kernel: Remove numerous #include <sys/thread2.h>.

Most of them were added when we converted spl*() calls to
crit_enter()/crit_exit(), almost 14 years ago. We can now
remove a good chunk of them agai

kernel: Remove numerous #include <sys/thread2.h>.

Most of them were added when we converted spl*() calls to
crit_enter()/crit_exit(), almost 14 years ago. We can now
remove a good chunk of them again for where crit_*() are
no longer used.

I had to adjust some files that were relying on thread2.h
or headers that it includes coming in via other headers
that it was removed from.

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netisr: Renaming, cpufn -> hashfn; no functional changes

Merge branches 'hammer2' and 'master' of ssh://crater.dragonflybsd.org/repository/git/dragonfly into hammer2

kernel: Make SMP support default (and non-optional).

The 'SMP' kernel option gets removed with this commit, so it has to
be removed from everybody's configs.

Reviewed-by: sjg
Approved-by: many

Initial import of binutils 2.22 on the new vendor branch

Future versions of binutils will also reside on this branch rather
than continuing to create new binutils branches for each new version.

netisr: Add pktinfo struct; add new netisr method to find msgport using pktinfo

The new netisr method, ni_mport_pktinfo, returns NULL if the passed in pktinfo
does not contain enough information to

netisr: Add pktinfo struct; add new netisr method to find msgport using pktinfo

The new netisr method, ni_mport_pktinfo, returns NULL if the passed in pktinfo
does not contain enough information to determine the msgport.

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Add NETISR_FLAG_NOTMPSAFE, which could be used as the last parameter to
netisr_register(), more expressive and less error-prone than 0.

Suggested-by: hsu@

Add following three network protocol threads running mode:
1) BGL (default)
2) Adaptive BGL. Protocol threads run without BGL by default. BGL will be
held if the received msg does not have MSGF_

Add following three network protocol threads running mode:
1) BGL (default)
2) Adaptive BGL. Protocol threads run without BGL by default. BGL will be
held if the received msg does not have MSGF_MPSAFE turned on the ms_flags
field
3) No BGL (experimental)

The code on the main path is done by dillon@

Following three sysctls and tunables are added to adjust the "mode":
net.netisr.mpsafe_thread
net.inet.tcp.mpsafe_thread
net.inet.udp.mpsafe_thread

They have same set of values,
0 (default) -- BGL
1 -- Adaptive BGL
2 -- No BGL



NETISR_FLAG_MPSAFE is added (netisr.ni_flags), so that:
- netisr_queue() and schednetisr() could set MSGF_MPSAFE during msg
initialization
- netisr_run() (called by ether_input_oncpu()) could hold BGL based on this flag
before calling netisr's handler



PR_MPSAFE is added (protosw.pr_flags), so that tranport_processing_oncpu() could
hold BGL before calling protocol's input handler



Kernel API changes:
- The thread parameter to netmsg_service_loop() must be supplied (running mode)
and it must have the type of "int *"
- netisr_register() takes additional flags parameter to indicate whether its
handler is MPSAFE (NETISR_FLAG_MPSAFE) or not

Reviewed-by: dillon@

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* Don't call ifp->if_output() from inside mpls_output(). Make the
caller responsible for sending the packet.

* Fix mpls gateway arp resoving.

* Introduce a new mbuf flag M_MPLSLABELED indicating

* Don't call ifp->if_output() from inside mpls_output(). Make the
caller responsible for sending the packet.

* Fix mpls gateway arp resoving.

* Introduce a new mbuf flag M_MPLSLABELED indicating that the packet
has at least one valid mpls label on it.

* Use the new mbuf flag instead of forging a sockaddr_mpls to let
ether_output() identify the mpls packets.

* Drop the packet when mpls ttl is exceeded (doesn't send an ICMP message yet).

* Fix compilation warning.

* Improve comments.

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Introduce experimental MPLS over ethernet support. Add 'options MPLS'
to the kernel config file to enable it. This modification increases
the footprint of each route in the FIB by 12 bytes, used to h

Introduce experimental MPLS over ethernet support. Add 'options MPLS'
to the kernel config file to enable it. This modification increases
the footprint of each route in the FIB by 12 bytes, used to hold up
to 3 label operations per route.

Hints-from: Ayame, NiSTswitch implementations.
Reviewed-by: dillon@, sephe@, hsu@, hasso@.

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network - Major netmsg retooling, part 2

* Convert remaining protocols (divert, ipx, mpls, natm).

* Minor code correction in gif (no operational change).

* Remove NS protocol from LINT in preparat

network - Major netmsg retooling, part 2

* Convert remaining protocols (divert, ipx, mpls, natm).

* Minor code correction in gif (no operational change).

* Remove NS protocol from LINT in preparation for complete removal
from tree.

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network - Completely revamp the netisr / dispatch code

* All netisrs are dispatched MPSAFE (followup in later commits)

* Centralize the protocol threads. There is now just one thread
per cpu man

network - Completely revamp the netisr / dispatch code

* All netisrs are dispatched MPSAFE (followup in later commits)

* Centralize the protocol threads. There is now just one thread
per cpu managed by the netisr code. No more separate tcp/udp threads
on each cpu.

* Make the mbuf M_HASH/m_pkthdr.hash mechanic the central routing
mechanic for netmsgs.

* Remove the netisr ip_mport and pktinfo_portfn stuff and replace with a
cpufn function which handles M_HASH/m_pkthdr.hash when M_HASH is not
already set.

* Seriously clean up the packet input paths. Adjust ether_input_chain() and
friends to not have to adjust the mbuf forwards and backwards, instead
pass a header offset to the ni_cpufn function. The ip pullup and other
related code will use the offset to determine where the ip header is
within the packet.

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