[patch net-next 1/2] netdevsim: add couple of debugfs bools to debug devlink reload

[Jiri Pirko]

From: Jiri Pirko <j...@mellanox.com>

Add flag to disallow reload and another one that causes reload to
always fail.

Signed-off-by: Jiri Pirko <j...@mellanox.com>
---
 drivers/net/netdevsim/dev.c       | 20 ++++++++++++++++++++
 drivers/net/netdevsim/netdevsim.h |  2 ++
 2 files changed, 22 insertions(+)

diff --git a/drivers/net/netdevsim/dev.c b/drivers/net/netdevsim/dev.c
index fbc4cdcfe551..31d1752c703a 100644
--- a/drivers/net/netdevsim/dev.c
+++ b/drivers/net/netdevsim/dev.c
@@ -90,6 +90,10 @@ static int nsim_dev_debugfs_init(struct nsim_dev *nsim_dev)
                            &nsim_dev->test1);
        debugfs_create_file("take_snapshot", 0200, nsim_dev->ddir, nsim_dev,
                            &nsim_dev_take_snapshot_fops);
+       debugfs_create_bool("dont_allow_reload", 0600, nsim_dev->ddir,
+                           &nsim_dev->dont_allow_reload);
+       debugfs_create_bool("fail_reload", 0600, nsim_dev->ddir,
+                           &nsim_dev->fail_reload);
        return 0;
 }
 
@@ -478,6 +482,14 @@ static int nsim_dev_reload_down(struct devlink *devlink, 
bool netns_change,
 {
        struct nsim_dev *nsim_dev = devlink_priv(devlink);
 
+       if (nsim_dev->dont_allow_reload) {
+               /* For testing purposes, user set debugfs dont_allow_reload
+                * value to true. So forbid it.
+                */
+               NL_SET_ERR_MSG_MOD(extack, "User forbidded reload for testing 
purposes");
+               return -EOPNOTSUPP;
+       }
+
        nsim_dev_reload_destroy(nsim_dev);
        return 0;
 }
@@ -487,6 +499,14 @@ static int nsim_dev_reload_up(struct devlink *devlink,
 {
        struct nsim_dev *nsim_dev = devlink_priv(devlink);
 
+       if (nsim_dev->fail_reload) {
+               /* For testing purposes, user set debugfs fail_reload
+                * value to true. Fail right away.
+                */
+               NL_SET_ERR_MSG_MOD(extack, "User setup the reload to fail for 
testing purposes");
+               return -EINVAL;
+       }
+
        return nsim_dev_reload_create(nsim_dev, extack);
 }
 
diff --git a/drivers/net/netdevsim/netdevsim.h 
b/drivers/net/netdevsim/netdevsim.h
index 8168a5475fe7..24358385d869 100644
--- a/drivers/net/netdevsim/netdevsim.h
+++ b/drivers/net/netdevsim/netdevsim.h
@@ -161,6 +161,8 @@ struct nsim_dev {
        bool fw_update_status;
        u32 max_macs;
        bool test1;
+       bool dont_allow_reload;
+       bool fail_reload;
        struct devlink_region *dummy_region;
 };
 
-- 
2.21.0