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authorTom Herbert <tom@herbertland.com>2015-07-31 16:52:12 -0700
committerDavid S. Miller <davem@davemloft.net>2015-07-31 17:07:11 -0700
commit42240901f7c438636715b9cb6ed93f4441ffc091 (patch)
tree44dfaaed66aa97ef93dc5921bedfac3808058210 /Documentation
parent67800f9b1f4eb5bbefc32e3f5044097354bc85b3 (diff)
downloadlinux-42240901f7c438636715b9cb6ed93f4441ffc091.tar.bz2
ipv6: Implement different admin modes for automatic flow labels
Change the meaning of net.ipv6.auto_flowlabels to provide a mode for automatic flow labels generation. There are four modes: 0: flow labels are disabled 1: flow labels are enabled, sockets can opt-out 2: flow labels are allowed, sockets can opt-in 3: flow labels are enabled and enforced, no opt-out for sockets np->autoflowlabel is initialized according to the sysctl value. Signed-off-by: Tom Herbert <tom@herbertland.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/networking/ip-sysctl.txt20
1 files changed, 13 insertions, 7 deletions
diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt
index 00d26d919459..9ac3af3ab739 100644
--- a/Documentation/networking/ip-sysctl.txt
+++ b/Documentation/networking/ip-sysctl.txt
@@ -1215,14 +1215,20 @@ flowlabel_consistency - BOOLEAN
FALSE: disabled
Default: TRUE
-auto_flowlabels - BOOLEAN
- Automatically generate flow labels based based on a flow hash
- of the packet. This allows intermediate devices, such as routers,
- to idenfify packet flows for mechanisms like Equal Cost Multipath
+auto_flowlabels - INTEGER
+ Automatically generate flow labels based on a flow hash of the
+ packet. This allows intermediate devices, such as routers, to
+ identify packet flows for mechanisms like Equal Cost Multipath
Routing (see RFC 6438).
- TRUE: enabled
- FALSE: disabled
- Default: false
+ 0: automatic flow labels are completely disabled
+ 1: automatic flow labels are enabled by default, they can be
+ disabled on a per socket basis using the IPV6_AUTOFLOWLABEL
+ socket option
+ 2: automatic flow labels are allowed, they may be enabled on a
+ per socket basis using the IPV6_AUTOFLOWLABEL socket option
+ 3: automatic flow labels are enabled and enforced, they cannot
+ be disabled by the socket option
+ Default: 0
flowlabel_state_ranges - BOOLEAN
Split the flow label number space into two ranges. 0-0x7FFFF is