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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 | ||
37 | #define KMALLOC_SIZE_MIN 4096 /* 4KB */ | |
38 | #define KMALLOC_SIZE_MAX 131072 /* 128 KB */ | |
39 | ||
40 | static int nilfs_ioctl_wrap_copy(struct the_nilfs *nilfs, | |
41 | struct nilfs_argv *argv, int dir, | |
42 | ssize_t (*dofunc)(struct the_nilfs *, | |
43 | int, int, | |
44 | void *, size_t, size_t)) | |
45 | { | |
46 | void *buf; | |
47 | size_t ksize, maxmembs, total, n; | |
48 | ssize_t nr; | |
49 | int ret, i; | |
50 | ||
51 | if (argv->v_nmembs == 0) | |
52 | return 0; | |
53 | ||
54 | for (ksize = KMALLOC_SIZE_MAX; ksize >= KMALLOC_SIZE_MIN; ksize /= 2) { | |
55 | buf = kmalloc(ksize, GFP_NOFS); | |
56 | if (buf != NULL) | |
57 | break; | |
58 | } | |
59 | if (ksize < KMALLOC_SIZE_MIN) | |
60 | return -ENOMEM; | |
61 | maxmembs = ksize / argv->v_size; | |
62 | ||
63 | ret = 0; | |
64 | total = 0; | |
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) && | |
69 | copy_from_user(buf, | |
70 | (void __user *)argv->v_base + argv->v_size * i, | |
71 | argv->v_size * n)) { | |
72 | ret = -EFAULT; | |
73 | break; | |
74 | } | |
75 | nr = (*dofunc)(nilfs, argv->v_index + i, argv->v_flags, buf, | |
76 | argv->v_size, n); | |
77 | if (nr < 0) { | |
78 | ret = nr; | |
79 | break; | |
80 | } | |
81 | if ((dir & _IOC_READ) && | |
82 | copy_to_user( | |
83 | (void __user *)argv->v_base + argv->v_size * i, | |
84 | buf, argv->v_size * nr)) { | |
85 | ret = -EFAULT; | |
86 | break; | |
87 | } | |
88 | total += nr; | |
89 | } | |
90 | argv->v_nmembs = total; | |
91 | ||
92 | kfree(buf); | |
93 | return ret; | |
94 | } | |
95 | ||
96 | static int nilfs_ioctl_change_cpmode(struct inode *inode, struct file *filp, | |
97 | unsigned int cmd, void __user *argp) | |
98 | { | |
99 | struct inode *cpfile = NILFS_SB(inode->i_sb)->s_nilfs->ns_cpfile; | |
100 | struct nilfs_transaction_info ti; | |
101 | struct nilfs_cpmode cpmode; | |
102 | int ret; | |
103 | ||
104 | if (!capable(CAP_SYS_ADMIN)) | |
105 | return -EPERM; | |
106 | if (copy_from_user(&cpmode, argp, sizeof(cpmode))) | |
107 | return -EFAULT; | |
108 | ||
109 | nilfs_transaction_begin(inode->i_sb, &ti, 0); | |
110 | ret = nilfs_cpfile_change_cpmode( | |
111 | cpfile, cpmode.cm_cno, cpmode.cm_mode); | |
112 | nilfs_transaction_end(inode->i_sb, !ret); | |
113 | return ret; | |
114 | } | |
115 | ||
116 | static int | |
117 | nilfs_ioctl_delete_checkpoint(struct inode *inode, struct file *filp, | |
118 | unsigned int cmd, void __user *argp) | |
119 | { | |
120 | struct inode *cpfile = NILFS_SB(inode->i_sb)->s_nilfs->ns_cpfile; | |
121 | struct nilfs_transaction_info ti; | |
122 | __u64 cno; | |
123 | int ret; | |
124 | ||
125 | if (!capable(CAP_SYS_ADMIN)) | |
126 | return -EPERM; | |
127 | if (copy_from_user(&cno, argp, sizeof(cno))) | |
128 | return -EFAULT; | |
129 | ||
130 | nilfs_transaction_begin(inode->i_sb, &ti, 0); | |
131 | ret = nilfs_cpfile_delete_checkpoint(cpfile, cno); | |
132 | nilfs_transaction_end(inode->i_sb, !ret); | |
133 | return ret; | |
134 | } | |
135 | ||
136 | static ssize_t | |
137 | nilfs_ioctl_do_get_cpinfo(struct the_nilfs *nilfs, int index, int flags, | |
138 | void *buf, size_t size, size_t nmembs) | |
139 | { | |
140 | return nilfs_cpfile_get_cpinfo(nilfs->ns_cpfile, index, flags, buf, | |
141 | nmembs); | |
142 | } | |
143 | ||
144 | static int nilfs_ioctl_get_cpinfo(struct inode *inode, struct file *filp, | |
145 | unsigned int cmd, void __user *argp) | |
146 | { | |
147 | struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs; | |
148 | struct nilfs_argv argv; | |
149 | struct nilfs_transaction_info ti; | |
150 | int ret; | |
151 | ||
152 | if (copy_from_user(&argv, argp, sizeof(argv))) | |
153 | return -EFAULT; | |
154 | ||
155 | nilfs_transaction_begin(inode->i_sb, &ti, 0); | |
156 | ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), | |
157 | nilfs_ioctl_do_get_cpinfo); | |
158 | nilfs_transaction_end(inode->i_sb, 0); | |
159 | ||
160 | if (copy_to_user(argp, &argv, sizeof(argv))) | |
161 | ret = -EFAULT; | |
162 | return ret; | |
163 | } | |
164 | ||
165 | static int nilfs_ioctl_get_cpstat(struct inode *inode, struct file *filp, | |
166 | unsigned int cmd, void __user *argp) | |
167 | { | |
168 | struct inode *cpfile = NILFS_SB(inode->i_sb)->s_nilfs->ns_cpfile; | |
169 | struct nilfs_cpstat cpstat; | |
170 | struct nilfs_transaction_info ti; | |
171 | int ret; | |
172 | ||
173 | nilfs_transaction_begin(inode->i_sb, &ti, 0); | |
174 | ret = nilfs_cpfile_get_stat(cpfile, &cpstat); | |
175 | nilfs_transaction_end(inode->i_sb, 0); | |
176 | if (ret < 0) | |
177 | return ret; | |
178 | ||
179 | if (copy_to_user(argp, &cpstat, sizeof(cpstat))) | |
180 | ret = -EFAULT; | |
181 | return ret; | |
182 | } | |
183 | ||
184 | static ssize_t | |
185 | nilfs_ioctl_do_get_suinfo(struct the_nilfs *nilfs, int index, int flags, | |
186 | void *buf, size_t size, size_t nmembs) | |
187 | { | |
188 | return nilfs_sufile_get_suinfo(nilfs->ns_sufile, index, buf, nmembs); | |
189 | } | |
190 | ||
191 | static int nilfs_ioctl_get_suinfo(struct inode *inode, struct file *filp, | |
192 | unsigned int cmd, void __user *argp) | |
193 | { | |
194 | struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs; | |
195 | struct nilfs_argv argv; | |
196 | struct nilfs_transaction_info ti; | |
197 | int ret; | |
198 | ||
199 | if (copy_from_user(&argv, argp, sizeof(argv))) | |
200 | return -EFAULT; | |
201 | ||
202 | nilfs_transaction_begin(inode->i_sb, &ti, 0); | |
203 | ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), | |
204 | nilfs_ioctl_do_get_suinfo); | |
205 | nilfs_transaction_end(inode->i_sb, 0); | |
206 | ||
207 | if (copy_to_user(argp, &argv, sizeof(argv))) | |
208 | ret = -EFAULT; | |
209 | return ret; | |
210 | } | |
211 | ||
212 | static int nilfs_ioctl_get_sustat(struct inode *inode, struct file *filp, | |
213 | unsigned int cmd, void __user *argp) | |
214 | { | |
215 | struct inode *sufile = NILFS_SB(inode->i_sb)->s_nilfs->ns_sufile; | |
216 | struct nilfs_sustat sustat; | |
217 | struct nilfs_transaction_info ti; | |
218 | int ret; | |
219 | ||
220 | nilfs_transaction_begin(inode->i_sb, &ti, 0); | |
221 | ret = nilfs_sufile_get_stat(sufile, &sustat); | |
222 | nilfs_transaction_end(inode->i_sb, 0); | |
223 | if (ret < 0) | |
224 | return ret; | |
225 | ||
226 | if (copy_to_user(argp, &sustat, sizeof(sustat))) | |
227 | ret = -EFAULT; | |
228 | return ret; | |
229 | } | |
230 | ||
231 | static ssize_t | |
232 | nilfs_ioctl_do_get_vinfo(struct the_nilfs *nilfs, int index, int flags, | |
233 | void *buf, size_t size, size_t nmembs) | |
234 | { | |
235 | return nilfs_dat_get_vinfo(nilfs_dat_inode(nilfs), buf, nmembs); | |
236 | } | |
237 | ||
238 | static int nilfs_ioctl_get_vinfo(struct inode *inode, struct file *filp, | |
239 | unsigned int cmd, void __user *argp) | |
240 | { | |
241 | struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs; | |
242 | struct nilfs_argv argv; | |
243 | struct nilfs_transaction_info ti; | |
244 | int ret; | |
245 | ||
246 | if (copy_from_user(&argv, argp, sizeof(argv))) | |
247 | return -EFAULT; | |
248 | ||
249 | nilfs_transaction_begin(inode->i_sb, &ti, 0); | |
250 | ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), | |
251 | nilfs_ioctl_do_get_vinfo); | |
252 | nilfs_transaction_end(inode->i_sb, 0); | |
253 | ||
254 | if (copy_to_user(argp, &argv, sizeof(argv))) | |
255 | ret = -EFAULT; | |
256 | return ret; | |
257 | } | |
258 | ||
259 | static ssize_t | |
260 | nilfs_ioctl_do_get_bdescs(struct the_nilfs *nilfs, int index, int flags, | |
261 | void *buf, size_t size, size_t nmembs) | |
262 | { | |
263 | struct inode *dat = nilfs_dat_inode(nilfs); | |
264 | struct nilfs_bmap *bmap = NILFS_I(dat)->i_bmap; | |
265 | struct nilfs_bdesc *bdescs = buf; | |
266 | int ret, i; | |
267 | ||
268 | for (i = 0; i < nmembs; i++) { | |
269 | ret = nilfs_bmap_lookup_at_level(bmap, | |
270 | bdescs[i].bd_offset, | |
271 | bdescs[i].bd_level + 1, | |
272 | &bdescs[i].bd_blocknr); | |
273 | if (ret < 0) { | |
274 | if (ret != -ENOENT) | |
275 | return ret; | |
276 | bdescs[i].bd_blocknr = 0; | |
277 | } | |
278 | } | |
279 | return nmembs; | |
280 | } | |
281 | ||
282 | static int nilfs_ioctl_get_bdescs(struct inode *inode, struct file *filp, | |
283 | unsigned int cmd, void __user *argp) | |
284 | { | |
285 | struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs; | |
286 | struct nilfs_argv argv; | |
287 | struct nilfs_transaction_info ti; | |
288 | int ret; | |
289 | ||
290 | if (copy_from_user(&argv, argp, sizeof(argv))) | |
291 | return -EFAULT; | |
292 | ||
293 | nilfs_transaction_begin(inode->i_sb, &ti, 0); | |
294 | ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), | |
295 | nilfs_ioctl_do_get_bdescs); | |
296 | nilfs_transaction_end(inode->i_sb, 0); | |
297 | ||
298 | if (copy_to_user(argp, &argv, sizeof(argv))) | |
299 | ret = -EFAULT; | |
300 | return ret; | |
301 | } | |
302 | ||
303 | static int nilfs_ioctl_move_inode_block(struct inode *inode, | |
304 | struct nilfs_vdesc *vdesc, | |
305 | struct list_head *buffers) | |
306 | { | |
307 | struct buffer_head *bh; | |
308 | int ret; | |
309 | ||
310 | if (vdesc->vd_flags == 0) | |
311 | ret = nilfs_gccache_submit_read_data( | |
312 | inode, vdesc->vd_offset, vdesc->vd_blocknr, | |
313 | vdesc->vd_vblocknr, &bh); | |
314 | else | |
315 | ret = nilfs_gccache_submit_read_node( | |
316 | inode, vdesc->vd_blocknr, vdesc->vd_vblocknr, &bh); | |
317 | ||
318 | if (unlikely(ret < 0)) { | |
319 | if (ret == -ENOENT) | |
320 | printk(KERN_CRIT | |
321 | "%s: invalid virtual block address (%s): " | |
322 | "ino=%llu, cno=%llu, offset=%llu, " | |
323 | "blocknr=%llu, vblocknr=%llu\n", | |
324 | __func__, vdesc->vd_flags ? "node" : "data", | |
325 | (unsigned long long)vdesc->vd_ino, | |
326 | (unsigned long long)vdesc->vd_cno, | |
327 | (unsigned long long)vdesc->vd_offset, | |
328 | (unsigned long long)vdesc->vd_blocknr, | |
329 | (unsigned long long)vdesc->vd_vblocknr); | |
330 | return ret; | |
331 | } | |
332 | bh->b_private = vdesc; | |
333 | list_add_tail(&bh->b_assoc_buffers, buffers); | |
334 | return 0; | |
335 | } | |
336 | ||
337 | static ssize_t | |
338 | nilfs_ioctl_do_move_blocks(struct the_nilfs *nilfs, int index, int flags, | |
339 | void *buf, size_t size, size_t nmembs) | |
340 | { | |
341 | struct inode *inode; | |
342 | struct nilfs_vdesc *vdesc; | |
343 | struct buffer_head *bh, *n; | |
344 | LIST_HEAD(buffers); | |
345 | ino_t ino; | |
346 | __u64 cno; | |
347 | int i, ret; | |
348 | ||
349 | for (i = 0, vdesc = buf; i < nmembs; ) { | |
350 | ino = vdesc->vd_ino; | |
351 | cno = vdesc->vd_cno; | |
352 | inode = nilfs_gc_iget(nilfs, ino, cno); | |
353 | if (unlikely(inode == NULL)) { | |
354 | ret = -ENOMEM; | |
355 | goto failed; | |
356 | } | |
357 | do { | |
358 | ret = nilfs_ioctl_move_inode_block(inode, vdesc, | |
359 | &buffers); | |
360 | if (unlikely(ret < 0)) | |
361 | goto failed; | |
362 | vdesc++; | |
363 | } while (++i < nmembs && | |
364 | vdesc->vd_ino == ino && vdesc->vd_cno == cno); | |
365 | } | |
366 | ||
367 | list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) { | |
368 | ret = nilfs_gccache_wait_and_mark_dirty(bh); | |
369 | if (unlikely(ret < 0)) { | |
370 | if (ret == -EEXIST) { | |
371 | vdesc = bh->b_private; | |
372 | printk(KERN_CRIT | |
373 | "%s: conflicting %s buffer: " | |
374 | "ino=%llu, cno=%llu, offset=%llu, " | |
375 | "blocknr=%llu, vblocknr=%llu\n", | |
376 | __func__, | |
377 | vdesc->vd_flags ? "node" : "data", | |
378 | (unsigned long long)vdesc->vd_ino, | |
379 | (unsigned long long)vdesc->vd_cno, | |
380 | (unsigned long long)vdesc->vd_offset, | |
381 | (unsigned long long)vdesc->vd_blocknr, | |
382 | (unsigned long long)vdesc->vd_vblocknr); | |
383 | } | |
384 | goto failed; | |
385 | } | |
386 | list_del_init(&bh->b_assoc_buffers); | |
387 | bh->b_private = NULL; | |
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); | |
395 | bh->b_private = NULL; | |
396 | brelse(bh); | |
397 | } | |
398 | return ret; | |
399 | } | |
400 | ||
401 | static inline int nilfs_ioctl_move_blocks(struct the_nilfs *nilfs, | |
402 | struct nilfs_argv *argv, | |
403 | int dir) | |
404 | { | |
405 | return nilfs_ioctl_wrap_copy(nilfs, argv, dir, | |
406 | nilfs_ioctl_do_move_blocks); | |
407 | } | |
408 | ||
409 | static ssize_t | |
410 | nilfs_ioctl_do_delete_checkpoints(struct the_nilfs *nilfs, int index, | |
411 | int flags, void *buf, size_t size, | |
412 | size_t nmembs) | |
413 | { | |
414 | struct inode *cpfile = nilfs->ns_cpfile; | |
415 | struct nilfs_period *periods = buf; | |
416 | int ret, i; | |
417 | ||
418 | for (i = 0; i < nmembs; i++) { | |
419 | ret = nilfs_cpfile_delete_checkpoints( | |
420 | cpfile, periods[i].p_start, periods[i].p_end); | |
421 | if (ret < 0) | |
422 | return ret; | |
423 | } | |
424 | return nmembs; | |
425 | } | |
426 | ||
427 | static inline int nilfs_ioctl_delete_checkpoints(struct the_nilfs *nilfs, | |
428 | struct nilfs_argv *argv, | |
429 | int dir) | |
430 | { | |
431 | return nilfs_ioctl_wrap_copy(nilfs, argv, dir, | |
432 | nilfs_ioctl_do_delete_checkpoints); | |
433 | } | |
434 | ||
435 | static ssize_t | |
436 | nilfs_ioctl_do_free_vblocknrs(struct the_nilfs *nilfs, int index, int flags, | |
437 | void *buf, size_t size, size_t nmembs) | |
438 | { | |
439 | int ret = nilfs_dat_freev(nilfs_dat_inode(nilfs), buf, nmembs); | |
440 | ||
441 | return (ret < 0) ? ret : nmembs; | |
442 | } | |
443 | ||
444 | static inline int nilfs_ioctl_free_vblocknrs(struct the_nilfs *nilfs, | |
445 | struct nilfs_argv *argv, | |
446 | int dir) | |
447 | { | |
448 | return nilfs_ioctl_wrap_copy(nilfs, argv, dir, | |
449 | nilfs_ioctl_do_free_vblocknrs); | |
450 | } | |
451 | ||
452 | static ssize_t | |
453 | nilfs_ioctl_do_mark_blocks_dirty(struct the_nilfs *nilfs, int index, int flags, | |
454 | void *buf, size_t size, size_t nmembs) | |
455 | { | |
456 | struct inode *dat = nilfs_dat_inode(nilfs); | |
457 | struct nilfs_bmap *bmap = NILFS_I(dat)->i_bmap; | |
458 | struct nilfs_bdesc *bdescs = buf; | |
459 | int ret, i; | |
460 | ||
461 | for (i = 0; i < nmembs; i++) { | |
462 | /* XXX: use macro or inline func to check liveness */ | |
463 | ret = nilfs_bmap_lookup_at_level(bmap, | |
464 | bdescs[i].bd_offset, | |
465 | bdescs[i].bd_level + 1, | |
466 | &bdescs[i].bd_blocknr); | |
467 | if (ret < 0) { | |
468 | if (ret != -ENOENT) | |
469 | return ret; | |
470 | bdescs[i].bd_blocknr = 0; | |
471 | } | |
472 | if (bdescs[i].bd_blocknr != bdescs[i].bd_oblocknr) | |
473 | /* skip dead block */ | |
474 | continue; | |
475 | if (bdescs[i].bd_level == 0) { | |
476 | ret = nilfs_mdt_mark_block_dirty(dat, | |
477 | bdescs[i].bd_offset); | |
478 | if (ret < 0) { | |
479 | BUG_ON(ret == -ENOENT); | |
480 | return ret; | |
481 | } | |
482 | } else { | |
483 | ret = nilfs_bmap_mark(bmap, bdescs[i].bd_offset, | |
484 | bdescs[i].bd_level); | |
485 | if (ret < 0) { | |
486 | BUG_ON(ret == -ENOENT); | |
487 | return ret; | |
488 | } | |
489 | } | |
490 | } | |
491 | return nmembs; | |
492 | } | |
493 | ||
494 | static inline int nilfs_ioctl_mark_blocks_dirty(struct the_nilfs *nilfs, | |
495 | struct nilfs_argv *argv, | |
496 | int dir) | |
497 | { | |
498 | return nilfs_ioctl_wrap_copy(nilfs, argv, dir, | |
499 | nilfs_ioctl_do_mark_blocks_dirty); | |
500 | } | |
501 | ||
502 | static ssize_t | |
503 | nilfs_ioctl_do_free_segments(struct the_nilfs *nilfs, int index, int flags, | |
504 | void *buf, size_t size, size_t nmembs) | |
505 | { | |
506 | struct nilfs_sb_info *sbi = nilfs_get_writer(nilfs); | |
507 | int ret; | |
508 | ||
509 | BUG_ON(!sbi); | |
510 | ret = nilfs_segctor_add_segments_to_be_freed( | |
511 | NILFS_SC(sbi), buf, nmembs); | |
512 | nilfs_put_writer(nilfs); | |
513 | ||
514 | return (ret < 0) ? ret : nmembs; | |
515 | } | |
516 | ||
517 | static inline int nilfs_ioctl_free_segments(struct the_nilfs *nilfs, | |
518 | struct nilfs_argv *argv, | |
519 | int dir) | |
520 | { | |
521 | return nilfs_ioctl_wrap_copy(nilfs, argv, dir, | |
522 | nilfs_ioctl_do_free_segments); | |
523 | } | |
524 | ||
525 | int nilfs_ioctl_prepare_clean_segments(struct the_nilfs *nilfs, | |
526 | void __user *argp) | |
527 | { | |
528 | struct nilfs_argv argv[5]; | |
529 | int dir, ret; | |
530 | ||
531 | if (copy_from_user(argv, argp, sizeof(argv))) | |
532 | return -EFAULT; | |
533 | ||
534 | dir = _IOC_WRITE; | |
535 | ret = nilfs_ioctl_move_blocks(nilfs, &argv[0], dir); | |
536 | if (ret < 0) | |
537 | goto out_move_blks; | |
538 | ret = nilfs_ioctl_delete_checkpoints(nilfs, &argv[1], dir); | |
539 | if (ret < 0) | |
540 | goto out_del_cps; | |
541 | ret = nilfs_ioctl_free_vblocknrs(nilfs, &argv[2], dir); | |
542 | if (ret < 0) | |
543 | goto out_free_vbns; | |
544 | ret = nilfs_ioctl_mark_blocks_dirty(nilfs, &argv[3], dir); | |
545 | if (ret < 0) | |
546 | goto out_free_vbns; | |
547 | ret = nilfs_ioctl_free_segments(nilfs, &argv[4], dir); | |
548 | if (ret < 0) | |
549 | goto out_free_segs; | |
550 | ||
551 | return 0; | |
552 | ||
553 | out_free_segs: | |
554 | BUG(); /* XXX: not implemented yet */ | |
555 | out_free_vbns: | |
556 | BUG();/* XXX: not implemented yet */ | |
557 | out_del_cps: | |
558 | BUG();/* XXX: not implemented yet */ | |
559 | out_move_blks: | |
560 | nilfs_remove_all_gcinode(nilfs); | |
561 | return ret; | |
562 | } | |
563 | ||
564 | static int nilfs_ioctl_clean_segments(struct inode *inode, struct file *filp, | |
565 | unsigned int cmd, void __user *argp) | |
566 | { | |
567 | int ret; | |
568 | ||
569 | if (!capable(CAP_SYS_ADMIN)) | |
570 | return -EPERM; | |
571 | ||
572 | ret = nilfs_clean_segments(inode->i_sb, argp); | |
573 | clear_nilfs_cond_nongc_write(NILFS_SB(inode->i_sb)->s_nilfs); | |
574 | return ret; | |
575 | } | |
576 | ||
577 | static int nilfs_ioctl_test_cond(struct the_nilfs *nilfs, int cond) | |
578 | { | |
579 | return (cond & NILFS_TIMEDWAIT_SEG_WRITE) && | |
580 | nilfs_cond_nongc_write(nilfs); | |
581 | } | |
582 | ||
583 | static void nilfs_ioctl_clear_cond(struct the_nilfs *nilfs, int cond) | |
584 | { | |
585 | if (cond & NILFS_TIMEDWAIT_SEG_WRITE) | |
586 | clear_nilfs_cond_nongc_write(nilfs); | |
587 | } | |
588 | ||
589 | static int nilfs_ioctl_timedwait(struct inode *inode, struct file *filp, | |
590 | unsigned int cmd, void __user *argp) | |
591 | { | |
592 | struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs; | |
593 | struct nilfs_wait_cond wc; | |
594 | long ret; | |
595 | ||
596 | if (!capable(CAP_SYS_ADMIN)) | |
597 | return -EPERM; | |
598 | if (copy_from_user(&wc, argp, sizeof(wc))) | |
599 | return -EFAULT; | |
600 | ||
601 | unlock_kernel(); | |
602 | ret = wc.wc_flags ? | |
603 | wait_event_interruptible_timeout( | |
604 | nilfs->ns_cleanerd_wq, | |
605 | nilfs_ioctl_test_cond(nilfs, wc.wc_cond), | |
606 | timespec_to_jiffies(&wc.wc_timeout)) : | |
607 | wait_event_interruptible( | |
608 | nilfs->ns_cleanerd_wq, | |
609 | nilfs_ioctl_test_cond(nilfs, wc.wc_cond)); | |
610 | lock_kernel(); | |
611 | nilfs_ioctl_clear_cond(nilfs, wc.wc_cond); | |
612 | ||
613 | if (ret > 0) { | |
614 | jiffies_to_timespec(ret, &wc.wc_timeout); | |
615 | if (copy_to_user(argp, &wc, sizeof(wc))) | |
616 | return -EFAULT; | |
617 | return 0; | |
618 | } | |
619 | if (ret != 0) | |
620 | return -EINTR; | |
621 | ||
622 | return wc.wc_flags ? -ETIME : 0; | |
623 | } | |
624 | ||
625 | static int nilfs_ioctl_sync(struct inode *inode, struct file *filp, | |
626 | unsigned int cmd, void __user *argp) | |
627 | { | |
628 | __u64 cno; | |
629 | int ret; | |
630 | ||
631 | ret = nilfs_construct_segment(inode->i_sb); | |
632 | if (ret < 0) | |
633 | return ret; | |
634 | ||
635 | if (argp != NULL) { | |
636 | cno = NILFS_SB(inode->i_sb)->s_nilfs->ns_cno - 1; | |
637 | if (copy_to_user(argp, &cno, sizeof(cno))) | |
638 | return -EFAULT; | |
639 | } | |
640 | return 0; | |
641 | } | |
642 | ||
643 | int nilfs_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, | |
644 | unsigned long arg) | |
645 | { | |
646 | void __user *argp = (void * __user *)arg; | |
647 | ||
648 | switch (cmd) { | |
649 | case NILFS_IOCTL_CHANGE_CPMODE: | |
650 | return nilfs_ioctl_change_cpmode(inode, filp, cmd, argp); | |
651 | case NILFS_IOCTL_DELETE_CHECKPOINT: | |
652 | return nilfs_ioctl_delete_checkpoint(inode, filp, cmd, argp); | |
653 | case NILFS_IOCTL_GET_CPINFO: | |
654 | return nilfs_ioctl_get_cpinfo(inode, filp, cmd, argp); | |
655 | case NILFS_IOCTL_GET_CPSTAT: | |
656 | return nilfs_ioctl_get_cpstat(inode, filp, cmd, argp); | |
657 | case NILFS_IOCTL_GET_SUINFO: | |
658 | return nilfs_ioctl_get_suinfo(inode, filp, cmd, argp); | |
659 | case NILFS_IOCTL_GET_SUSTAT: | |
660 | return nilfs_ioctl_get_sustat(inode, filp, cmd, argp); | |
661 | case NILFS_IOCTL_GET_VINFO: | |
662 | /* XXX: rename to ??? */ | |
663 | return nilfs_ioctl_get_vinfo(inode, filp, cmd, argp); | |
664 | case NILFS_IOCTL_GET_BDESCS: | |
665 | return nilfs_ioctl_get_bdescs(inode, filp, cmd, argp); | |
666 | case NILFS_IOCTL_CLEAN_SEGMENTS: | |
667 | return nilfs_ioctl_clean_segments(inode, filp, cmd, argp); | |
668 | case NILFS_IOCTL_TIMEDWAIT: | |
669 | return nilfs_ioctl_timedwait(inode, filp, cmd, argp); | |
670 | case NILFS_IOCTL_SYNC: | |
671 | return nilfs_ioctl_sync(inode, filp, cmd, argp); | |
672 | default: | |
673 | return -ENOTTY; | |
674 | } | |
675 | } | |
676 | ||
677 | /* compat_ioctl */ | |
678 | #ifdef CONFIG_COMPAT | |
679 | #include <linux/compat.h> | |
680 | ||
681 | static int nilfs_compat_locked_ioctl(struct inode *inode, struct file *filp, | |
682 | unsigned int cmd, unsigned long arg) | |
683 | { | |
684 | int ret; | |
685 | ||
686 | lock_kernel(); | |
687 | ret = nilfs_ioctl(inode, filp, cmd, arg); | |
688 | unlock_kernel(); | |
689 | return ret; | |
690 | } | |
691 | ||
692 | static int | |
693 | nilfs_compat_ioctl_uargv32_to_uargv(struct nilfs_argv32 __user *uargv32, | |
694 | struct nilfs_argv __user *uargv) | |
695 | { | |
696 | compat_uptr_t base; | |
697 | compat_size_t nmembs, size; | |
698 | compat_int_t index, flags; | |
699 | ||
700 | if (get_user(base, &uargv32->v_base) || | |
701 | put_user(compat_ptr(base), &uargv->v_base) || | |
702 | get_user(nmembs, &uargv32->v_nmembs) || | |
703 | put_user(nmembs, &uargv->v_nmembs) || | |
704 | get_user(size, &uargv32->v_size) || | |
705 | put_user(size, &uargv->v_size) || | |
706 | get_user(index, &uargv32->v_index) || | |
707 | put_user(index, &uargv->v_index) || | |
708 | get_user(flags, &uargv32->v_flags) || | |
709 | put_user(flags, &uargv->v_flags)) | |
710 | return -EFAULT; | |
711 | return 0; | |
712 | } | |
713 | ||
714 | static int | |
715 | nilfs_compat_ioctl_uargv_to_uargv32(struct nilfs_argv __user *uargv, | |
716 | struct nilfs_argv32 __user *uargv32) | |
717 | { | |
718 | size_t nmembs; | |
719 | ||
720 | if (get_user(nmembs, &uargv->v_nmembs) || | |
721 | put_user(nmembs, &uargv32->v_nmembs)) | |
722 | return -EFAULT; | |
723 | return 0; | |
724 | } | |
725 | ||
726 | static int | |
727 | nilfs_compat_ioctl_get_by_argv(struct inode *inode, struct file *filp, | |
728 | unsigned int cmd, unsigned long arg) | |
729 | { | |
730 | struct nilfs_argv __user *uargv; | |
731 | struct nilfs_argv32 __user *uargv32; | |
732 | int ret; | |
733 | ||
734 | uargv = compat_alloc_user_space(sizeof(struct nilfs_argv)); | |
735 | uargv32 = compat_ptr(arg); | |
736 | ret = nilfs_compat_ioctl_uargv32_to_uargv(uargv32, uargv); | |
737 | if (ret < 0) | |
738 | return ret; | |
739 | ||
740 | ret = nilfs_compat_locked_ioctl(inode, filp, cmd, (unsigned long)uargv); | |
741 | if (ret < 0) | |
742 | return ret; | |
743 | ||
744 | return nilfs_compat_ioctl_uargv_to_uargv32(uargv, uargv32); | |
745 | } | |
746 | ||
747 | static int | |
748 | nilfs_compat_ioctl_change_cpmode(struct inode *inode, struct file *filp, | |
749 | unsigned int cmd, unsigned long arg) | |
750 | { | |
751 | struct nilfs_cpmode __user *ucpmode; | |
752 | struct nilfs_cpmode32 __user *ucpmode32; | |
753 | int mode; | |
754 | ||
755 | ucpmode = compat_alloc_user_space(sizeof(struct nilfs_cpmode)); | |
756 | ucpmode32 = compat_ptr(arg); | |
757 | if (copy_in_user(&ucpmode->cm_cno, &ucpmode32->cm_cno, | |
758 | sizeof(__u64)) || | |
759 | get_user(mode, &ucpmode32->cm_mode) || | |
760 | put_user(mode, &ucpmode->cm_mode)) | |
761 | return -EFAULT; | |
762 | ||
763 | return nilfs_compat_locked_ioctl( | |
764 | inode, filp, cmd, (unsigned long)ucpmode); | |
765 | } | |
766 | ||
767 | ||
768 | static inline int | |
769 | nilfs_compat_ioctl_delete_checkpoint(struct inode *inode, struct file *filp, | |
770 | unsigned int cmd, unsigned long arg) | |
771 | { | |
772 | return nilfs_compat_locked_ioctl(inode, filp, cmd, arg); | |
773 | } | |
774 | ||
775 | static inline int | |
776 | nilfs_compat_ioctl_get_cpinfo(struct inode *inode, struct file *filp, | |
777 | unsigned int cmd, unsigned long arg) | |
778 | { | |
779 | return nilfs_compat_ioctl_get_by_argv(inode, filp, cmd, arg); | |
780 | } | |
781 | ||
782 | static inline int | |
783 | nilfs_compat_ioctl_get_cpstat(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_suinfo(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 int | |
797 | nilfs_compat_ioctl_get_sustat(struct inode *inode, struct file *filp, | |
798 | unsigned int cmd, unsigned long arg) | |
799 | { | |
800 | struct nilfs_sustat __user *usustat; | |
801 | struct nilfs_sustat32 __user *usustat32; | |
802 | time_t ctime, nongc_ctime; | |
803 | int ret; | |
804 | ||
805 | usustat = compat_alloc_user_space(sizeof(struct nilfs_sustat)); | |
806 | ret = nilfs_compat_locked_ioctl(inode, filp, cmd, | |
807 | (unsigned long)usustat); | |
808 | if (ret < 0) | |
809 | return ret; | |
810 | ||
811 | usustat32 = compat_ptr(arg); | |
812 | if (copy_in_user(&usustat32->ss_nsegs, &usustat->ss_nsegs, | |
813 | sizeof(__u64)) || | |
814 | copy_in_user(&usustat32->ss_ncleansegs, &usustat->ss_ncleansegs, | |
815 | sizeof(__u64)) || | |
816 | copy_in_user(&usustat32->ss_ndirtysegs, &usustat->ss_ndirtysegs, | |
817 | sizeof(__u64)) || | |
818 | get_user(ctime, &usustat->ss_ctime) || | |
819 | put_user(ctime, &usustat32->ss_ctime) || | |
820 | get_user(nongc_ctime, &usustat->ss_nongc_ctime) || | |
821 | put_user(nongc_ctime, &usustat32->ss_nongc_ctime)) | |
822 | return -EFAULT; | |
823 | return 0; | |
824 | } | |
825 | ||
826 | static inline int | |
827 | nilfs_compat_ioctl_get_vinfo(struct inode *inode, struct file *filp, | |
828 | unsigned int cmd, unsigned long arg) | |
829 | { | |
830 | return nilfs_compat_ioctl_get_by_argv(inode, filp, cmd, arg); | |
831 | } | |
832 | ||
833 | static inline int | |
834 | nilfs_compat_ioctl_get_bdescs(struct inode *inode, struct file *filp, | |
835 | unsigned int cmd, unsigned long arg) | |
836 | { | |
837 | return nilfs_compat_ioctl_get_by_argv(inode, filp, cmd, arg); | |
838 | } | |
839 | ||
840 | static int | |
841 | nilfs_compat_ioctl_clean_segments(struct inode *inode, struct file *filp, | |
842 | unsigned int cmd, unsigned long arg) | |
843 | { | |
844 | struct nilfs_argv __user *uargv; | |
845 | struct nilfs_argv32 __user *uargv32; | |
846 | int i, ret; | |
847 | ||
848 | uargv = compat_alloc_user_space(sizeof(struct nilfs_argv) * 5); | |
849 | uargv32 = compat_ptr(arg); | |
850 | for (i = 0; i < 5; i++) { | |
851 | ret = nilfs_compat_ioctl_uargv32_to_uargv(&uargv32[i], | |
852 | &uargv[i]); | |
853 | if (ret < 0) | |
854 | return ret; | |
855 | } | |
856 | return nilfs_compat_locked_ioctl( | |
857 | inode, filp, cmd, (unsigned long)uargv); | |
858 | } | |
859 | ||
860 | static int | |
861 | nilfs_compat_ioctl_timedwait(struct inode *inode, struct file *filp, | |
862 | unsigned int cmd, unsigned long arg) | |
863 | { | |
864 | struct nilfs_wait_cond __user *uwcond; | |
865 | struct nilfs_wait_cond32 __user *uwcond32; | |
866 | struct timespec ts; | |
867 | int cond, flags, ret; | |
868 | ||
869 | uwcond = compat_alloc_user_space(sizeof(struct nilfs_wait_cond)); | |
870 | uwcond32 = compat_ptr(arg); | |
871 | if (get_user(cond, &uwcond32->wc_cond) || | |
872 | put_user(cond, &uwcond->wc_cond) || | |
873 | get_user(flags, &uwcond32->wc_flags) || | |
874 | put_user(flags, &uwcond->wc_flags) || | |
875 | get_user(ts.tv_sec, &uwcond32->wc_timeout.tv_sec) || | |
876 | get_user(ts.tv_nsec, &uwcond32->wc_timeout.tv_nsec) || | |
877 | put_user(ts.tv_sec, &uwcond->wc_timeout.tv_sec) || | |
878 | put_user(ts.tv_nsec, &uwcond->wc_timeout.tv_nsec)) | |
879 | return -EFAULT; | |
880 | ||
881 | ret = nilfs_compat_locked_ioctl(inode, filp, cmd, | |
882 | (unsigned long)uwcond); | |
883 | if (ret < 0) | |
884 | return ret; | |
885 | ||
886 | if (get_user(ts.tv_sec, &uwcond->wc_timeout.tv_sec) || | |
887 | get_user(ts.tv_nsec, &uwcond->wc_timeout.tv_nsec) || | |
888 | put_user(ts.tv_sec, &uwcond32->wc_timeout.tv_sec) || | |
889 | put_user(ts.tv_nsec, &uwcond32->wc_timeout.tv_nsec)) | |
890 | return -EFAULT; | |
891 | ||
892 | return 0; | |
893 | } | |
894 | ||
895 | static int nilfs_compat_ioctl_sync(struct inode *inode, struct file *filp, | |
896 | unsigned int cmd, unsigned long arg) | |
897 | { | |
898 | return nilfs_compat_locked_ioctl(inode, filp, cmd, arg); | |
899 | } | |
900 | ||
901 | long nilfs_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) | |
902 | { | |
903 | struct inode *inode = filp->f_dentry->d_inode; | |
904 | ||
905 | switch (cmd) { | |
906 | case NILFS_IOCTL32_CHANGE_CPMODE: | |
907 | return nilfs_compat_ioctl_change_cpmode( | |
908 | inode, filp, NILFS_IOCTL_CHANGE_CPMODE, arg); | |
909 | case NILFS_IOCTL_DELETE_CHECKPOINT: | |
910 | return nilfs_compat_ioctl_delete_checkpoint( | |
911 | inode, filp, cmd, arg); | |
912 | case NILFS_IOCTL32_GET_CPINFO: | |
913 | return nilfs_compat_ioctl_get_cpinfo( | |
914 | inode, filp, NILFS_IOCTL_GET_CPINFO, arg); | |
915 | case NILFS_IOCTL_GET_CPSTAT: | |
916 | return nilfs_compat_ioctl_get_cpstat(inode, filp, cmd, arg); | |
917 | case NILFS_IOCTL32_GET_SUINFO: | |
918 | return nilfs_compat_ioctl_get_suinfo( | |
919 | inode, filp, NILFS_IOCTL_GET_SUINFO, arg); | |
920 | case NILFS_IOCTL32_GET_SUSTAT: | |
921 | return nilfs_compat_ioctl_get_sustat( | |
922 | inode, filp, NILFS_IOCTL_GET_SUSTAT, arg); | |
923 | case NILFS_IOCTL32_GET_VINFO: | |
924 | return nilfs_compat_ioctl_get_vinfo( | |
925 | inode, filp, NILFS_IOCTL_GET_VINFO, arg); | |
926 | case NILFS_IOCTL32_GET_BDESCS: | |
927 | return nilfs_compat_ioctl_get_bdescs( | |
928 | inode, filp, NILFS_IOCTL_GET_BDESCS, arg); | |
929 | case NILFS_IOCTL32_CLEAN_SEGMENTS: | |
930 | return nilfs_compat_ioctl_clean_segments( | |
931 | inode, filp, NILFS_IOCTL_CLEAN_SEGMENTS, arg); | |
932 | case NILFS_IOCTL32_TIMEDWAIT: | |
933 | return nilfs_compat_ioctl_timedwait( | |
934 | inode, filp, NILFS_IOCTL_TIMEDWAIT, arg); | |
935 | case NILFS_IOCTL_SYNC: | |
936 | return nilfs_compat_ioctl_sync(inode, filp, cmd, arg); | |
937 | default: | |
938 | return -ENOIOCTLCMD; | |
939 | } | |
940 | } | |
941 | #endif |