->ns_segctor_sem); |
199 | ret = nilfs_sufile_get_stat(nilfs->ns_sufile, &sustat); | |
200 | up_read(&nilfs->ns_segctor_sem); | |
7942b919 KS |
201 | if (ret < 0) |
202 | return ret; | |
203 | ||
204 | if (copy_to_user(argp, &sustat, sizeof(sustat))) | |
205 | ret = -EFAULT; | |
206 | return ret; | |
207 | } | |
208 | ||
209 | static ssize_t | |
b028fcfc | 210 | nilfs_ioctl_do_get_vinfo(struct the_nilfs *nilfs, __u64 *posp, int flags, |
7942b919 KS |
211 | void *buf, size_t size, size_t nmembs) |
212 | { | |
7942b919 KS |
213 | int ret; |
214 | ||
47420c79 | 215 | down_read(&nilfs->ns_segctor_sem); |
003ff182 | 216 | ret = nilfs_dat_get_vinfo(nilfs_dat_inode(nilfs), buf, size, nmembs); |
47420c79 | 217 | up_read(&nilfs->ns_segctor_sem); |
7942b919 KS |
218 | return ret; |
219 | } | |
220 | ||
221 | static ssize_t | |
b028fcfc | 222 | nilfs_ioctl_do_get_bdescs(struct the_nilfs *nilfs, __u64 *posp, int flags, |
7942b919 KS |
223 | void *buf, size_t size, size_t nmembs) |
224 | { | |
225 | struct inode *dat = nilfs_dat_inode(nilfs); | |
226 | struct nilfs_bmap *bmap = NILFS_I(dat)->i_bmap; | |
227 | struct nilfs_bdesc *bdescs = buf; | |
228 | int ret, i; | |
229 | ||
47eb6b9c | 230 | down_read(&nilfs->ns_segctor_sem); |
7942b919 KS |
231 | for (i = 0; i < nmembs; i++) { |
232 | ret = nilfs_bmap_lookup_at_level(bmap, | |
233 | bdescs[i].bd_offset, | |
234 | bdescs[i].bd_level + 1, | |
235 | &bdescs[i].bd_blocknr); | |
236 | if (ret < 0) { | |
47eb6b9c RK |
237 | if (ret != -ENOENT) { |
238 | up_read(&nilfs->ns_segctor_sem); | |
7942b919 | 239 | return ret; |
47eb6b9c | 240 | } |
7942b919 KS |
241 | bdescs[i].bd_blocknr = 0; |
242 | } | |
243 | } | |
47eb6b9c | 244 | up_read(&nilfs->ns_segctor_sem); |
7942b919 KS |
245 | return nmembs; |
246 | } | |
247 | ||
248 | static int nilfs_ioctl_get_bdescs(struct inode *inode, struct file *filp, | |
249 | unsigned int cmd, void __user *argp) | |
250 | { | |
251 | struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs; | |
252 | struct nilfs_argv argv; | |
7942b919 KS |
253 | int ret; |
254 | ||
255 | if (copy_from_user(&argv, argp, sizeof(argv))) | |
256 | return -EFAULT; | |
257 | ||
83aca8f4 RK |
258 | if (argv.v_size != sizeof(struct nilfs_bdesc)) |
259 | return -EINVAL; | |
260 | ||
7942b919 KS |
261 | ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), |
262 | nilfs_ioctl_do_get_bdescs); | |
47420c79 RK |
263 | if (ret < 0) |
264 | return ret; | |
7942b919 KS |
265 | |
266 | if (copy_to_user(argp, &argv, sizeof(argv))) | |
267 | ret = -EFAULT; | |
268 | return ret; | |
269 | } | |
270 | ||
271 | static int nilfs_ioctl_move_inode_block(struct inode *inode, | |
272 | struct nilfs_vdesc *vdesc, | |
273 | struct list_head *buffers) | |
274 | { | |
275 | struct buffer_head *bh; | |
276 | int ret; | |
277 | ||
278 | if (vdesc->vd_flags == 0) | |
279 | ret = nilfs_gccache_submit_read_data( | |
280 | inode, vdesc->vd_offset, vdesc->vd_blocknr, | |
281 | vdesc->vd_vblocknr, &bh); | |
282 | else | |
283 | ret = nilfs_gccache_submit_read_node( | |
284 | inode, vdesc->vd_blocknr, vdesc->vd_vblocknr, &bh); | |
285 | ||
286 | if (unlikely(ret < 0)) { | |
287 | if (ret == -ENOENT) | |
288 | printk(KERN_CRIT | |
289 | "%s: invalid virtual block address (%s): " | |
290 | "ino=%llu, cno=%llu, offset=%llu, " | |
291 | "blocknr=%llu, vblocknr=%llu\n", | |
292 | __func__, vdesc->vd_flags ? "node" : "data", | |
293 | (unsigned long long)vdesc->vd_ino, | |
294 | (unsigned long long)vdesc->vd_cno, | |
295 | (unsigned long long)vdesc->vd_offset, | |
296 | (unsigned long long)vdesc->vd_blocknr, | |
297 | (unsigned long long)vdesc->vd_vblocknr); | |
298 | return ret; | |
299 | } | |
300 | bh->b_private = vdesc; | |
301 | list_add_tail(&bh->b_assoc_buffers, buffers); | |
302 | return 0; | |
303 | } | |
304 | ||
4f6b8288 RK |
305 | static int nilfs_ioctl_move_blocks(struct the_nilfs *nilfs, |
306 | struct nilfs_argv *argv, void *buf) | |
7942b919 | 307 | { |
4f6b8288 | 308 | size_t nmembs = argv->v_nmembs; |
7942b919 KS |
309 | struct inode *inode; |
310 | struct nilfs_vdesc *vdesc; | |
311 | struct buffer_head *bh, *n; | |
312 | LIST_HEAD(buffers); | |
313 | ino_t ino; | |
314 | __u64 cno; | |
315 | int i, ret; | |
316 | ||
317 | for (i = 0, vdesc = buf; i < nmembs; ) { | |
318 | ino = vdesc->vd_ino; | |
319 | cno = vdesc->vd_cno; | |
320 | inode = nilfs_gc_iget(nilfs, ino, cno); | |
321 | if (unlikely(inode == NULL)) { | |
322 | ret = -ENOMEM; | |
323 | goto failed; | |
324 | } | |
325 | do { | |
326 | ret = nilfs_ioctl_move_inode_block(inode, vdesc, | |
327 | &buffers); | |
328 | if (unlikely(ret < 0)) | |
329 | goto failed; | |
330 | vdesc++; | |
331 | } while (++i < nmembs && | |
332 | vdesc->vd_ino == ino && vdesc->vd_cno == cno); | |
333 | } | |
334 | ||
335 | list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) { | |
336 | ret = nilfs_gccache_wait_and_mark_dirty(bh); | |
337 | if (unlikely(ret < 0)) { | |
338 | if (ret == -EEXIST) { | |
339 | vdesc = bh->b_private; | |
340 | printk(KERN_CRIT | |
341 | "%s: conflicting %s buffer: " | |
342 | "ino=%llu, cno=%llu, offset=%llu, " | |
343 | "blocknr=%llu, vblocknr=%llu\n", | |
344 | __func__, | |
345 | vdesc->vd_flags ? "node" : "data", | |
346 | (unsigned long long)vdesc->vd_ino, | |
347 | (unsigned long long)vdesc->vd_cno, | |
348 | (unsigned long long)vdesc->vd_offset, | |
349 | (unsigned long long)vdesc->vd_blocknr, | |
350 | (unsigned long long)vdesc->vd_vblocknr); | |
351 | } | |
352 | goto failed; | |
353 | } | |
354 | list_del_init(&bh->b_assoc_buffers); | |
355 | bh->b_private = NULL; | |
356 | brelse(bh); | |
357 | } | |
358 | return nmembs; | |
359 | ||
360 | failed: | |
361 | list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) { | |
362 | list_del_init(&bh->b_assoc_buffers); | |
363 | bh->b_private = NULL; | |
364 | brelse(bh); | |
365 | } | |
366 | return ret; | |
367 | } | |
368 | ||
4f6b8288 RK |
369 | static int nilfs_ioctl_delete_checkpoints(struct the_nilfs *nilfs, |
370 | struct nilfs_argv *argv, void *buf) | |
7942b919 | 371 | { |
4f6b8288 | 372 | size_t nmembs = argv->v_nmembs; |
7942b919 KS |
373 | struct inode *cpfile = nilfs->ns_cpfile; |
374 | struct nilfs_period *periods = buf; | |
375 | int ret, i; | |
376 | ||
377 | for (i = 0; i < nmembs; i++) { | |
378 | ret = nilfs_cpfile_delete_checkpoints( | |
379 | cpfile, periods[i].p_start, periods[i].p_end); | |
380 | if (ret < 0) | |
381 | return ret; | |
382 | } | |
383 | return nmembs; | |
384 | } | |
385 | ||
4f6b8288 RK |
386 | static int nilfs_ioctl_free_vblocknrs(struct the_nilfs *nilfs, |
387 | struct nilfs_argv *argv, void *buf) | |
7942b919 | 388 | { |
4f6b8288 RK |
389 | size_t nmembs = argv->v_nmembs; |
390 | int ret; | |
7942b919 | 391 | |
4f6b8288 | 392 | ret = nilfs_dat_freev(nilfs_dat_inode(nilfs), buf, nmembs); |
7942b919 KS |
393 | |
394 | return (ret < 0) ? ret : nmembs; | |
395 | } | |
396 | ||
4f6b8288 RK |
397 | static int nilfs_ioctl_mark_blocks_dirty(struct the_nilfs *nilfs, |
398 | struct nilfs_argv *argv, void *buf) | |
7942b919 | 399 | { |
4f6b8288 | 400 | size_t nmembs = argv->v_nmembs; |
7942b919 KS |
401 | struct inode *dat = nilfs_dat_inode(nilfs); |
402 | struct nilfs_bmap *bmap = NILFS_I(dat)->i_bmap; | |
403 | struct nilfs_bdesc *bdescs = buf; | |
404 | int ret, i; | |
405 | ||
406 | for (i = 0; i < nmembs; i++) { | |
407 | /* XXX: use macro or inline func to check liveness */ | |
408 | ret = nilfs_bmap_lookup_at_level(bmap, | |
409 | bdescs[i].bd_offset, | |
410 | bdescs[i].bd_level + 1, | |
411 | &bdescs[i].bd_blocknr); | |
412 | if (ret < 0) { | |
413 | if (ret != -ENOENT) | |
414 | return ret; | |
415 | bdescs[i].bd_blocknr = 0; | |
416 | } | |
417 | if (bdescs[i].bd_blocknr != bdescs[i].bd_oblocknr) | |
418 | /* skip dead block */ | |
419 | continue; | |
420 | if (bdescs[i].bd_level == 0) { | |
421 | ret = nilfs_mdt_mark_block_dirty(dat, | |
422 | bdescs[i].bd_offset); | |
423 | if (ret < 0) { | |
1f5abe7e | 424 | WARN_ON(ret == -ENOENT); |
7942b919 KS |
425 | return ret; |
426 | } | |
427 | } else { | |
428 | ret = nilfs_bmap_mark(bmap, bdescs[i].bd_offset, | |
429 | bdescs[i].bd_level); | |
430 | if (ret < 0) { | |
1f5abe7e | 431 | WARN_ON(ret == -ENOENT); |
7942b919 KS |
432 | return ret; |
433 | } | |
434 | } | |
435 | } | |
436 | return nmembs; | |
437 | } | |
438 | ||
7942b919 | 439 | int nilfs_ioctl_prepare_clean_segments(struct the_nilfs *nilfs, |
4f6b8288 | 440 | struct nilfs_argv *argv, void **kbufs) |
7942b919 | 441 | { |
1f5abe7e | 442 | const char *msg; |
4f6b8288 | 443 | int ret; |
7942b919 | 444 | |
4f6b8288 | 445 | ret = nilfs_ioctl_move_blocks(nilfs, &argv[0], kbufs[0]); |
1f5abe7e RK |
446 | if (ret < 0) { |
447 | msg = "cannot read source blocks"; | |
448 | goto failed; | |
449 | } | |
4f6b8288 RK |
450 | |
451 | ret = nilfs_ioctl_delete_checkpoints(nilfs, &argv[1], kbufs[1]); | |
1f5abe7e RK |
452 | if (ret < 0) { |
453 | /* | |
454 | * can safely abort because checkpoints can be removed | |
455 | * independently. | |
456 | */ | |
457 | msg = "cannot delete checkpoints"; | |
458 | goto failed; | |
459 | } | |
4f6b8288 | 460 | ret = nilfs_ioctl_free_vblocknrs(nilfs, &argv[2], kbufs[2]); |
1f5abe7e RK |
461 | if (ret < 0) { |
462 | /* | |
463 | * can safely abort because DAT file is updated atomically | |
464 | * using a copy-on-write technique. | |
465 | */ | |
466 | msg = "cannot delete virtual blocks from DAT file"; | |
467 | goto failed; | |
468 | } | |
4f6b8288 | 469 | ret = nilfs_ioctl_mark_blocks_dirty(nilfs, &argv[3], kbufs[3]); |
1f5abe7e RK |
470 | if (ret < 0) { |
471 | /* | |
472 | * can safely abort because the operation is nondestructive. | |
473 | */ | |
474 | msg = "cannot mark copying blocks dirty"; | |
475 | goto failed; | |
476 | } | |
7942b919 KS |
477 | return 0; |
478 | ||
1f5abe7e | 479 | failed: |
7942b919 | 480 | nilfs_remove_all_gcinode(nilfs); |
1f5abe7e RK |
481 | printk(KERN_ERR "NILFS: GC failed during preparation: %s: err=%d\n", |
482 | msg, ret); | |
7942b919 KS |
483 | return ret; |
484 | } | |
485 | ||
486 | static int nilfs_ioctl_clean_segments(struct inode *inode, struct file *filp, | |
487 | unsigned int cmd, void __user *argp) | |
488 | { | |
4f6b8288 RK |
489 | struct nilfs_argv argv[5]; |
490 | const static size_t argsz[5] = { | |
491 | sizeof(struct nilfs_vdesc), | |
492 | sizeof(struct nilfs_period), | |
493 | sizeof(__u64), | |
494 | sizeof(struct nilfs_bdesc), | |
495 | sizeof(__u64), | |
496 | }; | |
497 | void __user *base; | |
498 | void *kbufs[5]; | |
499 | struct the_nilfs *nilfs; | |
500 | size_t len, nsegs; | |
501 | int n, ret; | |
502 | ||
7942b919 KS |
503 | if (!capable(CAP_SYS_ADMIN)) |
504 | return -EPERM; | |
4f6b8288 RK |
505 | |
506 | if (copy_from_user(argv, argp, sizeof(argv))) | |
507 | return -EFAULT; | |
508 | ||
509 | nsegs = argv[4].v_nmembs; | |
510 | if (argv[4].v_size != argsz[4]) | |
511 | return -EINVAL; | |
512 | /* | |
513 | * argv[4] points to segment numbers this ioctl cleans. We | |
514 | * use kmalloc() for its buffer because memory used for the | |
515 | * segment numbers is enough small. | |
516 | */ | |
517 | kbufs[4] = memdup_user((void __user *)(unsigned long)argv[4].v_base, | |
518 | nsegs * sizeof(__u64)); | |
519 | if (IS_ERR(kbufs[4])) | |
520 | return PTR_ERR(kbufs[4]); | |
521 | ||
522 | nilfs = NILFS_SB(inode->i_sb)->s_nilfs; | |
523 | ||
524 | for (n = 0; n < 4; n++) { | |
525 | ret = -EINVAL; | |
526 | if (argv[n].v_size != argsz[n]) | |
527 | goto out_free; | |
528 | ||
529 | if (argv[n].v_nmembs > nsegs * nilfs->ns_blocks_per_segment) | |
530 | goto out_free; | |
531 | ||
532 | len = argv[n].v_size * argv[n].v_nmembs; | |
533 | base = (void __user *)(unsigned long)argv[n].v_base; | |
534 | if (len == 0) { | |
535 | kbufs[n] = NULL; | |
536 | continue; | |
537 | } | |
538 | ||
539 | kbufs[n] = vmalloc(len); | |
540 | if (!kbufs[n]) { | |
541 | ret = -ENOMEM; | |
542 | goto out_free; | |
543 | } | |
544 | if (copy_from_user(kbufs[n], base, len)) { | |
545 | ret = -EFAULT; | |
546 | vfree(kbufs[n]); | |
547 | goto out_free; | |
548 | } | |
549 | } | |
550 | ||
551 | ret = nilfs_clean_segments(inode->i_sb, argv, kbufs); | |
552 | ||
553 | out_free: | |
d5046853 | 554 | while (--n >= 0) |
4f6b8288 RK |
555 | vfree(kbufs[n]); |
556 | kfree(kbufs[4]); | |
557 | return ret; | |
7942b919 KS |
558 | } |
559 | ||
560 | static int nilfs_ioctl_sync(struct inode *inode, struct file *filp, | |
561 | unsigned int cmd, void __user *argp) | |
562 | { | |
563 | __u64 cno; | |
564 | int ret; | |
565 | ||
566 | ret = nilfs_construct_segment(inode->i_sb); | |
567 | if (ret < 0) | |
568 | return ret; | |
569 | ||
570 | if (argp != NULL) { | |
571 | cno = NILFS_SB(inode->i_sb)->s_nilfs->ns_cno - 1; | |
572 | if (copy_to_user(argp, &cno, sizeof(cno))) | |
573 | return -EFAULT; | |
574 | } | |
575 | return 0; | |
576 | } | |
577 | ||
47eb6b9c RK |
578 | static int nilfs_ioctl_get_info(struct inode *inode, struct file *filp, |
579 | unsigned int cmd, void __user *argp, | |
83aca8f4 | 580 | size_t membsz, |
47eb6b9c RK |
581 | ssize_t (*dofunc)(struct the_nilfs *, |
582 | __u64 *, int, | |
583 | void *, size_t, size_t)) | |
584 | ||
585 | { | |
586 | struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs; | |
587 | struct nilfs_argv argv; | |
588 | int ret; | |
589 | ||
590 | if (copy_from_user(&argv, argp, sizeof(argv))) | |
591 | return -EFAULT; | |
592 | ||
003ff182 | 593 | if (argv.v_size < membsz) |
83aca8f4 RK |
594 | return -EINVAL; |
595 | ||
47eb6b9c RK |
596 | ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), dofunc); |
597 | if (ret < 0) | |
598 | return ret; | |
599 | ||
600 | if (copy_to_user(argp, &argv, sizeof(argv))) | |
601 | ret = -EFAULT; | |
602 | return ret; | |
603 | } | |
604 | ||
7a946193 | 605 | long nilfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
7942b919 | 606 | { |
7a946193 | 607 | struct inode *inode = filp->f_dentry->d_inode; |
7942b919 KS |
608 | void __user *argp = (void * __user *)arg; |
609 | ||
610 | switch (cmd) { | |
611 | case NILFS_IOCTL_CHANGE_CPMODE: | |
612 | return nilfs_ioctl_change_cpmode(inode, filp, cmd, argp); | |
613 | case NILFS_IOCTL_DELETE_CHECKPOINT: | |
614 | return nilfs_ioctl_delete_checkpoint(inode, filp, cmd, argp); | |
615 | case NILFS_IOCTL_GET_CPINFO: | |
47eb6b9c | 616 | return nilfs_ioctl_get_info(inode, filp, cmd, argp, |
83aca8f4 | 617 | sizeof(struct nilfs_cpinfo), |
47eb6b9c | 618 | nilfs_ioctl_do_get_cpinfo); |
7942b919 KS |
619 | case NILFS_IOCTL_GET_CPSTAT: |
620 | return nilfs_ioctl_get_cpstat(inode, filp, cmd, argp); | |
621 | case NILFS_IOCTL_GET_SUINFO: | |
47eb6b9c | 622 | return nilfs_ioctl_get_info(inode, filp, cmd, argp, |
83aca8f4 | 623 | sizeof(struct nilfs_suinfo), |
47eb6b9c | 624 | nilfs_ioctl_do_get_suinfo); |
7942b919 KS |
625 | case NILFS_IOCTL_GET_SUSTAT: |
626 | return nilfs_ioctl_get_sustat(inode, filp, cmd, argp); | |
627 | case NILFS_IOCTL_GET_VINFO: | |
47eb6b9c | 628 | return nilfs_ioctl_get_info(inode, filp, cmd, argp, |
83aca8f4 | 629 | sizeof(struct nilfs_vinfo), |
47eb6b9c | 630 | nilfs_ioctl_do_get_vinfo); |
7942b919 KS |
631 | case NILFS_IOCTL_GET_BDESCS: |
632 | return nilfs_ioctl_get_bdescs(inode, filp, cmd, argp); | |
633 | case NILFS_IOCTL_CLEAN_SEGMENTS: | |
634 | return nilfs_ioctl_clean_segments(inode, filp, cmd, argp); | |
7942b919 KS |
635 | case NILFS_IOCTL_SYNC: |
636 | return nilfs_ioctl_sync(inode, filp, cmd, argp); | |
637 | default: | |
638 | return -ENOTTY; | |
639 | } | |
640 | } |