sbin: Automated cleanup of cdefs and other formatting

Apply the following automated changes to try to eliminate
no-longer-needed sys/cdefs.h includes as well as now-empty
blank lines in a row.

Remo

sbin: Automated cleanup of cdefs and other formatting

Apply the following automated changes to try to eliminate
no-longer-needed sys/cdefs.h includes as well as now-empty
blank lines in a row.

Remove /^#if.*\n#endif.*\n#include\s+<sys/cdefs.h>.*\n/
Remove /\n+#include\s+<sys/cdefs.h>.*\n+#if.*\n#endif.*\n+/
Remove /\n+#if.*\n#endif.*\n+/
Remove /^#if.*\n#endif.*\n/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/types.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/param.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/capsicum.h>/

Sponsored by: Netflix

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Remove $FreeBSD$: one-line .c pattern

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of BSD-2-Clause.

Discussed with: pfg
MFC After: 3 days
Sponsored by: Netflix

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various: general adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error

various: general adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

No functional change intended.

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Sync from head

Merge head r236710 through r238467.

IFC @238412.

IFC @ r238370

Check if there is cmsg at all.

MFC after: 3 days

IFC @ r234692

sys/amd64/include/cpufunc.h
sys/amd64/include/fpu.h
sys/amd64/amd64/fpu.c
sys/amd64/vmm/vmm.c

- Add API to allow vmm FPU state init/save/restore.

FP stuff discussed with: kib

IFC @230489 (pending review).

For functions that return -1 on failure check exactly for -1 and not for
any negative number.

MFC after: 3 days

Integrate from Head into ZFSD feature branch as of revision r224141.

MFC

Revert r222688.

Requested by: Mikolaj Golub

MFC

Read from the socket using the same max buffer size as we use while
sending. What happens otherwise is that the sender splits all the
traffic into 32k chunks, while the receiver is waiting for the wh

Read from the socket using the same max buffer size as we use while
sending. What happens otherwise is that the sender splits all the
traffic into 32k chunks, while the receiver is waiting for the whole
packet. Then for a certain packet sizes, particularly 66607 bytes in
my case, the communication stucks to secondary is expecting to
read one chunk of 66607 bytes, while primary is sending two chunks
of 32768 bytes and third chunk of 1071. Probably due to TCP windowing
and buffering the final chunk gets stuck somewhere, so neither server
not client can make any progress.

This patch also protect from short reads, as according to the manual
page there are some cases when MSG_WAITALL can give less data than
expected.

MFC after: 3 days

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Handle ENOBUFS on send(2) by retrying for a while and logging the problem.

MFC after: 1 week

When we are operating on blocking socket and get EAGAIN on send(2) or recv(2)
this means that request timed out. Translate the meaningless EAGAIN to
ETIMEDOUT to give administrator a hint that he mig

When we are operating on blocking socket and get EAGAIN on send(2) or recv(2)
this means that request timed out. Translate the meaningless EAGAIN to
ETIMEDOUT to give administrator a hint that he might need to increase timeout
in configuration file.

MFC after: 1 month

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Allow to disable sends or receives on a socket using shutdown(2) by
interpreting NULL 'data' argument passed to proto_common_send() or
proto_common_recv() as a will to do so.

MFC after: 1 month

Remove #include needed for debugging.

MFC after: 1 week

- Rename proto_descriptor_{send,recv}() functions to
proto_connection_{send,recv} and change them to return proto_conn
structure. We don't operate directly on descriptors, but on
proto_conns.
-

- Rename proto_descriptor_{send,recv}() functions to
proto_connection_{send,recv} and change them to return proto_conn
structure. We don't operate directly on descriptors, but on
proto_conns.
- Add wrap method to wrap descriptor with proto_conn.
- Remove methods to send and receive descriptors and implement this
functionality as additional argument to send and receive methods.

MFC after: 1 week

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Fix build on ia64.

I found no way how to use CMSG_NXTHDR() macro on ia64 without alignment
warnings.

MFC after: 1 week

Until I fix the build on ia64 comment out problematic lines.
Those lines are part of the (for now) unused functions.

Implement two new functions for sending descriptor and receving descriptor
over UNIX domain sockets and socket pairs.
This is in preparation for capsicum.

MFC after: 1 week