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Introduces a new map to track overlayfs open event duplication in the BPF driver, keeping the overlayfs event which tends to have the richer information (e.g. create) The underlying file system event is dropped.
| // Track pid_tgid of overlayfs file_open events so we can skip the | ||
| // duplicate underlying filesystem event that follows immediately. | ||
| struct { | ||
| __uint(type, BPF_MAP_TYPE_LRU_HASH); |
| /** | ||
| * Check if the given inode belongs to an overlayfs filesystem. | ||
| * | ||
| * Overlayfs triggers LSM hooks for both the merged view and the |
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Description
Introduces a new map to track overlayfs open event duplication in the BPF driver, keeping the overlayfs event which tends to have the richer information
(e.g. create)
The underlying file system event is dropped.
Checklist
Automated testing
If any of these don't apply, please comment below.
Testing Performed
Existing overlyfs tests (correctly) failed with the duplication fix. Removing the extra (open) events resulted in the tests passing again.