1 Extract subroutine if_dl_create() from if_alloc_sadl().
if_dl_create() allocates a link-layer ifaddr.
2 Extract subroutine ifioctl_common() from ifioctl(). ifioctl_common()
will be the basis for an ifnet "superclass" whose functions
drivers may inherit. Very simple drivers may set ifnet->if_ioctl
= ifioctl_common. More sophisticated drivers will set ifnet->if_ioctl
= driver_ioctl. driver_ioctl() will call ifioctl_common() to
re-use the common code.
reference, but mark the cache 'invalid'. Let the next user of the
route cache check to whether or not the cache is valid, and update
the rtentry reference if necessary. In this way, avoid hairy
splnet()/splx() protection of route caches, which I never did trust.
In rtcache_lookup2(), use the return values of rtcache_validate()
and _rtcache_init() instead of looking at _ro_rt. Also, check the
return code of rtcache_setdst() for an error.
ether_mediachange() to their own module that we compile only if
the kernel configuration demands support for both MII buses and
ethernet. Thanks to Tom Spindler for suggesting that these routines
move to dev/mii/.
Add if_set_sadl() that both sets the link-layer address length and
replaces the current link-layer address with a new one, and use it
throughout the tree.
to _ro_rt. Use rtcache_getrt() to access a route cache's struct
rtentry *.
Introduce struct ifnet->if_dl that always points at the interface
identifier/link-layer address. Make code that treated the first
ifaddr on struct ifnet->if_addrlist as the interface address use
if_dl, instead.
Remove stale debugging code from net/route.c. Move the rtflush()
code into rtcache_clear() and delete rtflush(). Delete rtalloc(),
because nothing uses it any more.
Make ND6_HINT an inline, lowercase subroutine, nd6_hint.
I've done my best to convert IP Filter, the ISO stack, and the
AppleTalk stack to rtcache_getrt(). They compile, but I have not
tested them. I have given the changes to PF, GRE, IPv4 and IPv6
stacks a lot of exercise.
- Reduce available SPL levels for hardware devices to none, vm, sched, high.
- Acquire kernel_lock only for interrupts at IPL_VM.
- Implement threaded soft interrupts.
