[linux.git] / fs / nilfs2 / ioctl.c

/*
 * ioctl.c - NILFS ioctl operations.
 *
 * Copyright (C) 2007, 2008 Nippon Telegraph and Telephone Corporation.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * Written by Koji Sato <[email protected]>.
 */

#include <linux/fs.h>
#include <linux/wait.h>
#include <linux/smp_lock.h>	/* lock_kernel(), unlock_kernel() */
#include <linux/capability.h>	/* capable() */
#include <linux/uaccess.h>	/* copy_from_user(), copy_to_user() */
#include <linux/vmalloc.h>
#include <linux/nilfs2_fs.h>
#include "nilfs.h"
#include "segment.h"
#include "bmap.h"
#include "cpfile.h"
#include "sufile.h"
#include "dat.h"


static int nilfs_ioctl_wrap_copy(struct the_nilfs *nilfs,
				 struct nilfs_argv *argv, int dir,
				 ssize_t (*dofunc)(struct the_nilfs *,
						   __u64 *, int,
						   void *, size_t, size_t))
{
	void *buf;
	void __user *base = (void __user *)(unsigned long)argv->v_base;
	size_t maxmembs, total, n;
	ssize_t nr;
	int ret, i;
	__u64 pos, ppos;

	if (argv->v_nmembs == 0)
		return 0;

	if (argv->v_size > PAGE_SIZE)
		return -EINVAL;

	buf = (void *)__get_free_pages(GFP_NOFS, 0);
	if (unlikely(!buf))
		return -ENOMEM;
	maxmembs = PAGE_SIZE / argv->v_size;

	ret = 0;
	total = 0;
	pos = argv->v_index;
	for (i = 0; i < argv->v_nmembs; i += n) {
		n = (argv->v_nmembs - i < maxmembs) ?
			argv->v_nmembs - i : maxmembs;
		if ((dir & _IOC_WRITE) &&
		    copy_from_user(buf, base + argv->v_size * i,
				   argv->v_size * n)) {
			ret = -EFAULT;
			break;
		}
		ppos = pos;
		nr = dofunc(nilfs, &pos, argv->v_flags, buf, argv->v_size,
			       n);
		if (nr < 0) {
			ret = nr;
			break;
		}
		if ((dir & _IOC_READ) &&
		    copy_to_user(base + argv->v_size * i, buf,
				 argv->v_size * nr)) {
			ret = -EFAULT;
			break;
		}
		total += nr;
		if ((size_t)nr < n)
			break;
		if (pos == ppos)
			pos += n;
	}
	argv->v_nmembs = total;

	free_pages((unsigned long)buf, 0);
	return ret;
}

static int nilfs_ioctl_change_cpmode(struct inode *inode, struct file *filp,
				     unsigned int cmd, void __user *argp)
{
	struct inode *cpfile = NILFS_SB(inode->i_sb)->s_nilfs->ns_cpfile;
	struct nilfs_transaction_info ti;
	struct nilfs_cpmode cpmode;
	int ret;

	if (!capable(CAP_SYS_ADMIN))
		return -EPERM;
	if (copy_from_user(&cpmode, argp, sizeof(cpmode)))
		return -EFAULT;

	nilfs_transaction_begin(inode->i_sb, &ti, 0);
	ret = nilfs_cpfile_change_cpmode(
		cpfile, cpmode.cm_cno, cpmode.cm_mode);
	if (unlikely(ret < 0)) {
		nilfs_transaction_abort(inode->i_sb);
		return ret;
	}
	nilfs_transaction_commit(inode->i_sb); /* never fails */
	return ret;
}

static int
nilfs_ioctl_delete_checkpoint(struct inode *inode, struct file *filp,
			      unsigned int cmd, void __user *argp)
{
	struct inode *cpfile = NILFS_SB(inode->i_sb)->s_nilfs->ns_cpfile;
	struct nilfs_transaction_info ti;
	__u64 cno;
	int ret;

	if (!capable(CAP_SYS_ADMIN))
		return -EPERM;
	if (copy_from_user(&cno, argp, sizeof(cno)))
		return -EFAULT;

	nilfs_transaction_begin(inode->i_sb, &ti, 0);
	ret = nilfs_cpfile_delete_checkpoint(cpfile, cno);
	if (unlikely(ret < 0)) {
		nilfs_transaction_abort(inode->i_sb);
		return ret;
	}
	nilfs_transaction_commit(inode->i_sb); /* never fails */
	return ret;
}

static ssize_t
nilfs_ioctl_do_get_cpinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
			  void *buf, size_t size, size_t nmembs)
{
	int ret;

	down_read(&nilfs->ns_segctor_sem);
	ret = nilfs_cpfile_get_cpinfo(nilfs->ns_cpfile, posp, flags, buf,
				      nmembs);
	up_read(&nilfs->ns_segctor_sem);
	return ret;
}

static int nilfs_ioctl_get_cpstat(struct inode *inode, struct file *filp,
				  unsigned int cmd, void __user *argp)
{
	struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
	struct nilfs_cpstat cpstat;
	int ret;

	down_read(&nilfs->ns_segctor_sem);
	ret = nilfs_cpfile_get_stat(nilfs->ns_cpfile, &cpstat);
	up_read(&nilfs->ns_segctor_sem);
	if (ret < 0)
		return ret;

	if (copy_to_user(argp, &cpstat, sizeof(cpstat)))
		ret = -EFAULT;
	return ret;
}

static ssize_t
nilfs_ioctl_do_get_suinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
			  void *buf, size_t size, size_t nmembs)
{
	int ret;

	down_read(&nilfs->ns_segctor_sem);
	ret = nilfs_sufile_get_suinfo(nilfs->ns_sufile, *posp, buf, nmembs);
	up_read(&nilfs->ns_segctor_sem);
	return ret;
}

static int nilfs_ioctl_get_sustat(struct inode *inode, struct file *filp,
				  unsigned int cmd, void __user *argp)
{
	struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
	struct nilfs_sustat sustat;
	int ret;

	down_read(&nilfs->ns_segctor_sem);
	ret = nilfs_sufile_get_stat(nilfs->ns_sufile, &sustat);
	up_read(&nilfs->ns_segctor_sem);
	if (ret < 0)
		return ret;

	if (copy_to_user(argp, &sustat, sizeof(sustat)))
		ret = -EFAULT;
	return ret;
}

static ssize_t
nilfs_ioctl_do_get_vinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
			 void *buf, size_t size, size_t nmembs)
{
	int ret;

	down_read(&nilfs->ns_segctor_sem);
	ret = nilfs_dat_get_vinfo(nilfs_dat_inode(nilfs), buf, nmembs);
	up_read(&nilfs->ns_segctor_sem);
	return ret;
}

static ssize_t
nilfs_ioctl_do_get_bdescs(struct the_nilfs *nilfs, __u64 *posp, int flags,
			  void *buf, size_t size, size_t nmembs)
{
	struct inode *dat = nilfs_dat_inode(nilfs);
	struct nilfs_bmap *bmap = NILFS_I(dat)->i_bmap;
	struct nilfs_bdesc *bdescs = buf;
	int ret, i;

	down_read(&nilfs->ns_segctor_sem);
	for (i = 0; i < nmembs; i++) {
		ret = nilfs_bmap_lookup_at_level(bmap,
						 bdescs[i].bd_offset,
						 bdescs[i].bd_level + 1,
						 &bdescs[i].bd_blocknr);
		if (ret < 0) {
			if (ret != -ENOENT) {
				up_read(&nilfs->ns_segctor_sem);
				return ret;
			}
			bdescs[i].bd_blocknr = 0;
		}
	}
	up_read(&nilfs->ns_segctor_sem);
	return nmembs;
}

static int nilfs_ioctl_get_bdescs(struct inode *inode, struct file *filp,
				  unsigned int cmd, void __user *argp)
{
	struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
	struct nilfs_argv argv;
	int ret;

	if (copy_from_user(&argv, argp, sizeof(argv)))
		return -EFAULT;

	ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd),
				    nilfs_ioctl_do_get_bdescs);
	if (ret < 0)
		return ret;

	if (copy_to_user(argp, &argv, sizeof(argv)))
		ret = -EFAULT;
	return ret;
}

static int nilfs_ioctl_move_inode_block(struct inode *inode,
					struct nilfs_vdesc *vdesc,
					struct list_head *buffers)
{
	struct buffer_head *bh;
	int ret;

	if (vdesc->vd_flags == 0)
		ret = nilfs_gccache_submit_read_data(
			inode, vdesc->vd_offset, vdesc->vd_blocknr,
			vdesc->vd_vblocknr, &bh);
	else
		ret = nilfs_gccache_submit_read_node(
			inode, vdesc->vd_blocknr, vdesc->vd_vblocknr, &bh);

	if (unlikely(ret < 0)) {
		if (ret == -ENOENT)
			printk(KERN_CRIT
			       "%s: invalid virtual block address (%s): "
			       "ino=%llu, cno=%llu, offset=%llu, "
			       "blocknr=%llu, vblocknr=%llu\n",
			       __func__, vdesc->vd_flags ? "node" : "data",
			       (unsigned long long)vdesc->vd_ino,
			       (unsigned long long)vdesc->vd_cno,
			       (unsigned long long)vdesc->vd_offset,
			       (unsigned long long)vdesc->vd_blocknr,
			       (unsigned long long)vdesc->vd_vblocknr);
		return ret;
	}
	bh->b_private = vdesc;
	list_add_tail(&bh->b_assoc_buffers, buffers);
	return 0;
}

static int nilfs_ioctl_move_blocks(struct the_nilfs *nilfs,
				   struct nilfs_argv *argv, void *buf)
{
	size_t nmembs = argv->v_nmembs;
	struct inode *inode;
	struct nilfs_vdesc *vdesc;
	struct buffer_head *bh, *n;
	LIST_HEAD(buffers);
	ino_t ino;
	__u64 cno;
	int i, ret;

	for (i = 0, vdesc = buf; i < nmembs; ) {
		ino = vdesc->vd_ino;
		cno = vdesc->vd_cno;
		inode = nilfs_gc_iget(nilfs, ino, cno);
		if (unlikely(inode == NULL)) {
			ret = -ENOMEM;
			goto failed;
		}
		do {
			ret = nilfs_ioctl_move_inode_block(inode, vdesc,
							   &buffers);
			if (unlikely(ret < 0))
				goto failed;
			vdesc++;
		} while (++i < nmembs &&
			 vdesc->vd_ino == ino && vdesc->vd_cno == cno);
	}

	list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) {
		ret = nilfs_gccache_wait_and_mark_dirty(bh);
		if (unlikely(ret < 0)) {
			if (ret == -EEXIST) {
				vdesc = bh->b_private;
				printk(KERN_CRIT
				       "%s: conflicting %s buffer: "
				       "ino=%llu, cno=%llu, offset=%llu, "
				       "blocknr=%llu, vblocknr=%llu\n",
				       __func__,
				       vdesc->vd_flags ? "node" : "data",
				       (unsigned long long)vdesc->vd_ino,
				       (unsigned long long)vdesc->vd_cno,
				       (unsigned long long)vdesc->vd_offset,
				       (unsigned long long)vdesc->vd_blocknr,
				       (unsigned long long)vdesc->vd_vblocknr);
			}
			goto failed;
		}
		list_del_init(&bh->b_assoc_buffers);
		bh->b_private = NULL;
		brelse(bh);
	}
	return nmembs;

 failed:
	list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) {
		list_del_init(&bh->b_assoc_buffers);
		bh->b_private = NULL;
		brelse(bh);
	}
	return ret;
}

static int nilfs_ioctl_delete_checkpoints(struct the_nilfs *nilfs,
					  struct nilfs_argv *argv, void *buf)
{
	size_t nmembs = argv->v_nmembs;
	struct inode *cpfile = nilfs->ns_cpfile;
	struct nilfs_period *periods = buf;
	int ret, i;

	for (i = 0; i < nmembs; i++) {
		ret = nilfs_cpfile_delete_checkpoints(
			cpfile, periods[i].p_start, periods[i].p_end);
		if (ret < 0)
			return ret;
	}
	return nmembs;
}

static int nilfs_ioctl_free_vblocknrs(struct the_nilfs *nilfs,
				      struct nilfs_argv *argv, void *buf)
{
	size_t nmembs = argv->v_nmembs;
	int ret;

	ret = nilfs_dat_freev(nilfs_dat_inode(nilfs), buf, nmembs);

	return (ret < 0) ? ret : nmembs;
}

static int nilfs_ioctl_mark_blocks_dirty(struct the_nilfs *nilfs,
					 struct nilfs_argv *argv, void *buf)
{
	size_t nmembs = argv->v_nmembs;
	struct inode *dat = nilfs_dat_inode(nilfs);
	struct nilfs_bmap *bmap = NILFS_I(dat)->i_bmap;
	struct nilfs_bdesc *bdescs = buf;
	int ret, i;

	for (i = 0; i < nmembs; i++) {
		/* XXX: use macro or inline func to check liveness */
		ret = nilfs_bmap_lookup_at_level(bmap,
						 bdescs[i].bd_offset,
						 bdescs[i].bd_level + 1,
						 &bdescs[i].bd_blocknr);
		if (ret < 0) {
			if (ret != -ENOENT)
				return ret;
			bdescs[i].bd_blocknr = 0;
		}
		if (bdescs[i].bd_blocknr != bdescs[i].bd_oblocknr)
			/* skip dead block */
			continue;
		if (bdescs[i].bd_level == 0) {
			ret = nilfs_mdt_mark_block_dirty(dat,
							 bdescs[i].bd_offset);
			if (ret < 0) {
				WARN_ON(ret == -ENOENT);
				return ret;
			}
		} else {
			ret = nilfs_bmap_mark(bmap, bdescs[i].bd_offset,
					      bdescs[i].bd_level);
			if (ret < 0) {
				WARN_ON(ret == -ENOENT);
				return ret;
			}
		}
	}
	return nmembs;
}

static int nilfs_ioctl_free_segments(struct the_nilfs *nilfs,
				     struct nilfs_argv *argv, void *buf)
{
	size_t nmembs = argv->v_nmembs;
	struct nilfs_sb_info *sbi = nilfs->ns_writer;
	int ret;

	if (unlikely(!sbi)) {
		/* never happens because called for a writable mount */
		WARN_ON(1);
		return -EROFS;
	}
	ret = nilfs_segctor_add_segments_to_be_freed(
		NILFS_SC(sbi), buf, nmembs);

	return (ret < 0) ? ret : nmembs;
}

int nilfs_ioctl_prepare_clean_segments(struct the_nilfs *nilfs,
				       struct nilfs_argv *argv, void **kbufs)
{
	const char *msg;
	int ret;

	ret = nilfs_ioctl_move_blocks(nilfs, &argv[0], kbufs[0]);
	if (ret < 0) {
		msg = "cannot read source blocks";
		goto failed;
	}

	ret = nilfs_ioctl_delete_checkpoints(nilfs, &argv[1], kbufs[1]);
	if (ret < 0) {
		/*
		 * can safely abort because checkpoints can be removed
		 * independently.
		 */
		msg = "cannot delete checkpoints";
		goto failed;
	}
	ret = nilfs_ioctl_free_vblocknrs(nilfs, &argv[2], kbufs[2]);
	if (ret < 0) {
		/*
		 * can safely abort because DAT file is updated atomically
		 * using a copy-on-write technique.
		 */
		msg = "cannot delete virtual blocks from DAT file";
		goto failed;
	}
	ret = nilfs_ioctl_mark_blocks_dirty(nilfs, &argv[3], kbufs[3]);
	if (ret < 0) {
		/*
		 * can safely abort because the operation is nondestructive.
		 */
		msg = "cannot mark copying blocks dirty";
		goto failed;
	}
	ret = nilfs_ioctl_free_segments(nilfs, &argv[4], kbufs[4]);
	if (ret < 0) {
		/*
		 * can safely abort because this operation is atomic.
		 */
		msg = "cannot set segments to be freed";
		goto failed;
	}
	return 0;

 failed:
	nilfs_remove_all_gcinode(nilfs);
	printk(KERN_ERR "NILFS: GC failed during preparation: %s: err=%d\n",
	       msg, ret);
	return ret;
}

static int nilfs_ioctl_clean_segments(struct inode *inode, struct file *filp,
				      unsigned int cmd, void __user *argp)
{
	struct nilfs_argv argv[5];
	const static size_t argsz[5] = {
		sizeof(struct nilfs_vdesc),
		sizeof(struct nilfs_period),
		sizeof(__u64),
		sizeof(struct nilfs_bdesc),
		sizeof(__u64),
	};
	void __user *base;
	void *kbufs[5];
	struct the_nilfs *nilfs;
	size_t len, nsegs;
	int n, ret;

	if (!capable(CAP_SYS_ADMIN))
		return -EPERM;

	if (copy_from_user(argv, argp, sizeof(argv)))
		return -EFAULT;

	nsegs = argv[4].v_nmembs;
	if (argv[4].v_size != argsz[4])
		return -EINVAL;
	/*
	 * argv[4] points to segment numbers this ioctl cleans.  We
	 * use kmalloc() for its buffer because memory used for the
	 * segment numbers is enough small.
	 */
	kbufs[4] = memdup_user((void __user *)(unsigned long)argv[4].v_base,
			       nsegs * sizeof(__u64));
	if (IS_ERR(kbufs[4]))
		return PTR_ERR(kbufs[4]);

	nilfs = NILFS_SB(inode->i_sb)->s_nilfs;

	for (n = 0; n < 4; n++) {
		ret = -EINVAL;
		if (argv[n].v_size != argsz[n])
			goto out_free;

		if (argv[n].v_nmembs > nsegs * nilfs->ns_blocks_per_segment)
			goto out_free;

		len = argv[n].v_size * argv[n].v_nmembs;
		base = (void __user *)(unsigned long)argv[n].v_base;
		if (len == 0) {
			kbufs[n] = NULL;
			continue;
		}

		kbufs[n] = vmalloc(len);
		if (!kbufs[n]) {
			ret = -ENOMEM;
			goto out_free;
		}
		if (copy_from_user(kbufs[n], base, len)) {
			ret = -EFAULT;
			vfree(kbufs[n]);
			goto out_free;
		}
	}

	ret = nilfs_clean_segments(inode->i_sb, argv, kbufs);

 out_free:
	while (--n > 0)
		vfree(kbufs[n]);
	kfree(kbufs[4]);
	return ret;
}

static int nilfs_ioctl_sync(struct inode *inode, struct file *filp,
			    unsigned int cmd, void __user *argp)
{
	__u64 cno;
	int ret;

	ret = nilfs_construct_segment(inode->i_sb);
	if (ret < 0)
		return ret;

	if (argp != NULL) {
		cno = NILFS_SB(inode->i_sb)->s_nilfs->ns_cno - 1;
		if (copy_to_user(argp, &cno, sizeof(cno)))
			return -EFAULT;
	}
	return 0;
}

static int nilfs_ioctl_get_info(struct inode *inode, struct file *filp,
				unsigned int cmd, void __user *argp,
				ssize_t (*dofunc)(struct the_nilfs *,
						  __u64 *, int,
						  void *, size_t, size_t))

{
	struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
	struct nilfs_argv argv;
	int ret;

	if (copy_from_user(&argv, argp, sizeof(argv)))
		return -EFAULT;

	ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), dofunc);
	if (ret < 0)
		return ret;

	if (copy_to_user(argp, &argv, sizeof(argv)))
		ret = -EFAULT;
	return ret;
}

long nilfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
	struct inode *inode = filp->f_dentry->d_inode;
	void __user *argp = (void * __user *)arg;

	switch (cmd) {
	case NILFS_IOCTL_CHANGE_CPMODE:
		return nilfs_ioctl_change_cpmode(inode, filp, cmd, argp);
	case NILFS_IOCTL_DELETE_CHECKPOINT:
		return nilfs_ioctl_delete_checkpoint(inode, filp, cmd, argp);
	case NILFS_IOCTL_GET_CPINFO:
		return nilfs_ioctl_get_info(inode, filp, cmd, argp,
					    nilfs_ioctl_do_get_cpinfo);
	case NILFS_IOCTL_GET_CPSTAT:
		return nilfs_ioctl_get_cpstat(inode, filp, cmd, argp);
	case NILFS_IOCTL_GET_SUINFO:
		return nilfs_ioctl_get_info(inode, filp, cmd, argp,
					    nilfs_ioctl_do_get_suinfo);
	case NILFS_IOCTL_GET_SUSTAT:
		return nilfs_ioctl_get_sustat(inode, filp, cmd, argp);
	case NILFS_IOCTL_GET_VINFO:
		return nilfs_ioctl_get_info(inode, filp, cmd, argp,
					    nilfs_ioctl_do_get_vinfo);
	case NILFS_IOCTL_GET_BDESCS:
		return nilfs_ioctl_get_bdescs(inode, filp, cmd, argp);
	case NILFS_IOCTL_CLEAN_SEGMENTS:
		return nilfs_ioctl_clean_segments(inode, filp, cmd, argp);
	case NILFS_IOCTL_SYNC:
		return nilfs_ioctl_sync(inode, filp, cmd, argp);
	default:
		return -ENOTTY;
	}
}
Commit	Line	Data
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 <[email protected]>.
	21	*/
	22
	23	#include <linux/fs.h>
	24	#include <linux/wait.h>
	25	#include <linux/smp_lock.h> /* lock_kernel(), unlock_kernel() */
	26	#include <linux/capability.h> /* capable() */
	27	#include <linux/uaccess.h> /* copy_from_user(), copy_to_user() */
4f6b8288	28	#include <linux/vmalloc.h>
7942b919 KS	29	#include <linux/nilfs2_fs.h>
	30	#include "nilfs.h"
	31	#include "segment.h"
	32	#include "bmap.h"
	33	#include "cpfile.h"
	34	#include "sufile.h"
	35	#include "dat.h"
	36
	37
7942b919 KS	38	static int nilfs_ioctl_wrap_copy(struct the_nilfs *nilfs,
	39	struct nilfs_argv *argv, int dir,
	40	ssize_t (dofunc)(struct the_nilfs ,
b028fcfc	41	__u64 *, int,
7942b919 KS	42	void *, size_t, size_t))
	43	{
	44	void *buf;
dc498d09	45	void __user base = (void __user )(unsigned long)argv->v_base;
3358b4aa	46	size_t maxmembs, total, n;
7942b919 KS	47	ssize_t nr;
7942b919 KS	48	int ret, i;
b028fcfc	49	__u64 pos, ppos;
7942b919 KS	50
	51	if (argv->v_nmembs == 0)
	52	return 0;
	53
3358b4aa RK	54	if (argv->v_size > PAGE_SIZE)
	55	return -EINVAL;
	56
	57	buf = (void *)__get_free_pages(GFP_NOFS, 0);
	58	if (unlikely(!buf))
7942b919	59	return -ENOMEM;
3358b4aa	60	maxmembs = PAGE_SIZE / argv->v_size;
7942b919 KS	61
	62	ret = 0;
	63	total = 0;
b028fcfc	64	pos = argv->v_index;
7942b919 KS	65	for (i = 0; i < argv->v_nmembs; i += n) {
	66	n = (argv->v_nmembs - i < maxmembs) ?
	67	argv->v_nmembs - i : maxmembs;
	68	if ((dir & _IOC_WRITE) &&
dc498d09 RK	69	copy_from_user(buf, base + argv->v_size * i,
dc498d09 RK	70	argv->v_size * n)) {
7942b919 KS	71	ret = -EFAULT;
	72	break;
	73	}
b028fcfc	74	ppos = pos;
8acfbf09	75	nr = dofunc(nilfs, &pos, argv->v_flags, buf, argv->v_size,
b028fcfc	76	n);
7942b919 KS	77	if (nr < 0) {
	78	ret = nr;
	79	break;
	80	}
	81	if ((dir & _IOC_READ) &&
dc498d09 RK	82	copy_to_user(base + argv->v_size * i, buf,
dc498d09 RK	83	argv->v_size * nr)) {
7942b919 KS	84	ret = -EFAULT;
	85	break;
	86	}
	87	total += nr;
b028fcfc RK	88	if ((size_t)nr < n)
	89	break;
	90	if (pos == ppos)
	91	pos += n;
7942b919 KS	92	}
	93	argv->v_nmembs = total;
	94
3358b4aa	95	free_pages((unsigned long)buf, 0);
7942b919 KS	96	return ret;
	97	}
	98
	99	static int nilfs_ioctl_change_cpmode(struct inode inode, struct file filp,
	100	unsigned int cmd, void __user *argp)
	101	{
	102	struct inode *cpfile = NILFS_SB(inode->i_sb)->s_nilfs->ns_cpfile;
	103	struct nilfs_transaction_info ti;
	104	struct nilfs_cpmode cpmode;
	105	int ret;
	106
	107	if (!capable(CAP_SYS_ADMIN))
	108	return -EPERM;
	109	if (copy_from_user(&cpmode, argp, sizeof(cpmode)))
	110	return -EFAULT;
	111
	112	nilfs_transaction_begin(inode->i_sb, &ti, 0);
	113	ret = nilfs_cpfile_change_cpmode(
	114	cpfile, cpmode.cm_cno, cpmode.cm_mode);
47420c79 RK	115	if (unlikely(ret < 0)) {
	116	nilfs_transaction_abort(inode->i_sb);
	117	return ret;
	118	}
	119	nilfs_transaction_commit(inode->i_sb); /* never fails */
7942b919 KS	120	return ret;
	121	}
	122
	123	static int
	124	nilfs_ioctl_delete_checkpoint(struct inode inode, struct file filp,
	125	unsigned int cmd, void __user *argp)
	126	{
	127	struct inode *cpfile = NILFS_SB(inode->i_sb)->s_nilfs->ns_cpfile;
	128	struct nilfs_transaction_info ti;
	129	__u64 cno;
	130	int ret;
	131
	132	if (!capable(CAP_SYS_ADMIN))
	133	return -EPERM;
	134	if (copy_from_user(&cno, argp, sizeof(cno)))
	135	return -EFAULT;
	136
	137	nilfs_transaction_begin(inode->i_sb, &ti, 0);
	138	ret = nilfs_cpfile_delete_checkpoint(cpfile, cno);
47420c79 RK	139	if (unlikely(ret < 0)) {
	140	nilfs_transaction_abort(inode->i_sb);
	141	return ret;
	142	}
	143	nilfs_transaction_commit(inode->i_sb); /* never fails */
7942b919 KS	144	return ret;
	145	}
	146
	147	static ssize_t
b028fcfc	148	nilfs_ioctl_do_get_cpinfo(struct the_nilfs nilfs, __u64 posp, int flags,
7942b919 KS	149	void *buf, size_t size, size_t nmembs)
7942b919 KS	150	{
7942b919 KS	151	int ret;
7942b919 KS	152
47420c79	153	down_read(&nilfs->ns_segctor_sem);
47eb6b9c RK	154	ret = nilfs_cpfile_get_cpinfo(nilfs->ns_cpfile, posp, flags, buf,
47eb6b9c RK	155	nmembs);
47420c79	156	up_read(&nilfs->ns_segctor_sem);
7942b919 KS	157	return ret;
	158	}
	159
	160	static int nilfs_ioctl_get_cpstat(struct inode inode, struct file filp,
	161	unsigned int cmd, void __user *argp)
	162	{
47420c79	163	struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
7942b919	164	struct nilfs_cpstat cpstat;
7942b919 KS	165	int ret;
7942b919 KS	166
47420c79 RK	167	down_read(&nilfs->ns_segctor_sem);
	168	ret = nilfs_cpfile_get_stat(nilfs->ns_cpfile, &cpstat);
	169	up_read(&nilfs->ns_segctor_sem);
7942b919 KS	170	if (ret < 0)
	171	return ret;
	172
	173	if (copy_to_user(argp, &cpstat, sizeof(cpstat)))
	174	ret = -EFAULT;
	175	return ret;
	176	}
	177
	178	static ssize_t
b028fcfc	179	nilfs_ioctl_do_get_suinfo(struct the_nilfs nilfs, __u64 posp, int flags,
7942b919 KS	180	void *buf, size_t size, size_t nmembs)
7942b919 KS	181	{
7942b919 KS	182	int ret;
7942b919 KS	183
47420c79	184	down_read(&nilfs->ns_segctor_sem);
47eb6b9c	185	ret = nilfs_sufile_get_suinfo(nilfs->ns_sufile, *posp, buf, nmembs);
47420c79	186	up_read(&nilfs->ns_segctor_sem);
7942b919 KS	187	return ret;
	188	}
	189
	190	static int nilfs_ioctl_get_sustat(struct inode inode, struct file filp,
	191	unsigned int cmd, void __user *argp)
	192	{
47420c79	193	struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
7942b919	194	struct nilfs_sustat sustat;
7942b919 KS	195	int ret;
7942b919 KS	196
47420c79 RK	197	down_read(&nilfs->ns_segctor_sem);
	198	ret = nilfs_sufile_get_stat(nilfs->ns_sufile, &sustat);
	199	up_read(&nilfs->ns_segctor_sem);
7942b919 KS	200	if (ret < 0)
	201	return ret;
	202
	203	if (copy_to_user(argp, &sustat, sizeof(sustat)))
	204	ret = -EFAULT;
	205	return ret;
	206	}
	207
	208	static ssize_t
b028fcfc	209	nilfs_ioctl_do_get_vinfo(struct the_nilfs nilfs, __u64 posp, int flags,
7942b919 KS	210	void *buf, size_t size, size_t nmembs)
7942b919 KS	211	{
7942b919 KS	212	int ret;
7942b919 KS	213
47420c79	214	down_read(&nilfs->ns_segctor_sem);
47eb6b9c	215	ret = nilfs_dat_get_vinfo(nilfs_dat_inode(nilfs), buf, nmembs);
47420c79	216	up_read(&nilfs->ns_segctor_sem);
7942b919 KS	217	return ret;
	218	}
	219
	220	static ssize_t
b028fcfc	221	nilfs_ioctl_do_get_bdescs(struct the_nilfs nilfs, __u64 posp, int flags,
7942b919 KS	222	void *buf, size_t size, size_t nmembs)
	223	{
	224	struct inode *dat = nilfs_dat_inode(nilfs);
	225	struct nilfs_bmap *bmap = NILFS_I(dat)->i_bmap;
	226	struct nilfs_bdesc *bdescs = buf;
	227	int ret, i;
	228
47eb6b9c	229	down_read(&nilfs->ns_segctor_sem);
7942b919 KS	230	for (i = 0; i < nmembs; i++) {
	231	ret = nilfs_bmap_lookup_at_level(bmap,
	232	bdescs[i].bd_offset,
	233	bdescs[i].bd_level + 1,
	234	&bdescs[i].bd_blocknr);
	235	if (ret < 0) {
47eb6b9c RK	236	if (ret != -ENOENT) {
47eb6b9c RK	237	up_read(&nilfs->ns_segctor_sem);
7942b919	238	return ret;
47eb6b9c	239	}
7942b919 KS	240	bdescs[i].bd_blocknr = 0;
	241	}
	242	}
47eb6b9c	243	up_read(&nilfs->ns_segctor_sem);
7942b919 KS	244	return nmembs;
	245	}
	246
	247	static int nilfs_ioctl_get_bdescs(struct inode inode, struct file filp,
	248	unsigned int cmd, void __user *argp)
	249	{
	250	struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
	251	struct nilfs_argv argv;
7942b919 KS	252	int ret;
	253
	254	if (copy_from_user(&argv, argp, sizeof(argv)))
	255	return -EFAULT;
	256
7942b919 KS	257	ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd),
7942b919 KS	258	nilfs_ioctl_do_get_bdescs);
47420c79 RK	259	if (ret < 0)
47420c79 RK	260	return ret;
7942b919 KS	261
	262	if (copy_to_user(argp, &argv, sizeof(argv)))
	263	ret = -EFAULT;
	264	return ret;
	265	}
	266
	267	static int nilfs_ioctl_move_inode_block(struct inode *inode,
	268	struct nilfs_vdesc *vdesc,
	269	struct list_head *buffers)
	270	{
	271	struct buffer_head *bh;
	272	int ret;
	273
	274	if (vdesc->vd_flags == 0)
	275	ret = nilfs_gccache_submit_read_data(
	276	inode, vdesc->vd_offset, vdesc->vd_blocknr,
	277	vdesc->vd_vblocknr, &bh);
	278	else
	279	ret = nilfs_gccache_submit_read_node(
	280	inode, vdesc->vd_blocknr, vdesc->vd_vblocknr, &bh);
	281
	282	if (unlikely(ret < 0)) {
	283	if (ret == -ENOENT)
	284	printk(KERN_CRIT
	285	"%s: invalid virtual block address (%s): "
	286	"ino=%llu, cno=%llu, offset=%llu, "
	287	"blocknr=%llu, vblocknr=%llu\n",
	288	__func__, vdesc->vd_flags ? "node" : "data",
	289	(unsigned long long)vdesc->vd_ino,
	290	(unsigned long long)vdesc->vd_cno,
	291	(unsigned long long)vdesc->vd_offset,
	292	(unsigned long long)vdesc->vd_blocknr,
	293	(unsigned long long)vdesc->vd_vblocknr);
	294	return ret;
	295	}
	296	bh->b_private = vdesc;
	297	list_add_tail(&bh->b_assoc_buffers, buffers);
	298	return 0;
	299	}
	300
4f6b8288 RK	301	static int nilfs_ioctl_move_blocks(struct the_nilfs *nilfs,
4f6b8288 RK	302	struct nilfs_argv argv, void buf)
7942b919	303	{
4f6b8288	304	size_t nmembs = argv->v_nmembs;
7942b919 KS	305	struct inode *inode;
	306	struct nilfs_vdesc *vdesc;
	307	struct buffer_head bh, n;
	308	LIST_HEAD(buffers);
	309	ino_t ino;
	310	__u64 cno;
	311	int i, ret;
	312
	313	for (i = 0, vdesc = buf; i < nmembs; ) {
	314	ino = vdesc->vd_ino;
	315	cno = vdesc->vd_cno;
	316	inode = nilfs_gc_iget(nilfs, ino, cno);
	317	if (unlikely(inode == NULL)) {
	318	ret = -ENOMEM;
	319	goto failed;
	320	}
	321	do {
	322	ret = nilfs_ioctl_move_inode_block(inode, vdesc,
	323	&buffers);
	324	if (unlikely(ret < 0))
	325	goto failed;
	326	vdesc++;
	327	} while (++i < nmembs &&
	328	vdesc->vd_ino == ino && vdesc->vd_cno == cno);
	329	}
	330
	331	list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) {
	332	ret = nilfs_gccache_wait_and_mark_dirty(bh);
	333	if (unlikely(ret < 0)) {
	334	if (ret == -EEXIST) {
	335	vdesc = bh->b_private;
	336	printk(KERN_CRIT
	337	"%s: conflicting %s buffer: "
	338	"ino=%llu, cno=%llu, offset=%llu, "
	339	"blocknr=%llu, vblocknr=%llu\n",
	340	__func__,
	341	vdesc->vd_flags ? "node" : "data",
	342	(unsigned long long)vdesc->vd_ino,
	343	(unsigned long long)vdesc->vd_cno,
	344	(unsigned long long)vdesc->vd_offset,
	345	(unsigned long long)vdesc->vd_blocknr,
	346	(unsigned long long)vdesc->vd_vblocknr);
	347	}
	348	goto failed;
	349	}
	350	list_del_init(&bh->b_assoc_buffers);
	351	bh->b_private = NULL;
	352	brelse(bh);
	353	}
	354	return nmembs;
	355
	356	failed:
	357	list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) {
	358	list_del_init(&bh->b_assoc_buffers);
	359	bh->b_private = NULL;
	360	brelse(bh);
	361	}
	362	return ret;
	363	}
	364
4f6b8288 RK	365	static int nilfs_ioctl_delete_checkpoints(struct the_nilfs *nilfs,
4f6b8288 RK	366	struct nilfs_argv argv, void buf)
7942b919	367	{
4f6b8288	368	size_t nmembs = argv->v_nmembs;
7942b919 KS	369	struct inode *cpfile = nilfs->ns_cpfile;
	370	struct nilfs_period *periods = buf;
	371	int ret, i;
	372
	373	for (i = 0; i < nmembs; i++) {
	374	ret = nilfs_cpfile_delete_checkpoints(
	375	cpfile, periods[i].p_start, periods[i].p_end);
	376	if (ret < 0)
	377	return ret;
	378	}
	379	return nmembs;
	380	}
	381
4f6b8288 RK	382	static int nilfs_ioctl_free_vblocknrs(struct the_nilfs *nilfs,
4f6b8288 RK	383	struct nilfs_argv argv, void buf)
7942b919	384	{
4f6b8288 RK	385	size_t nmembs = argv->v_nmembs;
4f6b8288 RK	386	int ret;
7942b919	387
4f6b8288	388	ret = nilfs_dat_freev(nilfs_dat_inode(nilfs), buf, nmembs);
7942b919 KS	389
	390	return (ret < 0) ? ret : nmembs;
	391	}
	392
4f6b8288 RK	393	static int nilfs_ioctl_mark_blocks_dirty(struct the_nilfs *nilfs,
4f6b8288 RK	394	struct nilfs_argv argv, void buf)
7942b919	395	{
4f6b8288	396	size_t nmembs = argv->v_nmembs;
7942b919 KS	397	struct inode *dat = nilfs_dat_inode(nilfs);
	398	struct nilfs_bmap *bmap = NILFS_I(dat)->i_bmap;
	399	struct nilfs_bdesc *bdescs = buf;
	400	int ret, i;
	401
	402	for (i = 0; i < nmembs; i++) {
	403	/* XXX: use macro or inline func to check liveness */
	404	ret = nilfs_bmap_lookup_at_level(bmap,
	405	bdescs[i].bd_offset,
	406	bdescs[i].bd_level + 1,
	407	&bdescs[i].bd_blocknr);
	408	if (ret < 0) {
	409	if (ret != -ENOENT)
	410	return ret;
	411	bdescs[i].bd_blocknr = 0;
	412	}
	413	if (bdescs[i].bd_blocknr != bdescs[i].bd_oblocknr)
	414	/* skip dead block */
	415	continue;
	416	if (bdescs[i].bd_level == 0) {
	417	ret = nilfs_mdt_mark_block_dirty(dat,
	418	bdescs[i].bd_offset);
	419	if (ret < 0) {
1f5abe7e	420	WARN_ON(ret == -ENOENT);
7942b919 KS	421	return ret;
	422	}
	423	} else {
	424	ret = nilfs_bmap_mark(bmap, bdescs[i].bd_offset,
	425	bdescs[i].bd_level);
	426	if (ret < 0) {
1f5abe7e	427	WARN_ON(ret == -ENOENT);
7942b919 KS	428	return ret;
	429	}
	430	}
	431	}
	432	return nmembs;
	433	}
	434
4f6b8288 RK	435	static int nilfs_ioctl_free_segments(struct the_nilfs *nilfs,
4f6b8288 RK	436	struct nilfs_argv argv, void buf)
7942b919	437	{
4f6b8288	438	size_t nmembs = argv->v_nmembs;
201913ed	439	struct nilfs_sb_info *sbi = nilfs->ns_writer;
7942b919 KS	440	int ret;
7942b919 KS	441
201913ed RK	442	if (unlikely(!sbi)) {
	443	/* never happens because called for a writable mount */
	444	WARN_ON(1);
1f5abe7e	445	return -EROFS;
201913ed	446	}
7942b919 KS	447	ret = nilfs_segctor_add_segments_to_be_freed(
7942b919 KS	448	NILFS_SC(sbi), buf, nmembs);
7942b919 KS	449
	450	return (ret < 0) ? ret : nmembs;
	451	}
	452
7942b919	453	int nilfs_ioctl_prepare_clean_segments(struct the_nilfs *nilfs,
4f6b8288	454	struct nilfs_argv argv, void *kbufs)
7942b919	455	{
1f5abe7e	456	const char *msg;
4f6b8288	457	int ret;
7942b919	458
4f6b8288	459	ret = nilfs_ioctl_move_blocks(nilfs, &argv[0], kbufs[0]);
1f5abe7e RK	460	if (ret < 0) {
	461	msg = "cannot read source blocks";
	462	goto failed;
	463	}
4f6b8288 RK	464
4f6b8288 RK	465	ret = nilfs_ioctl_delete_checkpoints(nilfs, &argv[1], kbufs[1]);
1f5abe7e RK	466	if (ret < 0) {
	467	/*
	468	* can safely abort because checkpoints can be removed
	469	* independently.
	470	*/
	471	msg = "cannot delete checkpoints";
	472	goto failed;
	473	}
4f6b8288	474	ret = nilfs_ioctl_free_vblocknrs(nilfs, &argv[2], kbufs[2]);
1f5abe7e RK	475	if (ret < 0) {
	476	/*
	477	* can safely abort because DAT file is updated atomically
	478	* using a copy-on-write technique.
	479	*/
	480	msg = "cannot delete virtual blocks from DAT file";
	481	goto failed;
	482	}
4f6b8288	483	ret = nilfs_ioctl_mark_blocks_dirty(nilfs, &argv[3], kbufs[3]);
1f5abe7e RK	484	if (ret < 0) {
	485	/*
	486	* can safely abort because the operation is nondestructive.
	487	*/
	488	msg = "cannot mark copying blocks dirty";
	489	goto failed;
	490	}
4f6b8288	491	ret = nilfs_ioctl_free_segments(nilfs, &argv[4], kbufs[4]);
1f5abe7e RK	492	if (ret < 0) {
	493	/*
	494	* can safely abort because this operation is atomic.
	495	*/
	496	msg = "cannot set segments to be freed";
	497	goto failed;
	498	}
7942b919 KS	499	return 0;
7942b919 KS	500
1f5abe7e	501	failed:
7942b919	502	nilfs_remove_all_gcinode(nilfs);
1f5abe7e RK	503	printk(KERN_ERR "NILFS: GC failed during preparation: %s: err=%d\n",
1f5abe7e RK	504	msg, ret);
7942b919 KS	505	return ret;
	506	}
	507
	508	static int nilfs_ioctl_clean_segments(struct inode inode, struct file filp,
	509	unsigned int cmd, void __user *argp)
	510	{
4f6b8288 RK	511	struct nilfs_argv argv[5];
	512	const static size_t argsz[5] = {
	513	sizeof(struct nilfs_vdesc),
	514	sizeof(struct nilfs_period),
	515	sizeof(__u64),
	516	sizeof(struct nilfs_bdesc),
	517	sizeof(__u64),
	518	};
	519	void __user *base;
	520	void *kbufs[5];
	521	struct the_nilfs *nilfs;
	522	size_t len, nsegs;
	523	int n, ret;
	524
7942b919 KS	525	if (!capable(CAP_SYS_ADMIN))
7942b919 KS	526	return -EPERM;
4f6b8288 RK	527
	528	if (copy_from_user(argv, argp, sizeof(argv)))
	529	return -EFAULT;
	530
	531	nsegs = argv[4].v_nmembs;
	532	if (argv[4].v_size != argsz[4])
	533	return -EINVAL;
	534	/*
	535	* argv[4] points to segment numbers this ioctl cleans. We
	536	* use kmalloc() for its buffer because memory used for the
	537	* segment numbers is enough small.
	538	*/
	539	kbufs[4] = memdup_user((void __user *)(unsigned long)argv[4].v_base,
	540	nsegs * sizeof(__u64));
	541	if (IS_ERR(kbufs[4]))
	542	return PTR_ERR(kbufs[4]);
	543
	544	nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
	545
	546	for (n = 0; n < 4; n++) {
	547	ret = -EINVAL;
	548	if (argv[n].v_size != argsz[n])
	549	goto out_free;
	550
	551	if (argv[n].v_nmembs > nsegs * nilfs->ns_blocks_per_segment)
	552	goto out_free;
	553
	554	len = argv[n].v_size * argv[n].v_nmembs;
	555	base = (void __user *)(unsigned long)argv[n].v_base;
	556	if (len == 0) {
	557	kbufs[n] = NULL;
	558	continue;
	559	}
	560
	561	kbufs[n] = vmalloc(len);
	562	if (!kbufs[n]) {
	563	ret = -ENOMEM;
	564	goto out_free;
	565	}
	566	if (copy_from_user(kbufs[n], base, len)) {
	567	ret = -EFAULT;
	568	vfree(kbufs[n]);
	569	goto out_free;
	570	}
	571	}
	572
	573	ret = nilfs_clean_segments(inode->i_sb, argv, kbufs);
	574
	575	out_free:
	576	while (--n > 0)
	577	vfree(kbufs[n]);
	578	kfree(kbufs[4]);
	579	return ret;
7942b919 KS	580	}
	581
	582	static int nilfs_ioctl_sync(struct inode inode, struct file filp,
	583	unsigned int cmd, void __user *argp)
	584	{
	585	__u64 cno;
	586	int ret;
	587
	588	ret = nilfs_construct_segment(inode->i_sb);
	589	if (ret < 0)
	590	return ret;
	591
	592	if (argp != NULL) {
	593	cno = NILFS_SB(inode->i_sb)->s_nilfs->ns_cno - 1;
	594	if (copy_to_user(argp, &cno, sizeof(cno)))
	595	return -EFAULT;
	596	}
	597	return 0;
	598	}
	599
47eb6b9c RK	600	static int nilfs_ioctl_get_info(struct inode inode, struct file filp,
	601	unsigned int cmd, void __user *argp,
	602	ssize_t (dofunc)(struct the_nilfs ,
	603	__u64 *, int,
	604	void *, size_t, size_t))
	605
	606	{
	607	struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
	608	struct nilfs_argv argv;
	609	int ret;
	610
	611	if (copy_from_user(&argv, argp, sizeof(argv)))
	612	return -EFAULT;
	613
	614	ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), dofunc);
	615	if (ret < 0)
	616	return ret;
	617
	618	if (copy_to_user(argp, &argv, sizeof(argv)))
	619	ret = -EFAULT;
	620	return ret;
	621	}
	622
7a946193	623	long nilfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
7942b919	624	{
7a946193	625	struct inode *inode = filp->f_dentry->d_inode;
7942b919 KS	626	void __user argp = (void __user *)arg;
	627
	628	switch (cmd) {
	629	case NILFS_IOCTL_CHANGE_CPMODE:
	630	return nilfs_ioctl_change_cpmode(inode, filp, cmd, argp);
	631	case NILFS_IOCTL_DELETE_CHECKPOINT:
	632	return nilfs_ioctl_delete_checkpoint(inode, filp, cmd, argp);
	633	case NILFS_IOCTL_GET_CPINFO:
47eb6b9c RK	634	return nilfs_ioctl_get_info(inode, filp, cmd, argp,
47eb6b9c RK	635	nilfs_ioctl_do_get_cpinfo);
7942b919 KS	636	case NILFS_IOCTL_GET_CPSTAT:
	637	return nilfs_ioctl_get_cpstat(inode, filp, cmd, argp);
	638	case NILFS_IOCTL_GET_SUINFO:
47eb6b9c RK	639	return nilfs_ioctl_get_info(inode, filp, cmd, argp,
47eb6b9c RK	640	nilfs_ioctl_do_get_suinfo);
7942b919 KS	641	case NILFS_IOCTL_GET_SUSTAT:
	642	return nilfs_ioctl_get_sustat(inode, filp, cmd, argp);
	643	case NILFS_IOCTL_GET_VINFO:
47eb6b9c RK	644	return nilfs_ioctl_get_info(inode, filp, cmd, argp,
47eb6b9c RK	645	nilfs_ioctl_do_get_vinfo);
7942b919 KS	646	case NILFS_IOCTL_GET_BDESCS:
	647	return nilfs_ioctl_get_bdescs(inode, filp, cmd, argp);
	648	case NILFS_IOCTL_CLEAN_SEGMENTS:
	649	return nilfs_ioctl_clean_segments(inode, filp, cmd, argp);
7942b919 KS	650	case NILFS_IOCTL_SYNC:
	651	return nilfs_ioctl_sync(inode, filp, cmd, argp);
	652	default:
	653	return -ENOTTY;
	654	}
	655	}