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author | Sean Bruno <sbruno@FreeBSD.org> | 2018-04-23 19:51:00 +0000 |
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committer | Sean Bruno <sbruno@FreeBSD.org> | 2018-04-23 19:51:00 +0000 |
commit | 7b7796eea50fb8beb0ea5dd53c0aa07103498442 (patch) | |
tree | 3da9b14c33c166126096703f05325f10685bc107 /Makefile.sys.inc | |
parent | 38be3127061c92eaf648f84be4042ba49484dcde (diff) | |
download | src-7b7796eea50fb8beb0ea5dd53c0aa07103498442.tar.gz src-7b7796eea50fb8beb0ea5dd53c0aa07103498442.zip |
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
Notes
Notes:
svn path=/head/; revision=332894
Diffstat (limited to 'Makefile.sys.inc')
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