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netdevsim: extend device attrs to support port addition and deletion

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In order to test flows in core, it is beneficial to maintain previously
supported possibility to add and delete ports during netdevsim lifetime.
Do it by extending device sysfs attrs by "new_port" and "del_port".

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Pirko 2019-04-25 15:59:54 +02:00 • committed by David S. Miller
parent 8320d14591
commit 794b2c05ca
3 changed files with 92 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

55
drivers/net/netdevsim/dev.c
View file

@ -18,6 +18,7 @@
#include <linux/debugfs.h>
#include <linux/device.h>
#include <linux/list.h>
#include <linux/mutex.h>
#include <linux/random.h>
#include <linux/rtnetlink.h>
#include <net/devlink.h>
@ -238,6 +239,7 @@ nsim_dev_create(struct nsim_bus_dev *nsim_bus_dev, unsigned int port_count)
nsim_dev->switch_id.id_len = sizeof(nsim_dev->switch_id.id);
get_random_bytes(nsim_dev->switch_id.id, nsim_dev->switch_id.id_len);
INIT_LIST_HEAD(&nsim_dev->port_list);
mutex_init(&nsim_dev->port_list_lock);
nsim_dev->fib_data = nsim_fib_create();
if (IS_ERR(nsim_dev->fib_data)) {
@ -285,10 +287,12 @@ void nsim_dev_destroy(struct nsim_dev *nsim_dev)
devlink_unregister(devlink);
devlink_resources_unregister(devlink, NULL);
nsim_fib_destroy(nsim_dev->fib_data);
mutex_destroy(&nsim_dev->port_list_lock);
devlink_free(devlink);
}
static int nsim_dev_port_add(struct nsim_dev *nsim_dev, unsigned int port_index)
static int __nsim_dev_port_add(struct nsim_dev *nsim_dev,
unsigned int port_index)
{
struct nsim_dev_port *nsim_dev_port;
struct devlink_port *devlink_port;
@ -324,7 +328,7 @@ err_port_free:
return err;
}
static void nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port)
static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port)
{
struct devlink_port *devlink_port = &nsim_dev_port->devlink_port;
@ -340,7 +344,7 @@ static void nsim_dev_port_del_all(struct nsim_dev *nsim_dev)
list_for_each_entry_safe(nsim_dev_port, tmp,
&nsim_dev->port_list, list)
nsim_dev_port_del(nsim_dev_port);
__nsim_dev_port_del(nsim_dev_port);
}
int nsim_dev_probe(struct nsim_bus_dev *nsim_bus_dev)
@ -355,7 +359,7 @@ int nsim_dev_probe(struct nsim_bus_dev *nsim_bus_dev)
dev_set_drvdata(&nsim_bus_dev->dev, nsim_dev);
for (i = 0; i < nsim_bus_dev->port_count; i++) {
err = nsim_dev_port_add(nsim_dev, i);
err = __nsim_dev_port_add(nsim_dev, i);
if (err)
goto err_port_del_all;
}
@ -375,6 +379,49 @@ void nsim_dev_remove(struct nsim_bus_dev *nsim_bus_dev)
nsim_dev_destroy(nsim_dev);
}
static struct nsim_dev_port *
__nsim_dev_port_lookup(struct nsim_dev *nsim_dev, unsigned int port_index)
{
struct nsim_dev_port *nsim_dev_port;
list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list)
if (nsim_dev_port->port_index == port_index)
return nsim_dev_port;
return NULL;
}
int nsim_dev_port_add(struct nsim_bus_dev *nsim_bus_dev,
unsigned int port_index)
{
struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
int err;
mutex_lock(&nsim_dev->port_list_lock);
if (__nsim_dev_port_lookup(nsim_dev, port_index))
err = -EEXIST;
else
err = __nsim_dev_port_add(nsim_dev, port_index);
mutex_unlock(&nsim_dev->port_list_lock);
return err;
}
int nsim_dev_port_del(struct nsim_bus_dev *nsim_bus_dev,
unsigned int port_index)
{
struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
struct nsim_dev_port *nsim_dev_port;
int err = 0;
mutex_lock(&nsim_dev->port_list_lock);
nsim_dev_port = __nsim_dev_port_lookup(nsim_dev, port_index);
if (!nsim_dev_port)
err = -ENOENT;
else
__nsim_dev_port_del(nsim_dev_port);
mutex_unlock(&nsim_dev->port_list_lock);
return err;
}
int nsim_dev_init(void)
{
nsim_dev_ddir = debugfs_create_dir(DRV_NAME, NULL);