Hello!
> such sock_put function. All the other functions r there. Can you give some
> idea for 2.2.x type of kernel?
This is good question.
In 2.2 each TCP socket finishes its life in net/ipv4/timer.c.
Each TCP_DONE_TIME this timer checks that socket is closed,
and as soon as timer finds it closed, destroy_sock() is called.
It is still not the end. Until socket buffers are drained,
destroy is retried each SOCK_DESTROY_TIME and finally dies in:
destroy_sock()
kill_sk_now()
sk_free(sk)
Alexey
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