Commit 52656e6c authored by Jaegeuk Kim's avatar Jaegeuk Kim
Browse files

f2fs: clean up f2fs_ioctl functions



This patch cleans up f2fs_ioctl functions for better readability.
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 8a21984d
......@@ -805,90 +805,102 @@ static inline __u32 f2fs_mask_flags(umode_t mode, __u32 flags)
return flags & F2FS_OTHER_FLMASK;
}
long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
static int f2fs_ioc_getflags(struct file *filp, unsigned long arg)
{
struct inode *inode = file_inode(filp);
struct f2fs_inode_info *fi = F2FS_I(inode);
unsigned int flags;
int ret;
unsigned int flags = fi->i_flags & FS_FL_USER_VISIBLE;
return put_user(flags, (int __user *)arg);
}
switch (cmd) {
case F2FS_IOC_GETFLAGS:
flags = fi->i_flags & FS_FL_USER_VISIBLE;
return put_user(flags, (int __user *) arg);
case F2FS_IOC_SETFLAGS:
{
unsigned int oldflags;
static int f2fs_ioc_setflags(struct file *filp, unsigned long arg)
{
struct inode *inode = file_inode(filp);
struct f2fs_inode_info *fi = F2FS_I(inode);
unsigned int flags = fi->i_flags & FS_FL_USER_VISIBLE;
unsigned int oldflags;
int ret;
ret = mnt_want_write_file(filp);
if (ret)
return ret;
ret = mnt_want_write_file(filp);
if (ret)
return ret;
if (!inode_owner_or_capable(inode)) {
ret = -EACCES;
goto out;
}
if (!inode_owner_or_capable(inode)) {
ret = -EACCES;
goto out;
}
if (get_user(flags, (int __user *) arg)) {
ret = -EFAULT;
goto out;
}
if (get_user(flags, (int __user *)arg)) {
ret = -EFAULT;
goto out;
}
flags = f2fs_mask_flags(inode->i_mode, flags);
flags = f2fs_mask_flags(inode->i_mode, flags);
mutex_lock(&inode->i_mutex);
mutex_lock(&inode->i_mutex);
oldflags = fi->i_flags;
oldflags = fi->i_flags;
if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) {
if (!capable(CAP_LINUX_IMMUTABLE)) {
mutex_unlock(&inode->i_mutex);
ret = -EPERM;
goto out;
}
if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) {
if (!capable(CAP_LINUX_IMMUTABLE)) {
mutex_unlock(&inode->i_mutex);
ret = -EPERM;
goto out;
}
}
flags = flags & FS_FL_USER_MODIFIABLE;
flags |= oldflags & ~FS_FL_USER_MODIFIABLE;
fi->i_flags = flags;
mutex_unlock(&inode->i_mutex);
flags = flags & FS_FL_USER_MODIFIABLE;
flags |= oldflags & ~FS_FL_USER_MODIFIABLE;
fi->i_flags = flags;
mutex_unlock(&inode->i_mutex);
f2fs_set_inode_flags(inode);
inode->i_ctime = CURRENT_TIME;
mark_inode_dirty(inode);
f2fs_set_inode_flags(inode);
inode->i_ctime = CURRENT_TIME;
mark_inode_dirty(inode);
out:
mnt_drop_write_file(filp);
return ret;
}
case FITRIM:
{
struct super_block *sb = inode->i_sb;
struct request_queue *q = bdev_get_queue(sb->s_bdev);
struct fstrim_range range;
int ret = 0;
mnt_drop_write_file(filp);
return ret;
}
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
static int f2fs_ioc_fitrim(struct file *filp, unsigned long arg)
{
struct inode *inode = file_inode(filp);
struct super_block *sb = inode->i_sb;
struct request_queue *q = bdev_get_queue(sb->s_bdev);
struct fstrim_range range;
int ret;
if (!blk_queue_discard(q))
return -EOPNOTSUPP;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (copy_from_user(&range, (struct fstrim_range __user *)arg,
sizeof(range)))
return -EFAULT;
if (!blk_queue_discard(q))
return -EOPNOTSUPP;
range.minlen = max((unsigned int)range.minlen,
q->limits.discard_granularity);
ret = f2fs_trim_fs(F2FS_SB(sb), &range);
if (ret < 0)
return ret;
if (copy_from_user(&range, (struct fstrim_range __user *)arg,
sizeof(range)))
return -EFAULT;
if (copy_to_user((struct fstrim_range __user *)arg, &range,
sizeof(range)))
return -EFAULT;
range.minlen = max((unsigned int)range.minlen,
q->limits.discard_granularity);
ret = f2fs_trim_fs(F2FS_SB(sb), &range);
if (ret < 0)
return ret;
return 0;
}
if (copy_to_user((struct fstrim_range __user *)arg, &range,
sizeof(range)))
return -EFAULT;
return 0;
}
long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
switch (cmd) {
case F2FS_IOC_GETFLAGS:
return f2fs_ioc_getflags(filp, arg);
case F2FS_IOC_SETFLAGS:
return f2fs_ioc_setflags(filp, arg);
case FITRIM:
return f2fs_ioc_fitrim(filp, arg);
default:
return -ENOTTY;
}
......
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