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![Ryusuke Konishi](/assets/img/avatar_default.png)
This adds resize ioctl which makes online resize possible. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
850 lines
21 KiB
C
850 lines
21 KiB
C
/*
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* ioctl.c - NILFS ioctl operations.
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*
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* Copyright (C) 2007, 2008 Nippon Telegraph and Telephone Corporation.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* Written by Koji Sato <koji@osrg.net>.
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*/
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#include <linux/fs.h>
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#include <linux/wait.h>
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#include <linux/slab.h>
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#include <linux/capability.h> /* capable() */
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#include <linux/uaccess.h> /* copy_from_user(), copy_to_user() */
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#include <linux/vmalloc.h>
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#include <linux/compat.h> /* compat_ptr() */
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#include <linux/mount.h> /* mnt_want_write(), mnt_drop_write() */
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#include <linux/buffer_head.h>
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#include <linux/nilfs2_fs.h>
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#include "nilfs.h"
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#include "segment.h"
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#include "bmap.h"
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#include "cpfile.h"
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#include "sufile.h"
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#include "dat.h"
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static int nilfs_ioctl_wrap_copy(struct the_nilfs *nilfs,
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struct nilfs_argv *argv, int dir,
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ssize_t (*dofunc)(struct the_nilfs *,
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__u64 *, int,
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void *, size_t, size_t))
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{
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void *buf;
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void __user *base = (void __user *)(unsigned long)argv->v_base;
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size_t maxmembs, total, n;
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ssize_t nr;
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int ret, i;
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__u64 pos, ppos;
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if (argv->v_nmembs == 0)
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return 0;
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if (argv->v_size > PAGE_SIZE)
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return -EINVAL;
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buf = (void *)__get_free_pages(GFP_NOFS, 0);
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if (unlikely(!buf))
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return -ENOMEM;
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maxmembs = PAGE_SIZE / argv->v_size;
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ret = 0;
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total = 0;
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pos = argv->v_index;
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for (i = 0; i < argv->v_nmembs; i += n) {
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n = (argv->v_nmembs - i < maxmembs) ?
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argv->v_nmembs - i : maxmembs;
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if ((dir & _IOC_WRITE) &&
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copy_from_user(buf, base + argv->v_size * i,
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argv->v_size * n)) {
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ret = -EFAULT;
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break;
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}
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ppos = pos;
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nr = dofunc(nilfs, &pos, argv->v_flags, buf, argv->v_size,
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n);
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if (nr < 0) {
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ret = nr;
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break;
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}
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if ((dir & _IOC_READ) &&
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copy_to_user(base + argv->v_size * i, buf,
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argv->v_size * nr)) {
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ret = -EFAULT;
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break;
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}
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total += nr;
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if ((size_t)nr < n)
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break;
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if (pos == ppos)
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pos += n;
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}
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argv->v_nmembs = total;
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free_pages((unsigned long)buf, 0);
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return ret;
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}
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static int nilfs_ioctl_getflags(struct inode *inode, void __user *argp)
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{
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unsigned int flags = NILFS_I(inode)->i_flags & FS_FL_USER_VISIBLE;
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return put_user(flags, (int __user *)argp);
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}
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static int nilfs_ioctl_setflags(struct inode *inode, struct file *filp,
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void __user *argp)
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{
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struct nilfs_transaction_info ti;
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unsigned int flags, oldflags;
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int ret;
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if (!inode_owner_or_capable(inode))
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return -EACCES;
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if (get_user(flags, (int __user *)argp))
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return -EFAULT;
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ret = mnt_want_write(filp->f_path.mnt);
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if (ret)
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return ret;
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flags = nilfs_mask_flags(inode->i_mode, flags);
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mutex_lock(&inode->i_mutex);
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oldflags = NILFS_I(inode)->i_flags;
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/*
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* The IMMUTABLE and APPEND_ONLY flags can only be changed by the
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* relevant capability.
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*/
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ret = -EPERM;
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if (((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) &&
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!capable(CAP_LINUX_IMMUTABLE))
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goto out;
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ret = nilfs_transaction_begin(inode->i_sb, &ti, 0);
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if (ret)
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goto out;
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NILFS_I(inode)->i_flags = (oldflags & ~FS_FL_USER_MODIFIABLE) |
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(flags & FS_FL_USER_MODIFIABLE);
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nilfs_set_inode_flags(inode);
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inode->i_ctime = CURRENT_TIME;
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if (IS_SYNC(inode))
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nilfs_set_transaction_flag(NILFS_TI_SYNC);
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nilfs_mark_inode_dirty(inode);
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ret = nilfs_transaction_commit(inode->i_sb);
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out:
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mutex_unlock(&inode->i_mutex);
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mnt_drop_write(filp->f_path.mnt);
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return ret;
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}
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static int nilfs_ioctl_getversion(struct inode *inode, void __user *argp)
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{
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return put_user(inode->i_generation, (int __user *)argp);
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}
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static int nilfs_ioctl_change_cpmode(struct inode *inode, struct file *filp,
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unsigned int cmd, void __user *argp)
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{
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struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
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struct nilfs_transaction_info ti;
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struct nilfs_cpmode cpmode;
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int ret;
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if (!capable(CAP_SYS_ADMIN))
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return -EPERM;
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ret = mnt_want_write(filp->f_path.mnt);
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if (ret)
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return ret;
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ret = -EFAULT;
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if (copy_from_user(&cpmode, argp, sizeof(cpmode)))
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goto out;
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down_read(&inode->i_sb->s_umount);
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nilfs_transaction_begin(inode->i_sb, &ti, 0);
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ret = nilfs_cpfile_change_cpmode(
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nilfs->ns_cpfile, cpmode.cm_cno, cpmode.cm_mode);
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if (unlikely(ret < 0))
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nilfs_transaction_abort(inode->i_sb);
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else
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nilfs_transaction_commit(inode->i_sb); /* never fails */
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up_read(&inode->i_sb->s_umount);
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out:
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mnt_drop_write(filp->f_path.mnt);
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return ret;
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}
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static int
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nilfs_ioctl_delete_checkpoint(struct inode *inode, struct file *filp,
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unsigned int cmd, void __user *argp)
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{
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struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
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struct nilfs_transaction_info ti;
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__u64 cno;
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int ret;
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if (!capable(CAP_SYS_ADMIN))
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return -EPERM;
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ret = mnt_want_write(filp->f_path.mnt);
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if (ret)
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return ret;
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ret = -EFAULT;
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if (copy_from_user(&cno, argp, sizeof(cno)))
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goto out;
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nilfs_transaction_begin(inode->i_sb, &ti, 0);
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ret = nilfs_cpfile_delete_checkpoint(nilfs->ns_cpfile, cno);
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if (unlikely(ret < 0))
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nilfs_transaction_abort(inode->i_sb);
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else
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nilfs_transaction_commit(inode->i_sb); /* never fails */
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out:
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mnt_drop_write(filp->f_path.mnt);
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return ret;
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}
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static ssize_t
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nilfs_ioctl_do_get_cpinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
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void *buf, size_t size, size_t nmembs)
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{
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int ret;
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down_read(&nilfs->ns_segctor_sem);
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ret = nilfs_cpfile_get_cpinfo(nilfs->ns_cpfile, posp, flags, buf,
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size, nmembs);
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up_read(&nilfs->ns_segctor_sem);
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return ret;
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}
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static int nilfs_ioctl_get_cpstat(struct inode *inode, struct file *filp,
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unsigned int cmd, void __user *argp)
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{
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struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
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struct nilfs_cpstat cpstat;
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int ret;
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down_read(&nilfs->ns_segctor_sem);
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ret = nilfs_cpfile_get_stat(nilfs->ns_cpfile, &cpstat);
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up_read(&nilfs->ns_segctor_sem);
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if (ret < 0)
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return ret;
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if (copy_to_user(argp, &cpstat, sizeof(cpstat)))
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ret = -EFAULT;
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return ret;
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}
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static ssize_t
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nilfs_ioctl_do_get_suinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
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void *buf, size_t size, size_t nmembs)
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{
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int ret;
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down_read(&nilfs->ns_segctor_sem);
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ret = nilfs_sufile_get_suinfo(nilfs->ns_sufile, *posp, buf, size,
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nmembs);
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up_read(&nilfs->ns_segctor_sem);
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return ret;
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}
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static int nilfs_ioctl_get_sustat(struct inode *inode, struct file *filp,
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unsigned int cmd, void __user *argp)
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{
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struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
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struct nilfs_sustat sustat;
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int ret;
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down_read(&nilfs->ns_segctor_sem);
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ret = nilfs_sufile_get_stat(nilfs->ns_sufile, &sustat);
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up_read(&nilfs->ns_segctor_sem);
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if (ret < 0)
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return ret;
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if (copy_to_user(argp, &sustat, sizeof(sustat)))
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ret = -EFAULT;
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return ret;
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}
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static ssize_t
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nilfs_ioctl_do_get_vinfo(struct the_nilfs *nilfs, __u64 *posp, int flags,
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void *buf, size_t size, size_t nmembs)
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{
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int ret;
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down_read(&nilfs->ns_segctor_sem);
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ret = nilfs_dat_get_vinfo(nilfs->ns_dat, buf, size, nmembs);
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up_read(&nilfs->ns_segctor_sem);
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return ret;
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}
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static ssize_t
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nilfs_ioctl_do_get_bdescs(struct the_nilfs *nilfs, __u64 *posp, int flags,
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void *buf, size_t size, size_t nmembs)
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{
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struct nilfs_bmap *bmap = NILFS_I(nilfs->ns_dat)->i_bmap;
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struct nilfs_bdesc *bdescs = buf;
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int ret, i;
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down_read(&nilfs->ns_segctor_sem);
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for (i = 0; i < nmembs; i++) {
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ret = nilfs_bmap_lookup_at_level(bmap,
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bdescs[i].bd_offset,
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bdescs[i].bd_level + 1,
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&bdescs[i].bd_blocknr);
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if (ret < 0) {
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if (ret != -ENOENT) {
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up_read(&nilfs->ns_segctor_sem);
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return ret;
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}
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bdescs[i].bd_blocknr = 0;
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}
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}
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up_read(&nilfs->ns_segctor_sem);
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return nmembs;
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}
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static int nilfs_ioctl_get_bdescs(struct inode *inode, struct file *filp,
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unsigned int cmd, void __user *argp)
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{
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struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
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struct nilfs_argv argv;
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int ret;
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if (copy_from_user(&argv, argp, sizeof(argv)))
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return -EFAULT;
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if (argv.v_size != sizeof(struct nilfs_bdesc))
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return -EINVAL;
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ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd),
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nilfs_ioctl_do_get_bdescs);
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if (ret < 0)
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return ret;
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if (copy_to_user(argp, &argv, sizeof(argv)))
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ret = -EFAULT;
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return ret;
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}
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static int nilfs_ioctl_move_inode_block(struct inode *inode,
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struct nilfs_vdesc *vdesc,
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struct list_head *buffers)
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{
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struct buffer_head *bh;
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int ret;
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if (vdesc->vd_flags == 0)
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ret = nilfs_gccache_submit_read_data(
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inode, vdesc->vd_offset, vdesc->vd_blocknr,
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vdesc->vd_vblocknr, &bh);
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else
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ret = nilfs_gccache_submit_read_node(
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inode, vdesc->vd_blocknr, vdesc->vd_vblocknr, &bh);
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if (unlikely(ret < 0)) {
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if (ret == -ENOENT)
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printk(KERN_CRIT
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"%s: invalid virtual block address (%s): "
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"ino=%llu, cno=%llu, offset=%llu, "
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"blocknr=%llu, vblocknr=%llu\n",
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__func__, vdesc->vd_flags ? "node" : "data",
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(unsigned long long)vdesc->vd_ino,
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(unsigned long long)vdesc->vd_cno,
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(unsigned long long)vdesc->vd_offset,
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(unsigned long long)vdesc->vd_blocknr,
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(unsigned long long)vdesc->vd_vblocknr);
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return ret;
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}
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if (unlikely(!list_empty(&bh->b_assoc_buffers))) {
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printk(KERN_CRIT "%s: conflicting %s buffer: ino=%llu, "
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"cno=%llu, offset=%llu, blocknr=%llu, vblocknr=%llu\n",
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__func__, vdesc->vd_flags ? "node" : "data",
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(unsigned long long)vdesc->vd_ino,
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(unsigned long long)vdesc->vd_cno,
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(unsigned long long)vdesc->vd_offset,
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(unsigned long long)vdesc->vd_blocknr,
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(unsigned long long)vdesc->vd_vblocknr);
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brelse(bh);
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return -EEXIST;
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}
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list_add_tail(&bh->b_assoc_buffers, buffers);
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return 0;
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}
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static int nilfs_ioctl_move_blocks(struct super_block *sb,
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struct nilfs_argv *argv, void *buf)
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{
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size_t nmembs = argv->v_nmembs;
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struct the_nilfs *nilfs = sb->s_fs_info;
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struct inode *inode;
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struct nilfs_vdesc *vdesc;
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struct buffer_head *bh, *n;
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LIST_HEAD(buffers);
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ino_t ino;
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__u64 cno;
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int i, ret;
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for (i = 0, vdesc = buf; i < nmembs; ) {
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ino = vdesc->vd_ino;
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cno = vdesc->vd_cno;
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inode = nilfs_iget_for_gc(sb, ino, cno);
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if (IS_ERR(inode)) {
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ret = PTR_ERR(inode);
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goto failed;
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}
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if (list_empty(&NILFS_I(inode)->i_dirty)) {
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/*
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* Add the inode to GC inode list. Garbage Collection
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* is serialized and no two processes manipulate the
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* list simultaneously.
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*/
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igrab(inode);
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list_add(&NILFS_I(inode)->i_dirty,
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&nilfs->ns_gc_inodes);
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}
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do {
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ret = nilfs_ioctl_move_inode_block(inode, vdesc,
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&buffers);
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if (unlikely(ret < 0)) {
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iput(inode);
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goto failed;
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}
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vdesc++;
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} while (++i < nmembs &&
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vdesc->vd_ino == ino && vdesc->vd_cno == cno);
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iput(inode); /* The inode still remains in GC inode list */
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}
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list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) {
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ret = nilfs_gccache_wait_and_mark_dirty(bh);
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if (unlikely(ret < 0)) {
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WARN_ON(ret == -EEXIST);
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goto failed;
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}
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list_del_init(&bh->b_assoc_buffers);
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brelse(bh);
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}
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return nmembs;
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failed:
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list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) {
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list_del_init(&bh->b_assoc_buffers);
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brelse(bh);
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}
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return ret;
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}
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static int nilfs_ioctl_delete_checkpoints(struct the_nilfs *nilfs,
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struct nilfs_argv *argv, void *buf)
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{
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size_t nmembs = argv->v_nmembs;
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struct inode *cpfile = nilfs->ns_cpfile;
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struct nilfs_period *periods = buf;
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int ret, i;
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for (i = 0; i < nmembs; i++) {
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ret = nilfs_cpfile_delete_checkpoints(
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cpfile, periods[i].p_start, periods[i].p_end);
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if (ret < 0)
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return ret;
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}
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return nmembs;
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}
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static int nilfs_ioctl_free_vblocknrs(struct the_nilfs *nilfs,
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struct nilfs_argv *argv, void *buf)
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{
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size_t nmembs = argv->v_nmembs;
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int ret;
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ret = nilfs_dat_freev(nilfs->ns_dat, buf, nmembs);
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|
|
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 nilfs_bmap *bmap = NILFS_I(nilfs->ns_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(nilfs->ns_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;
|
|
}
|
|
|
|
int nilfs_ioctl_prepare_clean_segments(struct the_nilfs *nilfs,
|
|
struct nilfs_argv *argv, void **kbufs)
|
|
{
|
|
const char *msg;
|
|
int ret;
|
|
|
|
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;
|
|
}
|
|
return 0;
|
|
|
|
failed:
|
|
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];
|
|
static const 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;
|
|
|
|
ret = mnt_want_write(filp->f_path.mnt);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = -EFAULT;
|
|
if (copy_from_user(argv, argp, sizeof(argv)))
|
|
goto out;
|
|
|
|
ret = -EINVAL;
|
|
nsegs = argv[4].v_nmembs;
|
|
if (argv[4].v_size != argsz[4])
|
|
goto out;
|
|
|
|
/*
|
|
* 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])) {
|
|
ret = PTR_ERR(kbufs[4]);
|
|
goto out;
|
|
}
|
|
nilfs = inode->i_sb->s_fs_info;
|
|
|
|
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;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* nilfs_ioctl_move_blocks() will call nilfs_iget_for_gc(),
|
|
* which will operates an inode list without blocking.
|
|
* To protect the list from concurrent operations,
|
|
* nilfs_ioctl_move_blocks should be atomic operation.
|
|
*/
|
|
if (test_and_set_bit(THE_NILFS_GC_RUNNING, &nilfs->ns_flags)) {
|
|
ret = -EBUSY;
|
|
goto out_free;
|
|
}
|
|
|
|
vfs_check_frozen(inode->i_sb, SB_FREEZE_WRITE);
|
|
|
|
ret = nilfs_ioctl_move_blocks(inode->i_sb, &argv[0], kbufs[0]);
|
|
if (ret < 0)
|
|
printk(KERN_ERR "NILFS: GC failed during preparation: "
|
|
"cannot read source blocks: err=%d\n", ret);
|
|
else
|
|
ret = nilfs_clean_segments(inode->i_sb, argv, kbufs);
|
|
|
|
nilfs_remove_all_gcinodes(nilfs);
|
|
clear_nilfs_gc_running(nilfs);
|
|
|
|
out_free:
|
|
while (--n >= 0)
|
|
vfree(kbufs[n]);
|
|
kfree(kbufs[4]);
|
|
out:
|
|
mnt_drop_write(filp->f_path.mnt);
|
|
return ret;
|
|
}
|
|
|
|
static int nilfs_ioctl_sync(struct inode *inode, struct file *filp,
|
|
unsigned int cmd, void __user *argp)
|
|
{
|
|
__u64 cno;
|
|
int ret;
|
|
struct the_nilfs *nilfs;
|
|
|
|
ret = nilfs_construct_segment(inode->i_sb);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (argp != NULL) {
|
|
nilfs = inode->i_sb->s_fs_info;
|
|
down_read(&nilfs->ns_segctor_sem);
|
|
cno = nilfs->ns_cno - 1;
|
|
up_read(&nilfs->ns_segctor_sem);
|
|
if (copy_to_user(argp, &cno, sizeof(cno)))
|
|
return -EFAULT;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int nilfs_ioctl_resize(struct inode *inode, struct file *filp,
|
|
void __user *argp)
|
|
{
|
|
__u64 newsize;
|
|
int ret = -EPERM;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
goto out;
|
|
|
|
ret = mnt_want_write(filp->f_path.mnt);
|
|
if (ret)
|
|
goto out;
|
|
|
|
ret = -EFAULT;
|
|
if (copy_from_user(&newsize, argp, sizeof(newsize)))
|
|
goto out_drop_write;
|
|
|
|
ret = nilfs_resize_fs(inode->i_sb, newsize);
|
|
|
|
out_drop_write:
|
|
mnt_drop_write(filp->f_path.mnt);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static int nilfs_ioctl_set_alloc_range(struct inode *inode, void __user *argp)
|
|
{
|
|
struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
|
|
__u64 range[2];
|
|
__u64 minseg, maxseg;
|
|
unsigned long segbytes;
|
|
int ret = -EPERM;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
goto out;
|
|
|
|
ret = -EFAULT;
|
|
if (copy_from_user(range, argp, sizeof(__u64[2])))
|
|
goto out;
|
|
|
|
ret = -ERANGE;
|
|
if (range[1] > i_size_read(inode->i_sb->s_bdev->bd_inode))
|
|
goto out;
|
|
|
|
segbytes = nilfs->ns_blocks_per_segment * nilfs->ns_blocksize;
|
|
|
|
minseg = range[0] + segbytes - 1;
|
|
do_div(minseg, segbytes);
|
|
maxseg = NILFS_SB2_OFFSET_BYTES(range[1]);
|
|
do_div(maxseg, segbytes);
|
|
maxseg--;
|
|
|
|
ret = nilfs_sufile_set_alloc_range(nilfs->ns_sufile, minseg, maxseg);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static int nilfs_ioctl_get_info(struct inode *inode, struct file *filp,
|
|
unsigned int cmd, void __user *argp,
|
|
size_t membsz,
|
|
ssize_t (*dofunc)(struct the_nilfs *,
|
|
__u64 *, int,
|
|
void *, size_t, size_t))
|
|
|
|
{
|
|
struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
|
|
struct nilfs_argv argv;
|
|
int ret;
|
|
|
|
if (copy_from_user(&argv, argp, sizeof(argv)))
|
|
return -EFAULT;
|
|
|
|
if (argv.v_size < membsz)
|
|
return -EINVAL;
|
|
|
|
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 FS_IOC_GETFLAGS:
|
|
return nilfs_ioctl_getflags(inode, argp);
|
|
case FS_IOC_SETFLAGS:
|
|
return nilfs_ioctl_setflags(inode, filp, argp);
|
|
case FS_IOC_GETVERSION:
|
|
return nilfs_ioctl_getversion(inode, argp);
|
|
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,
|
|
sizeof(struct nilfs_cpinfo),
|
|
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,
|
|
sizeof(struct nilfs_suinfo),
|
|
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,
|
|
sizeof(struct nilfs_vinfo),
|
|
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);
|
|
case NILFS_IOCTL_RESIZE:
|
|
return nilfs_ioctl_resize(inode, filp, argp);
|
|
case NILFS_IOCTL_SET_ALLOC_RANGE:
|
|
return nilfs_ioctl_set_alloc_range(inode, argp);
|
|
default:
|
|
return -ENOTTY;
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
long nilfs_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
|
|
{
|
|
switch (cmd) {
|
|
case FS_IOC32_GETFLAGS:
|
|
cmd = FS_IOC_GETFLAGS;
|
|
break;
|
|
case FS_IOC32_SETFLAGS:
|
|
cmd = FS_IOC_SETFLAGS;
|
|
break;
|
|
case FS_IOC32_GETVERSION:
|
|
cmd = FS_IOC_GETVERSION;
|
|
break;
|
|
default:
|
|
return -ENOIOCTLCMD;
|
|
}
|
|
return nilfs_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
|
|
}
|
|
#endif
|