Backout part of my previous commit; I was wrong about vm_zone's handling of
limits on zones w/o objects.

Remove references to vm_zone.h and switch over to the new uma API.

Also, remove maxsockets. If you look carefully you'll notice that the old
zone allocator never honored this anyway.

Get rid of the twisted MFREE() macro entirely.

Reviewed by: dg, bmilekic
MFC after: 3 days

Revert 1.81; 1.19 fixed this already in a different way.

Reorder a calculation in sbreserve so that it does not overflow
with multi-megabyte socket buffer sizes.

PR: 7420
MFC after: 3 weeks

Make AIO a loadable module.

Remove the explicit call to aio_proc_rundown() from exit1(), instead AIO
will use at_exit(9).

Add functions at_exec(9), rm_at_exec(9) which function nearly the
same as a

Make AIO a loadable module.

Remove the explicit call to aio_proc_rundown() from exit1(), instead AIO
will use at_exit(9).

Add functions at_exec(9), rm_at_exec(9) which function nearly the
same as at_exec(9) and rm_at_exec(9), these functions are called
on behalf of modules at the time of execve(2) after the image
activator has run.

Use a modified version of tegge's suggestion via at_exec(9) to close
an exploitable race in AIO.

Fix SYSCALL_MODULE_HELPER such that it's archetecuterally neutral,
the problem was that one had to pass it a paramater indicating the
number of arguments which were actually the number of "int". Fix
it by using an inline version of the AS macro against the syscall
arguments. (AS should be available globally but we'll get to that
later.)

Add a primative system for dynamically adding kqueue ops, it's really
not as sophisticated as it should be, but I'll discuss with jlemon when
he's around.

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Avoid an interaction between syncache and accept filters. The syncache
code only passed up the connection to the tcp stack when it was complete,
so it went directly into the so_comp (complete) queue

Avoid an interaction between syncache and accept filters. The syncache
code only passed up the connection to the tcp stack when it was complete,
so it went directly into the so_comp (complete) queue. However, with
accept filters, there is an additional phase before calling it "complete".

Reviewed by: jlemon

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o Back out portions of 1.50 and 1.47, eliminating sonewconn3() and
always deriving the credential for a newly accepted connection from
the listen socket. Previously, the selection of the credent

o Back out portions of 1.50 and 1.47, eliminating sonewconn3() and
always deriving the credential for a newly accepted connection from
the listen socket. Previously, the selection of the credential
depended on the protocol: UNIX domain sockets would use the
connecting process's credential, and protocols supporting a creation
of the socket before the receiving end called accept() would use
the listening socket. After this change, it is always the listening
credential.

Reviewed by: green

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Give struct socket structures a ref counting interface similar to
vnodes. This will hopefully serve as a base from which we can
expand the MP code. We currently do not attempt to obtain any
mutex o

Give struct socket structures a ref counting interface similar to
vnodes. This will hopefully serve as a base from which we can
expand the MP code. We currently do not attempt to obtain any
mutex or SX locks, but the door is open to add them when we nail
down exactly how that part of it is going to work.

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Change the kernel's ucred API as follows:
- crhold() returns a reference to the ucred whose refcount it bumps.
- crcopy() now simply copies the credentials from one credential to
another and has no

Change the kernel's ucred API as follows:
- crhold() returns a reference to the ucred whose refcount it bumps.
- crcopy() now simply copies the credentials from one credential to
another and has no return value.
- a new crshared() primitive is added which returns true if a ucred's
refcount is > 1 and false (0) otherwise.

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Allow sbcreatecontrol to make cluster sized control messages.

KSE Milestone 2
Note ALL MODULES MUST BE RECOMPILED
make the kernel aware that there are smaller units of scheduling than the
process. (but only allow one thread per process at this time).
This is fu

KSE Milestone 2
Note ALL MODULES MUST BE RECOMPILED
make the kernel aware that there are smaller units of scheduling than the
process. (but only allow one thread per process at this time).
This is functionally equivalent to teh previousl -current except
that there is a thread associated with each process.

Sorry john! (your next MFC will be a doosie!)

Reviewed by: peter@freebsd.org, dillon@freebsd.org

X-MFC after: ha ha ha ha

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Fix up indentation.

"Fix" the previous initial attempt at fixing TUNABLE_INT(). This time
around, use a common function for looking up and extracting the tunables
from the kernel environment. This saves duplicating th

"Fix" the previous initial attempt at fixing TUNABLE_INT(). This time
around, use a common function for looking up and extracting the tunables
from the kernel environment. This saves duplicating the same function
over and over again. This way typically has an overhead of 8 bytes + the
path string, versus about 26 bytes + the path string.

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Back out part of my previous commit. This was a last minute change
and I botched testing. This is a perfect example of how NOT to do
this sort of thing. :-(

Make the TUNABLE_*() macros look and behave more consistantly like the
SYSCTL_*() macros. TUNABLE_INT_DECL() was an odd name because it didn't
actually declare the int, which is what the name sugges

Make the TUNABLE_*() macros look and behave more consistantly like the
SYSCTL_*() macros. TUNABLE_INT_DECL() was an odd name because it didn't
actually declare the int, which is what the name suggests it would do.

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Revert the last bits of my bogus move of NMBCLUSTERS
to <sys/param.h>

Move the definition of NMBCLUSTERS from src/sys/kern/uipc_mbuf.c
to <sys/param.h>, so it's available to src/sys/netinet/ip_input.c,
and remove the now unneeded includes of "opt_param.h".

MFC after:

Move the definition of NMBCLUSTERS from src/sys/kern/uipc_mbuf.c
to <sys/param.h>, so it's available to src/sys/netinet/ip_input.c,
and remove the now unneeded includes of "opt_param.h".

MFC after: 1 week

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Undo part of the tangle of having sys/lock.h and sys/mutex.h included in
other "system" header files.

Also help the deprecation of lockmgr.h by making it a sub-include of
sys/lock.h and removing sys

Undo part of the tangle of having sys/lock.h and sys/mutex.h included in
other "system" header files.

Also help the deprecation of lockmgr.h by making it a sub-include of
sys/lock.h and removing sys/lockmgr.h form kernel .c files.

Sort sys/*.h includes where possible in affected files.

OK'ed by: bde (with reservations)

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Make sbcompress use the new M_WRITABLE macro. Previously sbcompress
could not compress into clusters. This could result in lots of
wasted clusters while recieving small packets from an interface
that

Make sbcompress use the new M_WRITABLE macro. Previously sbcompress
could not compress into clusters. This could result in lots of
wasted clusters while recieving small packets from an interface
that uses clusters for all it's packets.

Patch is partially from BSDi (limiting the size of the copy) and
based on a patch for 4.1 by Ian Dowse <iedowse@maths.tcd.ie> and
myself.

Reviewed by: bmilekic
Obtained From: BSDi
Submitted by: iedowse

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Remove uidinfo hash table lookup and maintenance out of chgproccnt() and
chgsbsize(), which are called rather frequently and may be called from an
interrupt context in the case of chgsbsize(). Inste

Remove uidinfo hash table lookup and maintenance out of chgproccnt() and
chgsbsize(), which are called rather frequently and may be called from an
interrupt context in the case of chgsbsize(). Instead, do the hash table
lookup and maintenance when credentials are changed, which is a lot less
frequent. Add pointers to the uidinfo structures to the ucred and pcred
structures for fast access. Pass a pointer to the credential to chgproccnt()
and chgsbsize() instead of passing the uid. Add a reference count to the
uidinfo structure and use it to decide when to free the structure rather
than freeing the structure when the resource consumption drops to zero.
Move the resource tracking code from kern_proc.c to kern_resource.c. Move
some duplicate code sequences in kern_prot.c to separate helper functions.
Change KASSERTs in this code to unconditional tests and calls to panic().

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Fix hangs caused by overzealous code removal.

Thanks, Nickolay, for figuring out this is the problem.

Submitted by: Nickolay Dudorov <nnd@mail.nsk.ru>

Remove an extraneous setting of sb_hiwat.

Remove any possibility of hiwat-related race conditions by changing
the chgsbsize() call to use a "subject" pointer (&sb.sb_hiwat) and
a u_long target to set it to. The whole thing is splnet().

Thi

Remove any possibility of hiwat-related race conditions by changing
the chgsbsize() call to use a "subject" pointer (&sb.sb_hiwat) and
a u_long target to set it to. The whole thing is splnet().

This fixes a problem that jdp has been able to provoke.

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Remove unnecessary call to splnet when setting an accept filter
since we are already at splnet.