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plugin: enable multiple plugins for the same hook

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CRIU provides two plugins for checkpoint/restore of GPU applications:
amdgpu and cuda. Both plugins use the `RESUME_DEVICES_LATE` hook to
enable restore:

    CR_PLUGIN_REGISTER_HOOK(CR_PLUGIN_HOOK__RESUME_DEVICES_LATE, amdgpu_plugin_resume_devices_late)
    CR_PLUGIN_REGISTER_HOOK(CR_PLUGIN_HOOK__RESUME_DEVICES_LATE, cuda_plugin_resume_devices_late)

However, CRIU currently does not support running more than one plugin
for the same hook. As a result, when both plugins are installed, the
resume function for CUDA applications is not executed. To fix this,
we need to make sure that both `plugin_resume_devices_late()` functions
return `-ENOTSUP` when restore is not supported.

Signed-off-by: Radostin Stoyanov <rstoyanov@fedoraproject.org>
This commit is contained in:
Radostin Stoyanov
2024-07-24 11:30:59 +01:00
committed by Andrei Vagin
parent 85050be66b
commit c42b58f4fb
2 changed files with 3 additions and 2 deletions
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2
plugins/cuda/cuda_plugin.c
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@@ -408,7 +408,7 @@ interrupt:
int cuda_plugin_resume_devices_late(int pid)
{
if (plugin_disabled) {
return 0;
return -ENOTSUP;
}
return resume_device(pid, 1);