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net: fib_rules: Enable DSCP selector usage

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Now that both IPv4 and IPv6 support the new DSCP selector, enable user
space to configure FIB rules that make use of it by changing the policy
of the new DSCP attribute so that it accepts values in the range of [0,
63].

Use NLA_U8 rather than NLA_UINT as the field is of fixed size.

Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Guillaume Nault <gnault@redhat.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Link: https://patch.msgid.link/20240911093748.3662015-5-idosch@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Ido Schimmel 2024-09-11 12:37:46 +03:00 committed by Jakub Kicinski
parent 2cf630034e
commit 4b041d286e
1 changed files with 2 additions and 1 deletions
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3
net/core/fib_rules.c
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@ -11,6 +11,7 @@
#include <linux/list.h>
#include <linux/module.h>
#include <net/net_namespace.h>
#include <net/inet_dscp.h>
#include <net/sock.h>
#include <net/fib_rules.h>
#include <net/ip_tunnels.h>
@ -767,7 +768,7 @@ static const struct nla_policy fib_rule_policy[FRA_MAX + 1] = {
[FRA_IP_PROTO] = { .type = NLA_U8 },
[FRA_SPORT_RANGE] = { .len = sizeof(struct fib_rule_port_range) },
[FRA_DPORT_RANGE] = { .len = sizeof(struct fib_rule_port_range) },
[FRA_DSCP] = { .type = NLA_REJECT },
[FRA_DSCP] = NLA_POLICY_MAX(NLA_U8, INET_DSCP_MASK >> 2),
};
int fib_nl_newrule(struct sk_buff *skb, struct nlmsghdr *nlh,