s/reqest/request/, s/requst/request/ and s/reuqest/request/ in comments.

Don't accept negative value.

Reported-by: syzbot+e71a77402d6668f1868d@syzkaller.appspotmail.com

Zero out the ifreq struct for SIOCGIFCONF to avoid up to 127 bytes of stack
disclosure. From Andy Nguyen, many thanks! This is the compat code part
pointed out by ozaki-r@

Fix pserialize enter/exit pairs in linux_getifconf and linux32_getifconf

Tested by using a small linux program that uses ioctl(SIOCGIFCONF).
Probably fix PR kern/53259 as well.

Fix and make consistent of usages of psz/psref in ifconf variants

Use if_acquire and if_release instead of using psref API directly

- Provide if_release for consistency to if_acquire
- Use if_acquire and if_release for ifp iterations
- Make ifnet_psref_class static

Apply pserialize and psref to struct ifaddr and its variants

This change makes struct ifaddr and its variants (in_ifaddr and in6_ifaddr)
MP-safe by using pserialize and psref. At this moment, pseria

Apply pserialize and psref to struct ifaddr and its variants

This change makes struct ifaddr and its variants (in_ifaddr and in6_ifaddr)
MP-safe by using pserialize and psref. At this moment, pserialize_perform
and psref_target_destroy are disabled because (1) we don't need them
because of softnet_lock (2) they cause a deadlock because of softnet_lock.
So we'll enable them when we remove softnet_lock in the future.

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Switch the address list of intefaces to pslist(9)

As usual, we leave the old list to avoid breaking kvm(3) users.

Fix psref isn't released in a case of IFADDR_EMPTY

Use curlwp_bind and curlwp_bindx instead of open-coding LP_BOUND

Protect if_byindex by pserialize

Protect ifnet list with psz and psref

The change ensures that ifnet objects in the ifnet list aren't freed during
list iterations by using pserialize(9) and psref(9).

Note that the change adds a ps

Protect ifnet list with psz and psref

The change ensures that ifnet objects in the ifnet list aren't freed during
list iterations by using pserialize(9) and psref(9).

Note that the change adds a pslist(9) for ifnet but doesn't remove the
original ifnet list (ifnet_list) to avoid breaking kvm(3) users. We
shouldn't use the original list in the kernel anymore.

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Unused inits (harmless).

Found by Brainy.

Tweak ifconf variants

The tweaks make the code intention clear and make further changes easy.

No functional change.

Replace open-coded access (and boundary checking) of ifindex2ifnet with
if_byindex() function.

Use copyin/copyout and linux-specific ifreq structures (they are the same
as the netbsd ones, but this disconnects them)

Do not read past end of array. Found by gcc -03

Add missing semicolons after NETBSD32TOx_UAP macro calls.

Add SIOCGIFMTU support.

Do not give native requests to netbsd32_ioctl(), use the compat
netbsd32 equivalent instead.

Return the result of copyout. Reminded by Niolas Joly.

Provide SIOCGIFNAME.

Make the emulations, exec formats, coredump, NFS, and the NFS server
into modules. By and large this commit:

- shuffles header files and ifdefs
- splits code out where necessary to be modular
- adds

Make the emulations, exec formats, coredump, NFS, and the NFS server
into modules. By and large this commit:

- shuffles header files and ifdefs
- splits code out where necessary to be modular
- adds module glue for each of the components
- adds/replaces hooks for things that can be installed at runtime

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Add linux32_getifconf, following recent linux_getifconf addition.

Add SIOCGIFHWADDR support.
Tested by Cem Kayali.