VFS layer filesytem tracking

[sanoj <k.u.sanoj@xxxxxxxxx>]

Hello all,

I want to track the read/write operations for a particular inode at the vfs layer. 

I added the following structure as a field to struct inode. 

struct meta_info 

{

 unsigned int read_count;

 unsigned int write_count;

};

This caused a problem in mounting the root device , what could be the cause ?

Am i allowed modify the struct inode by adding a new field ? 

Also, i would like to know if there are any existing mechanisms that can help me track the workload . 
at various levels

Thanks, 

sanoj