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Message-Id: <1417370335-15772-1-git-send-email-vadim4j@gmail.com>
Date: Sun, 30 Nov 2014 19:58:55 +0200
From: Vadim Kochan <vadim4j@...il.com>
To: netdev@...r.kernel.org
Cc: Vadim Kochan <vadim4j@...il.com>
Subject: [PATCH iproute2] ip link: Show devices by link type
Added new option 'type' to 'ip link show'
command which allows to filter devices by
link type name:
ip link show type bridge
ip link show type vlan
Signed-off-by: Vadim Kochan <vadim4j@...il.com>
---
ip/ipaddress.c | 24 ++++++++++++++++++++++++
ip/iplink.c | 2 +-
man/man8/ip-link.8.in | 20 +++++++++++++++++++-
3 files changed, 44 insertions(+), 2 deletions(-)
diff --git a/ip/ipaddress.c b/ip/ipaddress.c
index 4d99324..a2f7a83 100644
--- a/ip/ipaddress.c
+++ b/ip/ipaddress.c
@@ -57,6 +57,7 @@ static struct
int flushe;
int group;
int master;
+ char *link_kind;
} filter;
static int do_link;
@@ -189,6 +190,18 @@ static void print_linkmode(FILE *f, struct rtattr *tb)
fprintf(f, "mode %s ", link_modes[mode]);
}
+static char *parse_link_kind(struct rtattr *tb)
+{
+ struct rtattr *linkinfo[IFLA_INFO_MAX+1];
+
+ parse_rtattr_nested(linkinfo, IFLA_INFO_MAX, tb);
+
+ if (linkinfo[IFLA_INFO_KIND])
+ return RTA_DATA(linkinfo[IFLA_INFO_KIND]);
+
+ return "";
+}
+
static void print_linktype(FILE *fp, struct rtattr *tb)
{
struct rtattr *linkinfo[IFLA_INFO_MAX+1];
@@ -551,6 +564,14 @@ int print_linkinfo(const struct sockaddr_nl *who,
else if (filter.master > 0)
return -1;
+ if (filter.link_kind && tb[IFLA_LINKINFO]) {
+ char *link_kind = parse_link_kind(tb[IFLA_LINKINFO]);
+ if (strcmp(link_kind, filter.link_kind)) {
+ return -1;
+ }
+ } else if (filter.link_kind)
+ return -1;
+
if (n->nlmsg_type == RTM_DELLINK)
fprintf(fp, "Deleted ");
@@ -1293,6 +1314,9 @@ static int ipaddr_list_flush_or_save(int argc, char **argv, int action)
if (!ifindex)
invarg("Device does not exist\n", *argv);
filter.master = ifindex;
+ } else if (do_link && strcmp(*argv, "type") == 0) {
+ NEXT_ARG();
+ filter.link_kind = *argv;
} else {
if (strcmp(*argv, "dev") == 0) {
NEXT_ARG();
diff --git a/ip/iplink.c b/ip/iplink.c
index ce6eb3e..f9a75d5 100644
--- a/ip/iplink.c
+++ b/ip/iplink.c
@@ -82,7 +82,7 @@ void iplink_usage(void)
fprintf(stderr, " [ master DEVICE ]\n");
fprintf(stderr, " [ nomaster ]\n");
fprintf(stderr, " [ addrgenmode { eui64 | none } ]\n");
- fprintf(stderr, " ip link show [ DEVICE | group GROUP ] [up] [master DEV]\n");
+ fprintf(stderr, " ip link show [ DEVICE | group GROUP ] [up] [master DEV] [type TYPE]\n");
if (iplink_have_newlink()) {
fprintf(stderr, " ip link help [ TYPE ]\n");
diff --git a/man/man8/ip-link.8.in b/man/man8/ip-link.8.in
index 9d4e3da..4233291 100644
--- a/man/man8/ip-link.8.in
+++ b/man/man8/ip-link.8.in
@@ -148,7 +148,9 @@ ip-link \- network device configuration
.IR GROUP " | "
.BR up " | "
.B master
-.IR DEVICE " ]"
+.IR DEVICE " | "
+.B type
+.IR TYPE " ]"
.ti -8
.B ip link help
@@ -688,6 +690,12 @@ only display running interfaces.
.I DEVICE
specifies the master device which enslaves devices to show.
+.TP
+.BI type " TYPE "
+.I TYPE
+specifies the link type of devices to show.
+
+.TP
The show command has additional formatting options:
.TP
@@ -719,6 +727,16 @@ ip link show
Shows the state of all network interfaces on the system.
.RE
.PP
+ip link show type bridge
+.RS 4
+Shows the bridge devices.
+.RE
+.PP
+ip link show type vlan
+.RS 4
+Shows the vlan devices.
+.RE
+.PP
ip link set dev ppp0 mtu 1400
.RS 4
Change the MTU the ppp0 device.
--
2.1.3
--
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