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Date: Fri, 9 Oct 2015 08:41:41 +0200
From: Jiri Pirko <jiri@...nulli.us>
To: Premkumar Jonnala <pjonnala@...adcom.com>
Cc: "sfeldma@...il.com" <sfeldma@...il.com>,
"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
"davem@...emloft.net" <davem@...emloft.net>,
"siva.mannem.lnx@...il.com" <siva.mannem.lnx@...il.com>,
"stephen@...workplumber.org" <stephen@...workplumber.org>,
"roopa@...ulusnetworks.com" <roopa@...ulusnetworks.com>,
"andrew@...n.ch" <andrew@...n.ch>,
"f.fainelli@...il.com" <f.fainelli@...il.com>,
"vivien.didelot@...oirfairelinux.com"
<vivien.didelot@...oirfairelinux.com>
Subject: Re: [PATCH net-next v3 3/4] bridge: push bridge setting ageing_time
down to switchdev
Fri, Oct 09, 2015 at 06:38:10AM CEST, pjonnala@...adcom.com wrote:
>
>
>> -----Original Message-----
>> From: sfeldma@...il.com [mailto:sfeldma@...il.com]
>> Sent: Friday, October 09, 2015 7:53 AM
>> To: netdev@...r.kernel.org
>> Cc: davem@...emloft.net; jiri@...nulli.us; siva.mannem.lnx@...il.com;
>> Premkumar Jonnala; stephen@...workplumber.org;
>> roopa@...ulusnetworks.com; andrew@...n.ch; f.fainelli@...il.com;
>> vivien.didelot@...oirfairelinux.com
>> Subject: [PATCH net-next v3 3/4] bridge: push bridge setting ageing_time down
>> to switchdev
>>
>> From: Scott Feldman <sfeldma@...il.com>
>>
>> Use SWITCHDEV_F_SKIP_EOPNOTSUPP to skip over ports in bridge that don't
>> support setting ageing_time (or setting bridge attrs in general).
>>
>> If push fails, don't update ageing_time in bridge and return err to user.
>>
>> If push succeeds, update ageing_time in bridge and run gc_timer now to
>> recalabrate when to run gc_timer next, based on new ageing_time.
>>
>> Signed-off-by: Scott Feldman <sfeldma@...il.com>
>> Signed-off-by: Jiri Pirko <jiri@...nulli.us>
>> ---
>> net/bridge/br_ioctl.c | 3 +--
>> net/bridge/br_netlink.c | 6 +++---
>> net/bridge/br_private.h | 1 +
>> net/bridge/br_stp.c | 23 +++++++++++++++++++++++
>> net/bridge/br_sysfs_br.c | 3 +--
>> 5 files changed, 29 insertions(+), 7 deletions(-)
>>
>> diff --git a/net/bridge/br_ioctl.c b/net/bridge/br_ioctl.c
>> index 8d423bc..263b4de 100644
>> --- a/net/bridge/br_ioctl.c
>> +++ b/net/bridge/br_ioctl.c
>> @@ -200,8 +200,7 @@ static int old_dev_ioctl(struct net_device *dev, struct
>> ifreq *rq, int cmd)
>> if (!ns_capable(dev_net(dev)->user_ns, CAP_NET_ADMIN))
>> return -EPERM;
>>
>> - br->ageing_time = clock_t_to_jiffies(args[1]);
>> - return 0;
>> + return br_set_ageing_time(br, args[1]);
>>
>> case BRCTL_GET_PORT_INFO:
>> {
>> diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c
>> index d78b442..544ab96 100644
>> --- a/net/bridge/br_netlink.c
>> +++ b/net/bridge/br_netlink.c
>> @@ -870,9 +870,9 @@ static int br_changelink(struct net_device *brdev, struct
>> nlattr *tb[],
>> }
>>
>> if (data[IFLA_BR_AGEING_TIME]) {
>> - u32 ageing_time = nla_get_u32(data[IFLA_BR_AGEING_TIME]);
>> -
>> - br->ageing_time = clock_t_to_jiffies(ageing_time);
>> + err = br_set_ageing_time(br,
>> nla_get_u32(data[IFLA_BR_AGEING_TIME]));
>> + if (err)
>> + return err;
>> }
>>
>> if (data[IFLA_BR_STP_STATE]) {
>> diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
>> index 09d3ecb..ba0c67b 100644
>> --- a/net/bridge/br_private.h
>> +++ b/net/bridge/br_private.h
>> @@ -882,6 +882,7 @@ void __br_set_forward_delay(struct net_bridge *br,
>> unsigned long t);
>> int br_set_forward_delay(struct net_bridge *br, unsigned long x);
>> int br_set_hello_time(struct net_bridge *br, unsigned long x);
>> int br_set_max_age(struct net_bridge *br, unsigned long x);
>> +int br_set_ageing_time(struct net_bridge *br, u32 ageing_time);
>>
>>
>> /* br_stp_if.c */
>> diff --git a/net/bridge/br_stp.c b/net/bridge/br_stp.c
>> index 3a982c0..db6d243de 100644
>> --- a/net/bridge/br_stp.c
>> +++ b/net/bridge/br_stp.c
>> @@ -566,6 +566,29 @@ int br_set_max_age(struct net_bridge *br, unsigned
>> long val)
>>
>> }
>>
>> +int br_set_ageing_time(struct net_bridge *br, u32 ageing_time)
>> +{
>> + struct switchdev_attr attr = {
>> + .id = SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME,
>> + .flags = SWITCHDEV_F_SKIP_EOPNOTSUPP,
>> + .u.ageing_time = ageing_time,
>> + };
>> + unsigned long t = clock_t_to_jiffies(ageing_time);
>> + int err;
>> +
>> + if (t < BR_MIN_AGEING_TIME || t > BR_MAX_AGEING_TIME)
>> + return -ERANGE;
>> +
>> + err = switchdev_port_attr_set(br->dev, &attr);
>
>A thought - given that the ageing time is not a per-bridge-port attr, why are we using a "port based api"
>to pass the attribute down? May be I'm missing something here?
I general, it can be. And in case of rocker, it is.
Other drivers will just use port handler to set the ageing time on the
appropriate bridge.
>
>-Prem
>
>
>> + if (err)
>> + return err;
>> +
>> + br->ageing_time = t;
>> + mod_timer(&br->gc_timer, jiffies);
>> +
>> + return 0;
>> +}
>> +
>> void __br_set_forward_delay(struct net_bridge *br, unsigned long t)
>> {
>> br->bridge_forward_delay = t;
>> diff --git a/net/bridge/br_sysfs_br.c b/net/bridge/br_sysfs_br.c
>> index 4c97fc5..04ef192 100644
>> --- a/net/bridge/br_sysfs_br.c
>> +++ b/net/bridge/br_sysfs_br.c
>> @@ -102,8 +102,7 @@ static ssize_t ageing_time_show(struct device *d,
>>
>> static int set_ageing_time(struct net_bridge *br, unsigned long val)
>> {
>> - br->ageing_time = clock_t_to_jiffies(val);
>> - return 0;
>> + return br_set_ageing_time(br, val);
>> }
>>
>> static ssize_t ageing_time_store(struct device *d,
>> --
>> 1.7.10.4
>
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