VFS之inode操作

Linux 核心中針對索引節點其需要提供的索引節點操作，一般是具體檔案系統提供


struct inode_operations {
 struct dentry * (*lookup) (struct inode *,struct dentry *, unsigned int);
 const char * (*get_link) (struct dentry *, struct inode *, struct delayed_call *);
 int (*permission) (struct inode *, int);
 struct posix_acl * (*get_acl)(struct inode *, int);

 int (*readlink) (struct dentry *, char __user *,int);

 int (*create) (struct inode *,struct dentry *, umode_t, bool);
 int (*link) (struct dentry *,struct inode *,struct dentry *);
 int (*unlink) (struct inode *,struct dentry *);
 int (*symlink) (struct inode *,struct dentry *,const char *);
 int (*mkdir) (struct inode *,struct dentry *,umode_t);
 int (*rmdir) (struct inode *,struct dentry *);
 int (*mknod) (struct inode *,struct dentry *,umode_t,dev_t);
 int (*rename) (struct inode *, struct dentry *,
   struct inode *, struct dentry *, unsigned int);
 int (*setattr) (struct dentry *, struct iattr *);
 int (*getattr) (struct vfsmount *mnt, struct dentry *, struct kstat *);
 ssize_t (*listxattr) (struct dentry *, char *, size_t);
 int (*fiemap)(struct inode *, struct fiemap_extent_info *, u64 start,
        u64 len);
 int (*update_time)(struct inode *, struct timespec *, int);
 int (*atomic_open)(struct inode *, struct dentry *,
      struct file *, unsigned open_flag,
      umode_t create_mode, int *opened);
 int (*tmpfile) (struct inode *, struct dentry *, umode_t);
 int (*set_acl)(struct inode *, struct posix_acl *, int);
} ____cacheline_aligned;