af_iucv: Provide new socket type SOCK_SEQPACKET
This patch provides the socket type SOCK_SEQPACKET in addition to SOCK_STREAM. AF_IUCV sockets of type SOCK_SEQPACKET supports an 1:1 mapping of socket read or write operations to complete IUCV messages. Socket data or IUCV message data is not fragmented as this is the case for SOCK_STREAM sockets. The intention is to help application developers who write applications or device drivers using native IUCV interfaces (Linux kernel or z/VM IUCV interfaces). Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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