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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() */ | |
28 | #include <linux/nilfs2_fs.h> | |
29 | #include "nilfs.h" | |
30 | #include "segment.h" | |
31 | #include "bmap.h" | |
32 | #include "cpfile.h" | |
33 | #include "sufile.h" | |
34 | #include "dat.h" | |
35 | ||
36 | ||
7942b919 KS |
37 | static int nilfs_ioctl_wrap_copy(struct the_nilfs *nilfs, |
38 | struct nilfs_argv *argv, int dir, | |
39 | ssize_t (*dofunc)(struct the_nilfs *, | |
b028fcfc | 40 | __u64 *, int, |
7942b919 KS |
41 | void *, size_t, size_t)) |
42 | { | |
43 | void *buf; | |
3358b4aa | 44 | size_t maxmembs, total, n; |
7942b919 KS |
45 | ssize_t nr; |
46 | int ret, i; | |
b028fcfc | 47 | __u64 pos, ppos; |
7942b919 KS |
48 | |
49 | if (argv->v_nmembs == 0) | |
50 | return 0; | |
51 | ||
3358b4aa RK |
52 | if (argv->v_size > PAGE_SIZE) |
53 | return -EINVAL; | |
54 | ||
55 | buf = (void *)__get_free_pages(GFP_NOFS, 0); | |
56 | if (unlikely(!buf)) | |
7942b919 | 57 | return -ENOMEM; |
3358b4aa | 58 | maxmembs = PAGE_SIZE / argv->v_size; |
7942b919 KS |
59 | |
60 | ret = 0; | |
61 | total = 0; | |
b028fcfc | 62 | pos = argv->v_index; |
7942b919 KS |
63 | for (i = 0; i < argv->v_nmembs; i += n) { |
64 | n = (argv->v_nmembs - i < maxmembs) ? | |
65 | argv->v_nmembs - i : maxmembs; | |
66 | if ((dir & _IOC_WRITE) && | |
67 | copy_from_user(buf, | |
68 | (void __user *)argv->v_base + argv->v_size * i, | |
69 | argv->v_size * n)) { | |
70 | ret = -EFAULT; | |
71 | break; | |
72 | } | |
b028fcfc RK |
73 | ppos = pos; |
74 | nr = (*dofunc)(nilfs, &pos, argv->v_flags, buf, argv->v_size, | |
75 | n); | |
7942b919 KS |
76 | if (nr < 0) { |
77 | ret = nr; | |
78 | break; | |
79 | } | |
80 | if ((dir & _IOC_READ) && | |
81 | copy_to_user( | |
82 | (void __user *)argv->v_base + argv->v_size * i, | |
83 | buf, argv->v_size * nr)) { | |
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 | { | |
b028fcfc | 151 | return nilfs_cpfile_get_cpinfo(nilfs->ns_cpfile, posp, flags, buf, |
7942b919 KS |
152 | nmembs); |
153 | } | |
154 | ||
155 | static int nilfs_ioctl_get_cpinfo(struct inode *inode, struct file *filp, | |
156 | unsigned int cmd, void __user *argp) | |
157 | { | |
158 | struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs; | |
159 | struct nilfs_argv argv; | |
7942b919 KS |
160 | int ret; |
161 | ||
162 | if (copy_from_user(&argv, argp, sizeof(argv))) | |
163 | return -EFAULT; | |
164 | ||
47420c79 | 165 | down_read(&nilfs->ns_segctor_sem); |
7942b919 KS |
166 | ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), |
167 | nilfs_ioctl_do_get_cpinfo); | |
47420c79 RK |
168 | up_read(&nilfs->ns_segctor_sem); |
169 | if (ret < 0) | |
170 | return ret; | |
7942b919 KS |
171 | |
172 | if (copy_to_user(argp, &argv, sizeof(argv))) | |
173 | ret = -EFAULT; | |
174 | return ret; | |
175 | } | |
176 | ||
177 | static int nilfs_ioctl_get_cpstat(struct inode *inode, struct file *filp, | |
178 | unsigned int cmd, void __user *argp) | |
179 | { | |
47420c79 | 180 | struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs; |
7942b919 | 181 | struct nilfs_cpstat cpstat; |
7942b919 KS |
182 | int ret; |
183 | ||
47420c79 RK |
184 | down_read(&nilfs->ns_segctor_sem); |
185 | ret = nilfs_cpfile_get_stat(nilfs->ns_cpfile, &cpstat); | |
186 | up_read(&nilfs->ns_segctor_sem); | |
7942b919 KS |
187 | if (ret < 0) |
188 | return ret; | |
189 | ||
190 | if (copy_to_user(argp, &cpstat, sizeof(cpstat))) | |
191 | ret = -EFAULT; | |
192 | return ret; | |
193 | } | |
194 | ||
195 | static ssize_t | |
b028fcfc | 196 | nilfs_ioctl_do_get_suinfo(struct the_nilfs *nilfs, __u64 *posp, int flags, |
7942b919 KS |
197 | void *buf, size_t size, size_t nmembs) |
198 | { | |
b028fcfc | 199 | return nilfs_sufile_get_suinfo(nilfs->ns_sufile, *posp, buf, nmembs); |
7942b919 KS |
200 | } |
201 | ||
202 | static int nilfs_ioctl_get_suinfo(struct inode *inode, struct file *filp, | |
203 | unsigned int cmd, void __user *argp) | |
204 | { | |
205 | struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs; | |
206 | struct nilfs_argv argv; | |
7942b919 KS |
207 | int ret; |
208 | ||
209 | if (copy_from_user(&argv, argp, sizeof(argv))) | |
210 | return -EFAULT; | |
211 | ||
47420c79 | 212 | down_read(&nilfs->ns_segctor_sem); |
7942b919 KS |
213 | ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), |
214 | nilfs_ioctl_do_get_suinfo); | |
47420c79 RK |
215 | up_read(&nilfs->ns_segctor_sem); |
216 | if (ret < 0) | |
217 | return ret; | |
7942b919 KS |
218 | |
219 | if (copy_to_user(argp, &argv, sizeof(argv))) | |
220 | ret = -EFAULT; | |
221 | return ret; | |
222 | } | |
223 | ||
224 | static int nilfs_ioctl_get_sustat(struct inode *inode, struct file *filp, | |
225 | unsigned int cmd, void __user *argp) | |
226 | { | |
47420c79 | 227 | struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs; |
7942b919 | 228 | struct nilfs_sustat sustat; |
7942b919 KS |
229 | int ret; |
230 | ||
47420c79 RK |
231 | down_read(&nilfs->ns_segctor_sem); |
232 | ret = nilfs_sufile_get_stat(nilfs->ns_sufile, &sustat); | |
233 | up_read(&nilfs->ns_segctor_sem); | |
7942b919 KS |
234 | if (ret < 0) |
235 | return ret; | |
236 | ||
237 | if (copy_to_user(argp, &sustat, sizeof(sustat))) | |
238 | ret = -EFAULT; | |
239 | return ret; | |
240 | } | |
241 | ||
242 | static ssize_t | |
b028fcfc | 243 | nilfs_ioctl_do_get_vinfo(struct the_nilfs *nilfs, __u64 *posp, int flags, |
7942b919 KS |
244 | void *buf, size_t size, size_t nmembs) |
245 | { | |
246 | return nilfs_dat_get_vinfo(nilfs_dat_inode(nilfs), buf, nmembs); | |
247 | } | |
248 | ||
249 | static int nilfs_ioctl_get_vinfo(struct inode *inode, struct file *filp, | |
250 | unsigned int cmd, void __user *argp) | |
251 | { | |
252 | struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs; | |
253 | struct nilfs_argv argv; | |
7942b919 KS |
254 | int ret; |
255 | ||
256 | if (copy_from_user(&argv, argp, sizeof(argv))) | |
257 | return -EFAULT; | |
258 | ||
47420c79 | 259 | down_read(&nilfs->ns_segctor_sem); |
7942b919 KS |
260 | ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), |
261 | nilfs_ioctl_do_get_vinfo); | |
47420c79 RK |
262 | up_read(&nilfs->ns_segctor_sem); |
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 ssize_t | |
b028fcfc | 272 | nilfs_ioctl_do_get_bdescs(struct the_nilfs *nilfs, __u64 *posp, int flags, |
7942b919 KS |
273 | void *buf, size_t size, size_t nmembs) |
274 | { | |
275 | struct inode *dat = nilfs_dat_inode(nilfs); | |
276 | struct nilfs_bmap *bmap = NILFS_I(dat)->i_bmap; | |
277 | struct nilfs_bdesc *bdescs = buf; | |
278 | int ret, i; | |
279 | ||
280 | for (i = 0; i < nmembs; i++) { | |
281 | ret = nilfs_bmap_lookup_at_level(bmap, | |
282 | bdescs[i].bd_offset, | |
283 | bdescs[i].bd_level + 1, | |
284 | &bdescs[i].bd_blocknr); | |
285 | if (ret < 0) { | |
286 | if (ret != -ENOENT) | |
287 | return ret; | |
288 | bdescs[i].bd_blocknr = 0; | |
289 | } | |
290 | } | |
291 | return nmembs; | |
292 | } | |
293 | ||
294 | static int nilfs_ioctl_get_bdescs(struct inode *inode, struct file *filp, | |
295 | unsigned int cmd, void __user *argp) | |
296 | { | |
297 | struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs; | |
298 | struct nilfs_argv argv; | |
7942b919 KS |
299 | int ret; |
300 | ||
301 | if (copy_from_user(&argv, argp, sizeof(argv))) | |
302 | return -EFAULT; | |
303 | ||
47420c79 | 304 | down_read(&nilfs->ns_segctor_sem); |
7942b919 KS |
305 | ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), |
306 | nilfs_ioctl_do_get_bdescs); | |
47420c79 RK |
307 | up_read(&nilfs->ns_segctor_sem); |
308 | if (ret < 0) | |
309 | return ret; | |
7942b919 KS |
310 | |
311 | if (copy_to_user(argp, &argv, sizeof(argv))) | |
312 | ret = -EFAULT; | |
313 | return ret; | |
314 | } | |
315 | ||
316 | static int nilfs_ioctl_move_inode_block(struct inode *inode, | |
317 | struct nilfs_vdesc *vdesc, | |
318 | struct list_head *buffers) | |
319 | { | |
320 | struct buffer_head *bh; | |
321 | int ret; | |
322 | ||
323 | if (vdesc->vd_flags == 0) | |
324 | ret = nilfs_gccache_submit_read_data( | |
325 | inode, vdesc->vd_offset, vdesc->vd_blocknr, | |
326 | vdesc->vd_vblocknr, &bh); | |
327 | else | |
328 | ret = nilfs_gccache_submit_read_node( | |
329 | inode, vdesc->vd_blocknr, vdesc->vd_vblocknr, &bh); | |
330 | ||
331 | if (unlikely(ret < 0)) { | |
332 | if (ret == -ENOENT) | |
333 | printk(KERN_CRIT | |
334 | "%s: invalid virtual block address (%s): " | |
335 | "ino=%llu, cno=%llu, offset=%llu, " | |
336 | "blocknr=%llu, vblocknr=%llu\n", | |
337 | __func__, vdesc->vd_flags ? "node" : "data", | |
338 | (unsigned long long)vdesc->vd_ino, | |
339 | (unsigned long long)vdesc->vd_cno, | |
340 | (unsigned long long)vdesc->vd_offset, | |
341 | (unsigned long long)vdesc->vd_blocknr, | |
342 | (unsigned long long)vdesc->vd_vblocknr); | |
343 | return ret; | |
344 | } | |
345 | bh->b_private = vdesc; | |
346 | list_add_tail(&bh->b_assoc_buffers, buffers); | |
347 | return 0; | |
348 | } | |
349 | ||
350 | static ssize_t | |
b028fcfc | 351 | nilfs_ioctl_do_move_blocks(struct the_nilfs *nilfs, __u64 *posp, int flags, |
7942b919 KS |
352 | void *buf, size_t size, size_t nmembs) |
353 | { | |
354 | struct inode *inode; | |
355 | struct nilfs_vdesc *vdesc; | |
356 | struct buffer_head *bh, *n; | |
357 | LIST_HEAD(buffers); | |
358 | ino_t ino; | |
359 | __u64 cno; | |
360 | int i, ret; | |
361 | ||
362 | for (i = 0, vdesc = buf; i < nmembs; ) { | |
363 | ino = vdesc->vd_ino; | |
364 | cno = vdesc->vd_cno; | |
365 | inode = nilfs_gc_iget(nilfs, ino, cno); | |
366 | if (unlikely(inode == NULL)) { | |
367 | ret = -ENOMEM; | |
368 | goto failed; | |
369 | } | |
370 | do { | |
371 | ret = nilfs_ioctl_move_inode_block(inode, vdesc, | |
372 | &buffers); | |
373 | if (unlikely(ret < 0)) | |
374 | goto failed; | |
375 | vdesc++; | |
376 | } while (++i < nmembs && | |
377 | vdesc->vd_ino == ino && vdesc->vd_cno == cno); | |
378 | } | |
379 | ||
380 | list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) { | |
381 | ret = nilfs_gccache_wait_and_mark_dirty(bh); | |
382 | if (unlikely(ret < 0)) { | |
383 | if (ret == -EEXIST) { | |
384 | vdesc = bh->b_private; | |
385 | printk(KERN_CRIT | |
386 | "%s: conflicting %s buffer: " | |
387 | "ino=%llu, cno=%llu, offset=%llu, " | |
388 | "blocknr=%llu, vblocknr=%llu\n", | |
389 | __func__, | |
390 | vdesc->vd_flags ? "node" : "data", | |
391 | (unsigned long long)vdesc->vd_ino, | |
392 | (unsigned long long)vdesc->vd_cno, | |
393 | (unsigned long long)vdesc->vd_offset, | |
394 | (unsigned long long)vdesc->vd_blocknr, | |
395 | (unsigned long long)vdesc->vd_vblocknr); | |
396 | } | |
397 | goto failed; | |
398 | } | |
399 | list_del_init(&bh->b_assoc_buffers); | |
400 | bh->b_private = NULL; | |
401 | brelse(bh); | |
402 | } | |
403 | return nmembs; | |
404 | ||
405 | failed: | |
406 | list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) { | |
407 | list_del_init(&bh->b_assoc_buffers); | |
408 | bh->b_private = NULL; | |
409 | brelse(bh); | |
410 | } | |
411 | return ret; | |
412 | } | |
413 | ||
414 | static inline int nilfs_ioctl_move_blocks(struct the_nilfs *nilfs, | |
415 | struct nilfs_argv *argv, | |
416 | int dir) | |
417 | { | |
418 | return nilfs_ioctl_wrap_copy(nilfs, argv, dir, | |
419 | nilfs_ioctl_do_move_blocks); | |
420 | } | |
421 | ||
422 | static ssize_t | |
b028fcfc | 423 | nilfs_ioctl_do_delete_checkpoints(struct the_nilfs *nilfs, __u64 *posp, |
7942b919 KS |
424 | int flags, void *buf, size_t size, |
425 | size_t nmembs) | |
426 | { | |
427 | struct inode *cpfile = nilfs->ns_cpfile; | |
428 | struct nilfs_period *periods = buf; | |
429 | int ret, i; | |
430 | ||
431 | for (i = 0; i < nmembs; i++) { | |
432 | ret = nilfs_cpfile_delete_checkpoints( | |
433 | cpfile, periods[i].p_start, periods[i].p_end); | |
434 | if (ret < 0) | |
435 | return ret; | |
436 | } | |
437 | return nmembs; | |
438 | } | |
439 | ||
440 | static inline int nilfs_ioctl_delete_checkpoints(struct the_nilfs *nilfs, | |
441 | struct nilfs_argv *argv, | |
442 | int dir) | |
443 | { | |
444 | return nilfs_ioctl_wrap_copy(nilfs, argv, dir, | |
445 | nilfs_ioctl_do_delete_checkpoints); | |
446 | } | |
447 | ||
448 | static ssize_t | |
b028fcfc | 449 | nilfs_ioctl_do_free_vblocknrs(struct the_nilfs *nilfs, __u64 *posp, int flags, |
7942b919 KS |
450 | void *buf, size_t size, size_t nmembs) |
451 | { | |
452 | int ret = nilfs_dat_freev(nilfs_dat_inode(nilfs), buf, nmembs); | |
453 | ||
454 | return (ret < 0) ? ret : nmembs; | |
455 | } | |
456 | ||
457 | static inline int nilfs_ioctl_free_vblocknrs(struct the_nilfs *nilfs, | |
458 | struct nilfs_argv *argv, | |
459 | int dir) | |
460 | { | |
461 | return nilfs_ioctl_wrap_copy(nilfs, argv, dir, | |
462 | nilfs_ioctl_do_free_vblocknrs); | |
463 | } | |
464 | ||
465 | static ssize_t | |
b028fcfc RK |
466 | nilfs_ioctl_do_mark_blocks_dirty(struct the_nilfs *nilfs, __u64 *posp, |
467 | int flags, void *buf, size_t size, | |
468 | size_t nmembs) | |
7942b919 KS |
469 | { |
470 | struct inode *dat = nilfs_dat_inode(nilfs); | |
471 | struct nilfs_bmap *bmap = NILFS_I(dat)->i_bmap; | |
472 | struct nilfs_bdesc *bdescs = buf; | |
473 | int ret, i; | |
474 | ||
475 | for (i = 0; i < nmembs; i++) { | |
476 | /* XXX: use macro or inline func to check liveness */ | |
477 | ret = nilfs_bmap_lookup_at_level(bmap, | |
478 | bdescs[i].bd_offset, | |
479 | bdescs[i].bd_level + 1, | |
480 | &bdescs[i].bd_blocknr); | |
481 | if (ret < 0) { | |
482 | if (ret != -ENOENT) | |
483 | return ret; | |
484 | bdescs[i].bd_blocknr = 0; | |
485 | } | |
486 | if (bdescs[i].bd_blocknr != bdescs[i].bd_oblocknr) | |
487 | /* skip dead block */ | |
488 | continue; | |
489 | if (bdescs[i].bd_level == 0) { | |
490 | ret = nilfs_mdt_mark_block_dirty(dat, | |
491 | bdescs[i].bd_offset); | |
492 | if (ret < 0) { | |
493 | BUG_ON(ret == -ENOENT); | |
494 | return ret; | |
495 | } | |
496 | } else { | |
497 | ret = nilfs_bmap_mark(bmap, bdescs[i].bd_offset, | |
498 | bdescs[i].bd_level); | |
499 | if (ret < 0) { | |
500 | BUG_ON(ret == -ENOENT); | |
501 | return ret; | |
502 | } | |
503 | } | |
504 | } | |
505 | return nmembs; | |
506 | } | |
507 | ||
508 | static inline int nilfs_ioctl_mark_blocks_dirty(struct the_nilfs *nilfs, | |
509 | struct nilfs_argv *argv, | |
510 | int dir) | |
511 | { | |
512 | return nilfs_ioctl_wrap_copy(nilfs, argv, dir, | |
513 | nilfs_ioctl_do_mark_blocks_dirty); | |
514 | } | |
515 | ||
516 | static ssize_t | |
b028fcfc | 517 | nilfs_ioctl_do_free_segments(struct the_nilfs *nilfs, __u64 *posp, int flags, |
7942b919 KS |
518 | void *buf, size_t size, size_t nmembs) |
519 | { | |
520 | struct nilfs_sb_info *sbi = nilfs_get_writer(nilfs); | |
521 | int ret; | |
522 | ||
523 | BUG_ON(!sbi); | |
524 | ret = nilfs_segctor_add_segments_to_be_freed( | |
525 | NILFS_SC(sbi), buf, nmembs); | |
526 | nilfs_put_writer(nilfs); | |
527 | ||
528 | return (ret < 0) ? ret : nmembs; | |
529 | } | |
530 | ||
531 | static inline int nilfs_ioctl_free_segments(struct the_nilfs *nilfs, | |
532 | struct nilfs_argv *argv, | |
533 | int dir) | |
534 | { | |
535 | return nilfs_ioctl_wrap_copy(nilfs, argv, dir, | |
536 | nilfs_ioctl_do_free_segments); | |
537 | } | |
538 | ||
539 | int nilfs_ioctl_prepare_clean_segments(struct the_nilfs *nilfs, | |
540 | void __user *argp) | |
541 | { | |
542 | struct nilfs_argv argv[5]; | |
543 | int dir, ret; | |
544 | ||
545 | if (copy_from_user(argv, argp, sizeof(argv))) | |
546 | return -EFAULT; | |
547 | ||
548 | dir = _IOC_WRITE; | |
549 | ret = nilfs_ioctl_move_blocks(nilfs, &argv[0], dir); | |
550 | if (ret < 0) | |
551 | goto out_move_blks; | |
552 | ret = nilfs_ioctl_delete_checkpoints(nilfs, &argv[1], dir); | |
553 | if (ret < 0) | |
554 | goto out_del_cps; | |
555 | ret = nilfs_ioctl_free_vblocknrs(nilfs, &argv[2], dir); | |
556 | if (ret < 0) | |
557 | goto out_free_vbns; | |
558 | ret = nilfs_ioctl_mark_blocks_dirty(nilfs, &argv[3], dir); | |
559 | if (ret < 0) | |
560 | goto out_free_vbns; | |
561 | ret = nilfs_ioctl_free_segments(nilfs, &argv[4], dir); | |
562 | if (ret < 0) | |
563 | goto out_free_segs; | |
564 | ||
565 | return 0; | |
566 | ||
567 | out_free_segs: | |
568 | BUG(); /* XXX: not implemented yet */ | |
569 | out_free_vbns: | |
570 | BUG();/* XXX: not implemented yet */ | |
571 | out_del_cps: | |
572 | BUG();/* XXX: not implemented yet */ | |
573 | out_move_blks: | |
574 | nilfs_remove_all_gcinode(nilfs); | |
575 | return ret; | |
576 | } | |
577 | ||
578 | static int nilfs_ioctl_clean_segments(struct inode *inode, struct file *filp, | |
579 | unsigned int cmd, void __user *argp) | |
580 | { | |
581 | int ret; | |
582 | ||
583 | if (!capable(CAP_SYS_ADMIN)) | |
584 | return -EPERM; | |
585 | ||
586 | ret = nilfs_clean_segments(inode->i_sb, argp); | |
587 | clear_nilfs_cond_nongc_write(NILFS_SB(inode->i_sb)->s_nilfs); | |
588 | return ret; | |
589 | } | |
590 | ||
591 | static int nilfs_ioctl_test_cond(struct the_nilfs *nilfs, int cond) | |
592 | { | |
593 | return (cond & NILFS_TIMEDWAIT_SEG_WRITE) && | |
594 | nilfs_cond_nongc_write(nilfs); | |
595 | } | |
596 | ||
597 | static void nilfs_ioctl_clear_cond(struct the_nilfs *nilfs, int cond) | |
598 | { | |
599 | if (cond & NILFS_TIMEDWAIT_SEG_WRITE) | |
600 | clear_nilfs_cond_nongc_write(nilfs); | |
601 | } | |
602 | ||
603 | static int nilfs_ioctl_timedwait(struct inode *inode, struct file *filp, | |
604 | unsigned int cmd, void __user *argp) | |
605 | { | |
606 | struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs; | |
607 | struct nilfs_wait_cond wc; | |
608 | long ret; | |
609 | ||
610 | if (!capable(CAP_SYS_ADMIN)) | |
611 | return -EPERM; | |
612 | if (copy_from_user(&wc, argp, sizeof(wc))) | |
613 | return -EFAULT; | |
614 | ||
615 | unlock_kernel(); | |
616 | ret = wc.wc_flags ? | |
617 | wait_event_interruptible_timeout( | |
618 | nilfs->ns_cleanerd_wq, | |
619 | nilfs_ioctl_test_cond(nilfs, wc.wc_cond), | |
620 | timespec_to_jiffies(&wc.wc_timeout)) : | |
621 | wait_event_interruptible( | |
622 | nilfs->ns_cleanerd_wq, | |
623 | nilfs_ioctl_test_cond(nilfs, wc.wc_cond)); | |
624 | lock_kernel(); | |
625 | nilfs_ioctl_clear_cond(nilfs, wc.wc_cond); | |
626 | ||
627 | if (ret > 0) { | |
628 | jiffies_to_timespec(ret, &wc.wc_timeout); | |
629 | if (copy_to_user(argp, &wc, sizeof(wc))) | |
630 | return -EFAULT; | |
631 | return 0; | |
632 | } | |
633 | if (ret != 0) | |
634 | return -EINTR; | |
635 | ||
636 | return wc.wc_flags ? -ETIME : 0; | |
637 | } | |
638 | ||
639 | static int nilfs_ioctl_sync(struct inode *inode, struct file *filp, | |
640 | unsigned int cmd, void __user *argp) | |
641 | { | |
642 | __u64 cno; | |
643 | int ret; | |
644 | ||
645 | ret = nilfs_construct_segment(inode->i_sb); | |
646 | if (ret < 0) | |
647 | return ret; | |
648 | ||
649 | if (argp != NULL) { | |
650 | cno = NILFS_SB(inode->i_sb)->s_nilfs->ns_cno - 1; | |
651 | if (copy_to_user(argp, &cno, sizeof(cno))) | |
652 | return -EFAULT; | |
653 | } | |
654 | return 0; | |
655 | } | |
656 | ||
657 | int nilfs_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, | |
658 | unsigned long arg) | |
659 | { | |
660 | void __user *argp = (void * __user *)arg; | |
661 | ||
662 | switch (cmd) { | |
663 | case NILFS_IOCTL_CHANGE_CPMODE: | |
664 | return nilfs_ioctl_change_cpmode(inode, filp, cmd, argp); | |
665 | case NILFS_IOCTL_DELETE_CHECKPOINT: | |
666 | return nilfs_ioctl_delete_checkpoint(inode, filp, cmd, argp); | |
667 | case NILFS_IOCTL_GET_CPINFO: | |
668 | return nilfs_ioctl_get_cpinfo(inode, filp, cmd, argp); | |
669 | case NILFS_IOCTL_GET_CPSTAT: | |
670 | return nilfs_ioctl_get_cpstat(inode, filp, cmd, argp); | |
671 | case NILFS_IOCTL_GET_SUINFO: | |
672 | return nilfs_ioctl_get_suinfo(inode, filp, cmd, argp); | |
673 | case NILFS_IOCTL_GET_SUSTAT: | |
674 | return nilfs_ioctl_get_sustat(inode, filp, cmd, argp); | |
675 | case NILFS_IOCTL_GET_VINFO: | |
676 | /* XXX: rename to ??? */ | |
677 | return nilfs_ioctl_get_vinfo(inode, filp, cmd, argp); | |
678 | case NILFS_IOCTL_GET_BDESCS: | |
679 | return nilfs_ioctl_get_bdescs(inode, filp, cmd, argp); | |
680 | case NILFS_IOCTL_CLEAN_SEGMENTS: | |
681 | return nilfs_ioctl_clean_segments(inode, filp, cmd, argp); | |
682 | case NILFS_IOCTL_TIMEDWAIT: | |
683 | return nilfs_ioctl_timedwait(inode, filp, cmd, argp); | |
684 | case NILFS_IOCTL_SYNC: | |
685 | return nilfs_ioctl_sync(inode, filp, cmd, argp); | |
686 | default: | |
687 | return -ENOTTY; | |
688 | } | |
689 | } | |
690 | ||
691 | /* compat_ioctl */ | |
692 | #ifdef CONFIG_COMPAT | |
693 | #include <linux/compat.h> | |
694 | ||
695 | static int nilfs_compat_locked_ioctl(struct inode *inode, struct file *filp, | |
696 | unsigned int cmd, unsigned long arg) | |
697 | { | |
698 | int ret; | |
699 | ||
700 | lock_kernel(); | |
701 | ret = nilfs_ioctl(inode, filp, cmd, arg); | |
702 | unlock_kernel(); | |
703 | return ret; | |
704 | } | |
705 | ||
706 | static int | |
707 | nilfs_compat_ioctl_uargv32_to_uargv(struct nilfs_argv32 __user *uargv32, | |
708 | struct nilfs_argv __user *uargv) | |
709 | { | |
710 | compat_uptr_t base; | |
711 | compat_size_t nmembs, size; | |
712 | compat_int_t index, flags; | |
713 | ||
714 | if (get_user(base, &uargv32->v_base) || | |
715 | put_user(compat_ptr(base), &uargv->v_base) || | |
716 | get_user(nmembs, &uargv32->v_nmembs) || | |
717 | put_user(nmembs, &uargv->v_nmembs) || | |
718 | get_user(size, &uargv32->v_size) || | |
719 | put_user(size, &uargv->v_size) || | |
720 | get_user(index, &uargv32->v_index) || | |
721 | put_user(index, &uargv->v_index) || | |
722 | get_user(flags, &uargv32->v_flags) || | |
723 | put_user(flags, &uargv->v_flags)) | |
724 | return -EFAULT; | |
725 | return 0; | |
726 | } | |
727 | ||
728 | static int | |
729 | nilfs_compat_ioctl_uargv_to_uargv32(struct nilfs_argv __user *uargv, | |
730 | struct nilfs_argv32 __user *uargv32) | |
731 | { | |
732 | size_t nmembs; | |
733 | ||
734 | if (get_user(nmembs, &uargv->v_nmembs) || | |
735 | put_user(nmembs, &uargv32->v_nmembs)) | |
736 | return -EFAULT; | |
737 | return 0; | |
738 | } | |
739 | ||
740 | static int | |
741 | nilfs_compat_ioctl_get_by_argv(struct inode *inode, struct file *filp, | |
742 | unsigned int cmd, unsigned long arg) | |
743 | { | |
744 | struct nilfs_argv __user *uargv; | |
745 | struct nilfs_argv32 __user *uargv32; | |
746 | int ret; | |
747 | ||
748 | uargv = compat_alloc_user_space(sizeof(struct nilfs_argv)); | |
749 | uargv32 = compat_ptr(arg); | |
750 | ret = nilfs_compat_ioctl_uargv32_to_uargv(uargv32, uargv); | |
751 | if (ret < 0) | |
752 | return ret; | |
753 | ||
754 | ret = nilfs_compat_locked_ioctl(inode, filp, cmd, (unsigned long)uargv); | |
755 | if (ret < 0) | |
756 | return ret; | |
757 | ||
758 | return nilfs_compat_ioctl_uargv_to_uargv32(uargv, uargv32); | |
759 | } | |
760 | ||
761 | static int | |
762 | nilfs_compat_ioctl_change_cpmode(struct inode *inode, struct file *filp, | |
763 | unsigned int cmd, unsigned long arg) | |
764 | { | |
765 | struct nilfs_cpmode __user *ucpmode; | |
766 | struct nilfs_cpmode32 __user *ucpmode32; | |
767 | int mode; | |
768 | ||
769 | ucpmode = compat_alloc_user_space(sizeof(struct nilfs_cpmode)); | |
770 | ucpmode32 = compat_ptr(arg); | |
771 | if (copy_in_user(&ucpmode->cm_cno, &ucpmode32->cm_cno, | |
772 | sizeof(__u64)) || | |
773 | get_user(mode, &ucpmode32->cm_mode) || | |
774 | put_user(mode, &ucpmode->cm_mode)) | |
775 | return -EFAULT; | |
776 | ||
777 | return nilfs_compat_locked_ioctl( | |
778 | inode, filp, cmd, (unsigned long)ucpmode); | |
779 | } | |
780 | ||
781 | ||
782 | static inline int | |
783 | nilfs_compat_ioctl_delete_checkpoint(struct inode *inode, struct file *filp, | |
784 | unsigned int cmd, unsigned long arg) | |
785 | { | |
786 | return nilfs_compat_locked_ioctl(inode, filp, cmd, arg); | |
787 | } | |
788 | ||
789 | static inline int | |
790 | nilfs_compat_ioctl_get_cpinfo(struct inode *inode, struct file *filp, | |
791 | unsigned int cmd, unsigned long arg) | |
792 | { | |
793 | return nilfs_compat_ioctl_get_by_argv(inode, filp, cmd, arg); | |
794 | } | |
795 | ||
796 | static inline int | |
797 | nilfs_compat_ioctl_get_cpstat(struct inode *inode, struct file *filp, | |
798 | unsigned int cmd, unsigned long arg) | |
799 | { | |
800 | return nilfs_compat_locked_ioctl(inode, filp, cmd, arg); | |
801 | } | |
802 | ||
803 | static inline int | |
804 | nilfs_compat_ioctl_get_suinfo(struct inode *inode, struct file *filp, | |
805 | unsigned int cmd, unsigned long arg) | |
806 | { | |
807 | return nilfs_compat_ioctl_get_by_argv(inode, filp, cmd, arg); | |
808 | } | |
809 | ||
810 | static int | |
811 | nilfs_compat_ioctl_get_sustat(struct inode *inode, struct file *filp, | |
812 | unsigned int cmd, unsigned long arg) | |
813 | { | |
814 | struct nilfs_sustat __user *usustat; | |
815 | struct nilfs_sustat32 __user *usustat32; | |
816 | time_t ctime, nongc_ctime; | |
817 | int ret; | |
818 | ||
819 | usustat = compat_alloc_user_space(sizeof(struct nilfs_sustat)); | |
820 | ret = nilfs_compat_locked_ioctl(inode, filp, cmd, | |
821 | (unsigned long)usustat); | |
822 | if (ret < 0) | |
823 | return ret; | |
824 | ||
825 | usustat32 = compat_ptr(arg); | |
826 | if (copy_in_user(&usustat32->ss_nsegs, &usustat->ss_nsegs, | |
827 | sizeof(__u64)) || | |
828 | copy_in_user(&usustat32->ss_ncleansegs, &usustat->ss_ncleansegs, | |
829 | sizeof(__u64)) || | |
830 | copy_in_user(&usustat32->ss_ndirtysegs, &usustat->ss_ndirtysegs, | |
831 | sizeof(__u64)) || | |
832 | get_user(ctime, &usustat->ss_ctime) || | |
833 | put_user(ctime, &usustat32->ss_ctime) || | |
834 | get_user(nongc_ctime, &usustat->ss_nongc_ctime) || | |
835 | put_user(nongc_ctime, &usustat32->ss_nongc_ctime)) | |
836 | return -EFAULT; | |
837 | return 0; | |
838 | } | |
839 | ||
840 | static inline int | |
841 | nilfs_compat_ioctl_get_vinfo(struct inode *inode, struct file *filp, | |
842 | unsigned int cmd, unsigned long arg) | |
843 | { | |
844 | return nilfs_compat_ioctl_get_by_argv(inode, filp, cmd, arg); | |
845 | } | |
846 | ||
847 | static inline int | |
848 | nilfs_compat_ioctl_get_bdescs(struct inode *inode, struct file *filp, | |
849 | unsigned int cmd, unsigned long arg) | |
850 | { | |
851 | return nilfs_compat_ioctl_get_by_argv(inode, filp, cmd, arg); | |
852 | } | |
853 | ||
854 | static int | |
855 | nilfs_compat_ioctl_clean_segments(struct inode *inode, struct file *filp, | |
856 | unsigned int cmd, unsigned long arg) | |
857 | { | |
858 | struct nilfs_argv __user *uargv; | |
859 | struct nilfs_argv32 __user *uargv32; | |
860 | int i, ret; | |
861 | ||
862 | uargv = compat_alloc_user_space(sizeof(struct nilfs_argv) * 5); | |
863 | uargv32 = compat_ptr(arg); | |
864 | for (i = 0; i < 5; i++) { | |
865 | ret = nilfs_compat_ioctl_uargv32_to_uargv(&uargv32[i], | |
866 | &uargv[i]); | |
867 | if (ret < 0) | |
868 | return ret; | |
869 | } | |
870 | return nilfs_compat_locked_ioctl( | |
871 | inode, filp, cmd, (unsigned long)uargv); | |
872 | } | |
873 | ||
874 | static int | |
875 | nilfs_compat_ioctl_timedwait(struct inode *inode, struct file *filp, | |
876 | unsigned int cmd, unsigned long arg) | |
877 | { | |
878 | struct nilfs_wait_cond __user *uwcond; | |
879 | struct nilfs_wait_cond32 __user *uwcond32; | |
880 | struct timespec ts; | |
881 | int cond, flags, ret; | |
882 | ||
883 | uwcond = compat_alloc_user_space(sizeof(struct nilfs_wait_cond)); | |
884 | uwcond32 = compat_ptr(arg); | |
885 | if (get_user(cond, &uwcond32->wc_cond) || | |
886 | put_user(cond, &uwcond->wc_cond) || | |
887 | get_user(flags, &uwcond32->wc_flags) || | |
888 | put_user(flags, &uwcond->wc_flags) || | |
889 | get_user(ts.tv_sec, &uwcond32->wc_timeout.tv_sec) || | |
890 | get_user(ts.tv_nsec, &uwcond32->wc_timeout.tv_nsec) || | |
891 | put_user(ts.tv_sec, &uwcond->wc_timeout.tv_sec) || | |
892 | put_user(ts.tv_nsec, &uwcond->wc_timeout.tv_nsec)) | |
893 | return -EFAULT; | |
894 | ||
895 | ret = nilfs_compat_locked_ioctl(inode, filp, cmd, | |
896 | (unsigned long)uwcond); | |
897 | if (ret < 0) | |
898 | return ret; | |
899 | ||
900 | if (get_user(ts.tv_sec, &uwcond->wc_timeout.tv_sec) || | |
901 | get_user(ts.tv_nsec, &uwcond->wc_timeout.tv_nsec) || | |
902 | put_user(ts.tv_sec, &uwcond32->wc_timeout.tv_sec) || | |
903 | put_user(ts.tv_nsec, &uwcond32->wc_timeout.tv_nsec)) | |
904 | return -EFAULT; | |
905 | ||
906 | return 0; | |
907 | } | |
908 | ||
909 | static int nilfs_compat_ioctl_sync(struct inode *inode, struct file *filp, | |
910 | unsigned int cmd, unsigned long arg) | |
911 | { | |
912 | return nilfs_compat_locked_ioctl(inode, filp, cmd, arg); | |
913 | } | |
914 | ||
915 | long nilfs_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) | |
916 | { | |
917 | struct inode *inode = filp->f_dentry->d_inode; | |
918 | ||
919 | switch (cmd) { | |
920 | case NILFS_IOCTL32_CHANGE_CPMODE: | |
921 | return nilfs_compat_ioctl_change_cpmode( | |
922 | inode, filp, NILFS_IOCTL_CHANGE_CPMODE, arg); | |
923 | case NILFS_IOCTL_DELETE_CHECKPOINT: | |
924 | return nilfs_compat_ioctl_delete_checkpoint( | |
925 | inode, filp, cmd, arg); | |
926 | case NILFS_IOCTL32_GET_CPINFO: | |
927 | return nilfs_compat_ioctl_get_cpinfo( | |
928 | inode, filp, NILFS_IOCTL_GET_CPINFO, arg); | |
929 | case NILFS_IOCTL_GET_CPSTAT: | |
930 | return nilfs_compat_ioctl_get_cpstat(inode, filp, cmd, arg); | |
931 | case NILFS_IOCTL32_GET_SUINFO: | |
932 | return nilfs_compat_ioctl_get_suinfo( | |
933 | inode, filp, NILFS_IOCTL_GET_SUINFO, arg); | |
934 | case NILFS_IOCTL32_GET_SUSTAT: | |
935 | return nilfs_compat_ioctl_get_sustat( | |
936 | inode, filp, NILFS_IOCTL_GET_SUSTAT, arg); | |
937 | case NILFS_IOCTL32_GET_VINFO: | |
938 | return nilfs_compat_ioctl_get_vinfo( | |
939 | inode, filp, NILFS_IOCTL_GET_VINFO, arg); | |
940 | case NILFS_IOCTL32_GET_BDESCS: | |
941 | return nilfs_compat_ioctl_get_bdescs( | |
942 | inode, filp, NILFS_IOCTL_GET_BDESCS, arg); | |
943 | case NILFS_IOCTL32_CLEAN_SEGMENTS: | |
944 | return nilfs_compat_ioctl_clean_segments( | |
945 | inode, filp, NILFS_IOCTL_CLEAN_SEGMENTS, arg); | |
946 | case NILFS_IOCTL32_TIMEDWAIT: | |
947 | return nilfs_compat_ioctl_timedwait( | |
948 | inode, filp, NILFS_IOCTL_TIMEDWAIT, arg); | |
949 | case NILFS_IOCTL_SYNC: | |
950 | return nilfs_compat_ioctl_sync(inode, filp, cmd, arg); | |
951 | default: | |
952 | return -ENOIOCTLCMD; | |
953 | } | |
954 | } | |
955 | #endif |