blob: b185e937a335471ec224314909a959684f56d174 [file] [log] [blame]
Koji Sato7942b912009-04-06 19:01:41 -07001/*
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>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090025#include <linux/slab.h>
Koji Sato7942b912009-04-06 19:01:41 -070026#include <linux/capability.h> /* capable() */
27#include <linux/uaccess.h> /* copy_from_user(), copy_to_user() */
Ryusuke Konishi4f6b8282009-05-10 22:41:43 +090028#include <linux/vmalloc.h>
Ryusuke Konishi75124872010-01-26 13:59:40 +090029#include <linux/mount.h> /* mnt_want_write(), mnt_drop_write() */
Koji Sato7942b912009-04-06 19:01:41 -070030#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
Koji Sato7942b912009-04-06 19:01:41 -070039static int nilfs_ioctl_wrap_copy(struct the_nilfs *nilfs,
40 struct nilfs_argv *argv, int dir,
41 ssize_t (*dofunc)(struct the_nilfs *,
Ryusuke Konishib028fcf2009-04-06 19:01:47 -070042 __u64 *, int,
Koji Sato7942b912009-04-06 19:01:41 -070043 void *, size_t, size_t))
44{
45 void *buf;
Ryusuke Konishidc498d02009-04-06 19:01:52 -070046 void __user *base = (void __user *)(unsigned long)argv->v_base;
Ryusuke Konishi3358b4a2009-04-06 19:01:43 -070047 size_t maxmembs, total, n;
Koji Sato7942b912009-04-06 19:01:41 -070048 ssize_t nr;
49 int ret, i;
Ryusuke Konishib028fcf2009-04-06 19:01:47 -070050 __u64 pos, ppos;
Koji Sato7942b912009-04-06 19:01:41 -070051
52 if (argv->v_nmembs == 0)
53 return 0;
54
Ryusuke Konishi3358b4a2009-04-06 19:01:43 -070055 if (argv->v_size > PAGE_SIZE)
56 return -EINVAL;
57
58 buf = (void *)__get_free_pages(GFP_NOFS, 0);
59 if (unlikely(!buf))
Koji Sato7942b912009-04-06 19:01:41 -070060 return -ENOMEM;
Ryusuke Konishi3358b4a2009-04-06 19:01:43 -070061 maxmembs = PAGE_SIZE / argv->v_size;
Koji Sato7942b912009-04-06 19:01:41 -070062
63 ret = 0;
64 total = 0;
Ryusuke Konishib028fcf2009-04-06 19:01:47 -070065 pos = argv->v_index;
Koji Sato7942b912009-04-06 19:01:41 -070066 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) &&
Ryusuke Konishidc498d02009-04-06 19:01:52 -070070 copy_from_user(buf, base + argv->v_size * i,
71 argv->v_size * n)) {
Koji Sato7942b912009-04-06 19:01:41 -070072 ret = -EFAULT;
73 break;
74 }
Ryusuke Konishib028fcf2009-04-06 19:01:47 -070075 ppos = pos;
Pekka Enberg8acfbf02009-04-06 19:01:49 -070076 nr = dofunc(nilfs, &pos, argv->v_flags, buf, argv->v_size,
Ryusuke Konishib028fcf2009-04-06 19:01:47 -070077 n);
Koji Sato7942b912009-04-06 19:01:41 -070078 if (nr < 0) {
79 ret = nr;
80 break;
81 }
82 if ((dir & _IOC_READ) &&
Ryusuke Konishidc498d02009-04-06 19:01:52 -070083 copy_to_user(base + argv->v_size * i, buf,
84 argv->v_size * nr)) {
Koji Sato7942b912009-04-06 19:01:41 -070085 ret = -EFAULT;
86 break;
87 }
88 total += nr;
Ryusuke Konishib028fcf2009-04-06 19:01:47 -070089 if ((size_t)nr < n)
90 break;
91 if (pos == ppos)
92 pos += n;
Koji Sato7942b912009-04-06 19:01:41 -070093 }
94 argv->v_nmembs = total;
95
Ryusuke Konishi3358b4a2009-04-06 19:01:43 -070096 free_pages((unsigned long)buf, 0);
Koji Sato7942b912009-04-06 19:01:41 -070097 return ret;
98}
99
100static int nilfs_ioctl_change_cpmode(struct inode *inode, struct file *filp,
101 unsigned int cmd, void __user *argp)
102{
Ryusuke Konishic1ea9852009-11-12 00:13:32 +0900103 struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
104 struct inode *cpfile = nilfs->ns_cpfile;
Koji Sato7942b912009-04-06 19:01:41 -0700105 struct nilfs_transaction_info ti;
106 struct nilfs_cpmode cpmode;
107 int ret;
108
109 if (!capable(CAP_SYS_ADMIN))
110 return -EPERM;
Ryusuke Konishi75124872010-01-26 13:59:40 +0900111
112 ret = mnt_want_write(filp->f_path.mnt);
113 if (ret)
114 return ret;
115
116 ret = -EFAULT;
Koji Sato7942b912009-04-06 19:01:41 -0700117 if (copy_from_user(&cpmode, argp, sizeof(cpmode)))
Ryusuke Konishi75124872010-01-26 13:59:40 +0900118 goto out;
Koji Sato7942b912009-04-06 19:01:41 -0700119
Ryusuke Konishi348fe8d2010-09-09 02:07:56 +0900120 down_read(&inode->i_sb->s_umount);
Ryusuke Konishi75124872010-01-26 13:59:40 +0900121
Koji Sato7942b912009-04-06 19:01:41 -0700122 nilfs_transaction_begin(inode->i_sb, &ti, 0);
123 ret = nilfs_cpfile_change_cpmode(
124 cpfile, cpmode.cm_cno, cpmode.cm_mode);
Ryusuke Konishi75124872010-01-26 13:59:40 +0900125 if (unlikely(ret < 0))
Ryusuke Konishi47420c72009-04-06 19:01:45 -0700126 nilfs_transaction_abort(inode->i_sb);
Ryusuke Konishi75124872010-01-26 13:59:40 +0900127 else
128 nilfs_transaction_commit(inode->i_sb); /* never fails */
129
Ryusuke Konishi348fe8d2010-09-09 02:07:56 +0900130 up_read(&inode->i_sb->s_umount);
Ryusuke Konishi75124872010-01-26 13:59:40 +0900131out:
132 mnt_drop_write(filp->f_path.mnt);
Koji Sato7942b912009-04-06 19:01:41 -0700133 return ret;
134}
135
136static int
137nilfs_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;
Ryusuke Konishi75124872010-01-26 13:59:40 +0900147
148 ret = mnt_want_write(filp->f_path.mnt);
149 if (ret)
150 return ret;
151
152 ret = -EFAULT;
Koji Sato7942b912009-04-06 19:01:41 -0700153 if (copy_from_user(&cno, argp, sizeof(cno)))
Ryusuke Konishi75124872010-01-26 13:59:40 +0900154 goto out;
Koji Sato7942b912009-04-06 19:01:41 -0700155
156 nilfs_transaction_begin(inode->i_sb, &ti, 0);
157 ret = nilfs_cpfile_delete_checkpoint(cpfile, cno);
Ryusuke Konishi75124872010-01-26 13:59:40 +0900158 if (unlikely(ret < 0))
Ryusuke Konishi47420c72009-04-06 19:01:45 -0700159 nilfs_transaction_abort(inode->i_sb);
Ryusuke Konishi75124872010-01-26 13:59:40 +0900160 else
161 nilfs_transaction_commit(inode->i_sb); /* never fails */
162out:
163 mnt_drop_write(filp->f_path.mnt);
Koji Sato7942b912009-04-06 19:01:41 -0700164 return ret;
165}
166
167static ssize_t
Ryusuke Konishib028fcf2009-04-06 19:01:47 -0700168nilfs_ioctl_do_get_cpinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
Koji Sato7942b912009-04-06 19:01:41 -0700169 void *buf, size_t size, size_t nmembs)
170{
Koji Sato7942b912009-04-06 19:01:41 -0700171 int ret;
172
Ryusuke Konishi47420c72009-04-06 19:01:45 -0700173 down_read(&nilfs->ns_segctor_sem);
Ryusuke Konishi47eb6b92009-04-30 02:21:00 +0900174 ret = nilfs_cpfile_get_cpinfo(nilfs->ns_cpfile, posp, flags, buf,
Ryusuke Konishi003ff182009-05-12 03:58:47 +0900175 size, nmembs);
Ryusuke Konishi47420c72009-04-06 19:01:45 -0700176 up_read(&nilfs->ns_segctor_sem);
Koji Sato7942b912009-04-06 19:01:41 -0700177 return ret;
178}
179
180static int nilfs_ioctl_get_cpstat(struct inode *inode, struct file *filp,
181 unsigned int cmd, void __user *argp)
182{
Ryusuke Konishi47420c72009-04-06 19:01:45 -0700183 struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
Koji Sato7942b912009-04-06 19:01:41 -0700184 struct nilfs_cpstat cpstat;
Koji Sato7942b912009-04-06 19:01:41 -0700185 int ret;
186
Ryusuke Konishi47420c72009-04-06 19:01:45 -0700187 down_read(&nilfs->ns_segctor_sem);
188 ret = nilfs_cpfile_get_stat(nilfs->ns_cpfile, &cpstat);
189 up_read(&nilfs->ns_segctor_sem);
Koji Sato7942b912009-04-06 19:01:41 -0700190 if (ret < 0)
191 return ret;
192
193 if (copy_to_user(argp, &cpstat, sizeof(cpstat)))
194 ret = -EFAULT;
195 return ret;
196}
197
198static ssize_t
Ryusuke Konishib028fcf2009-04-06 19:01:47 -0700199nilfs_ioctl_do_get_suinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
Koji Sato7942b912009-04-06 19:01:41 -0700200 void *buf, size_t size, size_t nmembs)
201{
Koji Sato7942b912009-04-06 19:01:41 -0700202 int ret;
203
Ryusuke Konishi47420c72009-04-06 19:01:45 -0700204 down_read(&nilfs->ns_segctor_sem);
Ryusuke Konishi003ff182009-05-12 03:58:47 +0900205 ret = nilfs_sufile_get_suinfo(nilfs->ns_sufile, *posp, buf, size,
206 nmembs);
Ryusuke Konishi47420c72009-04-06 19:01:45 -0700207 up_read(&nilfs->ns_segctor_sem);
Koji Sato7942b912009-04-06 19:01:41 -0700208 return ret;
209}
210
211static int nilfs_ioctl_get_sustat(struct inode *inode, struct file *filp,
212 unsigned int cmd, void __user *argp)
213{
Ryusuke Konishi47420c72009-04-06 19:01:45 -0700214 struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
Koji Sato7942b912009-04-06 19:01:41 -0700215 struct nilfs_sustat sustat;
Koji Sato7942b912009-04-06 19:01:41 -0700216 int ret;
217
Ryusuke Konishi47420c72009-04-06 19:01:45 -0700218 down_read(&nilfs->ns_segctor_sem);
219 ret = nilfs_sufile_get_stat(nilfs->ns_sufile, &sustat);
220 up_read(&nilfs->ns_segctor_sem);
Koji Sato7942b912009-04-06 19:01:41 -0700221 if (ret < 0)
222 return ret;
223
224 if (copy_to_user(argp, &sustat, sizeof(sustat)))
225 ret = -EFAULT;
226 return ret;
227}
228
229static ssize_t
Ryusuke Konishib028fcf2009-04-06 19:01:47 -0700230nilfs_ioctl_do_get_vinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
Koji Sato7942b912009-04-06 19:01:41 -0700231 void *buf, size_t size, size_t nmembs)
232{
Koji Sato7942b912009-04-06 19:01:41 -0700233 int ret;
234
Ryusuke Konishi47420c72009-04-06 19:01:45 -0700235 down_read(&nilfs->ns_segctor_sem);
Ryusuke Konishi003ff182009-05-12 03:58:47 +0900236 ret = nilfs_dat_get_vinfo(nilfs_dat_inode(nilfs), buf, size, nmembs);
Ryusuke Konishi47420c72009-04-06 19:01:45 -0700237 up_read(&nilfs->ns_segctor_sem);
Koji Sato7942b912009-04-06 19:01:41 -0700238 return ret;
239}
240
241static ssize_t
Ryusuke Konishib028fcf2009-04-06 19:01:47 -0700242nilfs_ioctl_do_get_bdescs(struct the_nilfs *nilfs, __u64 *posp, int flags,
Koji Sato7942b912009-04-06 19:01:41 -0700243 void *buf, size_t size, size_t nmembs)
244{
245 struct inode *dat = nilfs_dat_inode(nilfs);
246 struct nilfs_bmap *bmap = NILFS_I(dat)->i_bmap;
247 struct nilfs_bdesc *bdescs = buf;
248 int ret, i;
249
Ryusuke Konishi47eb6b92009-04-30 02:21:00 +0900250 down_read(&nilfs->ns_segctor_sem);
Koji Sato7942b912009-04-06 19:01:41 -0700251 for (i = 0; i < nmembs; i++) {
252 ret = nilfs_bmap_lookup_at_level(bmap,
253 bdescs[i].bd_offset,
254 bdescs[i].bd_level + 1,
255 &bdescs[i].bd_blocknr);
256 if (ret < 0) {
Ryusuke Konishi47eb6b92009-04-30 02:21:00 +0900257 if (ret != -ENOENT) {
258 up_read(&nilfs->ns_segctor_sem);
Koji Sato7942b912009-04-06 19:01:41 -0700259 return ret;
Ryusuke Konishi47eb6b92009-04-30 02:21:00 +0900260 }
Koji Sato7942b912009-04-06 19:01:41 -0700261 bdescs[i].bd_blocknr = 0;
262 }
263 }
Ryusuke Konishi47eb6b92009-04-30 02:21:00 +0900264 up_read(&nilfs->ns_segctor_sem);
Koji Sato7942b912009-04-06 19:01:41 -0700265 return nmembs;
266}
267
268static int nilfs_ioctl_get_bdescs(struct inode *inode, struct file *filp,
269 unsigned int cmd, void __user *argp)
270{
271 struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
272 struct nilfs_argv argv;
Koji Sato7942b912009-04-06 19:01:41 -0700273 int ret;
274
275 if (copy_from_user(&argv, argp, sizeof(argv)))
276 return -EFAULT;
277
Ryusuke Konishi83aca8f2009-05-11 23:24:47 +0900278 if (argv.v_size != sizeof(struct nilfs_bdesc))
279 return -EINVAL;
280
Koji Sato7942b912009-04-06 19:01:41 -0700281 ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd),
282 nilfs_ioctl_do_get_bdescs);
Ryusuke Konishi47420c72009-04-06 19:01:45 -0700283 if (ret < 0)
284 return ret;
Koji Sato7942b912009-04-06 19:01:41 -0700285
286 if (copy_to_user(argp, &argv, sizeof(argv)))
287 ret = -EFAULT;
288 return ret;
289}
290
291static int nilfs_ioctl_move_inode_block(struct inode *inode,
292 struct nilfs_vdesc *vdesc,
293 struct list_head *buffers)
294{
295 struct buffer_head *bh;
296 int ret;
297
298 if (vdesc->vd_flags == 0)
299 ret = nilfs_gccache_submit_read_data(
300 inode, vdesc->vd_offset, vdesc->vd_blocknr,
301 vdesc->vd_vblocknr, &bh);
302 else
303 ret = nilfs_gccache_submit_read_node(
304 inode, vdesc->vd_blocknr, vdesc->vd_vblocknr, &bh);
305
306 if (unlikely(ret < 0)) {
307 if (ret == -ENOENT)
308 printk(KERN_CRIT
309 "%s: invalid virtual block address (%s): "
310 "ino=%llu, cno=%llu, offset=%llu, "
311 "blocknr=%llu, vblocknr=%llu\n",
312 __func__, vdesc->vd_flags ? "node" : "data",
313 (unsigned long long)vdesc->vd_ino,
314 (unsigned long long)vdesc->vd_cno,
315 (unsigned long long)vdesc->vd_offset,
316 (unsigned long long)vdesc->vd_blocknr,
317 (unsigned long long)vdesc->vd_vblocknr);
318 return ret;
319 }
Ryusuke Konishi5399dd12009-11-07 18:45:16 +0900320 if (unlikely(!list_empty(&bh->b_assoc_buffers))) {
321 printk(KERN_CRIT "%s: conflicting %s buffer: ino=%llu, "
322 "cno=%llu, offset=%llu, blocknr=%llu, vblocknr=%llu\n",
323 __func__, vdesc->vd_flags ? "node" : "data",
324 (unsigned long long)vdesc->vd_ino,
325 (unsigned long long)vdesc->vd_cno,
326 (unsigned long long)vdesc->vd_offset,
327 (unsigned long long)vdesc->vd_blocknr,
328 (unsigned long long)vdesc->vd_vblocknr);
329 brelse(bh);
330 return -EEXIST;
331 }
Koji Sato7942b912009-04-06 19:01:41 -0700332 list_add_tail(&bh->b_assoc_buffers, buffers);
333 return 0;
334}
335
Ryusuke Konishi263d90c2010-08-20 19:06:11 +0900336static int nilfs_ioctl_move_blocks(struct super_block *sb,
Ryusuke Konishi4f6b8282009-05-10 22:41:43 +0900337 struct nilfs_argv *argv, void *buf)
Koji Sato7942b912009-04-06 19:01:41 -0700338{
Ryusuke Konishi4f6b8282009-05-10 22:41:43 +0900339 size_t nmembs = argv->v_nmembs;
Ryusuke Konishi947b10a2010-12-16 09:57:57 +0900340 struct the_nilfs *nilfs = NILFS_SB(sb)->s_nilfs;
Koji Sato7942b912009-04-06 19:01:41 -0700341 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;
Ryusuke Konishi263d90c2010-08-20 19:06:11 +0900352 inode = nilfs_iget_for_gc(sb, ino, cno);
Dan Carpenter103cfcf2010-11-23 09:26:02 +0300353 if (IS_ERR(inode)) {
354 ret = PTR_ERR(inode);
Koji Sato7942b912009-04-06 19:01:41 -0700355 goto failed;
356 }
Ryusuke Konishi947b10a2010-12-16 09:57:57 +0900357 if (list_empty(&NILFS_I(inode)->i_dirty)) {
358 /*
359 * Add the inode to GC inode list. Garbage Collection
360 * is serialized and no two processes manipulate the
361 * list simultaneously.
362 */
363 igrab(inode);
364 list_add(&NILFS_I(inode)->i_dirty,
365 &nilfs->ns_gc_inodes);
366 }
367
Koji Sato7942b912009-04-06 19:01:41 -0700368 do {
369 ret = nilfs_ioctl_move_inode_block(inode, vdesc,
370 &buffers);
Ryusuke Konishi263d90c2010-08-20 19:06:11 +0900371 if (unlikely(ret < 0)) {
372 iput(inode);
Koji Sato7942b912009-04-06 19:01:41 -0700373 goto failed;
Ryusuke Konishi263d90c2010-08-20 19:06:11 +0900374 }
Koji Sato7942b912009-04-06 19:01:41 -0700375 vdesc++;
376 } while (++i < nmembs &&
377 vdesc->vd_ino == ino && vdesc->vd_cno == cno);
Ryusuke Konishi263d90c2010-08-20 19:06:11 +0900378
379 iput(inode); /* The inode still remains in GC inode list */
Koji Sato7942b912009-04-06 19:01:41 -0700380 }
381
382 list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) {
383 ret = nilfs_gccache_wait_and_mark_dirty(bh);
384 if (unlikely(ret < 0)) {
Ryusuke Konishi5399dd12009-11-07 18:45:16 +0900385 WARN_ON(ret == -EEXIST);
Koji Sato7942b912009-04-06 19:01:41 -0700386 goto failed;
387 }
388 list_del_init(&bh->b_assoc_buffers);
Koji Sato7942b912009-04-06 19:01:41 -0700389 brelse(bh);
390 }
391 return nmembs;
392
393 failed:
394 list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) {
395 list_del_init(&bh->b_assoc_buffers);
Koji Sato7942b912009-04-06 19:01:41 -0700396 brelse(bh);
397 }
398 return ret;
399}
400
Ryusuke Konishi4f6b8282009-05-10 22:41:43 +0900401static int nilfs_ioctl_delete_checkpoints(struct the_nilfs *nilfs,
402 struct nilfs_argv *argv, void *buf)
Koji Sato7942b912009-04-06 19:01:41 -0700403{
Ryusuke Konishi4f6b8282009-05-10 22:41:43 +0900404 size_t nmembs = argv->v_nmembs;
Koji Sato7942b912009-04-06 19:01:41 -0700405 struct inode *cpfile = nilfs->ns_cpfile;
406 struct nilfs_period *periods = buf;
407 int ret, i;
408
409 for (i = 0; i < nmembs; i++) {
410 ret = nilfs_cpfile_delete_checkpoints(
411 cpfile, periods[i].p_start, periods[i].p_end);
412 if (ret < 0)
413 return ret;
414 }
415 return nmembs;
416}
417
Ryusuke Konishi4f6b8282009-05-10 22:41:43 +0900418static int nilfs_ioctl_free_vblocknrs(struct the_nilfs *nilfs,
419 struct nilfs_argv *argv, void *buf)
Koji Sato7942b912009-04-06 19:01:41 -0700420{
Ryusuke Konishi4f6b8282009-05-10 22:41:43 +0900421 size_t nmembs = argv->v_nmembs;
422 int ret;
Koji Sato7942b912009-04-06 19:01:41 -0700423
Ryusuke Konishi4f6b8282009-05-10 22:41:43 +0900424 ret = nilfs_dat_freev(nilfs_dat_inode(nilfs), buf, nmembs);
Koji Sato7942b912009-04-06 19:01:41 -0700425
426 return (ret < 0) ? ret : nmembs;
427}
428
Ryusuke Konishi4f6b8282009-05-10 22:41:43 +0900429static int nilfs_ioctl_mark_blocks_dirty(struct the_nilfs *nilfs,
430 struct nilfs_argv *argv, void *buf)
Koji Sato7942b912009-04-06 19:01:41 -0700431{
Ryusuke Konishi4f6b8282009-05-10 22:41:43 +0900432 size_t nmembs = argv->v_nmembs;
Koji Sato7942b912009-04-06 19:01:41 -0700433 struct inode *dat = nilfs_dat_inode(nilfs);
434 struct nilfs_bmap *bmap = NILFS_I(dat)->i_bmap;
435 struct nilfs_bdesc *bdescs = buf;
436 int ret, i;
437
438 for (i = 0; i < nmembs; i++) {
439 /* XXX: use macro or inline func to check liveness */
440 ret = nilfs_bmap_lookup_at_level(bmap,
441 bdescs[i].bd_offset,
442 bdescs[i].bd_level + 1,
443 &bdescs[i].bd_blocknr);
444 if (ret < 0) {
445 if (ret != -ENOENT)
446 return ret;
447 bdescs[i].bd_blocknr = 0;
448 }
449 if (bdescs[i].bd_blocknr != bdescs[i].bd_oblocknr)
450 /* skip dead block */
451 continue;
452 if (bdescs[i].bd_level == 0) {
453 ret = nilfs_mdt_mark_block_dirty(dat,
454 bdescs[i].bd_offset);
455 if (ret < 0) {
Ryusuke Konishi1f5abe72009-04-06 19:01:55 -0700456 WARN_ON(ret == -ENOENT);
Koji Sato7942b912009-04-06 19:01:41 -0700457 return ret;
458 }
459 } else {
460 ret = nilfs_bmap_mark(bmap, bdescs[i].bd_offset,
461 bdescs[i].bd_level);
462 if (ret < 0) {
Ryusuke Konishi1f5abe72009-04-06 19:01:55 -0700463 WARN_ON(ret == -ENOENT);
Koji Sato7942b912009-04-06 19:01:41 -0700464 return ret;
465 }
466 }
467 }
468 return nmembs;
469}
470
Koji Sato7942b912009-04-06 19:01:41 -0700471int nilfs_ioctl_prepare_clean_segments(struct the_nilfs *nilfs,
Ryusuke Konishi4f6b8282009-05-10 22:41:43 +0900472 struct nilfs_argv *argv, void **kbufs)
Koji Sato7942b912009-04-06 19:01:41 -0700473{
Ryusuke Konishi1f5abe72009-04-06 19:01:55 -0700474 const char *msg;
Ryusuke Konishi4f6b8282009-05-10 22:41:43 +0900475 int ret;
Koji Sato7942b912009-04-06 19:01:41 -0700476
Ryusuke Konishi4f6b8282009-05-10 22:41:43 +0900477 ret = nilfs_ioctl_delete_checkpoints(nilfs, &argv[1], kbufs[1]);
Ryusuke Konishi1f5abe72009-04-06 19:01:55 -0700478 if (ret < 0) {
479 /*
480 * can safely abort because checkpoints can be removed
481 * independently.
482 */
483 msg = "cannot delete checkpoints";
484 goto failed;
485 }
Ryusuke Konishi4f6b8282009-05-10 22:41:43 +0900486 ret = nilfs_ioctl_free_vblocknrs(nilfs, &argv[2], kbufs[2]);
Ryusuke Konishi1f5abe72009-04-06 19:01:55 -0700487 if (ret < 0) {
488 /*
489 * can safely abort because DAT file is updated atomically
490 * using a copy-on-write technique.
491 */
492 msg = "cannot delete virtual blocks from DAT file";
493 goto failed;
494 }
Ryusuke Konishi4f6b8282009-05-10 22:41:43 +0900495 ret = nilfs_ioctl_mark_blocks_dirty(nilfs, &argv[3], kbufs[3]);
Ryusuke Konishi1f5abe72009-04-06 19:01:55 -0700496 if (ret < 0) {
497 /*
498 * can safely abort because the operation is nondestructive.
499 */
500 msg = "cannot mark copying blocks dirty";
501 goto failed;
502 }
Koji Sato7942b912009-04-06 19:01:41 -0700503 return 0;
504
Ryusuke Konishi1f5abe72009-04-06 19:01:55 -0700505 failed:
Ryusuke Konishi1f5abe72009-04-06 19:01:55 -0700506 printk(KERN_ERR "NILFS: GC failed during preparation: %s: err=%d\n",
507 msg, ret);
Koji Sato7942b912009-04-06 19:01:41 -0700508 return ret;
509}
510
511static int nilfs_ioctl_clean_segments(struct inode *inode, struct file *filp,
512 unsigned int cmd, void __user *argp)
513{
Ryusuke Konishi4f6b8282009-05-10 22:41:43 +0900514 struct nilfs_argv argv[5];
Tobias Klauser33e189b2009-12-23 13:57:47 +0100515 static const size_t argsz[5] = {
Ryusuke Konishi4f6b8282009-05-10 22:41:43 +0900516 sizeof(struct nilfs_vdesc),
517 sizeof(struct nilfs_period),
518 sizeof(__u64),
519 sizeof(struct nilfs_bdesc),
520 sizeof(__u64),
521 };
522 void __user *base;
523 void *kbufs[5];
524 struct the_nilfs *nilfs;
525 size_t len, nsegs;
526 int n, ret;
527
Koji Sato7942b912009-04-06 19:01:41 -0700528 if (!capable(CAP_SYS_ADMIN))
529 return -EPERM;
Ryusuke Konishi4f6b8282009-05-10 22:41:43 +0900530
Ryusuke Konishi75124872010-01-26 13:59:40 +0900531 ret = mnt_want_write(filp->f_path.mnt);
532 if (ret)
533 return ret;
Ryusuke Konishi4f6b8282009-05-10 22:41:43 +0900534
Ryusuke Konishi75124872010-01-26 13:59:40 +0900535 ret = -EFAULT;
536 if (copy_from_user(argv, argp, sizeof(argv)))
537 goto out;
538
539 ret = -EINVAL;
Ryusuke Konishi4f6b8282009-05-10 22:41:43 +0900540 nsegs = argv[4].v_nmembs;
541 if (argv[4].v_size != argsz[4])
Ryusuke Konishi75124872010-01-26 13:59:40 +0900542 goto out;
543
Ryusuke Konishi4f6b8282009-05-10 22:41:43 +0900544 /*
545 * argv[4] points to segment numbers this ioctl cleans. We
546 * use kmalloc() for its buffer because memory used for the
547 * segment numbers is enough small.
548 */
549 kbufs[4] = memdup_user((void __user *)(unsigned long)argv[4].v_base,
550 nsegs * sizeof(__u64));
Ryusuke Konishi75124872010-01-26 13:59:40 +0900551 if (IS_ERR(kbufs[4])) {
552 ret = PTR_ERR(kbufs[4]);
553 goto out;
554 }
Ryusuke Konishi4f6b8282009-05-10 22:41:43 +0900555 nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
556
557 for (n = 0; n < 4; n++) {
558 ret = -EINVAL;
559 if (argv[n].v_size != argsz[n])
560 goto out_free;
561
562 if (argv[n].v_nmembs > nsegs * nilfs->ns_blocks_per_segment)
563 goto out_free;
564
565 len = argv[n].v_size * argv[n].v_nmembs;
566 base = (void __user *)(unsigned long)argv[n].v_base;
567 if (len == 0) {
568 kbufs[n] = NULL;
569 continue;
570 }
571
572 kbufs[n] = vmalloc(len);
573 if (!kbufs[n]) {
574 ret = -ENOMEM;
575 goto out_free;
576 }
577 if (copy_from_user(kbufs[n], base, len)) {
578 ret = -EFAULT;
579 vfree(kbufs[n]);
580 goto out_free;
581 }
582 }
583
Jiro SEKIBA1cf58fa2009-09-03 22:24:17 +0900584 /*
Ryusuke Konishi263d90c2010-08-20 19:06:11 +0900585 * nilfs_ioctl_move_blocks() will call nilfs_iget_for_gc(),
Jiro SEKIBA1cf58fa2009-09-03 22:24:17 +0900586 * which will operates an inode list without blocking.
587 * To protect the list from concurrent operations,
588 * nilfs_ioctl_move_blocks should be atomic operation.
589 */
590 if (test_and_set_bit(THE_NILFS_GC_RUNNING, &nilfs->ns_flags)) {
591 ret = -EBUSY;
592 goto out_free;
593 }
594
Ryusuke Konishi5beb6e02010-09-20 18:19:06 +0900595 vfs_check_frozen(inode->i_sb, SB_FREEZE_WRITE);
596
Ryusuke Konishi263d90c2010-08-20 19:06:11 +0900597 ret = nilfs_ioctl_move_blocks(inode->i_sb, &argv[0], kbufs[0]);
Jiro SEKIBA1cf58fa2009-09-03 22:24:17 +0900598 if (ret < 0)
599 printk(KERN_ERR "NILFS: GC failed during preparation: "
600 "cannot read source blocks: err=%d\n", ret);
601 else
602 ret = nilfs_clean_segments(inode->i_sb, argv, kbufs);
603
Ryusuke Konishi263d90c2010-08-20 19:06:11 +0900604 nilfs_remove_all_gcinodes(nilfs);
Jiro SEKIBA1cf58fa2009-09-03 22:24:17 +0900605 clear_nilfs_gc_running(nilfs);
Ryusuke Konishi4f6b8282009-05-10 22:41:43 +0900606
Ryusuke Konishi75124872010-01-26 13:59:40 +0900607out_free:
Ryusuke Konishid50468532009-05-22 20:36:21 +0900608 while (--n >= 0)
Ryusuke Konishi4f6b8282009-05-10 22:41:43 +0900609 vfree(kbufs[n]);
610 kfree(kbufs[4]);
Ryusuke Konishi75124872010-01-26 13:59:40 +0900611out:
612 mnt_drop_write(filp->f_path.mnt);
Ryusuke Konishi4f6b8282009-05-10 22:41:43 +0900613 return ret;
Koji Sato7942b912009-04-06 19:01:41 -0700614}
615
616static int nilfs_ioctl_sync(struct inode *inode, struct file *filp,
617 unsigned int cmd, void __user *argp)
618{
619 __u64 cno;
620 int ret;
Jiro SEKIBA0d561f12010-02-20 19:47:49 +0900621 struct the_nilfs *nilfs;
Koji Sato7942b912009-04-06 19:01:41 -0700622
623 ret = nilfs_construct_segment(inode->i_sb);
624 if (ret < 0)
625 return ret;
626
627 if (argp != NULL) {
Jiro SEKIBA0d561f12010-02-20 19:47:49 +0900628 nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
629 down_read(&nilfs->ns_segctor_sem);
630 cno = nilfs->ns_cno - 1;
631 up_read(&nilfs->ns_segctor_sem);
Koji Sato7942b912009-04-06 19:01:41 -0700632 if (copy_to_user(argp, &cno, sizeof(cno)))
633 return -EFAULT;
634 }
635 return 0;
636}
637
Ryusuke Konishi47eb6b92009-04-30 02:21:00 +0900638static int nilfs_ioctl_get_info(struct inode *inode, struct file *filp,
639 unsigned int cmd, void __user *argp,
Ryusuke Konishi83aca8f2009-05-11 23:24:47 +0900640 size_t membsz,
Ryusuke Konishi47eb6b92009-04-30 02:21:00 +0900641 ssize_t (*dofunc)(struct the_nilfs *,
642 __u64 *, int,
643 void *, size_t, size_t))
644
645{
646 struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
647 struct nilfs_argv argv;
648 int ret;
649
650 if (copy_from_user(&argv, argp, sizeof(argv)))
651 return -EFAULT;
652
Ryusuke Konishi003ff182009-05-12 03:58:47 +0900653 if (argv.v_size < membsz)
Ryusuke Konishi83aca8f2009-05-11 23:24:47 +0900654 return -EINVAL;
655
Ryusuke Konishi47eb6b92009-04-30 02:21:00 +0900656 ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), dofunc);
657 if (ret < 0)
658 return ret;
659
660 if (copy_to_user(argp, &argv, sizeof(argv)))
661 ret = -EFAULT;
662 return ret;
663}
664
Ryusuke Konishi7a946192009-04-06 19:01:53 -0700665long nilfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
Koji Sato7942b912009-04-06 19:01:41 -0700666{
Ryusuke Konishi7a946192009-04-06 19:01:53 -0700667 struct inode *inode = filp->f_dentry->d_inode;
Li Hong75323402010-03-31 15:41:00 +0800668 void __user *argp = (void __user *)arg;
Koji Sato7942b912009-04-06 19:01:41 -0700669
670 switch (cmd) {
671 case NILFS_IOCTL_CHANGE_CPMODE:
672 return nilfs_ioctl_change_cpmode(inode, filp, cmd, argp);
673 case NILFS_IOCTL_DELETE_CHECKPOINT:
674 return nilfs_ioctl_delete_checkpoint(inode, filp, cmd, argp);
675 case NILFS_IOCTL_GET_CPINFO:
Ryusuke Konishi47eb6b92009-04-30 02:21:00 +0900676 return nilfs_ioctl_get_info(inode, filp, cmd, argp,
Ryusuke Konishi83aca8f2009-05-11 23:24:47 +0900677 sizeof(struct nilfs_cpinfo),
Ryusuke Konishi47eb6b92009-04-30 02:21:00 +0900678 nilfs_ioctl_do_get_cpinfo);
Koji Sato7942b912009-04-06 19:01:41 -0700679 case NILFS_IOCTL_GET_CPSTAT:
680 return nilfs_ioctl_get_cpstat(inode, filp, cmd, argp);
681 case NILFS_IOCTL_GET_SUINFO:
Ryusuke Konishi47eb6b92009-04-30 02:21:00 +0900682 return nilfs_ioctl_get_info(inode, filp, cmd, argp,
Ryusuke Konishi83aca8f2009-05-11 23:24:47 +0900683 sizeof(struct nilfs_suinfo),
Ryusuke Konishi47eb6b92009-04-30 02:21:00 +0900684 nilfs_ioctl_do_get_suinfo);
Koji Sato7942b912009-04-06 19:01:41 -0700685 case NILFS_IOCTL_GET_SUSTAT:
686 return nilfs_ioctl_get_sustat(inode, filp, cmd, argp);
687 case NILFS_IOCTL_GET_VINFO:
Ryusuke Konishi47eb6b92009-04-30 02:21:00 +0900688 return nilfs_ioctl_get_info(inode, filp, cmd, argp,
Ryusuke Konishi83aca8f2009-05-11 23:24:47 +0900689 sizeof(struct nilfs_vinfo),
Ryusuke Konishi47eb6b92009-04-30 02:21:00 +0900690 nilfs_ioctl_do_get_vinfo);
Koji Sato7942b912009-04-06 19:01:41 -0700691 case NILFS_IOCTL_GET_BDESCS:
692 return nilfs_ioctl_get_bdescs(inode, filp, cmd, argp);
693 case NILFS_IOCTL_CLEAN_SEGMENTS:
694 return nilfs_ioctl_clean_segments(inode, filp, cmd, argp);
Koji Sato7942b912009-04-06 19:01:41 -0700695 case NILFS_IOCTL_SYNC:
696 return nilfs_ioctl_sync(inode, filp, cmd, argp);
697 default:
698 return -ENOTTY;
699 }
700}