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ANDROID: sdcardfs: use mount_nodev and fix a issue in sdcardfs_kill_sb

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Use the VFS mount_nodev instead of customized mount_nodev_with_options
and fix generic_shutdown_super to kill_anon_super because of set_anon_super

Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
Change-Id: Ibe46647aa2ce49d79291aa9d0295e9625cfccd80
This commit is contained in:
Gao Xiang 2017-05-09 12:30:56 +08:00 committed by Amit Pundir
parent fda2dedcde
commit 2451d7f28d
1 changed files with 20 additions and 27 deletions
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47
fs/sdcardfs/main.c
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@ -364,41 +364,34 @@ static int sdcardfs_read_super(struct vfsmount *mnt, struct super_block *sb,
return err;
}
/* A feature which supports mount_nodev() with options */
static struct dentry *mount_nodev_with_options(struct vfsmount *mnt,
struct file_system_type *fs_type, int flags,
const char *dev_name, void *data,
int (*fill_super)(struct vfsmount *, struct super_block *,
const char *, void *, int))
struct sdcardfs_mount_private {
struct vfsmount *mnt;
const char *dev_name;
void *raw_data;
};
static int __sdcardfs_fill_super(
struct super_block *sb,
void *_priv, int silent)
{
int error;
struct super_block *s = sget(fs_type, NULL, set_anon_super, flags, NULL);
struct sdcardfs_mount_private *priv = _priv;
if (IS_ERR(s))
return ERR_CAST(s);
s->s_flags = flags;
error = fill_super(mnt, s, dev_name, data, flags & MS_SILENT ? 1 : 0);
if (error) {
deactivate_locked_super(s);
return ERR_PTR(error);
}
s->s_flags |= MS_ACTIVE;
return dget(s->s_root);
return sdcardfs_read_super(priv->mnt,
sb, priv->dev_name, priv->raw_data, silent);
}
static struct dentry *sdcardfs_mount(struct vfsmount *mnt,
struct file_system_type *fs_type, int flags,
const char *dev_name, void *raw_data)
{
/*
* dev_name is a lower_path_name,
* raw_data is a option string.
*/
return mount_nodev_with_options(mnt, fs_type, flags, dev_name,
raw_data, sdcardfs_read_super);
struct sdcardfs_mount_private priv = {
.mnt = mnt,
.dev_name = dev_name,
.raw_data = raw_data
};
return mount_nodev(fs_type, flags,
&priv, __sdcardfs_fill_super);
}
static struct dentry *sdcardfs_mount_wrn(struct file_system_type *fs_type,
@ -423,7 +416,7 @@ void sdcardfs_kill_sb(struct super_block *sb)
list_del(&sbi->list);
mutex_unlock(&sdcardfs_super_list_lock);
}
generic_shutdown_super(sb);
kill_anon_super(sb);
}
static struct file_system_type sdcardfs_fs_type = {