diff options
Diffstat (limited to 'drivers/char')
-rw-r--r-- | drivers/char/random.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/char/random.c b/drivers/char/random.c index aa7bc9a3a864..d9ca441c14bd 100644 --- a/drivers/char/random.c +++ b/drivers/char/random.c @@ -1140,6 +1140,8 @@ void add_bootloader_randomness(const void *buf, size_t size) EXPORT_SYMBOL_GPL(add_bootloader_randomness); #if IS_ENABLED(CONFIG_VMGENID) +static BLOCKING_NOTIFIER_HEAD(vmfork_chain); + /* * Handle a new unique VM ID, which is unique, not secret, so we * don't credit it, but we do immediately force a reseed after so @@ -1152,10 +1154,23 @@ void add_vmfork_randomness(const void *unique_vm_id, size_t size) crng_reseed(true); pr_notice("crng reseeded due to virtual machine fork\n"); } + blocking_notifier_call_chain(&vmfork_chain, 0, NULL); } #if IS_MODULE(CONFIG_VMGENID) EXPORT_SYMBOL_GPL(add_vmfork_randomness); #endif + +int register_random_vmfork_notifier(struct notifier_block *nb) +{ + return blocking_notifier_chain_register(&vmfork_chain, nb); +} +EXPORT_SYMBOL_GPL(register_random_vmfork_notifier); + +int unregister_random_vmfork_notifier(struct notifier_block *nb) +{ + return blocking_notifier_chain_unregister(&vmfork_chain, nb); +} +EXPORT_SYMBOL_GPL(unregister_random_vmfork_notifier); #endif struct fast_pool { |