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Add a superblock flag to temporarily disable ratelimiting for a recovery
pass.
This will be used to make check_key_has_snapshot safer: we don't want to
delete a key for a missing snapshot unless we know that the snapshots
and subvolumes btrees are consistent, i.e. check_snapshots and
check_subvols have run recently.
Changing those btrees - creating/deleting a subvolume or snapshot - will
set the "disable ratelimit" flag, i.e. ensuring that those passes run if
check_key_has_snapshot discovers an error.
We're only disabling ratelimiting in the snapshot/subvol delete paths,
we're not so concerned about the create paths.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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New superblock section for statistics on recovery passes - last time
ran (successfully), last runtime.
This will be used by self healing code to determine when to kick off
potentially expensive recovery passes.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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