From 974be75f250378a6913c7bb268adbfd9a76a6df9 Mon Sep 17 00:00:00 2001 From: Ido Schimmel Date: Thu, 28 Jul 2022 14:45:34 +0300 Subject: netdevsim: fib: Add debugfs knob to simulate route deletion failure The previous patch ("netdevsim: fib: Fix reference count leak on route deletion failure") fixed a reference count leak that happens on route deletion failure. Such failures can only be simulated by injecting slab allocation failures, which cannot be surgically injected. In order to be able to specifically test this scenario, add a debugfs knob that allows user space to fail route deletion requests when enabled. Signed-off-by: Ido Schimmel Reviewed-by: Amit Cohen Reviewed-by: David Ahern Signed-off-by: David S. Miller --- drivers/net/netdevsim/fib.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'drivers') diff --git a/drivers/net/netdevsim/fib.c b/drivers/net/netdevsim/fib.c index 57371c697d5c..38a1fde8d886 100644 --- a/drivers/net/netdevsim/fib.c +++ b/drivers/net/netdevsim/fib.c @@ -62,6 +62,7 @@ struct nsim_fib_data { bool fail_route_offload; bool fail_res_nexthop_group_replace; bool fail_nexthop_bucket_replace; + bool fail_route_delete; }; struct nsim_fib_rt_key { @@ -915,6 +916,10 @@ static int nsim_fib4_prepare_event(struct fib_notifier_info *info, } break; case FIB_EVENT_ENTRY_DEL: + if (data->fail_route_delete) { + NL_SET_ERR_MSG_MOD(extack, "Failed to process route deletion"); + return -EINVAL; + } nsim_fib_account(&data->ipv4.fib, false); break; } @@ -953,6 +958,11 @@ static int nsim_fib6_prepare_event(struct fib_notifier_info *info, } break; case FIB_EVENT_ENTRY_DEL: + if (data->fail_route_delete) { + err = -EINVAL; + NL_SET_ERR_MSG_MOD(extack, "Failed to process route deletion"); + goto err_fib6_event_fini; + } nsim_fib_account(&data->ipv6.fib, false); break; } @@ -1526,6 +1536,10 @@ nsim_fib_debugfs_init(struct nsim_fib_data *data, struct nsim_dev *nsim_dev) debugfs_create_file("nexthop_bucket_activity", 0200, data->ddir, data, &nsim_nexthop_bucket_activity_fops); + + data->fail_route_delete = false; + debugfs_create_bool("fail_route_delete", 0600, data->ddir, + &data->fail_route_delete); return 0; } -- cgit v1.2.3