Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

MFC r258578, r258580, r258581 (by hrs):
Replace Sun RPC license in TI-RPC library with a 3-clause BSD license
with the explicit permissions.

MFC r241007, r241008:

Complete revert of r239963 (from head).

The attempt to merge changes from the linux libtirpc caused
rpc.lockd to exit after startup under unclear conditions.

Reported by: David Wolfskill

MFC r239963:

Bring some changes from Bull's NFSv4 libtirpc implementation.

____

Fixed infinite loop in svc_run()
____

__rpc_taddr2uaddr_af() assumes the netbuf to always have a
non-zero data. This is a bad assumption and can lead to a
seg-fault. This patch adds a check for zero length and returns
NULL when found.
____

Changed clnt_spcreateerror() to return clearer
and more concise error messages.
____

Converted all uid and gid variables of the type uid_t and gid_t.
____

libtirpc: set r_netid and r_owner in __rpcb_findaddr_timed

These fields in the rpcbind GETADDR call are being passed uninitialized
to CLNT_CALL. In the case of x86_64 at least, this usually leads to a
segfault. On x86, it sometimes causes segfaults and other times causes
garbage to be sent on the wire.

rpcbind generally ignores the r_owner field for calls that come in over
the wire, so it really doesn't matter what we send in that slot. We just
need to send something. The reference implementation from Sun seems to
send a blank string. Have ours follow suit.
____

libtirpc: be sure to free cl_netid and cl_tp

When creating a client with clnt_tli_create, it uses strdup to copy
strings for these fields if nconf is passed in. clnt_dg_destroy frees
these strings already. Make sure clnt_vc_destroy frees them in the same
way.

____

Obtained from: Bull GNU/Linux NFSv4 Project

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

Fix some improper handling of malloc failures

PR: bin/83344 , kern/81987
Reviewed by: alfred
Approved by: re (kensmith)
MFC after: 1 week

Sync with NetBSD rev. 1.20 + 1.21

Coverity CID 2284: Fix multiple memory leaks.
Coverity CID 710: Remove unreachable code.

MFC after: 1 month

Staticize a couple of functions.

Remove a few unused locks.

Remove locks from application namespace.

Try to bring some sanity to the SCM ID's.
+ spell LIBC_SCCS consistently
+ enable builds with LIBC_SCCS defined to not syntax error
+ minor SCM reformatting to try to have some consistency

Don't compare NULL against a character.

Obtained from: NetBSD

Add missing __rpc_fixup_addr. This is needed to make
mount_nfs -T work for scoped addresses.

NetBSD Rev 1.11

Reviewed by: phk
Obtained from: NetBSD

Revert part of revision 1.10, as it broke portmap lookups for IPv4
TCP clients. The problem was that a struct netconfig returned by
getnetconfigent() was being treated as a handle for __rpc_getconf(),
which certainly isn't right.

The tirpc-99 code uses __rpc_setconf("udp")/__rpc_getconf() to find
the IPv4 udp netconfig, but our implementation of these functions
seem happy to return IPv6 entries, so we can't use them. By reverting
to the old version, we are hard-coding the name of the udp4 netid.

Tracked down by: Bakul Shah <bakul@bitblocks.com>

Add functions allowing for the user to specify a timeout for rpc functions.

Update copyrights to reflect where this code was lifted from. (tirpc '99)

Submitted by: mbr

Fix the style of the SCM ID's.
I believe have made all of libc .c's as consistent as possible.

Remove multi-line __P() usage.

Remove __P() usage.

Fix two file descriptor leaks in the internal function local_rpcb()
that is used by a number of rpcbind-related library functions. Also
fix a rpc client leak in rpcb_set().

Submitted by: mbr
Obtained from: NetBSD

Do not call addrinfo on local transport adresses, if returning a
server handle (for reuse or whatever). We just return now a handle
connected to the local rpcbind.

Do not try to call checkcache, if host = NULL;

Submitted by: mbr

In getclnthandle(), if the address is found in the cache we need
to strdup() the address string before returning it via *targaddr
because the caller will free the string.

Change the comment at the top of getclnthandle() to clarify that
the caller is responsible for freeing *targaddr.

Noticed by: sobomax

Fix a memory leak in __rpcb_findaddr(), avoid compiler warnings.

Submitted by: Martin Blapp <mb@imp.ch>

Move the #includes of reentrant.h to after the `#include "namespace.h"',
so that the underscored versions of the pthread functions get
declared. This removes around 300 lines of 'implicit declaration
of XXX' warnings from the output of a libc build with -Wall.

Reviewed by: Martin Blapp <mb@imp.ch>, alfred

Bring in a hybrid of SunSoft's transport-independent RPC (TI-RPC) and
associated changes that had to happen to make this possible as well as
bugs fixed along the way.

Bring in required TLI library routines to support this.

Since we don't support TLI we've essentially copied what NetBSD
has done, adding a thin layer to emulate direct the TLI calls
into BSD socket calls.

This is mostly from Sun's tirpc release that was made in 1994,
however some fixes were backported from the 1999 release (supposedly
only made available after this porting effort was underway).

The submitter has agreed to continue on and bring us up to the
1999 release.

Several key features are introduced with this update:
Client calls are thread safe. (1999 code has server side thread
safe)
Updated, a more modern interface.

Many userland updates were done to bring the code up to par with
the recent RPC API.

There is an update to the pthreads library, a function
pthread_main_np() was added to emulate a function of Sun's threads
library.

While we're at it, bring in NetBSD's lockd, it's been far too
long of a wait.

New rpcbind(8) replaces portmap(8) (supporting communication over
an authenticated Unix-domain socket, and by default only allowing
set and unset requests over that channel). It's much more secure
than the old portmapper.

Umount(8), mountd(8), mount_nfs(8), nfsd(8) have also been upgraded
to support TI-RPC and to support IPV6.

Umount(8) is also fixed to unmount pathnames longer than 80 chars,
which are currently truncated by the Kernel statfs structure.

Submitted by: Martin Blapp <mb@imp.ch>
Manpage review: ru
Secure RPC implemented by: wpaul