Is there any register fee or payment to attend CLSF ?
No register fee. CLSF is an invitation only workshop, no register fee required for attendees.
If I am not invited, can I come ?
In order to have an effective communication, seats of the workshop is very limited. Only people showing the workshop badge can enter meeting room.
How can I attend CLSF ? If I am not invited this time ?
Easy, contribute more patches to file system and other storage subsystems of Linux kernel.
I am invited, how can I register to CLSF ?
You will be invited to an invitee mailing list, people will discuss proposal and other topics in the list.