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dm snapshot: persistent use define for disk header chunk size 

This patch fixes hard-coded value for the size of a chunk that includes
disk header for persistent snapshot. It should be changed to existing
macro NUM_SNAPSHOT_HDR_CHUNKS instead of using hard-coded value 1.

Signed-off-by: Tomohiro Kusumi <kusumi.tomohiro@jp.fujitsu.com>
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
This commit is contained in:
Tomohiro Kusumi 2010-08-12 04:13:59 +01:00 committed by Alasdair G Kergon
parent a9c88f2ebc
commit 87c961cb74
1 changed files with 3 additions and 3 deletions
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6
drivers/md/dm-snap-persistent.c
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@ -266,7 +266,7 @@ static int chunk_io(struct pstore *ps, void *area, chunk_t chunk, int rw,
*/ */
static chunk_t area_location(struct pstore *ps, chunk_t area) static chunk_t area_location(struct pstore *ps, chunk_t area)
{ {
return 1 + ((ps->exceptions_per_area + 1) * area); return NUM_SNAPSHOT_HDR_CHUNKS + ((ps->exceptions_per_area + 1) * area);
} }
/* /*
@ -780,8 +780,8 @@ static int persistent_commit_merge(struct dm_exception_store *store,
* ps->current_area does not get reduced by prepare_merge() until * ps->current_area does not get reduced by prepare_merge() until
* after commit_merge() has removed the nr_merged previous exceptions. * after commit_merge() has removed the nr_merged previous exceptions.
*/ */
ps->next_free = (area_location(ps, ps->current_area) - 1) + ps->next_free = area_location(ps, ps->current_area) +
(ps->current_committed + 1) + NUM_SNAPSHOT_HDR_CHUNKS; ps->current_committed + 1;
return 0; return 0;
} }