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nilfs2: ioctl operations
This adds userland interface implemented with ioctl. Signed-off-by: Koji Sato <sato.koji@lab.ntt.co.jp> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Koji Sato
Linus Torvalds
parent
a3d93f709e
commit
7942b919f7
1 changed files with 941 additions and 0 deletions
941
fs/nilfs2/ioctl.c
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941
fs/nilfs2/ioctl.c
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/*
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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/smp_lock.h> /* lock_kernel(), unlock_kernel() */
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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/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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#define KMALLOC_SIZE_MIN 4096 /* 4KB */
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#define KMALLOC_SIZE_MAX 131072 /* 128 KB */
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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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int, int,
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void *, size_t, size_t))
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{
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void *buf;
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size_t ksize, maxmembs, total, n;
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ssize_t nr;
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int ret, i;
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if (argv->v_nmembs == 0)
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return 0;
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for (ksize = KMALLOC_SIZE_MAX; ksize >= KMALLOC_SIZE_MIN; ksize /= 2) {
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buf = kmalloc(ksize, GFP_NOFS);
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if (buf != NULL)
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break;
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}
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if (ksize < KMALLOC_SIZE_MIN)
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return -ENOMEM;
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maxmembs = ksize / argv->v_size;
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ret = 0;
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total = 0;
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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,
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(void __user *)argv->v_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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nr = (*dofunc)(nilfs, argv->v_index + i, argv->v_flags, buf,
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argv->v_size, 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(
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(void __user *)argv->v_base + argv->v_size * i,
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buf, 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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}
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argv->v_nmembs = total;
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kfree(buf);
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return ret;
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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 inode *cpfile = NILFS_SB(inode->i_sb)->s_nilfs->ns_cpfile;
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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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if (copy_from_user(&cpmode, argp, sizeof(cpmode)))
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return -EFAULT;
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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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cpfile, cpmode.cm_cno, cpmode.cm_mode);
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nilfs_transaction_end(inode->i_sb, !ret);
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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 inode *cpfile = NILFS_SB(inode->i_sb)->s_nilfs->ns_cpfile;
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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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if (copy_from_user(&cno, argp, sizeof(cno)))
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return -EFAULT;
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nilfs_transaction_begin(inode->i_sb, &ti, 0);
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ret = nilfs_cpfile_delete_checkpoint(cpfile, cno);
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nilfs_transaction_end(inode->i_sb, !ret);
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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, int index, int flags,
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void *buf, size_t size, size_t nmembs)
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{
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return nilfs_cpfile_get_cpinfo(nilfs->ns_cpfile, index, flags, buf,
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nmembs);
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}
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static int nilfs_ioctl_get_cpinfo(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 = NILFS_SB(inode->i_sb)->s_nilfs;
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struct nilfs_argv argv;
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struct nilfs_transaction_info ti;
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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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nilfs_transaction_begin(inode->i_sb, &ti, 0);
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ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd),
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nilfs_ioctl_do_get_cpinfo);
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nilfs_transaction_end(inode->i_sb, 0);
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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_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 inode *cpfile = NILFS_SB(inode->i_sb)->s_nilfs->ns_cpfile;
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struct nilfs_cpstat cpstat;
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struct nilfs_transaction_info ti;
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int ret;
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nilfs_transaction_begin(inode->i_sb, &ti, 0);
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ret = nilfs_cpfile_get_stat(cpfile, &cpstat);
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nilfs_transaction_end(inode->i_sb, 0);
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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, int index, int flags,
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void *buf, size_t size, size_t nmembs)
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{
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return nilfs_sufile_get_suinfo(nilfs->ns_sufile, index, buf, nmembs);
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}
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static int nilfs_ioctl_get_suinfo(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 = NILFS_SB(inode->i_sb)->s_nilfs;
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struct nilfs_argv argv;
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struct nilfs_transaction_info ti;
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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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nilfs_transaction_begin(inode->i_sb, &ti, 0);
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ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd),
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nilfs_ioctl_do_get_suinfo);
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nilfs_transaction_end(inode->i_sb, 0);
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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_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 inode *sufile = NILFS_SB(inode->i_sb)->s_nilfs->ns_sufile;
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struct nilfs_sustat sustat;
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struct nilfs_transaction_info ti;
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int ret;
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nilfs_transaction_begin(inode->i_sb, &ti, 0);
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ret = nilfs_sufile_get_stat(sufile, &sustat);
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nilfs_transaction_end(inode->i_sb, 0);
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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, int index, int flags,
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void *buf, size_t size, size_t nmembs)
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{
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return nilfs_dat_get_vinfo(nilfs_dat_inode(nilfs), buf, nmembs);
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}
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static int nilfs_ioctl_get_vinfo(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 = NILFS_SB(inode->i_sb)->s_nilfs;
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struct nilfs_argv argv;
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struct nilfs_transaction_info ti;
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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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nilfs_transaction_begin(inode->i_sb, &ti, 0);
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ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd),
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nilfs_ioctl_do_get_vinfo);
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nilfs_transaction_end(inode->i_sb, 0);
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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 ssize_t
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nilfs_ioctl_do_get_bdescs(struct the_nilfs *nilfs, int index, int flags,
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void *buf, size_t size, size_t nmembs)
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{
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struct inode *dat = nilfs_dat_inode(nilfs);
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struct nilfs_bmap *bmap = NILFS_I(dat)->i_bmap;
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struct nilfs_bdesc *bdescs = buf;
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int ret, i;
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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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return ret;
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bdescs[i].bd_blocknr = 0;
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}
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}
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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 = NILFS_SB(inode->i_sb)->s_nilfs;
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struct nilfs_argv argv;
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struct nilfs_transaction_info ti;
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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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nilfs_transaction_begin(inode->i_sb, &ti, 0);
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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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nilfs_transaction_end(inode->i_sb, 0);
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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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bh->b_private = vdesc;
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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 ssize_t
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nilfs_ioctl_do_move_blocks(struct the_nilfs *nilfs, int index, int flags,
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void *buf, size_t size, size_t nmembs)
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{
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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_gc_iget(nilfs, ino, cno);
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if (unlikely(inode == NULL)) {
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ret = -ENOMEM;
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goto failed;
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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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goto failed;
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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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}
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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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if (ret == -EEXIST) {
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vdesc = bh->b_private;
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printk(KERN_CRIT
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"%s: conflicting %s buffer: "
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"ino=%llu, cno=%llu, offset=%llu, "
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"blocknr=%llu, vblocknr=%llu\n",
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__func__,
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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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}
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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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bh->b_private = NULL;
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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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bh->b_private = NULL;
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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 inline int nilfs_ioctl_move_blocks(struct the_nilfs *nilfs,
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struct nilfs_argv *argv,
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int dir)
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{
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return nilfs_ioctl_wrap_copy(nilfs, argv, dir,
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nilfs_ioctl_do_move_blocks);
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}
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static ssize_t
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nilfs_ioctl_do_delete_checkpoints(struct the_nilfs *nilfs, int index,
|
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int flags, void *buf, size_t size,
|
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size_t nmembs)
|
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{
|
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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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|
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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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return nmembs;
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||||
}
|
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static inline int nilfs_ioctl_delete_checkpoints(struct the_nilfs *nilfs,
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struct nilfs_argv *argv,
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int dir)
|
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{
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return nilfs_ioctl_wrap_copy(nilfs, argv, dir,
|
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nilfs_ioctl_do_delete_checkpoints);
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}
|
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static ssize_t
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nilfs_ioctl_do_free_vblocknrs(struct the_nilfs *nilfs, int index, int flags,
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void *buf, size_t size, size_t nmembs)
|
||||
{
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int ret = nilfs_dat_freev(nilfs_dat_inode(nilfs), buf, nmembs);
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||||
|
||||
return (ret < 0) ? ret : nmembs;
|
||||
}
|
||||
|
||||
static inline int nilfs_ioctl_free_vblocknrs(struct the_nilfs *nilfs,
|
||||
struct nilfs_argv *argv,
|
||||
int dir)
|
||||
{
|
||||
return nilfs_ioctl_wrap_copy(nilfs, argv, dir,
|
||||
nilfs_ioctl_do_free_vblocknrs);
|
||||
}
|
||||
|
||||
static ssize_t
|
||||
nilfs_ioctl_do_mark_blocks_dirty(struct the_nilfs *nilfs, int index, 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;
|
||||
|
||||
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) {
|
||||
BUG_ON(ret == -ENOENT);
|
||||
return ret;
|
||||
}
|
||||
} else {
|
||||
ret = nilfs_bmap_mark(bmap, bdescs[i].bd_offset,
|
||||
bdescs[i].bd_level);
|
||||
if (ret < 0) {
|
||||
BUG_ON(ret == -ENOENT);
|
||||
return ret;
|
||||
}
|
||||
}
|
||||
}
|
||||
return nmembs;
|
||||
}
|
||||
|
||||
static inline int nilfs_ioctl_mark_blocks_dirty(struct the_nilfs *nilfs,
|
||||
struct nilfs_argv *argv,
|
||||
int dir)
|
||||
{
|
||||
return nilfs_ioctl_wrap_copy(nilfs, argv, dir,
|
||||
nilfs_ioctl_do_mark_blocks_dirty);
|
||||
}
|
||||
|
||||
static ssize_t
|
||||
nilfs_ioctl_do_free_segments(struct the_nilfs *nilfs, int index, int flags,
|
||||
void *buf, size_t size, size_t nmembs)
|
||||
{
|
||||
struct nilfs_sb_info *sbi = nilfs_get_writer(nilfs);
|
||||
int ret;
|
||||
|
||||
BUG_ON(!sbi);
|
||||
ret = nilfs_segctor_add_segments_to_be_freed(
|
||||
NILFS_SC(sbi), buf, nmembs);
|
||||
nilfs_put_writer(nilfs);
|
||||
|
||||
return (ret < 0) ? ret : nmembs;
|
||||
}
|
||||
|
||||
static inline int nilfs_ioctl_free_segments(struct the_nilfs *nilfs,
|
||||
struct nilfs_argv *argv,
|
||||
int dir)
|
||||
{
|
||||
return nilfs_ioctl_wrap_copy(nilfs, argv, dir,
|
||||
nilfs_ioctl_do_free_segments);
|
||||
}
|
||||
|
||||
int nilfs_ioctl_prepare_clean_segments(struct the_nilfs *nilfs,
|
||||
void __user *argp)
|
||||
{
|
||||
struct nilfs_argv argv[5];
|
||||
int dir, ret;
|
||||
|
||||
if (copy_from_user(argv, argp, sizeof(argv)))
|
||||
return -EFAULT;
|
||||
|
||||
dir = _IOC_WRITE;
|
||||
ret = nilfs_ioctl_move_blocks(nilfs, &argv[0], dir);
|
||||
if (ret < 0)
|
||||
goto out_move_blks;
|
||||
ret = nilfs_ioctl_delete_checkpoints(nilfs, &argv[1], dir);
|
||||
if (ret < 0)
|
||||
goto out_del_cps;
|
||||
ret = nilfs_ioctl_free_vblocknrs(nilfs, &argv[2], dir);
|
||||
if (ret < 0)
|
||||
goto out_free_vbns;
|
||||
ret = nilfs_ioctl_mark_blocks_dirty(nilfs, &argv[3], dir);
|
||||
if (ret < 0)
|
||||
goto out_free_vbns;
|
||||
ret = nilfs_ioctl_free_segments(nilfs, &argv[4], dir);
|
||||
if (ret < 0)
|
||||
goto out_free_segs;
|
||||
|
||||
return 0;
|
||||
|
||||
out_free_segs:
|
||||
BUG(); /* XXX: not implemented yet */
|
||||
out_free_vbns:
|
||||
BUG();/* XXX: not implemented yet */
|
||||
out_del_cps:
|
||||
BUG();/* XXX: not implemented yet */
|
||||
out_move_blks:
|
||||
nilfs_remove_all_gcinode(nilfs);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int nilfs_ioctl_clean_segments(struct inode *inode, struct file *filp,
|
||||
unsigned int cmd, void __user *argp)
|
||||
{
|
||||
int ret;
|
||||
|
||||
if (!capable(CAP_SYS_ADMIN))
|
||||
return -EPERM;
|
||||
|
||||
ret = nilfs_clean_segments(inode->i_sb, argp);
|
||||
clear_nilfs_cond_nongc_write(NILFS_SB(inode->i_sb)->s_nilfs);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int nilfs_ioctl_test_cond(struct the_nilfs *nilfs, int cond)
|
||||
{
|
||||
return (cond & NILFS_TIMEDWAIT_SEG_WRITE) &&
|
||||
nilfs_cond_nongc_write(nilfs);
|
||||
}
|
||||
|
||||
static void nilfs_ioctl_clear_cond(struct the_nilfs *nilfs, int cond)
|
||||
{
|
||||
if (cond & NILFS_TIMEDWAIT_SEG_WRITE)
|
||||
clear_nilfs_cond_nongc_write(nilfs);
|
||||
}
|
||||
|
||||
static int nilfs_ioctl_timedwait(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_wait_cond wc;
|
||||
long ret;
|
||||
|
||||
if (!capable(CAP_SYS_ADMIN))
|
||||
return -EPERM;
|
||||
if (copy_from_user(&wc, argp, sizeof(wc)))
|
||||
return -EFAULT;
|
||||
|
||||
unlock_kernel();
|
||||
ret = wc.wc_flags ?
|
||||
wait_event_interruptible_timeout(
|
||||
nilfs->ns_cleanerd_wq,
|
||||
nilfs_ioctl_test_cond(nilfs, wc.wc_cond),
|
||||
timespec_to_jiffies(&wc.wc_timeout)) :
|
||||
wait_event_interruptible(
|
||||
nilfs->ns_cleanerd_wq,
|
||||
nilfs_ioctl_test_cond(nilfs, wc.wc_cond));
|
||||
lock_kernel();
|
||||
nilfs_ioctl_clear_cond(nilfs, wc.wc_cond);
|
||||
|
||||
if (ret > 0) {
|
||||
jiffies_to_timespec(ret, &wc.wc_timeout);
|
||||
if (copy_to_user(argp, &wc, sizeof(wc)))
|
||||
return -EFAULT;
|
||||
return 0;
|
||||
}
|
||||
if (ret != 0)
|
||||
return -EINTR;
|
||||
|
||||
return wc.wc_flags ? -ETIME : 0;
|
||||
}
|
||||
|
||||
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;
|
||||
}
|
||||
|
||||
int nilfs_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
|
||||
unsigned long arg)
|
||||
{
|
||||
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_cpinfo(inode, filp, cmd, argp);
|
||||
case NILFS_IOCTL_GET_CPSTAT:
|
||||
return nilfs_ioctl_get_cpstat(inode, filp, cmd, argp);
|
||||
case NILFS_IOCTL_GET_SUINFO:
|
||||
return nilfs_ioctl_get_suinfo(inode, filp, cmd, argp);
|
||||
case NILFS_IOCTL_GET_SUSTAT:
|
||||
return nilfs_ioctl_get_sustat(inode, filp, cmd, argp);
|
||||
case NILFS_IOCTL_GET_VINFO:
|
||||
/* XXX: rename to ??? */
|
||||
return nilfs_ioctl_get_vinfo(inode, filp, cmd, argp);
|
||||
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_TIMEDWAIT:
|
||||
return nilfs_ioctl_timedwait(inode, filp, cmd, argp);
|
||||
case NILFS_IOCTL_SYNC:
|
||||
return nilfs_ioctl_sync(inode, filp, cmd, argp);
|
||||
default:
|
||||
return -ENOTTY;
|
||||
}
|
||||
}
|
||||
|
||||
/* compat_ioctl */
|
||||
#ifdef CONFIG_COMPAT
|
||||
#include <linux/compat.h>
|
||||
|
||||
static int nilfs_compat_locked_ioctl(struct inode *inode, struct file *filp,
|
||||
unsigned int cmd, unsigned long arg)
|
||||
{
|
||||
int ret;
|
||||
|
||||
lock_kernel();
|
||||
ret = nilfs_ioctl(inode, filp, cmd, arg);
|
||||
unlock_kernel();
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int
|
||||
nilfs_compat_ioctl_uargv32_to_uargv(struct nilfs_argv32 __user *uargv32,
|
||||
struct nilfs_argv __user *uargv)
|
||||
{
|
||||
compat_uptr_t base;
|
||||
compat_size_t nmembs, size;
|
||||
compat_int_t index, flags;
|
||||
|
||||
if (get_user(base, &uargv32->v_base) ||
|
||||
put_user(compat_ptr(base), &uargv->v_base) ||
|
||||
get_user(nmembs, &uargv32->v_nmembs) ||
|
||||
put_user(nmembs, &uargv->v_nmembs) ||
|
||||
get_user(size, &uargv32->v_size) ||
|
||||
put_user(size, &uargv->v_size) ||
|
||||
get_user(index, &uargv32->v_index) ||
|
||||
put_user(index, &uargv->v_index) ||
|
||||
get_user(flags, &uargv32->v_flags) ||
|
||||
put_user(flags, &uargv->v_flags))
|
||||
return -EFAULT;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
nilfs_compat_ioctl_uargv_to_uargv32(struct nilfs_argv __user *uargv,
|
||||
struct nilfs_argv32 __user *uargv32)
|
||||
{
|
||||
size_t nmembs;
|
||||
|
||||
if (get_user(nmembs, &uargv->v_nmembs) ||
|
||||
put_user(nmembs, &uargv32->v_nmembs))
|
||||
return -EFAULT;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
nilfs_compat_ioctl_get_by_argv(struct inode *inode, struct file *filp,
|
||||
unsigned int cmd, unsigned long arg)
|
||||
{
|
||||
struct nilfs_argv __user *uargv;
|
||||
struct nilfs_argv32 __user *uargv32;
|
||||
int ret;
|
||||
|
||||
uargv = compat_alloc_user_space(sizeof(struct nilfs_argv));
|
||||
uargv32 = compat_ptr(arg);
|
||||
ret = nilfs_compat_ioctl_uargv32_to_uargv(uargv32, uargv);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
ret = nilfs_compat_locked_ioctl(inode, filp, cmd, (unsigned long)uargv);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
return nilfs_compat_ioctl_uargv_to_uargv32(uargv, uargv32);
|
||||
}
|
||||
|
||||
static int
|
||||
nilfs_compat_ioctl_change_cpmode(struct inode *inode, struct file *filp,
|
||||
unsigned int cmd, unsigned long arg)
|
||||
{
|
||||
struct nilfs_cpmode __user *ucpmode;
|
||||
struct nilfs_cpmode32 __user *ucpmode32;
|
||||
int mode;
|
||||
|
||||
ucpmode = compat_alloc_user_space(sizeof(struct nilfs_cpmode));
|
||||
ucpmode32 = compat_ptr(arg);
|
||||
if (copy_in_user(&ucpmode->cm_cno, &ucpmode32->cm_cno,
|
||||
sizeof(__u64)) ||
|
||||
get_user(mode, &ucpmode32->cm_mode) ||
|
||||
put_user(mode, &ucpmode->cm_mode))
|
||||
return -EFAULT;
|
||||
|
||||
return nilfs_compat_locked_ioctl(
|
||||
inode, filp, cmd, (unsigned long)ucpmode);
|
||||
}
|
||||
|
||||
|
||||
static inline int
|
||||
nilfs_compat_ioctl_delete_checkpoint(struct inode *inode, struct file *filp,
|
||||
unsigned int cmd, unsigned long arg)
|
||||
{
|
||||
return nilfs_compat_locked_ioctl(inode, filp, cmd, arg);
|
||||
}
|
||||
|
||||
static inline int
|
||||
nilfs_compat_ioctl_get_cpinfo(struct inode *inode, struct file *filp,
|
||||
unsigned int cmd, unsigned long arg)
|
||||
{
|
||||
return nilfs_compat_ioctl_get_by_argv(inode, filp, cmd, arg);
|
||||
}
|
||||
|
||||
static inline int
|
||||
nilfs_compat_ioctl_get_cpstat(struct inode *inode, struct file *filp,
|
||||
unsigned int cmd, unsigned long arg)
|
||||
{
|
||||
return nilfs_compat_locked_ioctl(inode, filp, cmd, arg);
|
||||
}
|
||||
|
||||
static inline int
|
||||
nilfs_compat_ioctl_get_suinfo(struct inode *inode, struct file *filp,
|
||||
unsigned int cmd, unsigned long arg)
|
||||
{
|
||||
return nilfs_compat_ioctl_get_by_argv(inode, filp, cmd, arg);
|
||||
}
|
||||
|
||||
static int
|
||||
nilfs_compat_ioctl_get_sustat(struct inode *inode, struct file *filp,
|
||||
unsigned int cmd, unsigned long arg)
|
||||
{
|
||||
struct nilfs_sustat __user *usustat;
|
||||
struct nilfs_sustat32 __user *usustat32;
|
||||
time_t ctime, nongc_ctime;
|
||||
int ret;
|
||||
|
||||
usustat = compat_alloc_user_space(sizeof(struct nilfs_sustat));
|
||||
ret = nilfs_compat_locked_ioctl(inode, filp, cmd,
|
||||
(unsigned long)usustat);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
usustat32 = compat_ptr(arg);
|
||||
if (copy_in_user(&usustat32->ss_nsegs, &usustat->ss_nsegs,
|
||||
sizeof(__u64)) ||
|
||||
copy_in_user(&usustat32->ss_ncleansegs, &usustat->ss_ncleansegs,
|
||||
sizeof(__u64)) ||
|
||||
copy_in_user(&usustat32->ss_ndirtysegs, &usustat->ss_ndirtysegs,
|
||||
sizeof(__u64)) ||
|
||||
get_user(ctime, &usustat->ss_ctime) ||
|
||||
put_user(ctime, &usustat32->ss_ctime) ||
|
||||
get_user(nongc_ctime, &usustat->ss_nongc_ctime) ||
|
||||
put_user(nongc_ctime, &usustat32->ss_nongc_ctime))
|
||||
return -EFAULT;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline int
|
||||
nilfs_compat_ioctl_get_vinfo(struct inode *inode, struct file *filp,
|
||||
unsigned int cmd, unsigned long arg)
|
||||
{
|
||||
return nilfs_compat_ioctl_get_by_argv(inode, filp, cmd, arg);
|
||||
}
|
||||
|
||||
static inline int
|
||||
nilfs_compat_ioctl_get_bdescs(struct inode *inode, struct file *filp,
|
||||
unsigned int cmd, unsigned long arg)
|
||||
{
|
||||
return nilfs_compat_ioctl_get_by_argv(inode, filp, cmd, arg);
|
||||
}
|
||||
|
||||
static int
|
||||
nilfs_compat_ioctl_clean_segments(struct inode *inode, struct file *filp,
|
||||
unsigned int cmd, unsigned long arg)
|
||||
{
|
||||
struct nilfs_argv __user *uargv;
|
||||
struct nilfs_argv32 __user *uargv32;
|
||||
int i, ret;
|
||||
|
||||
uargv = compat_alloc_user_space(sizeof(struct nilfs_argv) * 5);
|
||||
uargv32 = compat_ptr(arg);
|
||||
for (i = 0; i < 5; i++) {
|
||||
ret = nilfs_compat_ioctl_uargv32_to_uargv(&uargv32[i],
|
||||
&uargv[i]);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
}
|
||||
return nilfs_compat_locked_ioctl(
|
||||
inode, filp, cmd, (unsigned long)uargv);
|
||||
}
|
||||
|
||||
static int
|
||||
nilfs_compat_ioctl_timedwait(struct inode *inode, struct file *filp,
|
||||
unsigned int cmd, unsigned long arg)
|
||||
{
|
||||
struct nilfs_wait_cond __user *uwcond;
|
||||
struct nilfs_wait_cond32 __user *uwcond32;
|
||||
struct timespec ts;
|
||||
int cond, flags, ret;
|
||||
|
||||
uwcond = compat_alloc_user_space(sizeof(struct nilfs_wait_cond));
|
||||
uwcond32 = compat_ptr(arg);
|
||||
if (get_user(cond, &uwcond32->wc_cond) ||
|
||||
put_user(cond, &uwcond->wc_cond) ||
|
||||
get_user(flags, &uwcond32->wc_flags) ||
|
||||
put_user(flags, &uwcond->wc_flags) ||
|
||||
get_user(ts.tv_sec, &uwcond32->wc_timeout.tv_sec) ||
|
||||
get_user(ts.tv_nsec, &uwcond32->wc_timeout.tv_nsec) ||
|
||||
put_user(ts.tv_sec, &uwcond->wc_timeout.tv_sec) ||
|
||||
put_user(ts.tv_nsec, &uwcond->wc_timeout.tv_nsec))
|
||||
return -EFAULT;
|
||||
|
||||
ret = nilfs_compat_locked_ioctl(inode, filp, cmd,
|
||||
(unsigned long)uwcond);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
if (get_user(ts.tv_sec, &uwcond->wc_timeout.tv_sec) ||
|
||||
get_user(ts.tv_nsec, &uwcond->wc_timeout.tv_nsec) ||
|
||||
put_user(ts.tv_sec, &uwcond32->wc_timeout.tv_sec) ||
|
||||
put_user(ts.tv_nsec, &uwcond32->wc_timeout.tv_nsec))
|
||||
return -EFAULT;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int nilfs_compat_ioctl_sync(struct inode *inode, struct file *filp,
|
||||
unsigned int cmd, unsigned long arg)
|
||||
{
|
||||
return nilfs_compat_locked_ioctl(inode, filp, cmd, arg);
|
||||
}
|
||||
|
||||
long nilfs_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
|
||||
{
|
||||
struct inode *inode = filp->f_dentry->d_inode;
|
||||
|
||||
switch (cmd) {
|
||||
case NILFS_IOCTL32_CHANGE_CPMODE:
|
||||
return nilfs_compat_ioctl_change_cpmode(
|
||||
inode, filp, NILFS_IOCTL_CHANGE_CPMODE, arg);
|
||||
case NILFS_IOCTL_DELETE_CHECKPOINT:
|
||||
return nilfs_compat_ioctl_delete_checkpoint(
|
||||
inode, filp, cmd, arg);
|
||||
case NILFS_IOCTL32_GET_CPINFO:
|
||||
return nilfs_compat_ioctl_get_cpinfo(
|
||||
inode, filp, NILFS_IOCTL_GET_CPINFO, arg);
|
||||
case NILFS_IOCTL_GET_CPSTAT:
|
||||
return nilfs_compat_ioctl_get_cpstat(inode, filp, cmd, arg);
|
||||
case NILFS_IOCTL32_GET_SUINFO:
|
||||
return nilfs_compat_ioctl_get_suinfo(
|
||||
inode, filp, NILFS_IOCTL_GET_SUINFO, arg);
|
||||
case NILFS_IOCTL32_GET_SUSTAT:
|
||||
return nilfs_compat_ioctl_get_sustat(
|
||||
inode, filp, NILFS_IOCTL_GET_SUSTAT, arg);
|
||||
case NILFS_IOCTL32_GET_VINFO:
|
||||
return nilfs_compat_ioctl_get_vinfo(
|
||||
inode, filp, NILFS_IOCTL_GET_VINFO, arg);
|
||||
case NILFS_IOCTL32_GET_BDESCS:
|
||||
return nilfs_compat_ioctl_get_bdescs(
|
||||
inode, filp, NILFS_IOCTL_GET_BDESCS, arg);
|
||||
case NILFS_IOCTL32_CLEAN_SEGMENTS:
|
||||
return nilfs_compat_ioctl_clean_segments(
|
||||
inode, filp, NILFS_IOCTL_CLEAN_SEGMENTS, arg);
|
||||
case NILFS_IOCTL32_TIMEDWAIT:
|
||||
return nilfs_compat_ioctl_timedwait(
|
||||
inode, filp, NILFS_IOCTL_TIMEDWAIT, arg);
|
||||
case NILFS_IOCTL_SYNC:
|
||||
return nilfs_compat_ioctl_sync(inode, filp, cmd, arg);
|
||||
default:
|
||||
return -ENOIOCTLCMD;
|
||||
}
|
||||
}
|
||||
#endif
|
||||
Loading…
Reference in a new issue