diff options
| author | Masatake YAMATO | 2017-11-24 11:31:03 +0100 |
|---|---|---|
| committer | Karel Zak | 2017-11-27 15:54:49 +0100 |
| commit | 4195756e032eb9c9be5ed8ab961ef4d72da7294c (patch) | |
| tree | d4315d108ee9594858ef74c60c64a63d78a097c0 /configure.ac | |
| parent | rtcwake: fix sys vs. rtc time delta usage (diff) | |
| download | kernel-qcow2-util-linux-4195756e032eb9c9be5ed8ab961ef4d72da7294c.tar.gz kernel-qcow2-util-linux-4195756e032eb9c9be5ed8ab961ef4d72da7294c.tar.xz kernel-qcow2-util-linux-4195756e032eb9c9be5ed8ab961ef4d72da7294c.zip | |
lsns: add netnsid column
Linux network subsystem assigns an unique integer to a network
namespace.
term0# ip netns add UTIL-LINUX-LSNS-TEST-NS
term0# ip netns list
UTIL-LINUX-LSNS-TEST-NS
term0# ip link add name lsns-vetha type veth peer name lsns-vethb
term0 # ip link set lsns-vethb netns UTIL-LINUX-LSNS-TEST-NS
term0# ip netns list
UTIL-LINUX-LSNS-TEST-NS (id: 0)
term0# ip link show dev lsns-vetha
230: lsns-vetha@if229: <BROADCAST,MULTICAST> mtu 1500 qdisc noop ...
link/ether 3e:27:68:ba:b3:95 brd ff:ff:ff:ff:ff:ff link-netnsid 0
In this example 0 is assigned to UTIL-LINUX-LSNS-TEST-NS net namespace.
The name, UTIL-LINUX-LSNS-TEST-NS, and it semantics is given and defined
by iproute2 in userland; and nothing to do with util-linux.
However, the id, 0, is managed in linux kernel. If lsns can show
the ids, it helps users understand the state of network namespaces.
This commit adds NETNSID column to the output.
Here is an example of session:
term0# ip netns exec UTIL-LINUX-LSNS-TEST-NS cat
(Open another terminal)
term1# ./lsns --type net
NS TYPE NPROCS PID USER NETNSID COMMAND
4026531993 net 383 1 root unassigned /usr/lib/systemd/...
4026532433 net 1 1219 rtkit unassigned /usr/libexec/rtkit-daemon
4026532562 net 1 18201 root 0 cat
0 is shown as NETNSID for the cat process.
For the initial name space, "unassigned" is printed.
For the namespaces other type than net, "n/a" is printed.
If an error occurred during getting the id, "n/a" is printed.
Changes in V2:
* Remove wrongly used & operators.
* Make netnsid field empty if value for the column is not available.
Suggested by Karel Zak.
* Remove redundant condtion for checking the avaiablebility of netlink
socket. Suggested by Karel Zak.
Signed-off-by: Masatake YAMATO <yamato@redhat.com>
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index 28fd7760c..79a1fd3b1 100644 --- a/configure.ac +++ b/configure.ac @@ -234,6 +234,7 @@ AC_CHECK_HEADERS([ \ linux/tiocl.h \ linux/version.h \ linux/securebits.h \ + linux/net_namespace.h \ locale.h \ mntent.h \ net/if.h \ |