diff mbox series

[v2,2/2] iproute2: ip addr: Add support for setting 'optimistic'

Message ID 20200527180346.58573-2-icoolidge@google.com
State New
Headers show
Series None | expand

Commit Message

Ian K. Coolidge May 27, 2020, 6:03 p.m. UTC 
optimistic DAD is controllable via sysctl for an interface
or all interfaces on the system. This would affect addresses
added by the kernel only.

Recent kernels, however, have enabled support for adding optimistic
address via userspace. This plumbs that support.
---
 ip/ipaddress.c           | 2 +-
 man/man8/ip-address.8.in | 7 ++++++-
 2 files changed, 7 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/ip/ipaddress.c b/ip/ipaddress.c
index 403f7010..3b53933f 100644
--- a/ip/ipaddress.c
+++ b/ip/ipaddress.c
@@ -1243,7 +1243,7 @@  static const struct ifa_flag_data_t {
 	{ .name = "secondary",		.mask = IFA_F_SECONDARY,	.readonly = true,	.v6only = false},
 	{ .name = "temporary",		.mask = IFA_F_SECONDARY,	.readonly = true,	.v6only = false},
 	{ .name = "nodad",		.mask = IFA_F_NODAD,	 	.readonly = false,	.v6only = true},
-	{ .name = "optimistic",		.mask = IFA_F_OPTIMISTIC,	.readonly = true,	.v6only = true},
+	{ .name = "optimistic",		.mask = IFA_F_OPTIMISTIC,	.readonly = false,	.v6only = true},
 	{ .name = "dadfailed",		.mask = IFA_F_DADFAILED,	.readonly = true,	.v6only = true},
 	{ .name = "home",		.mask = IFA_F_HOMEADDRESS,	.readonly = false,	.v6only = true},
 	{ .name = "deprecated",		.mask = IFA_F_DEPRECATED,	.readonly = true,	.v6only = true},
diff --git a/man/man8/ip-address.8.in b/man/man8/ip-address.8.in
index 2a553190..fe773c91 100644
--- a/man/man8/ip-address.8.in
+++ b/man/man8/ip-address.8.in
@@ -92,7 +92,7 @@  ip-address \- protocol address management
 
 .ti -8
 .IR CONFFLAG " := "
-.RB "[ " home " | " mngtmpaddr " | " nodad " | " noprefixroute " | " autojoin " ]"
+.RB "[ " home " | " mngtmpaddr " | " nodad " | " optimstic " | " noprefixroute " | " autojoin " ]"
 
 .ti -8
 .IR LIFETIME " := [ "
@@ -258,6 +258,11 @@  stateless auto-configuration was active.
 (IPv6 only) do not perform Duplicate Address Detection (RFC 4862) when
 adding this address.
 
+.TP
+.B optimistic
+(IPv6 only) When performing Duplicate Address Detection, use the RFC 4429
+optimistic variant.
+
 .TP
 .B noprefixroute
 Do not automatically create a route for the network prefix of the added