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Date: Tue, 18 Aug 2015 07:55:55 +0200
From: Jiri Pirko <jiri@...nulli.us>
To: sfeldma@...il.com
Cc: netdev@...r.kernel.org
Subject: Re: [PATCH net-next v3] rocker: add debugfs support to dump internal
tables
Tue, Aug 18, 2015 at 12:36:17AM CEST, sfeldma@...il.com wrote:
>From: Scott Feldman <sfeldma@...il.com>
>
>> tree /sys/kernel/debug/rocker
>/sys/kernel/debug/rocker
>└── 5254001235010000
> ├── fdb_tbl
> ├── internal_vlan_tbl
> ├── neigh_tbl
> ├── of_dpa_flow_tbl
> └── of_dpa_group_tbl
>
>1 directory, 5 files
>
>> cat /sys/kernel/debug/rocker/5254001235010000/internal_vlan_tbl
>ifindex 5 ref_count 1 vlan 3843
>ifindex 7 ref_count 2 vlan 3840
>ifindex 4 ref_count 1 vlan 3842
>
>> cat /sys/kernel/debug/rocker/5254001235010000/fdb_tbl
>learned 1 pport 1 addr 00:02:00:00:02:00 vlan 3840
>learned 1 pport 2 addr 00:02:00:00:03:00 vlan 3840
>
>> cat /sys/kernel/debug/rocker/5254001235010000/neigh_tbl
>11.0.0.9 dev sw1p2 ref_count 3 index 1 dst 00:02:00:00:01:00 ttl_check 1
>11.0.0.1 dev sw1p1 ref_count 3 index 0 dst 00:02:00:00:00:00 ttl_check 1
>
>> cat /sys/kernel/debug/rocker/5254001235010000/of_dpa_flow_tbl
>cmd 3 cookie 15 priority 3 tbl acl in_pport 2 01:80:c2:00:00:00/ff:ff:ff:ff:ff:f0 eth_type 0x0000 vlan_id 3841 ip proto 0/0 ip tos 0/0 group_id 0x0f010000
>cmd 3 cookie 2 priority 0 tbl term_mac in_pport 1 eth_type 0x0800 52:54:00:12:35:01 vlan_id 3840 goto_tbl ucast_routing copy_to_cpu 0
>cmd 3 cookie 1f priority 3 tbl bridge 00:02:00:00:00:00 vlan_id 3840 tunnel_id 0 goto_tbl acl group_id 0x00000000 copy_to_cpu 0
>cmd 3 cookie 4 priority 1 tbl vlan in_pport 2 vlan_id 0 goto_tbl term_mac untagged 1 new_vlan_id 3841
>cmd 3 cookie 20 priority 0 tbl ucast_routing eth_type 0x0800 11.0.0.1 goto_tbl acl group_id 0x20000000
>cmd 3 cookie 21 priority 3 tbl bridge 00:02:00:00:01:00 vlan_id 3841 tunnel_id 0 goto_tbl acl group_id 0x00000000 copy_to_cpu 0
>cmd 3 cookie 16 priority 2 tbl acl in_pport 2 eth_type 0x0806 vlan_id 3841 ip proto 0/0 ip tos 0/0 group_id 0x0f010000
>cmd 3 cookie 12 priority 0 tbl ucast_routing eth_type 0x0800 11.0.0.0 goto_tbl acl group_id 0x0f000000
>cmd 3 cookie 9 priority 3 tbl acl in_pport 1 01:80:c2:00:00:00/ff:ff:ff:ff:ff:f0 eth_type 0x0000 vlan_id 3840 ip proto 0/0 ip tos 0/0 group_id 0x0f000000
>cmd 3 cookie 6 priority 0 tbl term_mac in_pport 2 eth_type 0x86dd 52:54:00:12:35:02 vlan_id 3841 goto_tbl ucast_routing copy_to_cpu 0
>cmd 4 cookie 0 priority 1 tbl ig_port in_pport 0/0xffff0000 goto_tbl vlan
>cmd 4 cookie e priority 0 tbl ucast_routing eth_type 0x0800 11.0.0.3 goto_tbl acl group_id 0x0f000000
>cmd 3 cookie 1 priority 1 tbl vlan in_pport 1 vlan_id 0 goto_tbl term_mac untagged 1 new_vlan_id 3840
>cmd 3 cookie 24 priority 20 tbl ucast_routing eth_type 0x0800 11.0.0.4/255.255.255.252 goto_tbl acl group_id 0x20000000
>cmd 4 cookie 14 priority 0 tbl ucast_routing eth_type 0x0800 11.0.0.10 goto_tbl acl group_id 0x0f010000
>cmd 3 cookie 2c priority 20 tbl ucast_routing eth_type 0x0800 12.0.0.4 goto_tbl acl group_id 0x20000001
>cmd 3 cookie 17 priority 1 tbl term_mac in_pport 2 eth_type 0x0800 01:00:5e:00:00:00/ff:ff:ff:80:00:00 vlan_id 3841 goto_tbl mcast_routing copy_to_cpu 1
>cmd 3 cookie 26 priority 20 tbl ucast_routing eth_type 0x0800 12.0.0.3 goto_tbl acl group_id 0x20000000
>cmd 3 cookie 2e priority 30 tbl ucast_routing eth_type 0x0800 12.0.0.2 goto_tbl acl group_id 0x0f010000
>cmd 3 cookie 22 priority 0 tbl ucast_routing eth_type 0x0800 11.0.0.9 goto_tbl acl group_id 0x20000001
>cmd 3 cookie 1c priority 0 tbl ucast_routing eth_type 0x0800 11.0.0.8/255.255.255.252 goto_tbl acl group_id 0x0f010000
>cmd 3 cookie 18 priority 1 tbl term_mac in_pport 2 eth_type 0x86dd 33:33:00:00:00:00/ff:ff:00:00:00:00 vlan_id 3841 goto_tbl mcast_routing copy_to_cpu 1
>cmd 3 cookie 5 priority 0 tbl term_mac in_pport 2 eth_type 0x0800 52:54:00:12:35:02 vlan_id 3841 goto_tbl ucast_routing copy_to_cpu 0
>cmd 3 cookie a priority 2 tbl acl in_pport 1 eth_type 0x0806 vlan_id 3840 ip proto 0/0 ip tos 0/0 group_id 0x0f000000
>cmd 4 cookie 1a priority 0 tbl ucast_routing eth_type 0x0800 11.0.0.11 goto_tbl acl group_id 0x0f010000
>cmd 3 cookie 1e priority 0 tbl ucast_routing eth_type 0x0800 11.0.0.8 goto_tbl acl group_id 0x0f010000
>cmd 3 cookie 3 priority 0 tbl term_mac in_pport 1 eth_type 0x86dd 52:54:00:12:35:01 vlan_id 3840 goto_tbl ucast_routing copy_to_cpu 0
>cmd 3 cookie b priority 1 tbl term_mac in_pport 1 eth_type 0x0800 01:00:5e:00:00:00/ff:ff:ff:80:00:00 vlan_id 3840 goto_tbl mcast_routing copy_to_cpu 1
>cmd 4 cookie 8 priority 0 tbl ucast_routing eth_type 0x0800 11.0.0.2 goto_tbl acl group_id 0x0f000000
>cmd 3 cookie 10 priority 0 tbl ucast_routing eth_type 0x0800 11.0.0.0/255.255.255.252 goto_tbl acl group_id 0x0f000000
>cmd 3 cookie 28 priority 20 tbl ucast_routing eth_type 0x0800 11.0.0.12/255.255.255.252 goto_tbl acl group_id 0x20000001
>cmd 3 cookie c priority 1 tbl term_mac in_pport 1 eth_type 0x86dd 33:33:00:00:00:00/ff:ff:00:00:00:00 vlan_id 3840 goto_tbl mcast_routing copy_to_cpu 1
>
>> cat /sys/kernel/debug/rocker/5254001235010000/of_dpa_group_tbl
>cmd 7 group_id 0x0f000000 (L2 interface vlan 3840 port 0) pop_vlan 1
>cmd 7 group_id 0x0f010000 (L2 interface vlan 3841 port 0) pop_vlan 1
>cmd 7 group_id 0x20000000 (L3 unicast index 0) src 52:54:00:12:35:01 dst 00:02:00:00:00:00 vlan 3840 ttl_check 1 group_id 0x0f000001
>cmd 7 group_id 0x0f010002 (L2 interface vlan 3841 port 2) pop_vlan 1
>cmd 7 group_id 0x0f000001 (L2 interface vlan 3840 port 1) pop_vlan 1
>cmd 8 group_id 0x20000001 (L3 unicast index 1) src 52:54:00:12:35:02 dst 00:02:00:00:01:00 vlan 3841 ttl_check 1 group_id 0x0f010002
>
>Signed-off-by: Scott Feldman <sfeldma@...il.com>
>---
>v3: undo v2 change: Jiri is right: debugfs calls are no-ops when
> CONFIG_DEBUG_FS=n so we don't need to do anything extra in the
> CONFIG_DEBUG_FS=n case. v3 has adds a few wrapper funcs around the
> debugfs calls to keep mainline funcs clean, so let's go with this
> version over v1.
>
>v2: wrap feature with CONFIG_ROCKER_DEBUGFS to allow config-time
> enable/disable
>
> drivers/net/ethernet/rocker/rocker.c | 379 ++++++++++++++++++++++++++++++++++
> drivers/net/ethernet/rocker/rocker.h | 2 +-
> 2 files changed, 380 insertions(+), 1 deletion(-)
>
<snip>
>+static int rocker_probe_debugfs_init(struct rocker *rocker)
>+{
>+ char dbg_dir_name[sizeof(rocker->hw.id) * 2 + 1];
>+
>+ sprintf(dbg_dir_name, "%*phN", (int)sizeof(rocker->hw.id),
>+ &rocker->hw.id);
You can use PCI address here. Might be better.
>+ rocker->dbg_dir = debugfs_create_dir(dbg_dir_name, rocker_dbg_root);
>+ if (!rocker->dbg_dir)
You still check the retval here and
>+ return -ENOMEM;
>+ return 0;
>+}
>+
<snip>
>+static int rocker_debugfs_init(void)
>+{
>+ rocker_dbg_root = debugfs_create_dir(rocker_driver_name, NULL);
>+ if (!rocker_dbg_root)
here. When debugfs is not enabled, init will fail.
--
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