passt - Plug A Simple Socket Transport

	Commit message (Collapse)	Author	Age	Files	Lines
*	tcp_splice: Close sockets right away on high number of open files	Stefano Brivio	2022-03-29	1	-0/+1
\| \| \| \| \| \| \| \| \| \| \| \| \|	We can't take for granted that the hard limit for open files is big enough as to allow to delay closing sockets to a timer. Store the value of RTLIMIT_NOFILE we set at start, and use it to understand if we're approaching the limit with pending, spliced TCP connections. If that's the case, close sockets right away as soon as they're not needed, instead of deferring this task to a timer. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
*	tcp: Refactor to use events instead of states, split out spliced implementation	Stefano Brivio	2022-03-28	1	-0/+14
	Using events and flags instead of states makes the implementation much more straightforward: actions are mostly centered on events that occurred on the connection rather than states. An example is given by the ESTABLISHED_SOCK_FIN_SENT and FIN_WAIT_1_SOCK_FIN abominations: we don't actually care about which side started closing the connection to handle closing of connection halves. Split out the spliced implementation, as it has very little in common with the "regular" TCP path. Refactor things here and there to improve clarity. Add helpers to trace where resets and flag settings come from. No functional changes intended. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>