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Date: Fri, 22 Nov 2013 13:07:40 -0600
From: Dan Williams <dcbw@...hat.com>
To: Ding Tianhong <dingtianhong@...wei.com>
Cc: Andy Gospodarek <andy@...yhouse.net>,
David Miller <davem@...emloft.net>, fubar@...ibm.com,
nikolay@...hat.com, vfalico@...hat.com, netdev@...r.kernel.org
Subject: Re: [PATCH net v3] bonding: disable arp and enable mii monitoring
when bond change to no uses arp mode
On Fri, 2013-11-22 at 22:28 +0800, Ding Tianhong wrote:
> Because the ARP monitoring is not support for 802.3ad, but I still
> could change the mode to 802.3ad from ab mode while ARP monitoring
> is running, it is incorrect.
>
> So add a check for 802.3ad in bonding_store_mode to fix the problem,
> and make a new macro BOND_NO_USES_ARP() to simplify the code.
Excellent, that's exactly what I was thinking of. Thanks!
Dan
> v2: according to the Dan Williams's suggestion, bond mode is the most
> important bond option, it should override any of the other sub-options.
> So when the mode is changed, the conficting values should be cleared
> or reset, otherwise the user has to duplicate more operations to modify
> the logic. I disable the arp and enable mii monitoring when the bond mode
> is changed to AB, TB and 8023AD if the arp interval is true.
>
> v3: according to the Nik's suggestion, the default value of miimon should need
> a name, there is several place to use it, and the bond_store_arp_interval()
> could use micro BOND_NO_USES_ARP to make the code more simpify.
>
> Suggested-by: Dan Williams <dcbw@...hat.com>
> Suggested-by: Nikolay Aleksandrov <nikolay@...hat.com>
> Signed-off-by: Ding Tianhong <dingtianhong@...wei.com>
> ---
> drivers/net/bonding/bond_main.c | 4 ++--
> drivers/net/bonding/bond_options.c | 13 +++++++++----
> drivers/net/bonding/bond_sysfs.c | 4 +---
> drivers/net/bonding/bonding.h | 7 +++++++
> 4 files changed, 19 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
> index 4dd5ee2..36eab0c 100644
> --- a/drivers/net/bonding/bond_main.c
> +++ b/drivers/net/bonding/bond_main.c
> @@ -4110,7 +4110,7 @@ static int bond_check_params(struct bond_params *params)
> if (!miimon) {
> pr_warning("Warning: miimon must be specified, otherwise bonding will not detect link failure, speed and duplex which are essential for 802.3ad operation\n");
> pr_warning("Forcing miimon to 100msec\n");
> - miimon = 100;
> + miimon = BOND_DEFAULT_MIIMON;
> }
> }
>
> @@ -4147,7 +4147,7 @@ static int bond_check_params(struct bond_params *params)
> if (!miimon) {
> pr_warning("Warning: miimon must be specified, otherwise bonding will not detect link failure and link speed which are essential for TLB/ALB load balancing\n");
> pr_warning("Forcing miimon to 100msec\n");
> - miimon = 100;
> + miimon = BOND_DEFAULT_MIIMON;
> }
> }
>
> diff --git a/drivers/net/bonding/bond_options.c b/drivers/net/bonding/bond_options.c
> index 9a5223c..ea6f640 100644
> --- a/drivers/net/bonding/bond_options.c
> +++ b/drivers/net/bonding/bond_options.c
> @@ -45,10 +45,15 @@ int bond_option_mode_set(struct bonding *bond, int mode)
> return -EPERM;
> }
>
> - if (BOND_MODE_IS_LB(mode) && bond->params.arp_interval) {
> - pr_err("%s: %s mode is incompatible with arp monitoring.\n",
> - bond->dev->name, bond_mode_tbl[mode].modename);
> - return -EINVAL;
> + if (BOND_NO_USES_ARP(mode) && bond->params.arp_interval) {
> + pr_info("%s: %s mode is incompatible with arp monitoring, start mii monitoring\n",
> + bond->dev->name, bond_mode_tbl[mode].modename);
> + /* disable arp monitoring */
> + bond->params.arp_interval = 0;
> + /* set miimon to default value */
> + bond->params.miimon = BOND_DEFAULT_MIIMON;
> + pr_info("%s: Setting MII monitoring interval to %d.\n",
> + bond->dev->name, bond->params.miimon);
> }
>
> /* don't cache arp_validate between modes */
> diff --git a/drivers/net/bonding/bond_sysfs.c b/drivers/net/bonding/bond_sysfs.c
> index 0ec2a7e..abf5e10 100644
> --- a/drivers/net/bonding/bond_sysfs.c
> +++ b/drivers/net/bonding/bond_sysfs.c
> @@ -523,9 +523,7 @@ static ssize_t bonding_store_arp_interval(struct device *d,
> ret = -EINVAL;
> goto out;
> }
> - if (bond->params.mode == BOND_MODE_ALB ||
> - bond->params.mode == BOND_MODE_TLB ||
> - bond->params.mode == BOND_MODE_8023AD) {
> + if (BOND_NO_USES_ARP(bond->params.mode)) {
> pr_info("%s: ARP monitoring cannot be used with ALB/TLB/802.3ad. Only MII monitoring is supported on %s.\n",
> bond->dev->name, bond->dev->name);
> ret = -EINVAL;
> diff --git a/drivers/net/bonding/bonding.h b/drivers/net/bonding/bonding.h
> index ca31286..a9f4f9f 100644
> --- a/drivers/net/bonding/bonding.h
> +++ b/drivers/net/bonding/bonding.h
> @@ -35,6 +35,8 @@
>
> #define BOND_MAX_ARP_TARGETS 16
>
> +#define BOND_DEFAULT_MIIMON 100
> +
> #define IS_UP(dev) \
> ((((dev)->flags & IFF_UP) == IFF_UP) && \
> netif_running(dev) && \
> @@ -55,6 +57,11 @@
> ((mode) == BOND_MODE_TLB) || \
> ((mode) == BOND_MODE_ALB))
>
> +#define BOND_NO_USES_ARP(mode) \
> + (((mode) == BOND_MODE_8023AD) || \
> + ((mode) == BOND_MODE_TLB) || \
> + ((mode) == BOND_MODE_ALB))
> +
> #define TX_QUEUE_OVERRIDE(mode) \
> (((mode) == BOND_MODE_ACTIVEBACKUP) || \
> ((mode) == BOND_MODE_ROUNDROBIN))
--
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