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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> | |
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> |
7512487e | 29 | #include <linux/mount.h> /* mnt_want_write(), mnt_drop_write() */ |
7942b919 KS |
30 | #include <linux/nilfs2_fs.h> |
31 | #include "nilfs.h" | |
32 | #include "segment.h" | |
33 | #include "bmap.h" | |
34 | #include "cpfile.h" | |
35 | #include "sufile.h" | |
36 | #include "dat.h" | |
37 | ||
38 | ||
7942b919 KS |
39 | static int nilfs_ioctl_wrap_copy(struct the_nilfs *nilfs, |
40 | struct nilfs_argv *argv, int dir, | |
41 | ssize_t (*dofunc)(struct the_nilfs *, | |
b028fcfc | 42 | __u64 *, int, |
7942b919 KS |
43 | void *, size_t, size_t)) |
44 | { | |
45 | void *buf; | |
dc498d09 | 46 | void __user *base = (void __user *)(unsigned long)argv->v_base; |
3358b4aa | 47 | size_t maxmembs, total, n; |
7942b919 KS |
48 | ssize_t nr; |
49 | int ret, i; | |
b028fcfc | 50 | __u64 pos, ppos; |
7942b919 KS |
51 | |
52 | if (argv->v_nmembs == 0) | |
53 | return 0; | |
54 | ||
3358b4aa RK |
55 | if (argv->v_size > PAGE_SIZE) |
56 | return -EINVAL; | |
57 | ||
58 | buf = (void *)__get_free_pages(GFP_NOFS, 0); | |
59 | if (unlikely(!buf)) | |
7942b919 | 60 | return -ENOMEM; |
3358b4aa | 61 | maxmembs = PAGE_SIZE / argv->v_size; |
7942b919 KS |
62 | |
63 | ret = 0; | |
64 | total = 0; | |
b028fcfc | 65 | pos = argv->v_index; |
7942b919 KS |
66 | for (i = 0; i < argv->v_nmembs; i += n) { |
67 | n = (argv->v_nmembs - i < maxmembs) ? | |
68 | argv->v_nmembs - i : maxmembs; | |
69 | if ((dir & _IOC_WRITE) && | |
dc498d09 RK |
70 | copy_from_user(buf, base + argv->v_size * i, |
71 | argv->v_size * n)) { | |
7942b919 KS |
72 | ret = -EFAULT; |
73 | break; | |
74 | } | |
b028fcfc | 75 | ppos = pos; |
8acfbf09 | 76 | nr = dofunc(nilfs, &pos, argv->v_flags, buf, argv->v_size, |
b028fcfc | 77 | n); |
7942b919 KS |
78 | if (nr < 0) { |
79 | ret = nr; | |
80 | break; | |
81 | } | |
82 | if ((dir & _IOC_READ) && | |
dc498d09 RK |
83 | copy_to_user(base + argv->v_size * i, buf, |
84 | argv->v_size * nr)) { | |
7942b919 KS |
85 | ret = -EFAULT; |
86 | break; | |
87 | } | |
88 | total += nr; | |
b028fcfc RK |
89 | if ((size_t)nr < n) |
90 | break; | |
91 | if (pos == ppos) | |
92 | pos += n; | |
7942b919 KS |
93 | } |
94 | argv->v_nmembs = total; | |
95 | ||
3358b4aa | 96 | free_pages((unsigned long)buf, 0); |
7942b919 KS |
97 | return ret; |
98 | } | |
99 | ||
100 | static int nilfs_ioctl_change_cpmode(struct inode *inode, struct file *filp, | |
101 | unsigned int cmd, void __user *argp) | |
102 | { | |
c1ea985c RK |
103 | struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs; |
104 | struct inode *cpfile = nilfs->ns_cpfile; | |
7942b919 KS |
105 | struct nilfs_transaction_info ti; |
106 | struct nilfs_cpmode cpmode; | |
107 | int ret; | |
108 | ||
109 | if (!capable(CAP_SYS_ADMIN)) | |
110 | return -EPERM; | |
7512487e RK |
111 | |
112 | ret = mnt_want_write(filp->f_path.mnt); | |
113 | if (ret) | |
114 | return ret; | |
115 | ||
116 | ret = -EFAULT; | |
7942b919 | 117 | if (copy_from_user(&cpmode, argp, sizeof(cpmode))) |
7512487e | 118 | goto out; |
7942b919 | 119 | |
348fe8da | 120 | down_read(&inode->i_sb->s_umount); |
7512487e | 121 | |
7942b919 KS |
122 | nilfs_transaction_begin(inode->i_sb, &ti, 0); |
123 | ret = nilfs_cpfile_change_cpmode( | |
124 | cpfile, cpmode.cm_cno, cpmode.cm_mode); | |
7512487e | 125 | if (unlikely(ret < 0)) |
47420c79 | 126 | nilfs_transaction_abort(inode->i_sb); |
7512487e RK |
127 | else |
128 | nilfs_transaction_commit(inode->i_sb); /* never fails */ | |
129 | ||
348fe8da | 130 | up_read(&inode->i_sb->s_umount); |
7512487e RK |
131 | out: |
132 | mnt_drop_write(filp->f_path.mnt); | |
7942b919 KS |
133 | return ret; |
134 | } | |
135 | ||
136 | static int | |
137 | nilfs_ioctl_delete_checkpoint(struct inode *inode, struct file *filp, | |
138 | unsigned int cmd, void __user *argp) | |
139 | { | |
140 | struct inode *cpfile = NILFS_SB(inode->i_sb)->s_nilfs->ns_cpfile; | |
141 | struct nilfs_transaction_info ti; | |
142 | __u64 cno; | |
143 | int ret; | |
144 | ||
145 | if (!capable(CAP_SYS_ADMIN)) | |
146 | return -EPERM; | |
7512487e RK |
147 | |
148 | ret = mnt_want_write(filp->f_path.mnt); | |
149 | if (ret) | |
150 | return ret; | |
151 | ||
152 | ret = -EFAULT; | |
7942b919 | 153 | if (copy_from_user(&cno, argp, sizeof(cno))) |
7512487e | 154 | goto out; |
7942b919 KS |
155 | |
156 | nilfs_transaction_begin(inode->i_sb, &ti, 0); | |
157 | ret = nilfs_cpfile_delete_checkpoint(cpfile, cno); | |
7512487e | 158 | if (unlikely(ret < 0)) |
47420c79 | 159 | nilfs_transaction_abort(inode->i_sb); |
7512487e RK |
160 | else |
161 | nilfs_transaction_commit(inode->i_sb); /* never fails */ | |
162 | out: | |
163 | mnt_drop_write(filp->f_path.mnt); | |
7942b919 KS |
164 | return ret; |
165 | } | |
166 | ||
167 | static ssize_t | |
b028fcfc | 168 | nilfs_ioctl_do_get_cpinfo(struct the_nilfs *nilfs, __u64 *posp, int flags, |
7942b919 KS |
169 | void *buf, size_t size, size_t nmembs) |
170 | { | |
7942b919 KS |
171 | int ret; |
172 | ||
47420c79 | 173 | down_read(&nilfs->ns_segctor_sem); |
47eb6b9c | 174 | ret = nilfs_cpfile_get_cpinfo(nilfs->ns_cpfile, posp, flags, buf, |
003ff182 | 175 | size, nmembs); |
47420c79 | 176 | up_read(&nilfs->ns_segctor_sem); |
7942b919 KS |
177 | return ret; |
178 | } | |
179 | ||
180 | static int nilfs_ioctl_get_cpstat(struct inode *inode, struct file *filp, | |
181 | unsigned int cmd, void __user *argp) | |
182 | { | |
47420c79 | 183 | struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs; |
7942b919 | 184 | struct nilfs_cpstat cpstat; |
7942b919 KS |
185 | int ret; |
186 | ||
47420c79 RK |
187 | down_read(&nilfs->ns_segctor_sem); |
188 | ret = nilfs_cpfile_get_stat(nilfs->ns_cpfile, &cpstat); | |
189 | up_read(&nilfs->ns_segctor_sem); | |
7942b919 KS |
190 | if (ret < 0) |
191 | return ret; | |
192 | ||
193 | if (copy_to_user(argp, &cpstat, sizeof(cpstat))) | |
194 | ret = -EFAULT; | |
195 | return ret; | |
196 | } | |
197 | ||
198 | static ssize_t | |
b028fcfc | 199 | nilfs_ioctl_do_get_suinfo(struct the_nilfs *nilfs, __u64 *posp, int flags, |
7942b919 KS |
200 | void *buf, size_t size, size_t nmembs) |
201 | { | |
7942b919 KS |
202 | int ret; |
203 | ||
47420c79 | 204 | down_read(&nilfs->ns_segctor_sem); |
003ff182 RK |
205 | ret = nilfs_sufile_get_suinfo(nilfs->ns_sufile, *posp, buf, size, |
206 | nmembs); | |
47420c79 | 207 | up_read(&nilfs->ns_segctor_sem); |
7942b919 KS |
208 | return ret; |
209 | } | |
210 | ||
211 | static int nilfs_ioctl_get_sustat(struct inode *inode, struct file *filp, | |
212 | unsigned int cmd, void __user *argp) | |
213 | { | |
47420c79 | 214 | struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs; |
7942b919 | 215 | struct nilfs_sustat sustat; |
7942b919 KS |
216 | int ret; |
217 | ||
47420c79 RK |
218 | down_read(&nilfs->ns_segctor_sem); |
219 | ret = nilfs_sufile_get_stat(nilfs->ns_sufile, &sustat); | |
220 | up_read(&nilfs->ns_segctor_sem); | |
7942b919 KS |
221 | if (ret < 0) |
222 | return ret; | |
223 | ||
224 | if (copy_to_user(argp, &sustat, sizeof(sustat))) | |
225 | ret = -EFAULT; | |
226 | return ret; | |
227 | } | |
228 | ||
229 | static ssize_t | |
b028fcfc | 230 | nilfs_ioctl_do_get_vinfo(struct the_nilfs *nilfs, __u64 *posp, int flags, |
7942b919 KS |
231 | void *buf, size_t size, size_t nmembs) |
232 | { | |
7942b919 KS |
233 | int ret; |
234 | ||
47420c79 | 235 | down_read(&nilfs->ns_segctor_sem); |
365e215c | 236 | ret = nilfs_dat_get_vinfo(nilfs->ns_dat, buf, size, nmembs); |
47420c79 | 237 | up_read(&nilfs->ns_segctor_sem); |
7942b919 KS |
238 | return ret; |
239 | } | |
240 | ||
241 | static ssize_t | |
b028fcfc | 242 | nilfs_ioctl_do_get_bdescs(struct the_nilfs *nilfs, __u64 *posp, int flags, |
7942b919 KS |
243 | void *buf, size_t size, size_t nmembs) |
244 | { | |
365e215c | 245 | struct nilfs_bmap *bmap = NILFS_I(nilfs->ns_dat)->i_bmap; |
7942b919 KS |
246 | struct nilfs_bdesc *bdescs = buf; |
247 | int ret, i; | |
248 | ||
47eb6b9c | 249 | down_read(&nilfs->ns_segctor_sem); |
7942b919 KS |
250 | for (i = 0; i < nmembs; i++) { |
251 | ret = nilfs_bmap_lookup_at_level(bmap, | |
252 | bdescs[i].bd_offset, | |
253 | bdescs[i].bd_level + 1, | |
254 | &bdescs[i].bd_blocknr); | |
255 | if (ret < 0) { | |
47eb6b9c RK |
256 | if (ret != -ENOENT) { |
257 | up_read(&nilfs->ns_segctor_sem); | |
7942b919 | 258 | return ret; |
47eb6b9c | 259 | } |
7942b919 KS |
260 | bdescs[i].bd_blocknr = 0; |
261 | } | |
262 | } | |
47eb6b9c | 263 | up_read(&nilfs->ns_segctor_sem); |
7942b919 KS |
264 | return nmembs; |
265 | } | |
266 | ||
267 | static int nilfs_ioctl_get_bdescs(struct inode *inode, struct file *filp, | |
268 | unsigned int cmd, void __user *argp) | |
269 | { | |
270 | struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs; | |
271 | struct nilfs_argv argv; | |
7942b919 KS |
272 | int ret; |
273 | ||
274 | if (copy_from_user(&argv, argp, sizeof(argv))) | |
275 | return -EFAULT; | |
276 | ||
83aca8f4 RK |
277 | if (argv.v_size != sizeof(struct nilfs_bdesc)) |
278 | return -EINVAL; | |
279 | ||
7942b919 KS |
280 | ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), |
281 | nilfs_ioctl_do_get_bdescs); | |
47420c79 RK |
282 | if (ret < 0) |
283 | return ret; | |
7942b919 KS |
284 | |
285 | if (copy_to_user(argp, &argv, sizeof(argv))) | |
286 | ret = -EFAULT; | |
287 | return ret; | |
288 | } | |
289 | ||
290 | static int nilfs_ioctl_move_inode_block(struct inode *inode, | |
291 | struct nilfs_vdesc *vdesc, | |
292 | struct list_head *buffers) | |
293 | { | |
294 | struct buffer_head *bh; | |
295 | int ret; | |
296 | ||
297 | if (vdesc->vd_flags == 0) | |
298 | ret = nilfs_gccache_submit_read_data( | |
299 | inode, vdesc->vd_offset, vdesc->vd_blocknr, | |
300 | vdesc->vd_vblocknr, &bh); | |
301 | else | |
302 | ret = nilfs_gccache_submit_read_node( | |
303 | inode, vdesc->vd_blocknr, vdesc->vd_vblocknr, &bh); | |
304 | ||
305 | if (unlikely(ret < 0)) { | |
306 | if (ret == -ENOENT) | |
307 | printk(KERN_CRIT | |
308 | "%s: invalid virtual block address (%s): " | |
309 | "ino=%llu, cno=%llu, offset=%llu, " | |
310 | "blocknr=%llu, vblocknr=%llu\n", | |
311 | __func__, vdesc->vd_flags ? "node" : "data", | |
312 | (unsigned long long)vdesc->vd_ino, | |
313 | (unsigned long long)vdesc->vd_cno, | |
314 | (unsigned long long)vdesc->vd_offset, | |
315 | (unsigned long long)vdesc->vd_blocknr, | |
316 | (unsigned long long)vdesc->vd_vblocknr); | |
317 | return ret; | |
318 | } | |
5399dd1f RK |
319 | if (unlikely(!list_empty(&bh->b_assoc_buffers))) { |
320 | printk(KERN_CRIT "%s: conflicting %s buffer: ino=%llu, " | |
321 | "cno=%llu, offset=%llu, blocknr=%llu, vblocknr=%llu\n", | |
322 | __func__, vdesc->vd_flags ? "node" : "data", | |
323 | (unsigned long long)vdesc->vd_ino, | |
324 | (unsigned long long)vdesc->vd_cno, | |
325 | (unsigned long long)vdesc->vd_offset, | |
326 | (unsigned long long)vdesc->vd_blocknr, | |
327 | (unsigned long long)vdesc->vd_vblocknr); | |
328 | brelse(bh); | |
329 | return -EEXIST; | |
330 | } | |
7942b919 KS |
331 | list_add_tail(&bh->b_assoc_buffers, buffers); |
332 | return 0; | |
333 | } | |
334 | ||
263d90ce | 335 | static int nilfs_ioctl_move_blocks(struct super_block *sb, |
4f6b8288 | 336 | struct nilfs_argv *argv, void *buf) |
7942b919 | 337 | { |
4f6b8288 | 338 | size_t nmembs = argv->v_nmembs; |
947b10ae | 339 | struct the_nilfs *nilfs = NILFS_SB(sb)->s_nilfs; |
7942b919 KS |
340 | struct inode *inode; |
341 | struct nilfs_vdesc *vdesc; | |
342 | struct buffer_head *bh, *n; | |
343 | LIST_HEAD(buffers); | |
344 | ino_t ino; | |
345 | __u64 cno; | |
346 | int i, ret; | |
347 | ||
348 | for (i = 0, vdesc = buf; i < nmembs; ) { | |
349 | ino = vdesc->vd_ino; | |
350 | cno = vdesc->vd_cno; | |
263d90ce | 351 | inode = nilfs_iget_for_gc(sb, ino, cno); |
103cfcf5 DC |
352 | if (IS_ERR(inode)) { |
353 | ret = PTR_ERR(inode); | |
7942b919 KS |
354 | goto failed; |
355 | } | |
947b10ae RK |
356 | if (list_empty(&NILFS_I(inode)->i_dirty)) { |
357 | /* | |
358 | * Add the inode to GC inode list. Garbage Collection | |
359 | * is serialized and no two processes manipulate the | |
360 | * list simultaneously. | |
361 | */ | |
362 | igrab(inode); | |
363 | list_add(&NILFS_I(inode)->i_dirty, | |
364 | &nilfs->ns_gc_inodes); | |
365 | } | |
366 | ||
7942b919 KS |
367 | do { |
368 | ret = nilfs_ioctl_move_inode_block(inode, vdesc, | |
369 | &buffers); | |
263d90ce RK |
370 | if (unlikely(ret < 0)) { |
371 | iput(inode); | |
7942b919 | 372 | goto failed; |
263d90ce | 373 | } |
7942b919 KS |
374 | vdesc++; |
375 | } while (++i < nmembs && | |
376 | vdesc->vd_ino == ino && vdesc->vd_cno == cno); | |
263d90ce RK |
377 | |
378 | iput(inode); /* The inode still remains in GC inode list */ | |
7942b919 KS |
379 | } |
380 | ||
381 | list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) { | |
382 | ret = nilfs_gccache_wait_and_mark_dirty(bh); | |
383 | if (unlikely(ret < 0)) { | |
5399dd1f | 384 | WARN_ON(ret == -EEXIST); |
7942b919 KS |
385 | goto failed; |
386 | } | |
387 | list_del_init(&bh->b_assoc_buffers); | |
7942b919 KS |
388 | brelse(bh); |
389 | } | |
390 | return nmembs; | |
391 | ||
392 | failed: | |
393 | list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) { | |
394 | list_del_init(&bh->b_assoc_buffers); | |
7942b919 KS |
395 | brelse(bh); |
396 | } | |
397 | return ret; | |
398 | } | |
399 | ||
4f6b8288 RK |
400 | static int nilfs_ioctl_delete_checkpoints(struct the_nilfs *nilfs, |
401 | struct nilfs_argv *argv, void *buf) | |
7942b919 | 402 | { |
4f6b8288 | 403 | size_t nmembs = argv->v_nmembs; |
7942b919 KS |
404 | struct inode *cpfile = nilfs->ns_cpfile; |
405 | struct nilfs_period *periods = buf; | |
406 | int ret, i; | |
407 | ||
408 | for (i = 0; i < nmembs; i++) { | |
409 | ret = nilfs_cpfile_delete_checkpoints( | |
410 | cpfile, periods[i].p_start, periods[i].p_end); | |
411 | if (ret < 0) | |
412 | return ret; | |
413 | } | |
414 | return nmembs; | |
415 | } | |
416 | ||
4f6b8288 RK |
417 | static int nilfs_ioctl_free_vblocknrs(struct the_nilfs *nilfs, |
418 | struct nilfs_argv *argv, void *buf) | |
7942b919 | 419 | { |
4f6b8288 RK |
420 | size_t nmembs = argv->v_nmembs; |
421 | int ret; | |
7942b919 | 422 | |
365e215c | 423 | ret = nilfs_dat_freev(nilfs->ns_dat, buf, nmembs); |
7942b919 KS |
424 | |
425 | return (ret < 0) ? ret : nmembs; | |
426 | } | |
427 | ||
4f6b8288 RK |
428 | static int nilfs_ioctl_mark_blocks_dirty(struct the_nilfs *nilfs, |
429 | struct nilfs_argv *argv, void *buf) | |
7942b919 | 430 | { |
4f6b8288 | 431 | size_t nmembs = argv->v_nmembs; |
365e215c | 432 | struct nilfs_bmap *bmap = NILFS_I(nilfs->ns_dat)->i_bmap; |
7942b919 KS |
433 | struct nilfs_bdesc *bdescs = buf; |
434 | int ret, i; | |
435 | ||
436 | for (i = 0; i < nmembs; i++) { | |
437 | /* XXX: use macro or inline func to check liveness */ | |
438 | ret = nilfs_bmap_lookup_at_level(bmap, | |
439 | bdescs[i].bd_offset, | |
440 | bdescs[i].bd_level + 1, | |
441 | &bdescs[i].bd_blocknr); | |
442 | if (ret < 0) { | |
443 | if (ret != -ENOENT) | |
444 | return ret; | |
445 | bdescs[i].bd_blocknr = 0; | |
446 | } | |
447 | if (bdescs[i].bd_blocknr != bdescs[i].bd_oblocknr) | |
448 | /* skip dead block */ | |
449 | continue; | |
450 | if (bdescs[i].bd_level == 0) { | |
365e215c | 451 | ret = nilfs_mdt_mark_block_dirty(nilfs->ns_dat, |
7942b919 KS |
452 | bdescs[i].bd_offset); |
453 | if (ret < 0) { | |
1f5abe7e | 454 | WARN_ON(ret == -ENOENT); |
7942b919 KS |
455 | return ret; |
456 | } | |
457 | } else { | |
458 | ret = nilfs_bmap_mark(bmap, bdescs[i].bd_offset, | |
459 | bdescs[i].bd_level); | |
460 | if (ret < 0) { | |
1f5abe7e | 461 | WARN_ON(ret == -ENOENT); |
7942b919 KS |
462 | return ret; |
463 | } | |
464 | } | |
465 | } | |
466 | return nmembs; | |
467 | } | |
468 | ||
7942b919 | 469 | int nilfs_ioctl_prepare_clean_segments(struct the_nilfs *nilfs, |
4f6b8288 | 470 | struct nilfs_argv *argv, void **kbufs) |
7942b919 | 471 | { |
1f5abe7e | 472 | const char *msg; |
4f6b8288 | 473 | int ret; |
7942b919 | 474 | |
4f6b8288 | 475 | ret = nilfs_ioctl_delete_checkpoints(nilfs, &argv[1], kbufs[1]); |
1f5abe7e RK |
476 | if (ret < 0) { |
477 | /* | |
478 | * can safely abort because checkpoints can be removed | |
479 | * independently. | |
480 | */ | |
481 | msg = "cannot delete checkpoints"; | |
482 | goto failed; | |
483 | } | |
4f6b8288 | 484 | ret = nilfs_ioctl_free_vblocknrs(nilfs, &argv[2], kbufs[2]); |
1f5abe7e RK |
485 | if (ret < 0) { |
486 | /* | |
487 | * can safely abort because DAT file is updated atomically | |
488 | * using a copy-on-write technique. | |
489 | */ | |
490 | msg = "cannot delete virtual blocks from DAT file"; | |
491 | goto failed; | |
492 | } | |
4f6b8288 | 493 | ret = nilfs_ioctl_mark_blocks_dirty(nilfs, &argv[3], kbufs[3]); |
1f5abe7e RK |
494 | if (ret < 0) { |
495 | /* | |
496 | * can safely abort because the operation is nondestructive. | |
497 | */ | |
498 | msg = "cannot mark copying blocks dirty"; | |
499 | goto failed; | |
500 | } | |
7942b919 KS |
501 | return 0; |
502 | ||
1f5abe7e | 503 | failed: |
1f5abe7e RK |
504 | printk(KERN_ERR "NILFS: GC failed during preparation: %s: err=%d\n", |
505 | msg, ret); | |
7942b919 KS |
506 | return ret; |
507 | } | |
508 | ||
509 | static int nilfs_ioctl_clean_segments(struct inode *inode, struct file *filp, | |
510 | unsigned int cmd, void __user *argp) | |
511 | { | |
4f6b8288 | 512 | struct nilfs_argv argv[5]; |
33e189bd | 513 | static const size_t argsz[5] = { |
4f6b8288 RK |
514 | sizeof(struct nilfs_vdesc), |
515 | sizeof(struct nilfs_period), | |
516 | sizeof(__u64), | |
517 | sizeof(struct nilfs_bdesc), | |
518 | sizeof(__u64), | |
519 | }; | |
520 | void __user *base; | |
521 | void *kbufs[5]; | |
522 | struct the_nilfs *nilfs; | |
523 | size_t len, nsegs; | |
524 | int n, ret; | |
525 | ||
7942b919 KS |
526 | if (!capable(CAP_SYS_ADMIN)) |
527 | return -EPERM; | |
4f6b8288 | 528 | |
7512487e RK |
529 | ret = mnt_want_write(filp->f_path.mnt); |
530 | if (ret) | |
531 | return ret; | |
532 | ||
533 | ret = -EFAULT; | |
4f6b8288 | 534 | if (copy_from_user(argv, argp, sizeof(argv))) |
7512487e | 535 | goto out; |
4f6b8288 | 536 | |
7512487e | 537 | ret = -EINVAL; |
4f6b8288 RK |
538 | nsegs = argv[4].v_nmembs; |
539 | if (argv[4].v_size != argsz[4]) | |
7512487e RK |
540 | goto out; |
541 | ||
4f6b8288 RK |
542 | /* |
543 | * argv[4] points to segment numbers this ioctl cleans. We | |
544 | * use kmalloc() for its buffer because memory used for the | |
545 | * segment numbers is enough small. | |
546 | */ | |
547 | kbufs[4] = memdup_user((void __user *)(unsigned long)argv[4].v_base, | |
548 | nsegs * sizeof(__u64)); | |
7512487e RK |
549 | if (IS_ERR(kbufs[4])) { |
550 | ret = PTR_ERR(kbufs[4]); | |
551 | goto out; | |
552 | } | |
4f6b8288 RK |
553 | nilfs = NILFS_SB(inode->i_sb)->s_nilfs; |
554 | ||
555 | for (n = 0; n < 4; n++) { | |
556 | ret = -EINVAL; | |
557 | if (argv[n].v_size != argsz[n]) | |
558 | goto out_free; | |
559 | ||
560 | if (argv[n].v_nmembs > nsegs * nilfs->ns_blocks_per_segment) | |
561 | goto out_free; | |
562 | ||
563 | len = argv[n].v_size * argv[n].v_nmembs; | |
564 | base = (void __user *)(unsigned long)argv[n].v_base; | |
565 | if (len == 0) { | |
566 | kbufs[n] = NULL; | |
567 | continue; | |
568 | } | |
569 | ||
570 | kbufs[n] = vmalloc(len); | |
571 | if (!kbufs[n]) { | |
572 | ret = -ENOMEM; | |
573 | goto out_free; | |
574 | } | |
575 | if (copy_from_user(kbufs[n], base, len)) { | |
576 | ret = -EFAULT; | |
577 | vfree(kbufs[n]); | |
578 | goto out_free; | |
579 | } | |
580 | } | |
581 | ||
1cf58fa8 | 582 | /* |
263d90ce | 583 | * nilfs_ioctl_move_blocks() will call nilfs_iget_for_gc(), |
1cf58fa8 JS |
584 | * which will operates an inode list without blocking. |
585 | * To protect the list from concurrent operations, | |
586 | * nilfs_ioctl_move_blocks should be atomic operation. | |
587 | */ | |
588 | if (test_and_set_bit(THE_NILFS_GC_RUNNING, &nilfs->ns_flags)) { | |
589 | ret = -EBUSY; | |
590 | goto out_free; | |
591 | } | |
592 | ||
5beb6e0b RK |
593 | vfs_check_frozen(inode->i_sb, SB_FREEZE_WRITE); |
594 | ||
263d90ce | 595 | ret = nilfs_ioctl_move_blocks(inode->i_sb, &argv[0], kbufs[0]); |
1cf58fa8 JS |
596 | if (ret < 0) |
597 | printk(KERN_ERR "NILFS: GC failed during preparation: " | |
598 | "cannot read source blocks: err=%d\n", ret); | |
599 | else | |
600 | ret = nilfs_clean_segments(inode->i_sb, argv, kbufs); | |
601 | ||
263d90ce | 602 | nilfs_remove_all_gcinodes(nilfs); |
1cf58fa8 | 603 | clear_nilfs_gc_running(nilfs); |
4f6b8288 | 604 | |
7512487e | 605 | out_free: |
d5046853 | 606 | while (--n >= 0) |
4f6b8288 RK |
607 | vfree(kbufs[n]); |
608 | kfree(kbufs[4]); | |
7512487e RK |
609 | out: |
610 | mnt_drop_write(filp->f_path.mnt); | |
4f6b8288 | 611 | return ret; |
7942b919 KS |
612 | } |
613 | ||
614 | static int nilfs_ioctl_sync(struct inode *inode, struct file *filp, | |
615 | unsigned int cmd, void __user *argp) | |
616 | { | |
617 | __u64 cno; | |
618 | int ret; | |
0d561f12 | 619 | struct the_nilfs *nilfs; |
7942b919 KS |
620 | |
621 | ret = nilfs_construct_segment(inode->i_sb); | |
622 | if (ret < 0) | |
623 | return ret; | |
624 | ||
625 | if (argp != NULL) { | |
0d561f12 JS |
626 | nilfs = NILFS_SB(inode->i_sb)->s_nilfs; |
627 | down_read(&nilfs->ns_segctor_sem); | |
628 | cno = nilfs->ns_cno - 1; | |
629 | up_read(&nilfs->ns_segctor_sem); | |
7942b919 KS |
630 | if (copy_to_user(argp, &cno, sizeof(cno))) |
631 | return -EFAULT; | |
632 | } | |
633 | return 0; | |
634 | } | |
635 | ||
47eb6b9c RK |
636 | static int nilfs_ioctl_get_info(struct inode *inode, struct file *filp, |
637 | unsigned int cmd, void __user *argp, | |
83aca8f4 | 638 | size_t membsz, |
47eb6b9c RK |
639 | ssize_t (*dofunc)(struct the_nilfs *, |
640 | __u64 *, int, | |
641 | void *, size_t, size_t)) | |
642 | ||
643 | { | |
644 | struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs; | |
645 | struct nilfs_argv argv; | |
646 | int ret; | |
647 | ||
648 | if (copy_from_user(&argv, argp, sizeof(argv))) | |
649 | return -EFAULT; | |
650 | ||
003ff182 | 651 | if (argv.v_size < membsz) |
83aca8f4 RK |
652 | return -EINVAL; |
653 | ||
47eb6b9c RK |
654 | ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), dofunc); |
655 | if (ret < 0) | |
656 | return ret; | |
657 | ||
658 | if (copy_to_user(argp, &argv, sizeof(argv))) | |
659 | ret = -EFAULT; | |
660 | return ret; | |
661 | } | |
662 | ||
7a946193 | 663 | long nilfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
7942b919 | 664 | { |
7a946193 | 665 | struct inode *inode = filp->f_dentry->d_inode; |
75323400 | 666 | void __user *argp = (void __user *)arg; |
7942b919 KS |
667 | |
668 | switch (cmd) { | |
669 | case NILFS_IOCTL_CHANGE_CPMODE: | |
670 | return nilfs_ioctl_change_cpmode(inode, filp, cmd, argp); | |
671 | case NILFS_IOCTL_DELETE_CHECKPOINT: | |
672 | return nilfs_ioctl_delete_checkpoint(inode, filp, cmd, argp); | |
673 | case NILFS_IOCTL_GET_CPINFO: | |
47eb6b9c | 674 | return nilfs_ioctl_get_info(inode, filp, cmd, argp, |
83aca8f4 | 675 | sizeof(struct nilfs_cpinfo), |
47eb6b9c | 676 | nilfs_ioctl_do_get_cpinfo); |
7942b919 KS |
677 | case NILFS_IOCTL_GET_CPSTAT: |
678 | return nilfs_ioctl_get_cpstat(inode, filp, cmd, argp); | |
679 | case NILFS_IOCTL_GET_SUINFO: | |
47eb6b9c | 680 | return nilfs_ioctl_get_info(inode, filp, cmd, argp, |
83aca8f4 | 681 | sizeof(struct nilfs_suinfo), |
47eb6b9c | 682 | nilfs_ioctl_do_get_suinfo); |
7942b919 KS |
683 | case NILFS_IOCTL_GET_SUSTAT: |
684 | return nilfs_ioctl_get_sustat(inode, filp, cmd, argp); | |
685 | case NILFS_IOCTL_GET_VINFO: | |
47eb6b9c | 686 | return nilfs_ioctl_get_info(inode, filp, cmd, argp, |
83aca8f4 | 687 | sizeof(struct nilfs_vinfo), |
47eb6b9c | 688 | nilfs_ioctl_do_get_vinfo); |
7942b919 KS |
689 | case NILFS_IOCTL_GET_BDESCS: |
690 | return nilfs_ioctl_get_bdescs(inode, filp, cmd, argp); | |
691 | case NILFS_IOCTL_CLEAN_SEGMENTS: | |
692 | return nilfs_ioctl_clean_segments(inode, filp, cmd, argp); | |
7942b919 KS |
693 | case NILFS_IOCTL_SYNC: |
694 | return nilfs_ioctl_sync(inode, filp, cmd, argp); | |
695 | default: | |
696 | return -ENOTTY; | |
697 | } | |
698 | } |