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Subject[PATCH net-next v2 6/6] bonding: make Kconfig toggle to disable legacy interfaces
Date
By default, enable retaining all user-facing API that includes the use of
master and slave, but add a Kconfig knob that allows those that wish to
remove it entirely do so in one shot.

Cc: Jay Vosburgh <j.vosburgh@gmail.com>
Cc: Veaceslav Falico <vfalico@gmail.com>
Cc: Andy Gospodarek <andy@greyhouse.net>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Thomas Davis <tadavis@lbl.gov>
Cc: netdev@vger.kernel.org
Signed-off-by: Jarod Wilson <jarod@redhat.com>
---
drivers/net/Kconfig | 12 ++++++++++++
drivers/net/bonding/bond_main.c | 4 ++--
drivers/net/bonding/bond_options.c | 4 ++--
drivers/net/bonding/bond_procfs.c | 8 ++++++++
drivers/net/bonding/bond_sysfs.c | 14 ++++++++++----
drivers/net/bonding/bond_sysfs_port.c | 6 ++++--
6 files changed, 38 insertions(+), 10 deletions(-)

diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index c3dbe64e628e..1a13894820cb 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -56,6 +56,18 @@ config BONDING
To compile this driver as a module, choose M here: the module
will be called bonding.

+config BONDING_LEGACY_INTERFACES
+ default y
+ bool "Maintain legacy bonding interface names"
+ help
+ The bonding driver historically made use of the terms "master" and
+ "slave" to describe it's component members. This has since been
+ changed to "bond" and "port" as part of a broader effort to remove
+ the use of socially problematic language from the kernel. However,
+ removing all such cases requires breaking long-standing user-facing
+ interfaces in /proc and /sys, which will not be done, unless you
+ opt out of them here, by selecting 'N'.
+
config DUMMY
tristate "Dummy net driver support"
help
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index b8a351d85da4..226d5fb76221 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -194,7 +194,7 @@ module_param(lp_interval, uint, 0);
MODULE_PARM_DESC(lp_interval, "The number of seconds between instances where "
"the bonding driver sends learning packets to "
"each port's peer switch. The default is 1.");
-/* legacy compatability module parameters */
+#ifdef CONFIG_BONDING_LEGACY_INTERFACES
module_param_named(all_slaves_active, apa, int, 0644);
MODULE_PARM_DESC(all_slaves_active, "Keep all frames received on an interface "
"by setting active flag for all slaves; "
@@ -205,7 +205,7 @@ MODULE_PARM_DESC(packets_per_slave, "Packets to send per slave in balance-rr "
"mode; 0 for a random slave, 1 packet per "
"slave (default), >1 packets per slave. "
"(Legacy compat synonym for packets_per_port).");
-/* end legacy compatability module parameters */
+#endif

/*----------------------------- Global variables ----------------------------*/

diff --git a/drivers/net/bonding/bond_options.c b/drivers/net/bonding/bond_options.c
index 8e4050c2b08e..630079ba5452 100644
--- a/drivers/net/bonding/bond_options.c
+++ b/drivers/net/bonding/bond_options.c
@@ -434,7 +434,7 @@ static const struct bond_option bond_opts[BOND_OPT_LAST] = {
.values = bond_intmax_tbl,
.set = bond_option_peer_notif_delay_set
},
-/* legacy sysfs interfaces */
+#ifdef CONFIG_BONDING_LEGACY_INTERFACES
[BOND_OPT_PACKETS_PER_SLAVE] = {
.id = BOND_OPT_PACKETS_PER_SLAVE,
.name = "packets_per_slave",
@@ -467,7 +467,7 @@ static const struct bond_option bond_opts[BOND_OPT_LAST] = {
.flags = BOND_OPTFLAG_RAWVAL,
.set = bond_option_ports_set
},
-/* end legacy sysfs interfaces */
+#endif
};

/* Searches for an option by name */
diff --git a/drivers/net/bonding/bond_procfs.c b/drivers/net/bonding/bond_procfs.c
index 2e65472e3c58..8e4a03d86329 100644
--- a/drivers/net/bonding/bond_procfs.c
+++ b/drivers/net/bonding/bond_procfs.c
@@ -86,8 +86,10 @@ static void bond_info_show_bond_dev(struct seq_file *seq)
primary = rcu_dereference(bond->primary_port);
seq_printf(seq, "Primary Port: %s",
primary ? primary->dev->name : "None");
+#ifdef CONFIG_BONDING_LEGACY_INTERFACES
seq_printf(seq, "Primary Slave: %s",
primary ? primary->dev->name : "None");
+#endif
if (primary) {
optval = bond_opt_get_val(BOND_OPT_PRIMARY_RESELECT,
bond->params.primary_reselect);
@@ -97,8 +99,10 @@ static void bond_info_show_bond_dev(struct seq_file *seq)

seq_printf(seq, "\nCurrently Active Port: %s\n",
(curr) ? curr->dev->name : "None");
+#ifdef CONFIG_BONDING_LEGACY_INTERFACES
seq_printf(seq, "Currently Active Slave: %s\n",
(curr) ? curr->dev->name : "None");
+#endif
}

seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ?
@@ -176,7 +180,9 @@ static void bond_info_show_port(struct seq_file *seq,
struct bonding *bond = PDE_DATA(file_inode(seq->file));

seq_printf(seq, "\nPort Interface: %s\n", port->dev->name);
+#ifdef CONFIG_BONDING_LEGACY_INTERFACES
seq_printf(seq, "Slave Interface: %s\n", port->dev->name);
+#endif
seq_printf(seq, "MII Status: %s\n", bond_port_link_status(port->link));
if (port->speed == SPEED_UNKNOWN)
seq_printf(seq, "Speed: %s\n", "Unknown");
@@ -194,7 +200,9 @@ static void bond_info_show_port(struct seq_file *seq,
seq_printf(seq, "Permanent HW addr: %*phC\n",
port->dev->addr_len, port->perm_hwaddr);
seq_printf(seq, "Port queue ID: %d\n", port->queue_id);
+#ifdef CONFIG_BONDING_LEGACY_INTERFACES
seq_printf(seq, "Slave queue ID: %d\n", port->queue_id);
+#endif

if (BOND_MODE(bond) == BOND_MODE_8023AD) {
const struct ad_port *ad_port = &PORT_AD_INFO(port)->ad_port;
diff --git a/drivers/net/bonding/bond_sysfs.c b/drivers/net/bonding/bond_sysfs.c
index 1c2f44a76f31..1911027ea2e1 100644
--- a/drivers/net/bonding/bond_sysfs.c
+++ b/drivers/net/bonding/bond_sysfs.c
@@ -150,6 +150,7 @@ static const struct class_attribute class_attr_bonding_devs = {
.store = bonding_store_bonds,
};

+#ifdef CONFIG_BONDING_LEGACY_INTERFACES
/* "show" function for the bond_masters attribute.
* The class parameter is ignored.
*/
@@ -187,6 +188,7 @@ static const struct class_attribute class_attr_bonding_masters = {
.show = bonding_show_bonds_legacy,
.store = bonding_store_bonds_legacy,
};
+#endif

/* Generic "store" method for bonding sysfs option setting */
static ssize_t bonding_sysfs_store_option(struct device *d,
@@ -771,7 +773,7 @@ static ssize_t bonding_show_ad_user_port_key(struct device *d,
static DEVICE_ATTR(ad_user_port_key, 0644,
bonding_show_ad_user_port_key, bonding_sysfs_store_option);

-/* legacy sysfs interfaces */
+#ifdef CONFIG_BONDING_LEGACY_INTERFACES
static DEVICE_ATTR(slaves, 0644, bonding_show_ports,
bonding_sysfs_store_option);
static DEVICE_ATTR(active_slave, 0644,
@@ -780,7 +782,7 @@ static DEVICE_ATTR(all_slaves_active, 0644,
bonding_show_ports_active, bonding_sysfs_store_option);
static DEVICE_ATTR(packets_per_slave, 0644,
bonding_show_packets_per_port, bonding_sysfs_store_option);
-/* end legacy sysfs interfaces */
+#endif

static struct attribute *per_bond_attrs[] = {
&dev_attr_ports.attr,
@@ -819,12 +821,12 @@ static struct attribute *per_bond_attrs[] = {
&dev_attr_ad_actor_sys_prio.attr,
&dev_attr_ad_actor_system.attr,
&dev_attr_ad_user_port_key.attr,
-/* legacy sysfs interfaces */
+#ifdef CONFIG_BONDING_LEGACY_INTERFACES
&dev_attr_slaves.attr,
&dev_attr_active_slave.attr,
&dev_attr_all_slaves_active.attr,
&dev_attr_packets_per_slave.attr,
-/* end legacy sysfs interfaces */
+#endif
NULL,
};

@@ -871,6 +873,7 @@ int bond_create_sysfs(struct bond_net *bn)
return ret;
}

+#ifdef CONFIG_BONDING_LEGACY_INTERFACES
bn->class_attr_bonding_masters = class_attr_bonding_masters;
sysfs_attr_init(&bn->class_attr_bonding_masters.attr);

@@ -884,6 +887,7 @@ int bond_create_sysfs(struct bond_net *bn)
class_attr_bonding_masters.attr.name);
ret = 0;
}
+#endif

return ret;

@@ -893,7 +897,9 @@ int bond_create_sysfs(struct bond_net *bn)
void bond_destroy_sysfs(struct bond_net *bn)
{
netdev_class_remove_file_ns(&bn->class_attr_bonding_devs, bn->net);
+#ifdef CONFIG_BONDING_LEGACY_INTERFACES
netdev_class_remove_file_ns(&bn->class_attr_bonding_masters, bn->net);
+#endif
}

/* Initialize sysfs for each bond. This sets up and registers
diff --git a/drivers/net/bonding/bond_sysfs_port.c b/drivers/net/bonding/bond_sysfs_port.c
index 0d427b407fcb..81fbe3deeb3e 100644
--- a/drivers/net/bonding/bond_sysfs_port.c
+++ b/drivers/net/bonding/bond_sysfs_port.c
@@ -152,11 +152,12 @@ int bond_sysfs_port_add(struct bond_port *port)
if (err)
goto err_kobject_put;

- /* legacy sysfs interface */
+#ifdef CONFIG_BONDING_LEGACY_INTERFACES
err = sysfs_create_link(&(port->dev->dev.kobj), &port->kobj,
"bonding_slave");
if (err)
goto err_kobject_put;
+#endif

for (a = port_attrs; *a; ++a) {
err = sysfs_create_file(&port->kobj, &((*a)->attr));
@@ -178,8 +179,9 @@ void bond_sysfs_port_del(struct bond_port *port)
for (a = port_attrs; *a; ++a)
sysfs_remove_file(&port->kobj, &((*a)->attr));

- /* legacy sysfs interface */
+#ifdef CONFIG_BONDING_LEGACY_INTERFACES
sysfs_remove_link(&(port->dev->dev.kobj), "bonding_slave");
+#endif

kobject_put(&port->kobj);
}
--
2.27.0
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