Messages in this thread | | | From | "Adam J. Richter" <> | Date | Tue, 26 Nov 2002 23:01:24 -0800 | Subject | Re: Modules with list |
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Rusty Russell writes: >In message <200211260649.WAA22216@adam.yggdrasil.com> you write: >> >TCP for example, sets the destructor function for the skb. It can be >> >called an arbitrary time later. Netfilter modules do a similar thing, >> >for similar reasons. You'd better grab a reference to *something*. >> >> The ->remove() function of a network device driver will >> not return until it has freed all receive skb's that it allocated >> and all transmit skb's that were passed to its transmit function.
>I'm not talking about a device driver, but modularizing the IPv4 >stack.
I don't see skb->destructor being set in net/ipv4 (although I see it in other net/ subdirectories). Anyhow, I don't see why ipv4 would need to increment or decrement a module reference count every time a packet is sent or received. It should suffice to do so when a file descriptor is opened or closed and when a network connection is created or completely forgotten (if that does not necessarily happen before the close system call returns).
Adam J. Richter __ ______________ 575 Oroville Road adam@yggdrasil.com \ / Milpitas, California 95035 +1 408 309-6081 | g g d r a s i l United States of America "Free Software For The Rest Of Us."
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