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Message-Id: <1516284276-10942-2-git-send-email-serhe.popovych@gmail.com>
Date: Thu, 18 Jan 2018 16:04:28 +0200
From: Serhey Popovych <serhe.popovych@...il.com>
To: netdev@...r.kernel.org
Subject: [PATCH iproute2 v2 1/9] iplink: Use ll_index_to_name() instead of if_indextoname()
There are two reasons for switching to cached variant:
1) ll_index_to_name() may return result from cache,
eliminating expensive ioctl() to the kernel.
Note that most of the code already switched from plain
if_indextoname() to ll_index_to_name() to cached variant
in print path because in most cases cache populated.
2) It always return name in the form "if%d", even if
entry is not in cache and ioctl() fails. This drops
"link_index" from JSON output.
Signed-off-by: Serhey Popovych <serhe.popovych@...il.com>
---
bridge/fdb.c | 5 ++---
bridge/link.c | 19 +++++++------------
ip/iplink_bond.c | 38 ++++++++++++++------------------------
ip/iplink_vxlan.c | 15 ++++++---------
ip/iproute_lwtunnel.c | 7 ++-----
ip/link_gre.c | 11 +++++------
ip/link_gre6.c | 11 +++++------
ip/link_ip6tnl.c | 11 +++++------
ip/link_iptnl.c | 11 +++++------
ip/link_vti.c | 14 ++++++--------
ip/link_vti6.c | 13 ++++++-------
11 files changed, 63 insertions(+), 92 deletions(-)
diff --git a/bridge/fdb.c b/bridge/fdb.c
index 376713b..4d55fb0 100644
--- a/bridge/fdb.c
+++ b/bridge/fdb.c
@@ -219,10 +219,9 @@ int print_fdb(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
unsigned int ifindex = rta_getattr_u32(tb[NDA_IFINDEX]);
if (ifindex) {
- char ifname[IF_NAMESIZE];
+ if (!tb[NDA_LINK_NETNSID]) {
+ const char *ifname = ll_index_to_name(ifindex);
- if (!tb[NDA_LINK_NETNSID] &&
- if_indextoname(ifindex, ifname)) {
if (jw_global)
jsonw_string_field(jw_global, "viaIf",
ifname);
diff --git a/bridge/link.c b/bridge/link.c
index e2371d0..870ebe0 100644
--- a/bridge/link.c
+++ b/bridge/link.c
@@ -26,8 +26,6 @@ static const char *port_states[] = {
[BR_STATE_BLOCKING] = "blocking",
};
-extern char *if_indextoname(unsigned int __ifindex, char *__ifname);
-
static void print_link_flags(FILE *fp, unsigned int flags)
{
fprintf(fp, "<");
@@ -104,7 +102,6 @@ int print_linkinfo(const struct sockaddr_nl *who,
int len = n->nlmsg_len;
struct ifinfomsg *ifi = NLMSG_DATA(n);
struct rtattr *tb[IFLA_MAX+1];
- char b1[IFNAMSIZ];
len -= NLMSG_LENGTH(sizeof(*ifi));
if (len < 0) {
@@ -135,14 +132,10 @@ int print_linkinfo(const struct sockaddr_nl *who,
print_operstate(fp, rta_getattr_u8(tb[IFLA_OPERSTATE]));
if (tb[IFLA_LINK]) {
- SPRINT_BUF(b1);
int iflink = rta_getattr_u32(tb[IFLA_LINK]);
- if (iflink == 0)
- fprintf(fp, "@NONE: ");
- else
- fprintf(fp, "@%s: ",
- if_indextoname(iflink, b1));
+ fprintf(fp, "@%s: ",
+ iflink ? ll_index_to_name(iflink) : "NONE");
} else
fprintf(fp, ": ");
@@ -151,9 +144,11 @@ int print_linkinfo(const struct sockaddr_nl *who,
if (tb[IFLA_MTU])
fprintf(fp, "mtu %u ", rta_getattr_u32(tb[IFLA_MTU]));
- if (tb[IFLA_MASTER])
- fprintf(fp, "master %s ",
- if_indextoname(rta_getattr_u32(tb[IFLA_MASTER]), b1));
+ if (tb[IFLA_MASTER]) {
+ int master = rta_getattr_u32(tb[IFLA_MASTER]);
+
+ fprintf(fp, "master %s ", ll_index_to_name(master));
+ }
if (tb[IFLA_PROTINFO]) {
if (tb[IFLA_PROTINFO]->rta_type & NLA_F_NESTED) {
diff --git a/ip/iplink_bond.c b/ip/iplink_bond.c
index 2b5cf4f..f01fd8d 100644
--- a/ip/iplink_bond.c
+++ b/ip/iplink_bond.c
@@ -369,8 +369,6 @@ static int bond_parse_opt(struct link_util *lu, int argc, char **argv,
static void bond_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
{
- unsigned int ifindex;
-
if (!tb)
return;
@@ -380,21 +378,16 @@ static void bond_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
print_string(PRINT_ANY, "mode", "mode %s ", mode);
}
- if (tb[IFLA_BOND_ACTIVE_SLAVE] &&
- (ifindex = rta_getattr_u32(tb[IFLA_BOND_ACTIVE_SLAVE]))) {
- char buf[IFNAMSIZ];
- const char *n = if_indextoname(ifindex, buf);
+ if (tb[IFLA_BOND_ACTIVE_SLAVE]) {
+ unsigned int ifindex =
+ rta_getattr_u32(tb[IFLA_BOND_ACTIVE_SLAVE]);
- if (n)
+ if (ifindex) {
print_string(PRINT_ANY,
"active_slave",
"active_slave %s ",
- n);
- else
- print_uint(PRINT_ANY,
- "active_slave_index",
- "active_slave %u ",
- ifindex);
+ ll_index_to_name(ifindex));
+ }
}
if (tb[IFLA_BOND_MIIMON])
@@ -479,18 +472,15 @@ static void bond_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
arp_all_targets);
}
- if (tb[IFLA_BOND_PRIMARY] &&
- (ifindex = rta_getattr_u32(tb[IFLA_BOND_PRIMARY]))) {
- char buf[IFNAMSIZ];
- const char *n = if_indextoname(ifindex, buf);
+ if (tb[IFLA_BOND_PRIMARY]) {
+ unsigned int ifindex = rta_getattr_u32(tb[IFLA_BOND_PRIMARY]);
- if (n)
- print_string(PRINT_ANY, "primary", "primary %s ", n);
- else
- print_uint(PRINT_ANY,
- "primary_index",
- "primary %u ",
- ifindex);
+ if (ifindex) {
+ print_string(PRINT_ANY,
+ "primary",
+ "primary %s ",
+ ll_index_to_name(ifindex));
+ }
}
if (tb[IFLA_BOND_PRIMARY_RESELECT]) {
diff --git a/ip/iplink_vxlan.c b/ip/iplink_vxlan.c
index 661eaa7..ad7ef1c 100644
--- a/ip/iplink_vxlan.c
+++ b/ip/iplink_vxlan.c
@@ -394,10 +394,8 @@ static int vxlan_parse_opt(struct link_util *lu, int argc, char **argv,
static void vxlan_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
{
__u32 vni;
- unsigned int link;
__u8 tos;
__u32 maxaddr;
- char s2[64];
if (!tb)
return;
@@ -467,14 +465,13 @@ static void vxlan_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
&addr));
}
- if (tb[IFLA_VXLAN_LINK] &&
- (link = rta_getattr_u32(tb[IFLA_VXLAN_LINK]))) {
- const char *n = if_indextoname(link, s2);
+ if (tb[IFLA_VXLAN_LINK]) {
+ unsigned int link = rta_getattr_u32(tb[IFLA_VXLAN_LINK]);
- if (n)
- print_string(PRINT_ANY, "link", "dev %s ", n);
- else
- print_uint(PRINT_ANY, "link_index", "dev %u ", link);
+ if (link) {
+ print_string(PRINT_ANY, "link", "dev %s ",
+ ll_index_to_name(link));
+ }
}
if (tb[IFLA_VXLAN_PORT_RANGE]) {
diff --git a/ip/iproute_lwtunnel.c b/ip/iproute_lwtunnel.c
index 740da7c..a8d7171 100644
--- a/ip/iproute_lwtunnel.c
+++ b/ip/iproute_lwtunnel.c
@@ -196,7 +196,6 @@ static int read_action_type(const char *name)
static void print_encap_seg6local(FILE *fp, struct rtattr *encap)
{
struct rtattr *tb[SEG6_LOCAL_MAX + 1];
- char ifbuf[IFNAMSIZ];
int action;
parse_rtattr_nested(tb, SEG6_LOCAL_MAX, encap);
@@ -229,15 +228,13 @@ static void print_encap_seg6local(FILE *fp, struct rtattr *encap)
if (tb[SEG6_LOCAL_IIF]) {
int iif = rta_getattr_u32(tb[SEG6_LOCAL_IIF]);
- fprintf(fp, "iif %s ",
- if_indextoname(iif, ifbuf) ?: "<unknown>");
+ fprintf(fp, "iif %s ", ll_index_to_name(iif));
}
if (tb[SEG6_LOCAL_OIF]) {
int oif = rta_getattr_u32(tb[SEG6_LOCAL_OIF]);
- fprintf(fp, "oif %s ",
- if_indextoname(oif, ifbuf) ?: "<unknown>");
+ fprintf(fp, "oif %s ", ll_index_to_name(oif));
}
}
diff --git a/ip/link_gre.c b/ip/link_gre.c
index 3c0b6d6..7463d7c 100644
--- a/ip/link_gre.c
+++ b/ip/link_gre.c
@@ -380,14 +380,13 @@ static void gre_print_direct_opt(FILE *f, struct rtattr *tb[])
print_string(PRINT_ANY, "local", "local %s ", local);
- if (tb[IFLA_GRE_LINK] && rta_getattr_u32(tb[IFLA_GRE_LINK])) {
+ if (tb[IFLA_GRE_LINK]) {
unsigned int link = rta_getattr_u32(tb[IFLA_GRE_LINK]);
- const char *n = if_indextoname(link, s2);
- if (n)
- print_string(PRINT_ANY, "link", "dev %s ", n);
- else
- print_uint(PRINT_ANY, "link_index", "dev %u ", link);
+ if (link) {
+ print_string(PRINT_ANY, "link", "dev %s ",
+ ll_index_to_name(link));
+ }
}
if (tb[IFLA_GRE_TTL]) {
diff --git a/ip/link_gre6.c b/ip/link_gre6.c
index 55bd1fb..7d38f47 100644
--- a/ip/link_gre6.c
+++ b/ip/link_gre6.c
@@ -414,14 +414,13 @@ static void gre_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
print_string(PRINT_ANY, "local", "local %s ", local);
- if (tb[IFLA_GRE_LINK] && rta_getattr_u32(tb[IFLA_GRE_LINK])) {
+ if (tb[IFLA_GRE_LINK]) {
unsigned int link = rta_getattr_u32(tb[IFLA_GRE_LINK]);
- const char *n = if_indextoname(link, s2);
- if (n)
- print_string(PRINT_ANY, "link", "dev %s ", n);
- else
- print_uint(PRINT_ANY, "link_index", "dev %u ", link);
+ if (link) {
+ print_string(PRINT_ANY, "link", "dev %s ",
+ ll_index_to_name(link));
+ }
}
if (tb[IFLA_GRE_TTL]) {
diff --git a/ip/link_ip6tnl.c b/ip/link_ip6tnl.c
index bbc7878..b22e7bc 100644
--- a/ip/link_ip6tnl.c
+++ b/ip/link_ip6tnl.c
@@ -377,14 +377,13 @@ static void ip6tunnel_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb
rt_addr_n2a_rta(AF_INET6, tb[IFLA_IPTUN_LOCAL]));
}
- if (tb[IFLA_IPTUN_LINK] && rta_getattr_u32(tb[IFLA_IPTUN_LINK])) {
+ if (tb[IFLA_IPTUN_LINK]) {
unsigned int link = rta_getattr_u32(tb[IFLA_IPTUN_LINK]);
- const char *n = if_indextoname(link, s2);
- if (n)
- print_string(PRINT_ANY, "link", "dev %s ", n);
- else
- print_uint(PRINT_ANY, "link_index", "dev %u ", link);
+ if (link) {
+ print_string(PRINT_ANY, "link", "dev %s ",
+ ll_index_to_name(link));
+ }
}
if (tb[IFLA_IPTUN_TTL]) {
diff --git a/ip/link_iptnl.c b/ip/link_iptnl.c
index 24a0f0c..35ef5c0 100644
--- a/ip/link_iptnl.c
+++ b/ip/link_iptnl.c
@@ -407,14 +407,13 @@ static void iptunnel_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[
print_string(PRINT_ANY, "local", "local %s ", local);
- if (tb[IFLA_IPTUN_LINK] && rta_getattr_u32(tb[IFLA_IPTUN_LINK])) {
+ if (tb[IFLA_IPTUN_LINK]) {
unsigned int link = rta_getattr_u32(tb[IFLA_IPTUN_LINK]);
- const char *n = if_indextoname(link, s2);
- if (n)
- print_string(PRINT_ANY, "link", "dev %s ", n);
- else
- print_int(PRINT_ANY, "link_index", "dev %u ", link);
+ if (link) {
+ print_string(PRINT_ANY, "link", "dev %s ",
+ ll_index_to_name(link));
+ }
}
if (tb[IFLA_IPTUN_TTL]) {
diff --git a/ip/link_vti.c b/ip/link_vti.c
index 2b0fab2..554cfcc 100644
--- a/ip/link_vti.c
+++ b/ip/link_vti.c
@@ -168,7 +168,6 @@ static void vti_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
const char *local = "any";
const char *remote = "any";
__u32 key;
- unsigned int link;
char s2[IFNAMSIZ];
if (!tb)
@@ -192,14 +191,13 @@ static void vti_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
print_string(PRINT_ANY, "local", "local %s ", local);
- if (tb[IFLA_VTI_LINK] &&
- (link = rta_getattr_u32(tb[IFLA_VTI_LINK]))) {
- const char *n = if_indextoname(link, s2);
+ if (tb[IFLA_VTI_LINK]) {
+ unsigned int link = rta_getattr_u32(tb[IFLA_VTI_LINK]);
- if (n)
- print_string(PRINT_ANY, "link", "dev %s ", n);
- else
- print_uint(PRINT_ANY, "link_index", "dev %u ", link);
+ if (link) {
+ print_string(PRINT_ANY, "link", "dev %s ",
+ ll_index_to_name(link));
+ }
}
if (tb[IFLA_VTI_IKEY] &&
diff --git a/ip/link_vti6.c b/ip/link_vti6.c
index 74c246d..a63f49f 100644
--- a/ip/link_vti6.c
+++ b/ip/link_vti6.c
@@ -168,7 +168,6 @@ static void vti6_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
const char *remote = "any";
struct in6_addr saddr;
struct in6_addr daddr;
- unsigned int link;
char s2[64];
if (!tb)
@@ -190,13 +189,13 @@ static void vti6_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
print_string(PRINT_ANY, "local", "local %s ", local);
- if (tb[IFLA_VTI_LINK] && (link = rta_getattr_u32(tb[IFLA_VTI_LINK]))) {
- const char *n = if_indextoname(link, s2);
+ if (tb[IFLA_VTI_LINK]) {
+ unsigned int link = rta_getattr_u32(tb[IFLA_VTI_LINK]);
- if (n)
- print_string(PRINT_ANY, "link", "dev %s ", n);
- else
- print_uint(PRINT_ANY, "link_index", "dev %u ", link);
+ if (link) {
+ print_string(PRINT_ANY, "link", "dev %s ",
+ ll_index_to_name(link));
+ }
}
if (tb[IFLA_VTI_IKEY]) {
--
1.7.10.4
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