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Now that bmap items support the realtime device, we can add the
necessary pieces to the atomic extent swapping code to support such
things.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Add a new swapext flag that enables us to perform post-swap processing
on file2 once we're done swapping the extent maps. If we were swapping
the extended attributes, we want to be able to convert file2's attr fork
from block to inline format.
This isn't used anywhere right now, but we need to have the basic ondisk
flags in place so that a future online xattr repair feature can create
salvaged attrs in a temporary file and swap the attr forks when ready.
If one file is in extents format and the other is inline, we will have to
promote both to extents format to perform the swap. After the swap, we
can try to condense the fixed file's attr fork back down to inline
format if possible.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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Now that we've created the skeleton of a log intent item to track and
restart extent swap operations, add the upper level logic to commit
intent items and turn them into concrete work recorded in the log. We
use the deferred item "multihop" feature that was introduced a few
patches ago to constrain the number of active swap operations to one per
thread.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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