This is a note to let you know that I've just added the patch titled
pktgen: correctly handle failures when adding a device
to the 3.7-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
pktgen-correctly-handle-failures-when-adding-a-device.patch
and it can be found in the queue-3.7 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 443811a0868d9d9815f4bbe1aabea6be7f25f906 Mon Sep 17 00:00:00 2001
From: Cong Wang <[email protected]>
Date: Sun, 27 Jan 2013 21:14:08 +0000
Subject: pktgen: correctly handle failures when adding a device
From: Cong Wang <[email protected]>
[ Upstream commit 604dfd6efc9b79bce432f2394791708d8e8f6efc ]
The return value of pktgen_add_device() is not checked, so
even if we fail to add some device, for example, non-exist one,
we still see "OK:...". This patch fixes it.
After this patch, I got:
# echo "add_device non-exist" > /proc/net/pktgen/kpktgend_0
-bash: echo: write error: No such device
# cat /proc/net/pktgen/kpktgend_0
Running:
Stopped:
Result: ERROR: can not add device non-exist
# echo "add_device eth0" > /proc/net/pktgen/kpktgend_0
# cat /proc/net/pktgen/kpktgend_0
Running:
Stopped: eth0
Result: OK: add_device=eth0
(Candidate for -stable)
Cc: David S. Miller <[email protected]>
Signed-off-by: Cong Wang <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/core/pktgen.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
--- a/net/core/pktgen.c
+++ b/net/core/pktgen.c
@@ -1795,10 +1795,13 @@ static ssize_t pktgen_thread_write(struc
return -EFAULT;
i += len;
mutex_lock(&pktgen_thread_lock);
- pktgen_add_device(t, f);
+ ret = pktgen_add_device(t, f);
mutex_unlock(&pktgen_thread_lock);
- ret = count;
- sprintf(pg_result, "OK: add_device=%s", f);
+ if (!ret) {
+ ret = count;
+ sprintf(pg_result, "OK: add_device=%s", f);
+ } else
+ sprintf(pg_result, "ERROR: can not add device %s", f);
goto out;
}
Patches currently in stable-queue which might be from [email protected] are
queue-3.7/pktgen-correctly-handle-failures-when-adding-a-device.patch
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