https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=181741

Mark Johnston <[email protected]> changed:

           What    |Removed                     |Added
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                 CC|                            |[email protected]

--- Comment #17 from Mark Johnston <[email protected]> ---
I'm not sure I see much value in internalizing ("finalizing") control messages
in sosend_generic().  In general, the socket layer does not treat the sockbuf
limits (sb_mbmax and sb_hiwat) as strict limits; see the comment about SB_STOP
in uipc_rcvd(), for example.  Furthermore, the unix socket code never actually
puts anything in the send buffer.  The purpose of the limits in this context is
to enable a somewhat rudimentary backpressure system, and since
sosend_generic() already puts a hard bound on the size of control messages, I
don't see why it needs to go through the trouble of performing an exact check.

Assuming that argument is reasonable, I believe it's sufficient to just omit
the space checks in sbappendcontrol() like we already do for SEQPACKET unix
sockets.

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