diff options
| author | sbruno <sbruno@FreeBSD.org> | 2018-04-23 22:51:00 +0300 |
|---|---|---|
| committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2018-08-24 16:00:04 +0300 |
| commit | 5c636abe894466a82146994df467e6a7e8c16942 (patch) | |
| tree | 2a2eb4eaf61216dc07e10bbff79d4f1005143820 /newlib/libc/sys/rtems | |
| parent | 341e131f7fec9f5c1f17745bfe3c324029034348 (diff) | |
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).
Submitted by: Johannes Lundberg <johanlun0@gmail.com>
Sponsored by: Limelight Networks
Differential Revision: https://reviews.freebsd.org/D11003
Diffstat (limited to 'newlib/libc/sys/rtems')
| -rw-r--r-- | newlib/libc/sys/rtems/include/sys/socket.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/newlib/libc/sys/rtems/include/sys/socket.h b/newlib/libc/sys/rtems/include/sys/socket.h index 345eaa83f..19062c5ee 100644 --- a/newlib/libc/sys/rtems/include/sys/socket.h +++ b/newlib/libc/sys/rtems/include/sys/socket.h @@ -147,6 +147,9 @@ typedef __uintptr_t uintptr_t; #define SO_NO_OFFLOAD 0x4000 /* socket cannot be offloaded */ #define SO_NO_DDP 0x8000 /* disable direct data placement */ +// XXX: so_options was only 16 bit, now globally increased to 32 bit +#define SO_REUSEPORT_LB 0x00010000 /* reuse with load balancing */ + /* * Additional options, not kept in so_options. */ |