dm exception store: split set_chunk_size
Break the function set_chunk_size to two functions in preparation for the fix in the following patch. Cc: stable@kernel.org Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
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@ -171,6 +171,14 @@ static int set_chunk_size(struct dm_exception_store *store,
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*/
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chunk_size_ulong = round_up(chunk_size_ulong, PAGE_SIZE >> 9);
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return dm_exception_store_set_chunk_size(store, chunk_size_ulong,
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error);
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}
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int dm_exception_store_set_chunk_size(struct dm_exception_store *store,
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unsigned long chunk_size_ulong,
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char **error)
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{
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/* Check chunk_size is a power of 2 */
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if (!is_power_of_2(chunk_size_ulong)) {
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*error = "Chunk size is not a power of 2";
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@ -168,6 +168,10 @@ static inline chunk_t sector_to_chunk(struct dm_exception_store *store,
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int dm_exception_store_type_register(struct dm_exception_store_type *type);
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int dm_exception_store_type_unregister(struct dm_exception_store_type *type);
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int dm_exception_store_set_chunk_size(struct dm_exception_store *store,
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unsigned long chunk_size_ulong,
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char **error);
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int dm_exception_store_create(struct dm_target *ti, int argc, char **argv,
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unsigned *args_used,
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struct dm_exception_store **store);
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