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→Overmounted files
=== Overmounted files ===
=== Overmounted files ===
If a task opens a file and then a new mountpoint appears on any part of its path, the original file's path may become non existing or point to different file. In Linux there's no way to open a file by a name looking ''under'' certain mount points, but there's the openat() call which may look up a file starting from arbitrary point which, in turn, can be over-mounted too.
If a task opens a file and then a new mountpoint appears on any part of its path, the original file's path may become non existing or point to different file.
CRIU doesn't work with such files yet aborting the dump. However, there's a way to fix this.
Although in Linux there's no way to open a file by a name looking ''under'' certain mount points, there's the openat() call which may look up a file starting from arbitrary point which, in turn, can be over-mounted too.
== What CRIU does about it ==
== What CRIU does about it ==