On Tue, 1 May 2012 16:38:34 +0200
Joakim Tjernlund [off-list ref] wrote:

Stephen Hemminger [off-list ref] wrote on 2012/04/30 18:07:47:

quoted

On Mon, 30 Apr 2012 10:39:08 +0200
Joakim Tjernlund [off-list ref] wrote:

quoted

My brctl showstp br0 always shows a 0 port id:
eth2 (1)
 port id      0         state             disabled
 designated root   8000.00069c00b2fb   path cost       100

because port id is printed as a hex number in sys fs. Change the
two hex occurrences(port no and port id) to decimal, just like all
the other numbers in this area.

Signed-off-by: Joakim Tjernlund <redacted>
---
 net/bridge/br_sysfs_if.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/bridge/br_sysfs_if.c b/net/bridge/br_sysfs_if.c
index fd5799c..9c4c2eb 100644
--- a/net/bridge/br_sysfs_if.c
+++ b/net/bridge/br_sysfs_if.c

@@ -86,13 +86,13 @@ static BRPORT_ATTR(designated_cost, S_IRUGO, show_designated_cost, NULL);

 static ssize_t show_port_id(struct net_bridge_port *p, char *buf)
 {
-   return sprintf(buf, "0x%x\n", p->port_id);
+   return sprintf(buf, "%d\n", p->port_id);
 }
 static BRPORT_ATTR(port_id, S_IRUGO, show_port_id, NULL);

 static ssize_t show_port_no(struct net_bridge_port *p, char *buf)
 {
-   return sprintf(buf, "0x%x\n", p->port_no);
+   return sprintf(buf, "%d\n", p->port_no);
 }

 static BRPORT_ATTR(port_no, S_IRUGO, show_port_no, NULL);

No. This would be a visible change to applications.
The bridge utilities should be fixed instead.

Well, my reasoning was that if not the native tools got this right, what are the
chances that other apps got it right? I don't know any other apps than
brctl using this info, do you? We could check one or two apps to see what they do.

 Jocke

Current bridge-utils does not have the issue. It has been fixed
for 5 years. The problem was fixed by:

commit 0397c6aa48769505e6aa4481f0786c8f4eaaf890
Author: Jeremy Jackson [off-list ref]
Date:   Tue May 8 11:10:34 2007 -0700

    I've noticed for a while that
    
    output is showing 0 for port_no and  port_id
    
    It seems that somewhere in 2.6 sysfs land the following items got
    printed in hexadecimal, and brctl code was parsing for decimal only
    
    doug:/sys/class/net/eth0/brport# cat port_id
    0x8001
    doug:/sys/class/net/eth0/brport# cat port_no
    0x1