Anybody know about i_flock?

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Hello All,

   I'm rooting around in the VFS code and I'm having a problem
with i_flocks. It appears that when a lock is put on an inode
a file_lock structure is added to i_flock list and also added to 
a list of all file_lock(s). Is there any documentation that talks
about the overall design of this file locking business? Also, I
don't understand the concept of a lease (lease_modify, time_out_leases
and so on). Can anyone explain what a lease is?

Best regards,


-- 
Richard Johnson
richj25@xxxxxxxxxxxxx
(970) 490-2231
cell (303) 709-1337


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