net: convert to nla_get_*_default()

Most of the original conversion is from the spatch below,
but I edited some and left out other instances that were
either buggy after conversion (where default values don't
fit into the type) or just looked strange.

    @@
    expression attr, def;
    expression val;
    identifier fn =~ "^nla_get_.*";
    fresh identifier dfn = fn ## "_default";
    @@
    (
    -if (attr)
    -  val = fn(attr);
    -else
    -  val = def;
    +val = dfn(attr, def);
    |
    -if (!attr)
    -  val = def;
    -else
    -  val = fn(attr);
    +val = dfn(attr, def);
    |
    -if (!attr)
    -  return def;
    -return fn(attr);
    +return dfn(attr, def);
    |
    -attr ? fn(attr) : def
    +dfn(attr, def)
    |
    -!attr ? def : fn(attr)
    +dfn(attr, def)
    )

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Reviewed-by: Toke Høiland-Jørgensen <toke@kernel.org>
Link: https://patch.msgid.link/20241108114145.0580b8684e7f.I740beeaa2f70ebfc19bfca1045a24d6151992790@changeid
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

1 files changed, 3 insertions, 5 deletions

diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index e3b8ce89831a..e0dd9dfd71c2 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -200,7 +200,7 @@ static int verify_newsa_info(struct xfrm_usersa_info *p,
 			     struct netlink_ext_ack *extack)
 {
 	int err;
-	u8 sa_dir = attrs[XFRMA_SA_DIR] ? nla_get_u8(attrs[XFRMA_SA_DIR]) : 0;
+	u8 sa_dir = nla_get_u8_default(attrs[XFRMA_SA_DIR], 0);
 	u16 family = p->sel.family;
 
 	err = -EINVAL;
@@ -767,10 +767,8 @@ static void xfrm_smark_init(struct nlattr **attrs, struct xfrm_mark *m)
 {
 	if (attrs[XFRMA_SET_MARK]) {
 		m->v = nla_get_u32(attrs[XFRMA_SET_MARK]);
-		if (attrs[XFRMA_SET_MARK_MASK])
-			m->m = nla_get_u32(attrs[XFRMA_SET_MARK_MASK]);
-		else
-			m->m = 0xffffffff;
+		m->m = nla_get_u32_default(attrs[XFRMA_SET_MARK_MASK],
+					   0xffffffff);
 	} else {
 		m->v = m->m = 0;
 	}