Inodes

 uid_t i_uid;
 gid_t i_gid;

• The owner

 loff_t i_size;

• The file length, in bytes

 time_t i_atime;
 time_t i_mtime;
 time_t i_ctime;

• atime is the last access time; it's updated whenever the file is read or written

• mtime is the last modification time; it's updated whenever the file is written

• ctime is the inode change time. It's updated whenever the inode changes

  • Since reads and writes modify the atime, the ctime is also updated then

 unsigned long i_blocks;

• Number of blocks used by the file; this is what is reported by du or ls -s