sys: Rename sys/miscfd.h -> sys/memfd.h.

Let's not create new dumping grounds for miscellaneous stuff; one
header file for one purpose.

move the memfd struct to a separate file. Requested by riastradh@

Add memfd_create(2) from GSoC 2023 by Theodore Preduta

Support audio descriptor for fstat(1).
sys/dev/audio/*.h: export only what we need for fstat.

nuke random stuff that does not exist anymore.

Add -O to print offsets; align columns properly.

Implement support for "pshared" POSIX semaphores.

Fixes lib/53273 (and Firefox's multi-process tab feature).

Print BPF direction correctly.

Implement the BPF direction filter (BIOC[GS]DIRECTION). It provides backward
compatibility with BIOC[GS]SEESENT ioctl. The userland interface is the same
as FreeBSD.

This change also fixes a bug th

Implement the BPF direction filter (BIOC[GS]DIRECTION). It provides backward
compatibility with BIOC[GS]SEESENT ioctl. The userland interface is the same
as FreeBSD.

This change also fixes a bug that the direction is misunderstand on some
environment by passing the direction to bpf_mtap*() instead of checking
m->m_pkthdr.rcvif.

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Update fstat for audio(4) and pad(4) devices.

XXX - pullup 8.

Ok christos@.

Print the interface for bpf.

put _KMEMUSER in the Makefile

Add rnd ops.

Merge tls-earlyentropy branch into HEAD.

Fix races in /dev/u?random initialization and accounting.

- Push /dev/random `information-theoretic' accounting into cprng(9).
- Use percpu(9) for the per-CPU CPRNGs.
- Use atomics with correct memo

Fix races in /dev/u?random initialization and accounting.

- Push /dev/random `information-theoretic' accounting into cprng(9).
- Use percpu(9) for the per-CPU CPRNGs.
- Use atomics with correct memory barriers for lazy CPRNG creation.
- Remove /dev/random file kmem grovelling from fstat(1).

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Rework rndsink(9) abstraction and adapt arc4random(9) and cprng(9).

rndsink(9):
- Simplify API.
- Simplify locking scheme.
- Add a man page.
- Avoid races in destruction.
- Avoid races in requesting

Rework rndsink(9) abstraction and adapt arc4random(9) and cprng(9).

rndsink(9):
- Simplify API.
- Simplify locking scheme.
- Add a man page.
- Avoid races in destruction.
- Avoid races in requesting entropy now and scheduling entropy later.

Periodic distribution of entropy to sinks reduces the need for the
last one, but this way we don't need to rely on periodic distribution
(e.g., in a future tickless NetBSD).

rndsinks_lock should probably eventually merge with the rndpool lock,
but we'll put that off for now.

cprng(9):
- Make struct cprng_strong opaque.
- Move rndpseudo.c parts that futz with cprng guts to subr_cprng.c.
- Fix kevent locking. (Is kevent locking documented anywhere?)
- Stub out rump cprng further until we can rumpify rndsink instead.
- Strip code to grovel through struct cprng_strong in fstat.

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support printing rnd descriptor info

return stuff for ksem

Report jit'ed bpf fildes in fstat.

add all the possible fileops here, and if there is one we know about
print that instead of the passed name.

move _KMEMUSER higher!

need _KMEMUSER too.

sys/mqueue.h needs sys/types.h now

Fix sign-compare issues.

only print warnings if vflg.