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authorJohannes Berg <johannes.berg@intel.com>2020-10-03 10:44:44 +0200
committerDavid S. Miller <davem@davemloft.net>2020-10-03 14:18:29 -0700
commitaa85ee5f9585434b12380efcd1d0353ecc86af26 (patch)
tree500b8cbb684189bf414ecbf7458744865c8011f7 /net/netlink
parent04a351a62bd4be1dbcc88fae69b990362d88ffe5 (diff)
genetlink: factor skb preparation out of ctrl_dumppolicy()
We'll need this later for the per-op policy index dump. Reviewed-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/netlink')
-rw-r--r--net/netlink/genetlink.c25
1 files changed, 19 insertions, 6 deletions
diff --git a/net/netlink/genetlink.c b/net/netlink/genetlink.c
index 89646b97300c..5e33c7938470 100644
--- a/net/netlink/genetlink.c
+++ b/net/netlink/genetlink.c
@@ -1154,6 +1154,24 @@ static int ctrl_dumppolicy_start(struct netlink_callback *cb)
rt->maxattr);
}
+static void *ctrl_dumppolicy_prep(struct sk_buff *skb,
+ struct netlink_callback *cb)
+{
+ struct ctrl_dump_policy_ctx *ctx = (void *)cb->ctx;
+ void *hdr;
+
+ hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid,
+ cb->nlh->nlmsg_seq, &genl_ctrl,
+ NLM_F_MULTI, CTRL_CMD_GETPOLICY);
+ if (!hdr)
+ return NULL;
+
+ if (nla_put_u16(skb, CTRL_ATTR_FAMILY_ID, ctx->fam_id))
+ return NULL;
+
+ return hdr;
+}
+
static int ctrl_dumppolicy(struct sk_buff *skb, struct netlink_callback *cb)
{
struct ctrl_dump_policy_ctx *ctx = (void *)cb->ctx;
@@ -1162,15 +1180,10 @@ static int ctrl_dumppolicy(struct sk_buff *skb, struct netlink_callback *cb)
void *hdr;
struct nlattr *nest;
- hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid,
- cb->nlh->nlmsg_seq, &genl_ctrl,
- NLM_F_MULTI, CTRL_CMD_GETPOLICY);
+ hdr = ctrl_dumppolicy_prep(skb, cb);
if (!hdr)
goto nla_put_failure;
- if (nla_put_u16(skb, CTRL_ATTR_FAMILY_ID, ctx->fam_id))
- goto nla_put_failure;
-
nest = nla_nest_start(skb, CTRL_ATTR_POLICY);
if (!nest)
goto nla_put_failure;