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From: Sebastian Huber <sh@sourceware.org> To: newlib-cvs@sourceware.org Subject: [newlib-cygwin] Load balance sockets with new SO_REUSEPORT_LB option. Date: Fri, 24 Aug 2018 13:11:00 -0000 [thread overview] Message-ID: <20180824131141.73376.qmail@sourceware.org> (raw) https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=b40c48e0572623aac199962d1c78907a9aa82cd6 commit b40c48e0572623aac199962d1c78907a9aa82cd6 Author: sbruno <sbruno@FreeBSD.org> Date: Wed Jun 6 15:45:57 2018 +0000 Load balance sockets with new SO_REUSEPORT_LB option. This patch adds a new socket option, SO_REUSEPORT_LB, which allow multiple programs or threads to bind to the same port and incoming connections will be load balanced using a hash function. Most of the code was copied from a similar patch for DragonflyBSD. However, in DragonflyBSD, load balancing is a global on/off setting and can not be set per socket. This patch allows for simultaneous use of both the current SO_REUSEPORT and the new SO_REUSEPORT_LB options on the same system. Required changes to structures: Globally change so_options from 16 to 32 bit value to allow for more options. Add hashtable in pcbinfo to hold all SO_REUSEPORT_LB sockets. Limitations: As DragonflyBSD, a load balance group is limited to 256 pcbs (256 programs or threads sharing the same socket). This is a substantially different contribution as compared to its original incarnation at svn r332894 and reverted at svn r332967. Thanks to rwatson@ for the substantive feedback that is included in this commit. Submitted by: Johannes Lundberg <johalun0@gmail.com> Obtained from: DragonflyBSD Relnotes: Yes Sponsored by: Limelight Networks Differential Revision: https://reviews.freebsd.org/D11003 Diff: --- newlib/libc/sys/rtems/include/sys/socket.h | 35 +++++++++++++++--------------- 1 file changed, 18 insertions(+), 17 deletions(-) diff --git a/newlib/libc/sys/rtems/include/sys/socket.h b/newlib/libc/sys/rtems/include/sys/socket.h index 345eaa8..a1ffbbd 100644 --- a/newlib/libc/sys/rtems/include/sys/socket.h +++ b/newlib/libc/sys/rtems/include/sys/socket.h @@ -126,26 +126,27 @@ typedef __uintptr_t uintptr_t; /* * Option flags per-socket. */ -#define SO_DEBUG 0x0001 /* turn on debugging info recording */ -#define SO_ACCEPTCONN 0x0002 /* socket has had listen() */ -#define SO_REUSEADDR 0x0004 /* allow local address reuse */ -#define SO_KEEPALIVE 0x0008 /* keep connections alive */ -#define SO_DONTROUTE 0x0010 /* just use interface addresses */ -#define SO_BROADCAST 0x0020 /* permit sending of broadcast msgs */ +#define SO_DEBUG 0x00000001 /* turn on debugging info recording */ +#define SO_ACCEPTCONN 0x00000002 /* socket has had listen() */ +#define SO_REUSEADDR 0x00000004 /* allow local address reuse */ +#define SO_KEEPALIVE 0x00000008 /* keep connections alive */ +#define SO_DONTROUTE 0x00000010 /* just use interface addresses */ +#define SO_BROADCAST 0x00000020 /* permit sending of broadcast msgs */ #if __BSD_VISIBLE -#define SO_USELOOPBACK 0x0040 /* bypass hardware when possible */ +#define SO_USELOOPBACK 0x00000040 /* bypass hardware when possible */ #endif -#define SO_LINGER 0x0080 /* linger on close if data present */ -#define SO_OOBINLINE 0x0100 /* leave received OOB data in line */ +#define SO_LINGER 0x00000080 /* linger on close if data present */ +#define SO_OOBINLINE 0x00000100 /* leave received OOB data in line */ #if __BSD_VISIBLE -#define SO_REUSEPORT 0x0200 /* allow local address & port reuse */ -#define SO_TIMESTAMP 0x0400 /* timestamp received dgram traffic */ -#define SO_NOSIGPIPE 0x0800 /* no SIGPIPE from EPIPE */ -#define SO_ACCEPTFILTER 0x1000 /* there is an accept filter */ -#define SO_BINTIME 0x2000 /* timestamp received dgram traffic */ -#endif -#define SO_NO_OFFLOAD 0x4000 /* socket cannot be offloaded */ -#define SO_NO_DDP 0x8000 /* disable direct data placement */ +#define SO_REUSEPORT 0x00000200 /* allow local address & port reuse */ +#define SO_TIMESTAMP 0x00000400 /* timestamp received dgram traffic */ +#define SO_NOSIGPIPE 0x00000800 /* no SIGPIPE from EPIPE */ +#define SO_ACCEPTFILTER 0x00001000 /* there is an accept filter */ +#define SO_BINTIME 0x00002000 /* timestamp received dgram traffic */ +#endif +#define SO_NO_OFFLOAD 0x00004000 /* socket cannot be offloaded */ +#define SO_NO_DDP 0x00008000 /* disable direct data placement */ +#define SO_REUSEPORT_LB 0x00010000 /* reuse with load balancing */ /* * Additional options, not kept in so_options.
next reply other threads:[~2018-08-24 13:11 UTC|newest] Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-08-24 13:11 Sebastian Huber [this message] 2018-08-24 13:11 Sebastian Huber
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