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Date: Sat, 28 Dec 2013 22:30:45 +0100
From: Jiri Pirko <jiri@...nulli.us>
To: Scott Feldman <sfeldma@...ulusnetworks.com>
Cc: vfalico@...hat.com, fubar@...ibm.com, andy@...yhouse.net,
netdev@...r.kernel.org, roopa@...ulusnetworks.com,
shm@...ulusnetworks.com
Subject: Re: [PATCH net-next 2/4] bonding: add ad_select attribute netlink
support
Sat, Dec 28, 2013 at 08:15:48AM CET, sfeldma@...ulusnetworks.com wrote:
>Add IFLA_BOND_AD_SELECT to allow get/set of bonding parameter
>ad_select via netlink.
>
>Signed-off-by: Scott Feldman <sfeldma@...ulusnetworks.com>
>---
> drivers/net/bonding/bond_netlink.c | 14 ++++++++++++++
> drivers/net/bonding/bond_options.c | 22 ++++++++++++++++++++++
> drivers/net/bonding/bond_sysfs.c | 29 ++++++++++++-----------------
> drivers/net/bonding/bonding.h | 1 +
> include/uapi/linux/if_link.h | 1 +
> 5 files changed, 50 insertions(+), 17 deletions(-)
>
>diff --git a/drivers/net/bonding/bond_netlink.c b/drivers/net/bonding/bond_netlink.c
>index 45de873..df66dd8 100644
>--- a/drivers/net/bonding/bond_netlink.c
>+++ b/drivers/net/bonding/bond_netlink.c
>@@ -44,6 +44,7 @@ static const struct nla_policy bond_policy[IFLA_BOND_MAX + 1] = {
> [IFLA_BOND_LP_INTERVAL] = { .type = NLA_U32 },
> [IFLA_BOND_PACKETS_PER_SLAVE] = { .type = NLA_U32 },
> [IFLA_BOND_AD_LACP_RATE] = { .type = NLA_U8 },
>+ [IFLA_BOND_AD_SELECT] = { .type = NLA_U8 },
> };
>
> static int bond_validate(struct nlattr *tb[], struct nlattr *data[])
>@@ -261,6 +262,14 @@ static int bond_changelink(struct net_device *bond_dev,
> if (err)
> return err;
> }
>+ if (data[IFLA_BOND_AD_SELECT]) {
>+ int ad_select =
>+ nla_get_u8(data[IFLA_BOND_AD_SELECT]);
>+
>+ err = bond_option_ad_select_set(bond, ad_select);
>+ if (err)
>+ return err;
>+ }
> return 0;
> }
>
>@@ -300,6 +309,7 @@ static size_t bond_get_size(const struct net_device *bond_dev)
> nla_total_size(sizeof(u32)) + /* IFLA_BOND_LP_INTERVAL */
> nla_total_size(sizeof(u32)) + /* IFLA_BOND_PACKETS_PER_SLAVE */
> nla_total_size(sizeof(u8)) + /* IFLA_BOND_AD_LACP_RATE */
>+ nla_total_size(sizeof(u8)) + /* IFLA_BOND_AD_SELECT */
> 0;
> }
>
>@@ -409,6 +419,10 @@ static int bond_fill_info(struct sk_buff *skb,
> bond->params.lacp_fast))
> goto nla_put_failure;
>
>+ if (nla_put_u8(skb, IFLA_BOND_AD_SELECT,
>+ bond->params.ad_select))
>+ goto nla_put_failure;
>+
> return 0;
>
> nla_put_failure:
>diff --git a/drivers/net/bonding/bond_options.c b/drivers/net/bonding/bond_options.c
>index ad67fbf..6fdb8c0 100644
>--- a/drivers/net/bonding/bond_options.c
>+++ b/drivers/net/bonding/bond_options.c
>@@ -685,3 +685,25 @@ int bond_option_lacp_rate_set(struct bonding *bond, int lacp_rate)
>
> return 0;
> }
>+
>+int bond_option_ad_select_set(struct bonding *bond, int ad_select)
>+{
>+ if (bond->dev->flags & IFF_UP) {
>+ pr_err("%s: Unable to update ad_select because interface is up.\n",
>+ bond->dev->name);
>+ return -EPERM;
>+ }
>+
>+ if (1 <= ad_select && ad_select <= 3) {
I do not like this. I think that we should do something like bond_parse_parm
somehow. Maybe to make a split of bond_parse_parm into multiple
function so we can pass int to it?
>+ bond->params.ad_select = ad_select;
>+ pr_info("%s: Setting ad_select to %s (%d).\n",
>+ bond->dev->name, ad_select_tbl[ad_select].modename,
>+ ad_select);
>+ } else {
>+ pr_err("%s: Ignoring invalid ad_select value %d.\n",
>+ bond->dev->name, ad_select);
>+ return -EINVAL;
>+ }
>+
>+ return 0;
>+}
>diff --git a/drivers/net/bonding/bond_sysfs.c b/drivers/net/bonding/bond_sysfs.c
>index 62d33dc..9a1ea4a 100644
>--- a/drivers/net/bonding/bond_sysfs.c
>+++ b/drivers/net/bonding/bond_sysfs.c
>@@ -733,29 +733,24 @@ static ssize_t bonding_store_ad_select(struct device *d,
> struct device_attribute *attr,
> const char *buf, size_t count)
> {
>- int new_value, ret = count;
>+ int new_value, ret;
> struct bonding *bond = to_bond(d);
>
>- if (bond->dev->flags & IFF_UP) {
>- pr_err("%s: Unable to update ad_select because interface is up.\n",
>- bond->dev->name);
>- ret = -EPERM;
>- goto out;
>- }
>-
> new_value = bond_parse_parm(buf, ad_select_tbl);
>-
>- if (new_value != -1) {
>- bond->params.ad_select = new_value;
>- pr_info("%s: Setting ad_select to %s (%d).\n",
>- bond->dev->name, ad_select_tbl[new_value].modename,
>- new_value);
>- } else {
>+ if (new_value < 0) {
> pr_err("%s: Ignoring invalid ad_select value %.*s.\n",
> bond->dev->name, (int)strlen(buf) - 1, buf);
>- ret = -EINVAL;
>+ return -EINVAL;
> }
>-out:
>+
>+ if (!rtnl_trylock())
>+ return restart_syscall();
>+
>+ ret = bond_option_ad_select_set(bond, new_value);
>+ if (!ret)
>+ ret = count;
>+
>+ rtnl_unlock();
> return ret;
> }
> static DEVICE_ATTR(ad_select, S_IRUGO | S_IWUSR,
>diff --git a/drivers/net/bonding/bonding.h b/drivers/net/bonding/bonding.h
>index ef93667..3dec554 100644
>--- a/drivers/net/bonding/bonding.h
>+++ b/drivers/net/bonding/bonding.h
>@@ -469,6 +469,7 @@ int bond_option_lp_interval_set(struct bonding *bond, int min_links);
> int bond_option_packets_per_slave_set(struct bonding *bond,
> int packets_per_slave);
> int bond_option_lacp_rate_set(struct bonding *bond, int lacp_rate);
>+int bond_option_ad_select_set(struct bonding *bond, int ad_select);
> struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond);
> struct net_device *bond_option_active_slave_get(struct bonding *bond);
>
>diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h
>index 0f8f38f..0fbb018 100644
>--- a/include/uapi/linux/if_link.h
>+++ b/include/uapi/linux/if_link.h
>@@ -350,6 +350,7 @@ enum {
> IFLA_BOND_LP_INTERVAL,
> IFLA_BOND_PACKETS_PER_SLAVE,
> IFLA_BOND_AD_LACP_RATE,
>+ IFLA_BOND_AD_SELECT,
> __IFLA_BOND_MAX,
> };
>
>
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