struct inode {

     umode_t            i_mode;

     unsigned short        i_opflags;

     uid_t            i_uid;

     gid_t            i_gid;

     unsigned int        i_flags;

 #ifdef CONFIG_FS_POSIX_ACL

     struct posix_acl    *i_acl;

     struct posix_acl    *i_default_acl;

 #endif

     const struct inode_operations    *i_op;

     struct super_block    *i_sb;

     struct address_space    *i_mapping;

 #ifdef CONFIG_SECURITY

     void            *i_security;

 #endif

     /* Stat data, not accessed from path walking */

     unsigned long        i_ino;

     /*

      * Filesystems may only read i_nlink directly.  They shall use the

      * following functions for modification:

      *

      *    (set|clear|inc|drop)_nlink

      *    inode_(inc|dec)_link_count

      */

     union {

         const unsigned int i_nlink;

         unsigned int __i_nlink;

     };

     dev_t            i_rdev;

     struct timespec        i_atime;

     struct timespec        i_mtime;

     struct timespec        i_ctime;

     spinlock_t        i_lock;    /* i_blocks, i_bytes, maybe i_size */

     unsigned short          i_bytes;

     blkcnt_t        i_blocks;

     loff_t            i_size;

 #ifdef __NEED_I_SIZE_ORDERED

     seqcount_t        i_size_seqcount;

 #endif

     /* Misc */

     unsigned long        i_state;

     struct mutex        i_mutex;

     unsigned long        dirtied_when;    /* jiffies of first dirtying */

     struct hlist_node    i_hash;

     struct list_head    i_wb_list;    /* backing dev IO list */

     struct list_head    i_lru;        /* inode LRU list */

     struct list_head    i_sb_list;

     union {

         struct list_head    i_dentry;

         struct rcu_head        i_rcu;

     };

     atomic_t        i_count;

     unsigned int        i_blkbits;

     u64            i_version;

     atomic_t        i_dio_count;

     atomic_t        i_writecount;

     const struct file_operations    *i_fop;    /* former ->i_op->default_file_ops */

     struct file_lock    *i_flock;

     struct address_space    i_data;

 #ifdef CONFIG_QUOTA

     struct dquot        *i_dquot[MAXQUOTAS];

 #endif

     struct list_head    i_devices;

     union {

         struct pipe_inode_info    *i_pipe;

         struct block_device    *i_bdev;

         struct cdev        *i_cdev;

     };

     __u32            i_generation;

 #ifdef CONFIG_FSNOTIFY

     __u32            i_fsnotify_mask; /* all events this inode cares about */

     struct hlist_head    i_fsnotify_marks;

 #endif

 #ifdef CONFIG_IMA

     atomic_t        i_readcount; /* struct files open RO */

 #endif

     void            *i_private; /* fs or device private pointer */

 };