netdev - [PATCH iproute2-next 2/9] ipaddress: ll_map: Replace ll_idx_n2a() with ll_index_to

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Message-Id: <1517860174-18333-3-git-send-email-serhe.popovych@gmail.com>
Date:   Mon,  5 Feb 2018 21:49:27 +0200
From:   Serhey Popovych <serhe.popovych@...il.com>
To:     netdev@...r.kernel.org
Subject: [PATCH iproute2-next 2/9] ipaddress: ll_map: Replace ll_idx_n2a() with ll_index_to_name()

There is no reentrancy as well as deferred result usage for all cases
where ll_idx_n2a() being used: it is safe to use ll_index_to_name() that
internally calls ll_idx_n2a() with static buffer to hold result.

Signed-off-by: Serhey Popovych <serhe.popovych@...il.com>
---
 ip/ipaddress.c |   14 +++++---------
 1 file changed, 5 insertions(+), 9 deletions(-)

diff --git a/ip/ipaddress.c b/ip/ipaddress.c
index 38ef5d7..366a304 100644
--- a/ip/ipaddress.c
+++ b/ip/ipaddress.c
@@ -978,14 +978,13 @@ int print_linkinfo_brief(const struct sockaddr_nl *who,
 		print_bool(PRINT_ANY, "deleted", "Deleted ", true);
 
 	if (tb[IFLA_LINK]) {
-		SPRINT_BUF(b1);
 		int iflink = rta_getattr_u32(tb[IFLA_LINK]);
 
 		if (iflink == 0) {
 			snprintf(buf, sizeof(buf), "%s@...E", name);
 			print_null(PRINT_JSON, "link", NULL, NULL);
 		} else {
-			const char *link = ll_idx_n2a(iflink, b1);
+			const char *link = ll_index_to_name(iflink);
 
 			print_string(PRINT_JSON, "link", NULL, link);
 			snprintf(buf, sizeof(buf), "%s@%s", name, link);
@@ -1122,12 +1121,10 @@ int print_linkinfo(const struct sockaddr_nl *who,
 				print_int(PRINT_ANY,
 					  "link_index", "@if%d: ", iflink);
 			else {
-				SPRINT_BUF(b1);
-
 				print_string(PRINT_ANY,
 					     "link",
 					     "@%s: ",
-					     ll_idx_n2a(iflink, b1));
+					     ll_index_to_name(iflink));
 				m_flag = ll_index_to_flags(iflink);
 				m_flag = !(m_flag & IFF_UP);
 			}
@@ -1149,12 +1146,12 @@ int print_linkinfo(const struct sockaddr_nl *who,
 			     "qdisc %s ",
 			     rta_getattr_str(tb[IFLA_QDISC]));
 	if (tb[IFLA_MASTER]) {
-		SPRINT_BUF(b1);
+		int master = rta_getattr_u32(tb[IFLA_MASTER]);
 
 		print_string(PRINT_ANY,
 			     "master",
 			     "master %s ",
-			     ll_idx_n2a(rta_getattr_u32(tb[IFLA_MASTER]), b1));
+			     ll_index_to_name(master));
 	}
 
 	if (tb[IFLA_OPERSTATE])
@@ -1473,7 +1470,6 @@ static int get_filter(const char *arg)
 static int ifa_label_match_rta(int ifindex, const struct rtattr *rta)
 {
 	const char *label;
-	SPRINT_BUF(b1);
 
 	if (!filter.label)
 		return 0;
@@ -1481,7 +1477,7 @@ static int ifa_label_match_rta(int ifindex, const struct rtattr *rta)
 	if (rta)
 		label = RTA_DATA(rta);
 	else
-		label = ll_idx_n2a(ifindex, b1);
+		label = ll_index_to_name(ifindex);
 
 	return fnmatch(filter.label, label, 0);
 }
-- 
1.7.10.4