itop4412学习-超级块操作

1. 先看下超级块支持的函数列表，文件路径4412_SCP精英版Android源码iTop4412_Kernel_3.0_20140521iTop4412_Kernel_3.0includelinux

struct super_operations {
       struct inode *(*alloc_inode)(struct super_block *sb);
    void (*destroy_inode)(struct inode *);

       void (*dirty_inode) (struct inode *, int flags);
    int (*write_inode) (struct inode *, struct writeback_control *wbc);
    int (*drop_inode) (struct inode *);
    void (*evict_inode) (struct inode *);
    void (*put_super) (struct super_block *);
    void (*write_super) (struct super_block *);
    int (*sync_fs)(struct super_block *sb, int wait);
    int (*freeze_fs) (struct super_block *);
    int (*unfreeze_fs) (struct super_block *);
    int (*statfs) (struct dentry *, struct kstatfs *);
    int (*remount_fs) (struct super_block *, int *, char *);
    void (*umount_begin) (struct super_block *);

    int (*show_options)(struct seq_file *, struct vfsmount *);
    int (*show_devname)(struct seq_file *, struct vfsmount *);
    int (*show_path)(struct seq_file *, struct vfsmount *);
    int (*show_stats)(struct seq_file *, struct vfsmount *);
#ifdef CONFIG_QUOTA
    ssize_t (*quota_read)(struct super_block *, int, char *, size_t, loff_t);
    ssize_t (*quota_write)(struct super_block *, int, const char *, size_t, loff_t);
#endif
    int (*bdev_try_to_free_page)(struct super_block*, struct page*, gfp_t);
};

2. 学习一下文件的操作