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Message-ID: <dffd68fa-66bf-7709-7df7-7aa5e0e2ed44@redhat.com>
Date: Tue, 13 Jun 2017 12:42:18 -0400
From: Jonathan Toppins <jtoppins@...hat.com>
To: Joe Perches <joe@...ches.com>, David Miller <davem@...emloft.net>,
michael.j.dilmore@...il.com
Cc: j.vosburgh@...il.com, vfalico@...il.com, andy@...yhouse.net,
netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
nikolay@...ulusnetworks.com
Subject: Re: [PATCH] Add printk for bonding module packets_per_slave parameter
On 06/13/2017 12:21 PM, Joe Perches wrote:
> On Tue, 2017-06-13 at 11:34 -0400, David Miller wrote:
>> From: Michael Dilmore <michael.j.dilmore@...il.com>
>> Date: Tue, 13 Jun 2017 14:42:46 +0100
>>
>>> The packets per slave parameter used by round robin mode does not have a printk debug
>>> message in its set function in bond_options.c. Adding such a function would aid debugging
>>> of round-robin mode and allow the user to more easily verify that the parameter has been
>>> set correctly. I should add that I'm motivated by my own experience here - it's not
>>> obvious from output of tools such as wireshark and ifstat that the parameter is working
>>> correctly, and with the differences in bonding configuration across different distributions,
>>> it would have been comforting to see this output.
>>>
>>> Signed-off-by: Michael Dilmore <michael.j.dilmore@...il.com>
>>>
>>> cc: Veaceslav Falico <vfalico@...il.com>,Andy Gospodarek <andy@...yhouse.net>,netdev@...r.kernel.org,linux-kernel@...r.kernel.org
>>
>> You can verify things by simplying reading the value back.
>>
>> If every parameter emitted a kernel log message, it would be
>> unreadable.
>>
>> I'm not applying this, sorry.
>
> I agree. Noisy logging output is not good.
>
> Perhaps a general conversion of the dozens
> of existing netdev_info uses in this file to
> netdev_dbg and adding this at netdev_dbg is
> appropriate.
In general I agree. The few times I have debugged bonds, I always ended
up enabling debug prinks anyway. I don't see a problem moving these to
debug as well.
Adding nik whom converted a lot of this code to common paths for input.
>
> Something like:
> ---
> drivers/net/bonding/bond_options.c | 119 +++++++++++++++++++------------------
> 1 file changed, 60 insertions(+), 59 deletions(-)
>
> diff --git a/drivers/net/bonding/bond_options.c b/drivers/net/bonding/bond_options.c
> index 8ca683396fcc..9dec49b1b8ae 100644
> --- a/drivers/net/bonding/bond_options.c
> +++ b/drivers/net/bonding/bond_options.c
> @@ -750,8 +750,8 @@ static int bond_option_mode_set(struct bonding *bond,
> bond->params.arp_interval = 0;
> /* set miimon to default value */
> bond->params.miimon = BOND_DEFAULT_MIIMON;
> - netdev_info(bond->dev, "Setting MII monitoring interval to %d\n",
> - bond->params.miimon);
> + netdev_dbg(bond->dev, "Setting MII monitoring interval to %d\n",
> + bond->params.miimon);
> }
>
> /* don't cache arp_validate between modes */
> @@ -794,7 +794,7 @@ static int bond_option_active_slave_set(struct bonding *bond,
> block_netpoll_tx();
> /* check to see if we are clearing active */
> if (!slave_dev) {
> - netdev_info(bond->dev, "Clearing current active slave\n");
> + netdev_dbg(bond->dev, "Clearing current active slave\n");
> RCU_INIT_POINTER(bond->curr_active_slave, NULL);
> bond_select_active_slave(bond);
> } else {
> @@ -805,13 +805,13 @@ static int bond_option_active_slave_set(struct bonding *bond,
>
> if (new_active == old_active) {
> /* do nothing */
> - netdev_info(bond->dev, "%s is already the current active slave\n",
> - new_active->dev->name);
> + netdev_dbg(bond->dev, "%s is already the current active slave\n",
> + new_active->dev->name);
> } else {
> if (old_active && (new_active->link == BOND_LINK_UP) &&
> bond_slave_is_up(new_active)) {
> - netdev_info(bond->dev, "Setting %s as active slave\n",
> - new_active->dev->name);
> + netdev_dbg(bond->dev, "Setting %s as active slave\n",
> + new_active->dev->name);
> bond_change_active_slave(bond, new_active);
> } else {
> netdev_err(bond->dev, "Could not set %s as active slave; either %s is down or the link is down\n",
> @@ -833,17 +833,17 @@ static int bond_option_active_slave_set(struct bonding *bond,
> static int bond_option_miimon_set(struct bonding *bond,
> const struct bond_opt_value *newval)
> {
> - netdev_info(bond->dev, "Setting MII monitoring interval to %llu\n",
> - newval->value);
> + netdev_dbg(bond->dev, "Setting MII monitoring interval to %llu\n",
> + newval->value);
> bond->params.miimon = newval->value;
> if (bond->params.updelay)
> - netdev_info(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
> - bond->params.updelay * bond->params.miimon);
> + netdev_dbg(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
> + bond->params.updelay * bond->params.miimon);
> if (bond->params.downdelay)
> - netdev_info(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
> - bond->params.downdelay * bond->params.miimon);
> + netdev_dbg(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
> + bond->params.downdelay * bond->params.miimon);
> if (newval->value && bond->params.arp_interval) {
> - netdev_info(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n");
> + netdev_dbg(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n");
> bond->params.arp_interval = 0;
> if (bond->params.arp_validate)
> bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
> @@ -885,8 +885,8 @@ static int bond_option_updelay_set(struct bonding *bond,
> bond->params.miimon);
> }
> bond->params.updelay = value / bond->params.miimon;
> - netdev_info(bond->dev, "Setting up delay to %d\n",
> - bond->params.updelay * bond->params.miimon);
> + netdev_dbg(bond->dev, "Setting up delay to %d\n",
> + bond->params.updelay * bond->params.miimon);
>
> return 0;
> }
> @@ -907,8 +907,8 @@ static int bond_option_downdelay_set(struct bonding *bond,
> bond->params.miimon);
> }
> bond->params.downdelay = value / bond->params.miimon;
> - netdev_info(bond->dev, "Setting down delay to %d\n",
> - bond->params.downdelay * bond->params.miimon);
> + netdev_dbg(bond->dev, "Setting down delay to %d\n",
> + bond->params.downdelay * bond->params.miimon);
>
> return 0;
> }
> @@ -916,8 +916,7 @@ static int bond_option_downdelay_set(struct bonding *bond,
> static int bond_option_use_carrier_set(struct bonding *bond,
> const struct bond_opt_value *newval)
> {
> - netdev_info(bond->dev, "Setting use_carrier to %llu\n",
> - newval->value);
> + netdev_dbg(bond->dev, "Setting use_carrier to %llu\n", newval->value);
> bond->params.use_carrier = newval->value;
>
> return 0;
> @@ -930,16 +929,16 @@ static int bond_option_use_carrier_set(struct bonding *bond,
> static int bond_option_arp_interval_set(struct bonding *bond,
> const struct bond_opt_value *newval)
> {
> - netdev_info(bond->dev, "Setting ARP monitoring interval to %llu\n",
> - newval->value);
> + netdev_dbg(bond->dev, "Setting ARP monitoring interval to %llu\n",
> + newval->value);
> bond->params.arp_interval = newval->value;
> if (newval->value) {
> if (bond->params.miimon) {
> - netdev_info(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n");
> + netdev_dbg(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n");
> bond->params.miimon = 0;
> }
> if (!bond->params.arp_targets[0])
> - netdev_info(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n");
> + netdev_dbg(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n");
> }
> if (bond->dev->flags & IFF_UP) {
> /* If the interface is up, we may need to fire off
> @@ -1000,7 +999,7 @@ static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
> return -EINVAL;
> }
>
> - netdev_info(bond->dev, "Adding ARP target %pI4\n", &target);
> + netdev_dbg(bond->dev, "Adding ARP target %pI4\n", &target);
>
> _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
>
> @@ -1036,7 +1035,7 @@ static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
> if (ind == 0 && !targets[1] && bond->params.arp_interval)
> netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
>
> - netdev_info(bond->dev, "Removing ARP target %pI4\n", &target);
> + netdev_dbg(bond->dev, "Removing ARP target %pI4\n", &target);
>
> bond_for_each_slave(bond, slave, iter) {
> targets_rx = slave->target_last_arp_rx;
> @@ -1088,8 +1087,8 @@ static int bond_option_arp_ip_targets_set(struct bonding *bond,
> static int bond_option_arp_validate_set(struct bonding *bond,
> const struct bond_opt_value *newval)
> {
> - netdev_info(bond->dev, "Setting arp_validate to %s (%llu)\n",
> - newval->string, newval->value);
> + netdev_dbg(bond->dev, "Setting arp_validate to %s (%llu)\n",
> + newval->string, newval->value);
>
> if (bond->dev->flags & IFF_UP) {
> if (!newval->value)
> @@ -1105,8 +1104,8 @@ static int bond_option_arp_validate_set(struct bonding *bond,
> static int bond_option_arp_all_targets_set(struct bonding *bond,
> const struct bond_opt_value *newval)
> {
> - netdev_info(bond->dev, "Setting arp_all_targets to %s (%llu)\n",
> - newval->string, newval->value);
> + netdev_dbg(bond->dev, "Setting arp_all_targets to %s (%llu)\n",
> + newval->string, newval->value);
> bond->params.arp_all_targets = newval->value;
>
> return 0;
> @@ -1126,7 +1125,7 @@ static int bond_option_primary_set(struct bonding *bond,
> *p = '\0';
> /* check to see if we are clearing primary */
> if (!strlen(primary)) {
> - netdev_info(bond->dev, "Setting primary slave to None\n");
> + netdev_dbg(bond->dev, "Setting primary slave to None\n");
> RCU_INIT_POINTER(bond->primary_slave, NULL);
> memset(bond->params.primary, 0, sizeof(bond->params.primary));
> bond_select_active_slave(bond);
> @@ -1135,8 +1134,8 @@ static int bond_option_primary_set(struct bonding *bond,
>
> bond_for_each_slave(bond, slave, iter) {
> if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
> - netdev_info(bond->dev, "Setting %s as primary slave\n",
> - slave->dev->name);
> + netdev_dbg(bond->dev, "Setting %s as primary slave\n",
> + slave->dev->name);
> rcu_assign_pointer(bond->primary_slave, slave);
> strcpy(bond->params.primary, slave->dev->name);
> bond_select_active_slave(bond);
> @@ -1145,15 +1144,15 @@ static int bond_option_primary_set(struct bonding *bond,
> }
>
> if (rtnl_dereference(bond->primary_slave)) {
> - netdev_info(bond->dev, "Setting primary slave to None\n");
> + netdev_dbg(bond->dev, "Setting primary slave to None\n");
> RCU_INIT_POINTER(bond->primary_slave, NULL);
> bond_select_active_slave(bond);
> }
> strncpy(bond->params.primary, primary, IFNAMSIZ);
> bond->params.primary[IFNAMSIZ - 1] = 0;
>
> - netdev_info(bond->dev, "Recording %s as primary, but it has not been enslaved to %s yet\n",
> - primary, bond->dev->name);
> + netdev_dbg(bond->dev, "Recording %s as primary, but it has not been enslaved to %s yet\n",
> + primary, bond->dev->name);
>
> out:
> unblock_netpoll_tx();
> @@ -1164,8 +1163,8 @@ static int bond_option_primary_set(struct bonding *bond,
> static int bond_option_primary_reselect_set(struct bonding *bond,
> const struct bond_opt_value *newval)
> {
> - netdev_info(bond->dev, "Setting primary_reselect to %s (%llu)\n",
> - newval->string, newval->value);
> + netdev_dbg(bond->dev, "Setting primary_reselect to %s (%llu)\n",
> + newval->string, newval->value);
> bond->params.primary_reselect = newval->value;
>
> block_netpoll_tx();
> @@ -1178,8 +1177,8 @@ static int bond_option_primary_reselect_set(struct bonding *bond,
> static int bond_option_fail_over_mac_set(struct bonding *bond,
> const struct bond_opt_value *newval)
> {
> - netdev_info(bond->dev, "Setting fail_over_mac to %s (%llu)\n",
> - newval->string, newval->value);
> + netdev_dbg(bond->dev, "Setting fail_over_mac to %s (%llu)\n",
> + newval->string, newval->value);
> bond->params.fail_over_mac = newval->value;
>
> return 0;
> @@ -1188,8 +1187,8 @@ static int bond_option_fail_over_mac_set(struct bonding *bond,
> static int bond_option_xmit_hash_policy_set(struct bonding *bond,
> const struct bond_opt_value *newval)
> {
> - netdev_info(bond->dev, "Setting xmit hash policy to %s (%llu)\n",
> - newval->string, newval->value);
> + netdev_dbg(bond->dev, "Setting xmit hash policy to %s (%llu)\n",
> + newval->string, newval->value);
> bond->params.xmit_policy = newval->value;
>
> return 0;
> @@ -1198,8 +1197,8 @@ static int bond_option_xmit_hash_policy_set(struct bonding *bond,
> static int bond_option_resend_igmp_set(struct bonding *bond,
> const struct bond_opt_value *newval)
> {
> - netdev_info(bond->dev, "Setting resend_igmp to %llu\n",
> - newval->value);
> + netdev_dbg(bond->dev, "Setting resend_igmp to %llu\n",
> + newval->value);
> bond->params.resend_igmp = newval->value;
>
> return 0;
> @@ -1237,8 +1236,8 @@ static int bond_option_all_slaves_active_set(struct bonding *bond,
> static int bond_option_min_links_set(struct bonding *bond,
> const struct bond_opt_value *newval)
> {
> - netdev_info(bond->dev, "Setting min links value to %llu\n",
> - newval->value);
> + netdev_dbg(bond->dev, "Setting min links value to %llu\n",
> + newval->value);
> bond->params.min_links = newval->value;
> bond_set_carrier(bond);
>
> @@ -1256,6 +1255,8 @@ static int bond_option_lp_interval_set(struct bonding *bond,
> static int bond_option_pps_set(struct bonding *bond,
> const struct bond_opt_value *newval)
> {
> + netdev_dbg(bond->dev, "Setting packets per slave to %d\n",
> + newval->value);
> bond->params.packets_per_slave = newval->value;
> if (newval->value > 0) {
> bond->params.reciprocal_packets_per_slave =
> @@ -1274,8 +1275,8 @@ static int bond_option_pps_set(struct bonding *bond,
> static int bond_option_lacp_rate_set(struct bonding *bond,
> const struct bond_opt_value *newval)
> {
> - netdev_info(bond->dev, "Setting LACP rate to %s (%llu)\n",
> - newval->string, newval->value);
> + netdev_dbg(bond->dev, "Setting LACP rate to %s (%llu)\n",
> + newval->string, newval->value);
> bond->params.lacp_fast = newval->value;
> bond_3ad_update_lacp_rate(bond);
>
> @@ -1285,8 +1286,8 @@ static int bond_option_lacp_rate_set(struct bonding *bond,
> static int bond_option_ad_select_set(struct bonding *bond,
> const struct bond_opt_value *newval)
> {
> - netdev_info(bond->dev, "Setting ad_select to %s (%llu)\n",
> - newval->string, newval->value);
> + netdev_dbg(bond->dev, "Setting ad_select to %s (%llu)\n",
> + newval->string, newval->value);
> bond->params.ad_select = newval->value;
>
> return 0;
> @@ -1377,12 +1378,12 @@ static int bond_option_slaves_set(struct bonding *bond,
>
> switch (command[0]) {
> case '+':
> - netdev_info(bond->dev, "Adding slave %s\n", dev->name);
> + netdev_dbg(bond->dev, "Adding slave %s\n", dev->name);
> ret = bond_enslave(bond->dev, dev);
> break;
>
> case '-':
> - netdev_info(bond->dev, "Removing slave %s\n", dev->name);
> + netdev_dbg(bond->dev, "Removing slave %s\n", dev->name);
> ret = bond_release(bond->dev, dev);
> break;
>
> @@ -1402,8 +1403,8 @@ static int bond_option_slaves_set(struct bonding *bond,
> static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
> const struct bond_opt_value *newval)
> {
> - netdev_info(bond->dev, "Setting dynamic-lb to %s (%llu)\n",
> - newval->string, newval->value);
> + netdev_dbg(bond->dev, "Setting dynamic-lb to %s (%llu)\n",
> + newval->string, newval->value);
> bond->params.tlb_dynamic_lb = newval->value;
>
> return 0;
> @@ -1412,8 +1413,8 @@ static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
> static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
> const struct bond_opt_value *newval)
> {
> - netdev_info(bond->dev, "Setting ad_actor_sys_prio to %llu\n",
> - newval->value);
> + netdev_dbg(bond->dev, "Setting ad_actor_sys_prio to %llu\n",
> + newval->value);
>
> bond->params.ad_actor_sys_prio = newval->value;
> bond_3ad_update_ad_actor_settings(bond);
> @@ -1442,7 +1443,7 @@ static int bond_option_ad_actor_system_set(struct bonding *bond,
> if (!is_valid_ether_addr(mac))
> goto err;
>
> - netdev_info(bond->dev, "Setting ad_actor_system to %pM\n", mac);
> + netdev_dbg(bond->dev, "Setting ad_actor_system to %pM\n", mac);
> ether_addr_copy(bond->params.ad_actor_system, mac);
> bond_3ad_update_ad_actor_settings(bond);
>
> @@ -1456,8 +1457,8 @@ static int bond_option_ad_actor_system_set(struct bonding *bond,
> static int bond_option_ad_user_port_key_set(struct bonding *bond,
> const struct bond_opt_value *newval)
> {
> - netdev_info(bond->dev, "Setting ad_user_port_key to %llu\n",
> - newval->value);
> + netdev_dbg(bond->dev, "Setting ad_user_port_key to %llu\n",
> + newval->value);
>
> bond->params.ad_user_port_key = newval->value;
> return 0;
>
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