The first packet after the ring is initialized was never
completed as isc_txd_credits_update() would not include it in the
count of completed packets. This caused netmap to never complete
a batch. See PR 233022 for more details.

PR:		233022
Reported by:	lev
Reviewed by:	lev
MFC after:	3 days
Sponsored by:	Limelight Networks
Differential Revision:	https://reviews.freebsd.org/D17931

r254889 added tcp_state_change() as a centralized place to log state
changes in TCP connections for DTrace.  r294869 and r296881 took
advantage of this central location to manage per-state counters.
However, TOE sockets were still performing some (but not all) state
change updates via direct assignments to t_state.  This resulted in
state counters underflowing when TOE was in use.  Fix by using
tcp_state_change() when changing a TOE connection's state.

Reviewed by:	np, markj
MFC after:	1 month
Sponsored by:	Chelsio Communications
Differential Revision:	https://reviews.freebsd.org/D17915

Sponsored by:	DARPA, AFRL
Differential Revision:	https://reviews.freebsd.org/D17928

As dev_t is now a 64-bit integer, it requires special handling as a
system call argument.  64-bit arguments are split between two 64-bit
integers due to the way arguments are promoted to allow reuse of most
system call implementations.  They must be reassembled before use.
Further, 64-bit arguments at an odd offset (counting from zero) are
padded and slid to the next slot on powerpc and mips.  Fix the
non-COMPAT11 system call by adding a freebsd32_mknodat() and
appropriately padded declerations.

The COMPAT11 system calls are fully compatible with the 64-bit
implementations so remove the freebsd32_ versions.

Use uint32_t consistently as the type of the old dev_t.  This matches
the old definition.

Reviewed by:	kib
MFC after:	3 days
Sponsored by:	DARPA, AFRL
Differential Revision:	https://reviews.freebsd.org/D17928

Reported by:	linimon

It is required by llvm-profdata, now built by default under the
LLVM_COV knob.  The additional complexity that would come from avoiding
building it if CLANG_EXTRAS and LLVM_COV are both disabled is not worth
the small savings in build time.

Sponsored by:	The FreeBSD Foundation

Reported by:	Clang
MFC after:	1 week
Sponsored by:	The FreeBSD Foundation

r306041 changed ld invocations for converting binary files to kernel
ELF objects to pass -m, but missed bespoke ld invocations in a pair of
arm file configs (one of which has since been removed).

This is needed to support some external toolchains and lld.

Sponsored by:	The FreeBSD Foundation

Reported by:	sbruno
MFC after:	3 days

llvm-profdata is used with llvm-cov for code coverage (although llvm-cov
can also operate independently in a gcov-compatible mode).
Although llvm-profdata can be used independently of llvm-cov it makes
sense to group these under one option.

Also handle these in OptionalObsoleteFiles.inc while here.

Sponsored by:	The FreeBSD Foundation

Sponsored by:	DARPA, AFRL
Differential Revision:	https://reviews.freebsd.org/D17925

Bugs range from failure to update after changing syscall implementaion
names to using the wrong name.  Somewhat confusingly, the name in
capabilities.conf is exactly the string that appears in syscalls.master,
not the name with a COMPAT* prefix which is the actual function name.

Found while making a change to use the default capabilities.conf.

Fixes:	r335177, r336980, r340272, r340274, others
Reviewed by:	kib, emaste
Sponsored by:	DARPA, AFRL
Differential Revision:	https://reviews.freebsd.org/D17925

llvm-cov provides a gcov-compatible interface when invoked as gcov.

Reviewed by:	dim, markj
MFC after:	1 month
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D17923

This fixes alignment in vi's 'viusage' command and has been fixed
upstream and in OpenBSD.

Submitted by:	Raf Czlonka (github:rjc)
MFC after:	1 week
Pull Request:	https://github.com/freebsd/freebsd/pull/122

Sponsored by:	The FreeBSD Foundation

Replace hard-coded epair0b with the variable holds the real epair interface
used for testing.

Reviewed by:	kp
Approved by:	emaste, markj (mentors)
MFC with:	r339836
Sponsored by:	The FreeBSD Foundation

Submitted by:	Mitchell Horne <mhorne063@gmail.com>
Reviewed by:	kib
MFC after:	1 week
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D13957

The difference between EXERROR and EXEXEC was that EXEXEC passed along
exitstatus and EXERROR set exitstatus to 2 in the handling code.

By changing the places that raised EXERROR to set exitstatus to 2, the
handling of EXERROR and EXEXEC becomes the same.

Reviewed by:	bcr
Approved by:	krion (mentor, implicit), mat (mentor, implicit)
Differential Revision:	https://reviews.freebsd.org/D17920

Add the lb program, which is able to load-balance input traffic
received from a netmap port over M groups, with N netmap pipes in
each group. Each received packet is forwarded to one of the pipes
chosen from each group (using an L3/L4 connection-consistent hash function).
This also adds a man page for lb and some cross-references in related
man pages.

Reviewed by:	bcr, 0mp
Approved by:	gnn (mentor)
Differential Revision:	https://reviews.freebsd.org/D17735

This was shown to be a problem by side effect of now-enabled test case,
which was going through C, en_US.UTF-8, ja_JP.SJIS, and ja_JP.eucJP,
and failing eventually as data in mbrtowc's mbstate, that was
perfectly correct for en_US.UTF-8 was treated as incorrect for
ja_JP.SJIS, failing the entire test case.

This makes the persistent mbstates to be per ctype-component,
and not per-locale so we could easily reset the mbstates when
only LC_CTYPE is changed.

Reviewed by:	bapt, pfg
Approved by:	kib (mentor, implicit)
Differential Revision:	https://reviews.freebsd.org/D17796

convention.

Sponsored by:	DARPA, AFRL

Sponsored by:	DARPA, AFRL

Sponsored by:	DARPA, AFRL

Create a table which is only used inside an anchor, ensure that the
table exists.

PR:		183198
MFC after:	2 weeks

PR:		183198
Obtained from:	OpenBSD
MFC after:	2 weeks

pfctl_adjust_skip_ifaces() relies on this name.

MFC after:	2 weeks

Summary: When compiling for ELFv2, it is necessary to adjust the offset to
get_spr and factor in the function prologue to ensure the correct instruction is
being edited.

Test Plan:
Before:
```
db> show spr 110
KDB: reentering
KDB: stack backtrace:
0xc008000020fb96e0: at 0xc000000002bb2e34 = kdb_backtrace+0x68
0xc008000020fb97f0: at 0xc000000002bb3798 = kdb_reenter+0x54
0xc008000020fb9860: at 0xc000000002f87090 = trap+0x4e4
0xc008000020fb9990: at 0xc000000002f78a60 = powerpc_interrupt+0x110
0xc008000020fb9a20: kernel trap 0xe40 by 0xc000000002401978 = get_spr+0x8: srr1=0x9000000000001032
            r1=0xc008000020fb9cd0 cr=0x80009438 xer=0x20040000 ctr=0xc000000002f7b40c r2=0xc0000000037fd000
saved LR(0xfffffffffffffffb) is invalid.
```

After:

```
db> show spr 110
SPR 272(110): c000000003cae900
```

Submitted by:	git_bdragon.rtk0.net
Differential Revision: https://reviews.freebsd.org/D17813

It seems this tag is causing problems on POWER9 systems.  Since no POWER9 user
has encountered the problem fixed by r339589 just restrict it to POWER8 for now.
A better fix will likely be to update powerpc/busdma_machdep.c to handle the
window correctly.

Reported by:	mmacy, others

icmp_error allocates either an mbuf (with pkthdr) or a cluster depending
on the size of data to be quoted in the ICMP reply, but the calculation
failed to account for the additional padding that m_align may apply.

Include the ip header in the size passed to m_align.  On 64-bit archs
this will have the net effect of moving everything 4 bytes later in the
mbuf or cluster.  This will result in slightly pessimal alignment for
the ICMP data copy.

Also add an assertion that we do not move m_data before the beginning of
the mbuf or cluster.

Reported by:	A reddit user
Reviewed by:	bz, jtl
MFC after:	3 days
Security:	CVE-2018-17156
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D17909

If another thread immediately removes the link-local address
added by in6_update_ifa(), in6ifa_ifpforlinklocal() can return NULL,
so the following assertion (or dereference) is wrong.
Remove the assertion, and handle NULL somewhat better than panicking.
This matches all of the other callers of in6_update_ifa().

PR:		219250
Reviewed by:	bz, dab (both an earlier version)
MFC after:	1 week
Sponsored by:	Dell EMC Isilon
Differential Revision:	https://reviews.freebsd.org/D17898

From Jake:
The iflib stack does not disable TSO automatically when TXCSUM is
disabled, instead assuming that the driver will correctly handle TSOs
even when CSUM_IP is not set.

This results in iflib calling ixl_isc_txd_encap with packets which have
CSUM_IP_TSO, but do not have CSUM_IP or CSUM_IP_TCP set. Because of
this, ixl_tx_setup_offload will not setup the IPv4 checksum offloading.

This results in bad TSO packets being sent if a user disables TXCSUM
without disabling TSO.

Fix this by updating the ixl_tx_setup_offload function to check both
CSUM_IP and CSUM_IP_TSO when deciding whether to enable IPv4 checksums.

Once this is corrected, another issue for TSO packets is revealed. The
driver sets IFLIB_NEED_ZERO_CSUM in order to enable a work around that
causes the ip->sum field to be zero'd. This is necessary for ixl
hardware to correctly perform TSOs.

However, if TXCSUM is disabled, then the work around is not enabled, as
CSUM_IP will not be set when the iflib stack checks to see if it should
clear the sum field.

Fix this by adding IFLIB_TSO_INIT_IP to the iflib flags for the iavf and
ixl interface files.

It is uncertain if the hardware needs IFLIB_NEED_ZERO_CSUM for any other
case besides TSO, so leave that flag assigned. It may be worth
investigating to see if this work around flag could be disabled in
a future change.

Once both of these changes are made, the ixl driver should correctly
offload TSO packets when TSO4 offload is enabled, regardless of whether
TXCSUM is enabled or disabled.

Submitted by:	Jacob Keller <jacob.e.keller@intel.com>
Reviewed by:	erj@, shurd@
MFC after:	0 days
Sponsored by:	Intel Corporation
Differential Revision:	https://reviews.freebsd.org/D17900

Otherwise the diff command being run from outside the checkout resulted
in warnings.

Discussed with:	emaste
X-MFC with:	r340083

Discussed with:		markj@
Sponsored by:		Mellanox Technologies

Sponsored by:		Mellanox Technologies

Both Intel manual and Agner Fog's docs suggest aligning to 16.

See the review for benchmark results.

Reviewed by:	kib (previous version)
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D17661

of TP-LINK TL-WN321G are run(4) and not rum(4) anymore.

Reported by:	J (tech-lists zyxst.net)
MFC after:	3 days

MFC after:	3 days

isochronous bandwidth.

MFC after:		3 days
Sponsored by:		Mellanox Technologies