Remove $FreeBSD$: one-line sh pattern

Remove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/

ctld: Disable -Wcast-align warnings.

clang complains about the downcasts from struct connection to struct
ctld_connection as the alignment of struct ctld_connection is higher
on 32-bit platforms. However, the warning is in this case harmless as
the downcasts are on objects originally allocated as instances of
struct ctld_connection with suitable alignment.

Reported by: npn, gjb
Fixes: 6378393308bc Add an internal libiscsiutil library.
Sponsored by: Chelsio Communications

Add an internal libiscsiutil library.

Move some of the code duplicated between ctld(8) and iscsid(8) into a
libiscsiutil library.

Sharing the low-level PDU code did require having a
'struct connection' base class with a method table to permit separate
initiator vs target behavior (e.g. in handling proxy PDUs).

Reviewed by: mav, emaste
Sponsored by: Chelsio Communications
Differential Revision: https://reviews.freebsd.org/D33544

pkgbase: Move ctld/ctladm to iscsi package

While here only compile both of them if WITH_ISCSI is set (this is the default).

Reviewed by: emaste
Differential Revision: https://reviews.freebsd.org/D30755
Sponsored by: Diablotin Systems

Do a sweep and remove most WARNS=6 settings

Repeating the default WARNS here makes it slightly more difficult to
experiment with default WARNS changes, e.g. if we did something absolutely
bananas and introduced a WARNS=7 and wanted to try lifting the default to
that.

Drop most of them; there is one in the blake2 kernel module, but I suspect
it should be dropped -- the default WARNS in the rest of the build doesn't
currently apply to kernel modules, and I haven't put too much thought into
whether it makes sense to make it so.

Stop linking to libl by specifying we do not need yywrap

MFC after: 3 days

Rework CTL frontend & backend options to use nv(3), allow creating multiple
ioctl frontend ports.

This revision introduces two changes to CTL:
- Changes the way options are passed to CTL_LUN_REQ and CTL_PORT_REQ ioctls.
Removes ctl_be_arg structure and associated logic and replaces it with
nv(3)-based logic for passing in and out arguments.
- Allows creating multiple ioctl frontend ports using either ctladm(8) or
ctld(8).
New frontend ports are represented by /dev/cam/ctl<pp>.<vp> nodes, eg /dev/cam/ctl5.3.
Those device nodes respond only to CTL_IO ioctl.

New command-line options for ctladm:
# creates new ioctl frontend port with using free pp and vp=0
ctladm port -c
# creates new ioctl frontend port with pp=10 and vp=0
ctladm port -c -O pp=10
# creates new ioctl frontend port with pp=11 and vp=12
ctladm port -c -O pp=11 -O vp=12
# removes port with number 4 (it's a "targ_port" number, not pp number)
ctladm port -r -p 4

New syntax for ctl.conf:
target ... {
port ioctl/<pp>
...
}

target ... {
port ioctl/<pp>/<vp>
...

Note: Most of this work was made by jceel@, thank you.

Submitted by: jceel
Reworked by: myself
Reviewed by: mav (earlier versions and recently during the rework)
Obtained from: FreeNAS and TrueOS
Relnotes: Yes
Sponsored by: iXsystems Inc.
Differential Revision: https://reviews.freebsd.org/D9299

Split iscsi(4) ctl frontend off of ctl(4) as cfiscsi(4)

The goal of this work is to remove the explicit dependency for ctl(4)
on iscsi(4), so end-users without iscsi(4) support in the kernel can
use ctl(4) for its other functions.

This allows those without iscsi(4) support built into the kernel to use
ctl(4) as a test mechanism. As a sidenote, this was possible around the
10.0-RELEASE period, but made impossible for end-users without iscsi(4)
between 10.0-RELEASE and 11.0-RELEASE.

Automatically load cfiscsi(4) from ctladm(8) and ctld(8) for backwards
compatibility with previously releases. The automatic loading feature is
compiled into the beforementioned tools if MK_ISCSI == yes when building
world.

Add a manpage for cfiscsi(4) and refer to it in ctl(4).

Differential Revision: D10099
MFC after: 2 months
Relnotes: yes
Reviewed by: mav, trasz
Sponsored by: Dell EMC Isilon

Allow WARNS to be overridden by the end-user

MFC after: 3 days
Sponsored by: Dell EMC Isilon

usr.sbin: normalize paths using SRCTOP-relative paths or :H when possible

This simplifies make logic/output

MFC after: 1 month
Sponsored by: Dell EMC Isilon

Add an additional, libucl-based configuration file parser to ctld.

Default ctld behavior remains unchanged - libucl parser can be selected
explicitly by adding -u switch to ctld command line.

Reviewed by: trasz
Approved by: trasz (mentor)
MFC after: 1 month
Relnotes: yes
Sponsored by: iXsystems, Inc.
Differential Revision: https://reviews.freebsd.org/D4534

Remove OpenSSL dependency from iscsid(8) and ctld(8).

Differential Revision: https://reviews.freebsd.org/D2866
Submitted by: Tony Morlan <tony at scroner.com> (earlier version)
Reviewed by: bapt@, delphij@
MFC after: 1 month
Sponsored by: The FreeBSD Foundation

Convert usr.sbin to LIBADD
Reduce overlinking

ctld(8) doesn't require -lcam or -lssl; remove those from DPADD and LDADD.

MFC after: 1 month
Sponsored by: The FreeBSD Foundation

Add basic iSNS client to the iSCSI target.

This makes ctld(8) register its iSCSI targets and portals on configured
iSNS servers to allow initiators find them without active discovery.

Fetching of allowed initiators from iSNS is not implemented now, so target
ACLs still should be configured manually.

Reviewed by: trasz@
MFC after: 1 month
Sponsored by: iXsystems, Inc.

Untangle iSCSI authentication code by splitting off the CHAP
implementation.

Reviewed by: mav@
MFC after: 1 month
Sponsored by: The FreeBSD Foundation

Add missing libraries to DPADD; sort DPADD so DPADD and LDADD match up

This fixes "make checkdpadd"

Approved by: jmmv (mentor)
MFC after: 2 weeks
Phabric: D630
PR: 192765

Bring in the new iSCSI target and initiator.

Reviewed by: ken (parts)
Approved by: re (delphij)
Sponsored by: FreeBSD Foundation