Arkadiusz Bubała
c0daec32f8
Long hold the dataset during upgrade
...
If the receive or rollback is performed while filesystem is upgrading
the objset may be evicted in `dsl_dataset_clone_swap_sync_impl`. This
will lead to NULL pointer dereference when upgrade tries to access
evicted objset.
This commit adds long hold of dataset during whole upgrade process.
The receive and rollback will return an EBUSY error until the
upgrade is not finished.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov >
Signed-off-by: Arkadiusz Bubała <arkadiusz.bubala@open-e.com >
Closes #5295
Closes #6837
2017-11-10 13:37:10 -08:00
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