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@@ -771,6 +771,46 @@ void kill_litter_super(struct super_block *sb)
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EXPORT_SYMBOL(kill_litter_super);
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+static int ns_test_super(struct super_block *sb, void *data)
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+{
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+ return sb->s_fs_info == data;
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+}
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+
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+static int ns_set_super(struct super_block *sb, void *data)
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+{
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+ sb->s_fs_info = data;
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+ return set_anon_super(sb, NULL);
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+}
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+
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+int get_sb_ns(struct file_system_type *fs_type, int flags, void *data,
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+ int (*fill_super)(struct super_block *, void *, int),
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+ struct vfsmount *mnt)
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+{
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+ struct super_block *sb;
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+
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+ sb = sget(fs_type, ns_test_super, ns_set_super, data);
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+ if (IS_ERR(sb))
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+ return PTR_ERR(sb);
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+
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+ if (!sb->s_root) {
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+ int err;
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+ sb->s_flags = flags;
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+ err = fill_super(sb, data, flags & MS_SILENT ? 1 : 0);
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+ if (err) {
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+ up_write(&sb->s_umount);
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+ deactivate_super(sb);
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+ return err;
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+ }
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+
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+ sb->s_flags |= MS_ACTIVE;
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+ }
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+
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+ simple_set_mnt(mnt, sb);
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+ return 0;
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+}
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+
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+EXPORT_SYMBOL(get_sb_ns);
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+
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#ifdef CONFIG_BLOCK
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static int set_bdev_super(struct super_block *s, void *data)
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{
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