Official timeout routines for netgraph nodes that know how to
use (and abuse) the node locking system.

MFC after: 1 week

Add an external function to unlink a netgraph type from the types list.

Catch up to header include changes:
- <sys/mutex.h> now requires <sys/systm.h>
- <sys/mutex.h> and <sys/sx.h> now require <sys/lock.h>

netgraph.h:
Change a prototype.
Add a function version of ng_ref_node() when debugging so
a breakpoint can be set on it.
ng_base.c:
add 'node' as an argument to ng_apply_item so that it is up

netgraph.h:
Change a prototype.
Add a function version of ng_ref_node() when debugging so
a breakpoint can be set on it.
ng_base.c:
add 'node' as an argument to ng_apply_item so that it is up
to the caller to take over and release the item's reference on
the node. If the release reports back that the node went away
due to the reference going to 0, the caller should cease referencing
the now defunct node. (e.g. the item was a 'kill node' message).
Alter ng_unref_node to report back the residual references as a result.
ng_pptpgre.c:
Don't reference a node after we dropped a reference to it.
(What if it was the last?)
Fixes a node leak reported by Harti Brandt <brandt@fokus.gmd.de>
which was due to an incorrect earlier attempt to fix the
"accessing node after dropping the last reference" problem.

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Cleanups to Macros for sending data between netgraph nodes.

Add parenthesis to a macro.
This took me 2 whole days to track down. (bleah)

Shuffle sysctls a bit (thankyou whoever made them dynamic for modules)
and add a sysctl to pppoe to activate non standard ethertypes
so that idiot ISPs (apparently in France) who use
equipment from i

Shuffle sysctls a bit (thankyou whoever made them dynamic for modules)
and add a sysctl to pppoe to activate non standard ethertypes
so that idiot ISPs (apparently in France) who use
equipment from idiot suppliers (rumour says 3com)
who use nonstandard ethertypes can still connect.

"yep, sure we do pppoe, we use a different identifier to that dictated in
the standard, but sure it's pppoe!"

sysctl -w net.graph.stupid_isp=1 enables the changeover.

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Make netgraph modules refuse to link with modules of a different ABI version.
also try implement teh documented behaviour in socket nodes
so that when there is only one hook, an unaddressed write/sen

Make netgraph modules refuse to link with modules of a different ABI version.
also try implement teh documented behaviour in socket nodes
so that when there is only one hook, an unaddressed write/send
will DTRT and send the data to that hook.

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Change the kernel internal ABI number as the HOOK structure has changed.
Forgotten by: me

Add the ability to declare ore-ride methods on a per-hook basis
for the rcvdata() and rcvmsg() methods.

Also bring the man page up to sync with my last commit. (and this one)

Implement direct support for semipersistant nodes.
(e.g. ethernet nodes are persistent until you rip out the hardware)
Use this support in the ethernet and sample nodes.
Add some more abstraction on

Implement direct support for semipersistant nodes.
(e.g. ethernet nodes are persistent until you rip out the hardware)
Use this support in the ethernet and sample nodes.
Add some more abstraction on the 'item's so that node and
hook reference counting can be checked easier.
Slight man page correction.
Make pppoe type dependent on ethernet type.
Clean up node shutdown a little.
Move a mutex from MTX_SPIN to MTX_DEF (oops)
Fix small ref-counting bug.
remove warning on one2many type.

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Add a generic "queued function callin" mechanism
Use it to implement (hopefully) SMP safe node/hook addition
and removal.
Fix some debug stuff.

Add an exported function ng_rmhook_self() that removes a hook
from a node, but does it via the locking queue, thus ensuring that the
node is locked when it's hook is removed.

Add 'deadnode' and 'dea

Add an exported function ng_rmhook_self() that removes a hook
from a node, but does it via the locking queue, thus ensuring that the
node is locked when it's hook is removed.

Add 'deadnode' and 'deadhook' structures for when a node or hook is
invalidated but not yet freed. (not yet freed)

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Unbreak compilation.

Fix some memory leaks
Add memory leak detection assitance.

Part 2 of the netgraph rewrite.
This is mostly cosmetic changes, (though I caught a bug or two while
makeing them)
Reviewed by: archie@freebsd.org

Rewrite of netgraph to start getting ready for SMP.
This version is functional and is aproaching solid..
notice I said APROACHING. There are many node types I cannot test
I have tested: echo hole ppp

Rewrite of netgraph to start getting ready for SMP.
This version is functional and is aproaching solid..
notice I said APROACHING. There are many node types I cannot test
I have tested: echo hole ppp socket vjc iface tee bpf async tty
The rest compile and "Look" right. More changes to follow.
DEBUGGING is enabled in this code to help if people have problems.

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Divorce the kernel binary ABI version number from the message
format version number. (userland programs should not need to be
recompiled when the netgraph kernel internal ABI is changed.

Also fix mo

Divorce the kernel binary ABI version number from the message
format version number. (userland programs should not need to be
recompiled when the netgraph kernel internal ABI is changed.

Also fix modules that don;t handle the fact that a caller may not supply
a return message pointer. (benign at the moment because the calling code
checks, but that will change)

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Reviewed by: Archie@freebsd.org
This clears out my outstanding netgraph changes.
There is a netgraph change of design in the offing and this is to some
extent a superset of soem of the new functional

Reviewed by: Archie@freebsd.org
This clears out my outstanding netgraph changes.
There is a netgraph change of design in the offing and this is to some
extent a superset of soem of the new functionality and some of the old
functionality that may be removed.

This code works as before, but allows some new features that I want to
work with and evaluate. It is the basis for a version of netgraph
with integral locking for SMP use.

This is running on my test machine with no new problems :-)

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Since neither archie nor I work at Whistle any more, change our email
addresses to be the more usefu @freebsd.org ones
so we can keep getting bug-reports.
- man pages to follow..

Back out the previous change to the queue(3) interface.
It was not discussed and should probably not happen.

Requested by: msmith and others

Change the way that the queue(3) structures are declared; don't assume that
the type argument to *_HEAD and *_ENTRY is a struct.

Suggested by: phk
Reviewed by: phk
Approved by: mdodd

Macro call to ng_send_dataq() should have been to ng_send_data() instead.

Use 'type_name' structure field instead of 'typename', which is
a C++ reserved work.

Add a ng_copy_meta() function.

Minimal tweak to make the ng_XXX modules depend on netgraph so that they
see its symbols and link ok.