linux-dev - Linux kernel development work

Age	Commit message (Collapse)	Author	Files	Lines
2018-08-02	selftest/net: fix protocol family to work for IPv4.	Maninder Singh	1	-1/+1
	use actual protocol family passed by user rather than hardcoded AF_INTE6 to cerate sockets. current code is not working for IPv4. Signed-off-by: Maninder Singh <maninder1.s@samsung.com> Signed-off-by: Vaneet Narang <v.narang@samsung.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-04-29	selftests: net: tcp_mmap must use TCP_ZEROCOPY_RECEIVE	Eric Dumazet	1	-28/+38
	After prior kernel change, mmap() on TCP socket only reserves VMA. We have to use getsockopt(fd, IPPROTO_TCP, TCP_ZEROCOPY_RECEIVE, ...) to perform the transfert of pages from skbs in TCP receive queue into such VMA. struct tcp_zerocopy_receive { __u64 address; /* in: address of mapping / __u32 length; / in/out: number of bytes to map/mapped / __u32 recv_skip_hint; / out: amount of bytes to skip */ }; After a successful getsockopt(...TCP_ZEROCOPY_RECEIVE...), @length contains number of bytes that were mapped, and @recv_skip_hint contains number of bytes that should be read using conventional read()/recv()/recvmsg() system calls, to skip a sequence of bytes that can not be mapped, because not properly page aligned. Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Andy Lutomirski <luto@kernel.org> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-04-16	selftests: net: add tcp_mmap program	Eric Dumazet	1	-0/+437
	This is a reference program showing how mmap() can be used on TCP flows to implement receive zero copy. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>