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bhyve/snapshot: use SOCK_DGRAM instead of SOCK_STREAM

Description

bhyve/snapshot: use SOCK_DGRAM instead of SOCK_STREAM

The save/restore feature uses a unix domain socket to send messages
from bhyvectl(8) to a bhyve(8) process. A datagram socket will suffice
for this.

An added benefit of using a datagram socket is simplified code. For
bhyve, the listen/accept calls are dropped; and for bhyvectl, the
connect() call is dropped.

EPRINTLN handles raw mode for bhyve(8), use it to print error messages.

Reviewed by: jhb
Differential Revision: https://reviews.freebsd.org/D28983

Details

Provenance
rewAuthored on Mar 8 2021, 12:23 AM
Reviewer
jhb
Differential Revision
D28983: bhyve/snapshot: use SOCK_DGRAM instead of SOCK_STREAM
Parents
rG0424d9ebeb17: decryptcore: do not include sys/sysctl.h
Branches
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