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| author | Mikulas Patocka <mpatocka@redhat.com> | 2009-12-11 02:52:29 +0300 |
|---|---|---|
| committer | Alasdair G Kergon <agk@redhat.com> | 2009-12-11 02:52:29 +0300 |
| commit | 4454a6216f75a9ef8c4bd0a65e34b101f725ef1e (patch) | |
| tree | 25b97b629954702692397072dd6cd20f34221b5c /Documentation/device-mapper/snapshot.txt | |
| parent | 615d1eb9cad9b34ed17c18c604254e8db533ac6f (diff) | |
| download | linux-4454a6216f75a9ef8c4bd0a65e34b101f725ef1e.tar.xz | |
dm exception store: add merge specific methods
Add functions that decide how many consecutive chunks of snapshot to
merge back into the origin next and to update the metadata afterwards.
prepare_merge provides a pointer to the most recent still-to-be-merged
chunk and returns how many previous ones are consecutive and can be
processed together.
commit_merge removes the nr_merged most-recent chunks permanently from
the exception store. The number must not exceed that returned by
prepare_merge.
Introduce NUM_SNAPSHOT_HDR_CHUNKS to show where the snapshot header
chunk is accounted for.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Reviewed-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'Documentation/device-mapper/snapshot.txt')
0 files changed, 0 insertions, 0 deletions