CVS log for src/sys/compat/common/rtsock_70.c

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Merge changes from current as of 20200406

Rather than keeping a separate mutex, condvar, and pserialize for each
module hook, we can share a common set of synchronization structures.
This cuts the amount of cacheline_aligned data for these structures by
50%.

Note that we still have a per-hook localcount, since we need to count
individual references.

As discussed with riastradh@

Welcome to 9.99.22 !

Sync with HEAD

Move the set-up of the net.oroute... sysctl tree to compat_50 since
the new AF_ROUTE was introduced in NetBSD-6.0

For the rtsock compat code, make sure we create the "oroute" sysctl
tree.  Otherwise a 5.2 version of getifaddrs(2) gets errors.

This makes the 5.2 version of ifconfig(8) behave the same on both
NetBSD-8 and -current.  HOWEVER, both of them print nothing (for
``ifconfig -l'' command) so there's still a bug somewhere.

As reported originally by der Mouse.

Rename the MODULE_*_HOOK() macros to MODULE_HOOK_*() as briefly
discussed on irc.

NFCI intended.

Ride the earlier kernel bump - it;s getting crowded.

Normalize all the compat hooks' names to the form

	<subsystem>_<function>_<version>_hook

NFCI

XXX Note that although this introduces a change in the kernel-to-
XXX module interface, we are NOT bumping the kernel version number.
XXX We will bump the version number once the interface stabilizes.

Merge the [pgoyette-compat] branch

Convert the macros for setting and unsetting a hook to generate
in-line code rather than using an intermediary hook##set routine.
Hooks are set and unset only in one place, so the intermediary
routine provides no benefit.  IMHO using the macro at the point-
of-call is more readable than using it elsewhere in the code and
then calling the generated intermediary routine (for which you
won't even find its declaration or definition unless you remember
to search for the HOOK_SET macro instead).

NFC intended, will verify with a bulk build and an atf test run.

Create a variant of the HOOK macros that handles hook routines of
type void, and use them where appropriate.

Remove the HOOK2 versions of the MODULE_HOOK macros.  There were
only a few uses, and using them led to some lack of clarity in the
code.  Instead, we now use two separate hooks, with names that
make it clear(er) what we're doing.

This also positions us to start unraveling some of the rtsock_50
mess, which will need (at least) five hooks.

Convert a couple more hooks to the MP-safe mechanism.

While here, clean up some headers and remove any that are now empty.

Create a separate module for COMPAT_70 code only, and untangle the
70 compat code from the current.

Build these functions regardless of whether COMPAT_50 or COMPAT_70 are
enabled. They must be there, because they are needed in rtsock.c even
when no compat option is enabled.

update from HEAD

Sync with HEAD

Sync with HEAD

file rtsock_70.c was added on branch tls-maxphys on 2017-12-03 11:36:53 +0000

file rtsock_70.c was added on branch pgoyette-localcount on 2016-11-04 14:49:07 +0000

file rtsock_70.c was added on branch nick-nhusb on 2016-10-05 20:55:37 +0000

Add ifam_pid and ifam_addrflags to ifa_msghdr.
Re-version RTM_NEWADDR, RTM_DELADDR, RTM_CHGADDR and NET_RT_IFLIST.
Add compat code for old version.