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Date: Sun, 3 Oct 2021 20:45:37 +0200
From: Justin Iurman <justin.iurman@...ege.be>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net, kuba@...nel.org, yoshfuji@...ux-ipv6.org,
dsahern@...nel.org, justin.iurman@...ege.be
Subject: [PATCH net-next v2 2/4] ipv6: ioam: Prerequisite patch for ioam6_iptunnel
This prerequisite patch provides some minor edits (alignments, renames) and a
minor modification inside a function to facilitate the next patch by using
existing nla_* functions.
Signed-off-by: Justin Iurman <justin.iurman@...ege.be>
---
net/ipv6/ioam6_iptunnel.c | 55 ++++++++++++++-------------------------
1 file changed, 20 insertions(+), 35 deletions(-)
diff --git a/net/ipv6/ioam6_iptunnel.c b/net/ipv6/ioam6_iptunnel.c
index f9ee04541c17..5d03101724b9 100644
--- a/net/ipv6/ioam6_iptunnel.c
+++ b/net/ipv6/ioam6_iptunnel.c
@@ -9,7 +9,6 @@
#include <linux/kernel.h>
#include <linux/skbuff.h>
#include <linux/net.h>
-#include <linux/netlink.h>
#include <linux/in6.h>
#include <linux/ioam6.h>
#include <linux/ioam6_iptunnel.h>
@@ -17,15 +16,16 @@
#include <net/sock.h>
#include <net/lwtunnel.h>
#include <net/ioam6.h>
+#include <net/netlink.h>
#define IOAM6_MASK_SHORT_FIELDS 0xff100000
#define IOAM6_MASK_WIDE_FIELDS 0xe00000
struct ioam6_lwt_encap {
- struct ipv6_hopopt_hdr eh;
- u8 pad[2]; /* 2-octet padding for 4n-alignment */
- struct ioam6_hdr ioamh;
- struct ioam6_trace_hdr traceh;
+ struct ipv6_hopopt_hdr eh;
+ u8 pad[2]; /* 2-octet padding for 4n-alignment */
+ struct ioam6_hdr ioamh;
+ struct ioam6_trace_hdr traceh;
} __packed;
struct ioam6_lwt {
@@ -42,7 +42,7 @@ static struct ioam6_lwt_encap *ioam6_lwt_info(struct lwtunnel_state *lwt)
return &ioam6_lwt_state(lwt)->tuninfo;
}
-static struct ioam6_trace_hdr *ioam6_trace(struct lwtunnel_state *lwt)
+static struct ioam6_trace_hdr *ioam6_lwt_trace(struct lwtunnel_state *lwt)
{
return &(ioam6_lwt_state(lwt)->tuninfo.traceh);
}
@@ -51,25 +51,6 @@ static const struct nla_policy ioam6_iptunnel_policy[IOAM6_IPTUNNEL_MAX + 1] = {
[IOAM6_IPTUNNEL_TRACE] = NLA_POLICY_EXACT_LEN(sizeof(struct ioam6_trace_hdr)),
};
-static int nla_put_ioam6_trace(struct sk_buff *skb, int attrtype,
- struct ioam6_trace_hdr *trace)
-{
- struct ioam6_trace_hdr *data;
- struct nlattr *nla;
- int len;
-
- len = sizeof(*trace);
-
- nla = nla_reserve(skb, attrtype, len);
- if (!nla)
- return -EMSGSIZE;
-
- data = nla_data(nla);
- memcpy(data, trace, len);
-
- return 0;
-}
-
static bool ioam6_validate_trace_hdr(struct ioam6_trace_hdr *trace)
{
u32 fields;
@@ -231,36 +212,40 @@ static int ioam6_output(struct net *net, struct sock *sk, struct sk_buff *skb)
static int ioam6_fill_encap_info(struct sk_buff *skb,
struct lwtunnel_state *lwtstate)
{
- struct ioam6_trace_hdr *trace = ioam6_trace(lwtstate);
+ struct ioam6_trace_hdr *trace;
+ int err;
- if (nla_put_ioam6_trace(skb, IOAM6_IPTUNNEL_TRACE, trace))
- return -EMSGSIZE;
+ trace = ioam6_lwt_trace(lwtstate);
+
+ err = nla_put(skb, IOAM6_IPTUNNEL_TRACE, sizeof(*trace), trace);
+ if (err)
+ return err;
return 0;
}
static int ioam6_encap_nlsize(struct lwtunnel_state *lwtstate)
{
- struct ioam6_trace_hdr *trace = ioam6_trace(lwtstate);
+ struct ioam6_trace_hdr *trace = ioam6_lwt_trace(lwtstate);
return nla_total_size(sizeof(*trace));
}
static int ioam6_encap_cmp(struct lwtunnel_state *a, struct lwtunnel_state *b)
{
- struct ioam6_trace_hdr *a_hdr = ioam6_trace(a);
- struct ioam6_trace_hdr *b_hdr = ioam6_trace(b);
+ struct ioam6_trace_hdr *a_hdr = ioam6_lwt_trace(a);
+ struct ioam6_trace_hdr *b_hdr = ioam6_lwt_trace(b);
return (a_hdr->namespace_id != b_hdr->namespace_id);
}
static const struct lwtunnel_encap_ops ioam6_iptun_ops = {
- .build_state = ioam6_build_state,
+ .build_state = ioam6_build_state,
.output = ioam6_output,
- .fill_encap = ioam6_fill_encap_info,
+ .fill_encap = ioam6_fill_encap_info,
.get_encap_size = ioam6_encap_nlsize,
- .cmp_encap = ioam6_encap_cmp,
- .owner = THIS_MODULE,
+ .cmp_encap = ioam6_encap_cmp,
+ .owner = THIS_MODULE,
};
int __init ioam6_iptunnel_init(void)
--
2.25.1
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