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dm snapshot: add allocated metadata to snapshot status

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Add number of sectors used by metadata to the end of the snapshot's status
line.

Renamed dm_exception_store_type's 'fraction_full' to 'usage'.  Renamed
arguments to be clearer about what is being returned.  Also added
'metadata_sectors'.

Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
This commit is contained in:
Mike Snitzer
2009-12-10 23:52:11 +00:00
committed by Alasdair G Kergon
parent 3510cb94ff
commit 985903bb3a
4 changed files with 41 additions and 24 deletions
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drivers/md/dm-snap-transient.c
+9 -6
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@@ -59,11 +59,14 @@ static void transient_commit_exception(struct dm_exception_store *store,
callback(callback_context, 1);
}
static void transient_fraction_full(struct dm_exception_store *store,
sector_t *numerator, sector_t *denominator)
static void transient_usage(struct dm_exception_store *store,
sector_t *total_sectors,
sector_t *sectors_allocated,
sector_t *metadata_sectors)
{
*numerator = ((struct transient_c *) store->context)->next_free;
*denominator = get_dev_size(store->cow->bdev);
*sectors_allocated = ((struct transient_c *) store->context)->next_free;
*total_sectors = get_dev_size(store->cow->bdev);
*metadata_sectors = 0;
}
static int transient_ctr(struct dm_exception_store *store,
@@ -106,7 +109,7 @@ static struct dm_exception_store_type _transient_type = {
.read_metadata = transient_read_metadata,
.prepare_exception = transient_prepare_exception,
.commit_exception = transient_commit_exception,
.fraction_full = transient_fraction_full,
.usage = transient_usage,
.status = transient_status,
};
@@ -118,7 +121,7 @@ static struct dm_exception_store_type _transient_compat_type = {
.read_metadata = transient_read_metadata,
.prepare_exception = transient_prepare_exception,
.commit_exception = transient_commit_exception,
.fraction_full = transient_fraction_full,
.usage = transient_usage,
.status = transient_status,
};