linux-toradex.git/drivers/net/netdevsim, branch v5.13-rc3

netdevsim: Only use sampling truncation length when valid

2021-04-22T20:23:56+00:00

When the sampling truncation length is invalid (zero), pass the length
of the packet. Without the fix, no payload is reported to user space
when the truncation length is zero.

Fixes: a8700c3dd0a4 ("netdevsim: Add dummy psample implementation")
Signed-off-by: Ido Schimmel 
Acked-by: Jakub Kicinski 
Signed-off-by: David S. Miller

netdevsim: remove unneeded semicolon

2021-04-06T23:27:33+00:00

Eliminate the following coccicheck warning:
 drivers/net/netdevsim/fib.c:569:2-3: Unneeded semicolon

Signed-off-by: Qiheng Lin 
Acked-by: Jakub Kicinski 
Signed-off-by: David S. Miller

netdevsim: add FEC settings support

2021-03-31T21:15:23+00:00

Add support for ethtool FEC and some ethtool error injection.

Signed-off-by: Jakub Kicinski 
Signed-off-by: David S. Miller

netdevsim: switch to memdup_user_nul()

2021-03-24T23:26:58+00:00

Use memdup_user_nul() helper instead of open-coding to
simplify the code.

Reported-by: Hulk Robot 
Signed-off-by: Wei Yongjun 
Reviewed-by: Jakub Kicinski 
Signed-off-by: David S. Miller

netdevsim: Add dummy psample implementation

2021-03-14T22:00:43+00:00

Allow netdevsim to report "sampled" packets to the psample module by
periodically generating packets from a work queue. The behavior can be
enabled / disabled (default) and the various meta data attributes can be
controlled via debugfs knobs.

This implementation enables both testing of the psample module with all
the optional attributes as well as development of user space
applications on top of psample such as hsflowd and a Wireshark dissector
for psample generic netlink packets.

Signed-off-by: Ido Schimmel 
Signed-off-by: David S. Miller

netdevsim: Allow reporting activity on nexthop buckets

2021-03-13T01:44:10+00:00

A key component of the resilient hashing algorithm is the hash buckets'
activity. If a bucket is active, it will not be populated with a new
nexthop in order not to break existing flows. Therefore, in order to
easily and thoroughly test the algorithm, we need to be in full control
over the reported activity.

Add a debugfs interface that allows user space to have netdevsim report
a nexthop bucket within a resilient nexthop group as active. For
example:

 # echo 10 23 > /sys/kernel/debug/netdevsim/netdevsim10/fib/nexthop_bucket_activity

Will mark bucket 23 in nexthop group 10 as active.

Signed-off-by: Ido Schimmel 
Reviewed-by: Petr Machata 
Signed-off-by: Petr Machata 
Signed-off-by: David S. Miller

netdevsim: Add support for resilient nexthop groups

2021-03-13T01:44:10+00:00

Allow resilient nexthop groups to be programmed and account their
occupancy according to their number of buckets. The nexthop group itself
as well as its buckets are marked with hardware flags (i.e.,
'RTNH_F_TRAP').

Replacement of a single nexthop bucket can fail using the following
debugfs knob:

 # cat /sys/kernel/debug/netdevsim/netdevsim10/fib/fail_nexthop_bucket_replace
 N
 # echo 1 > /sys/kernel/debug/netdevsim/netdevsim10/fib/fail_nexthop_bucket_replace
 # cat /sys/kernel/debug/netdevsim/netdevsim10/fib/fail_nexthop_bucket_replace
 Y

Replacement of a resilient nexthop group can fail using the following
debugfs knob:

 # cat /sys/kernel/debug/netdevsim/netdevsim10/fib/fail_res_nexthop_group_replace
 N
 # echo 1 > /sys/kernel/debug/netdevsim/netdevsim10/fib/fail_res_nexthop_group_replace
 # cat /sys/kernel/debug/netdevsim/netdevsim10/fib/fail_res_nexthop_group_replace
 Y

This enables testing of various error paths.

Signed-off-by: Ido Schimmel 
Reviewed-by: Petr Machata 
Signed-off-by: Petr Machata 
Signed-off-by: David S. Miller

netdevsim: Create a helper for setting nexthop hardware flags

2021-03-13T01:44:10+00:00

Instead of calling nexthop_set_hw_flags(), call a helper. It will be
used to also set nexthop bucket flags in a subsequent patch.

Signed-off-by: Ido Schimmel 
Reviewed-by: Petr Machata 
Signed-off-by: Petr Machata 
Signed-off-by: David S. Miller

netdevsim: fib: Introduce a lock to guard nexthop hashtable

2021-03-13T01:44:10+00:00

Currently netdevsim relies on RTNL to maintain exclusivity in accessing the
nexthop hash table. However, bucket notification may be called without RTNL
having been held. Instead, introduce a custom lock to guard the table.

Signed-off-by: Petr Machata 
Reviewed-by: Ido Schimmel 
Signed-off-by: David S. Miller

netdevsim: fib: Remove redundant code

2021-03-11T22:32:48+00:00

Fix the following coccicheck warnings:

./drivers/net/netdevsim/fib.c:874:5-8: Unneeded variable: "err". Return
"0" on line 889.

Reported-by: Abaci Robot 
Signed-off-by: Jiapeng Chong 
Reviewed-by: Jakub Kicinski 
Signed-off-by: David S. Miller