<net/if_var.h>: Remove last explicit dependency on <sys/malloc.h>.

These kernel sources pass M_NOWAIT flag to m_copym() and friends.
Mark that it was for M_NOWAIT visibility.

kernel: Minor whitespace cleanup in few sources (part 2).

Separated from next.

kernel: Move us to using M_NOWAIT and M_WAITOK for mbuf functions.

The main reason is that our having to use the MB_WAIT and MB_DONTWAIT
flags was a recurring issue when porting drivers from FreeBSD

kernel: Move us to using M_NOWAIT and M_WAITOK for mbuf functions.

The main reason is that our having to use the MB_WAIT and MB_DONTWAIT
flags was a recurring issue when porting drivers from FreeBSD because
it tended to get forgotten and the code would compile anyway with the
wrong constants. And since MB_WAIT and MB_DONTWAIT ended up as ocflags
for an objcache_get() or objcache_reclaimlist call (which use M_WAITOK
and M_NOWAIT), it was just one big converting back and forth with some
sanitization in between.

This commit allows M_* again for the mbuf functions and keeps the
sanitizing as it was before: when M_WAITOK is among the passed flags,
objcache functions will be called with M_WAITOK and when it is absent,
they will be called with M_NOWAIT. All other flags are scrubbed by the
MB_OCFLAG() macro which does the same as the former MBTOM().

Approved-by: dillon

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kern - More work replacing %D

Use hexncpy() for special cases where, for example,
a different separator might be needed.

vlan: Use ifq_dispatch() instead of ifq_handoff()

mbuf: Save linker layer, IP and TCP/UDP header length

This could ease most drivers's TSO operation and avoid extra data
area accessing during TSO setting up.

This could also help Intel's 1000M/10G

mbuf: Save linker layer, IP and TCP/UDP header length

This could ease most drivers's TSO operation and avoid extra data
area accessing during TSO setting up.

This could also help Intel's 1000M/10G drivers' hardware checksum
offloading, which requires protocol header length.

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kernel: Remove newlines from the panic messages that have one.

panic() itself will add a newline.

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.

Split ifnet serialize step 1/many: Add if_{serialize,deserialize,tryserialize}()
function pointers to ifnet.

These three function pointers accept ifnet struct and ifnet_serialize
enumeration.

The i

Split ifnet serialize step 1/many: Add if_{serialize,deserialize,tryserialize}()
function pointers to ifnet.

These three function pointers accept ifnet struct and ifnet_serialize
enumeration.

The ifnet_serialize enumeration indicates the serialization type:
IFNET_SERIALIZE_ALL:
All of the serializers should be held. Except for if_start and if_input,
this enumeration must be used when call ifnet function pointers.
IFNET_SERIALIZE_TX:
Only transmit serializer should be held. This enumeration could be used
when calling ifnet.if_start.
IFNET_SERIALIZE_RX:
Only receive serializer should be held. This enumeration could be used
when calling ifnet.if_input.

If the NIC driver does not set these three function pointer, then if_attach()
will set them to the default ones: only one serializer (if_serializer) is used
and ifnet_serialize parameter is ignored.

Following several inline functions are added which are sheer wrappers of the
three ifnet serialize function pointers:
ifnet_serialize_{all,tx,rx}()
ifnet_deserialize_{all,tx,rx}()
ifnet_tryserialize_{all,tx,rx}()

All of the protocol layers and most of the pseudo drivers are converted.

Discussed-with: dillon@

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Unify vlan_input() and vlan_input_tag():
- For device drivers that support hardware vlan tag extraction, mbuf's
M_VLANTAG is turned on and vlan tag is saved in mbuf.m_pkthdr.ether_vlantag
- At the

Unify vlan_input() and vlan_input_tag():
- For device drivers that support hardware vlan tag extraction, mbuf's
M_VLANTAG is turned on and vlan tag is saved in mbuf.m_pkthdr.ether_vlantag
- At the very beginning of ether_input_chain(), if the packet's ether type is
vlan and hardware does not extract vlan tag, vlan_ether_decap() is called to
do software vlan tag extraction.
- Instead of BPF_MTAP(), ETHER_BPF_MTAP() is used in ether_input_chain() to
deliver possible vlan tagging information to the bpf listeners.
- Ether header is restored before calling vlan_input(), so under most cases,
extra ether header copy is avoided. vlan_input() does nothing more than
finding vlan interface and looping back the packet to ether_input_chain()
with vlan interface as input interface.

Ideas-from: FreeBSD

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Factor out vlan_ether_ptap() from vlan_input_tag()

- Embed ether vlan tag in mbuf packet header. Add an mbuf flag to mark that
this field is valid.
- Hide ifvlan after the above change; drivers support hardware vlan tagging
only need to check et

- Embed ether vlan tag in mbuf packet header. Add an mbuf flag to mark that
this field is valid.
- Hide ifvlan after the above change; drivers support hardware vlan tagging
only need to check ether_vlantag in mbuf packet header.
- Convert all drivers that support hardware vlan tagging to use vlan tag field
in mbug packet header.

Obtained-from: FreeBSD

Change the vlan/parent serializer releasing/holding sequences into mbuf
dispatching. There are several reasons to do so:
- Avoid excessive vlan interface serializer releasing/holding
- Touching parent interface if_snd without holding parent's serializer is
unsafe
- vlan's parent may disappear or be changed after vlan's serializer is released

# This dispatching could be further optimized by packing all mbufs into one
# netmsg using m_nextpkt to:
# - Amortize netmsg sending cost
# - Reduce the time that parent interface spends on serializer releasing/holding

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kernel: Fix some printf format warnings on x86_64.

network - Major netmsg retooling, part 1

* Remove all the netmsg shims and make all pr_usrreqs and some proto->pr_*
requests directly netmsg'd.

* Fix issues with tcp implied connects and tcp6->tc

network - Major netmsg retooling, part 1

* Remove all the netmsg shims and make all pr_usrreqs and some proto->pr_*
requests directly netmsg'd.

* Fix issues with tcp implied connects and tcp6->tcp4 fallbacks with
implied connects.

* Fix an issue with a stack-based udp netmsg (allocate it)

* Consolidate struct ip6protosw and struct protosw into a single
structure and normalize the API functions which differed between
the two (primarily proto->pr_input()).

* Remove protosw->pr_soport()

* Replace varargs protocol *_input() functions (ongoing) with fixed
arguments.

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