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| author | Mike Snitzer <snitzer@redhat.com> | 2009-12-11 00:52:11 +0100 |
|---|---|---|
| committer | Alasdair G Kergon <agk@redhat.com> | 2009-12-11 00:52:11 +0100 |
| commit | 985903bb3a6d98623360ab6c855417f638840029 (patch) | |
| tree | 64e7582e0b7827aa318c4fe1c497ebc541d9ce8b /drivers/md/dm-snap-persistent.c | |
| parent | dm snapshot: rename exception functions (diff) | |
| download | linux-985903bb3a6d98623360ab6c855417f638840029.tar.xz linux-985903bb3a6d98623360ab6c855417f638840029.zip | |
dm snapshot: add allocated metadata to snapshot status
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>
Diffstat (limited to 'drivers/md/dm-snap-persistent.c')
| -rw-r--r-- | drivers/md/dm-snap-persistent.c | 23 |
1 files changed, 17 insertions, 6 deletions
diff --git a/drivers/md/dm-snap-persistent.c b/drivers/md/dm-snap-persistent.c index 24b8acd1be83..767065f6c5f3 100644 --- a/drivers/md/dm-snap-persistent.c +++ b/drivers/md/dm-snap-persistent.c @@ -489,11 +489,22 @@ static struct pstore *get_info(struct dm_exception_store *store) return (struct pstore *) store->context; } -static void persistent_fraction_full(struct dm_exception_store *store, - sector_t *numerator, sector_t *denominator) +static void persistent_usage(struct dm_exception_store *store, + sector_t *total_sectors, + sector_t *sectors_allocated, + sector_t *metadata_sectors) { - *numerator = get_info(store)->next_free * store->chunk_size; - *denominator = get_dev_size(store->cow->bdev); + struct pstore *ps = get_info(store); + + *sectors_allocated = ps->next_free * store->chunk_size; + *total_sectors = get_dev_size(store->cow->bdev); + + /* + * First chunk is the fixed header. + * Then there are (ps->current_area + 1) metadata chunks, each one + * separated from the next by ps->exceptions_per_area data chunks. + */ + *metadata_sectors = (ps->current_area + 2) * store->chunk_size; } static void persistent_dtr(struct dm_exception_store *store) @@ -738,7 +749,7 @@ static struct dm_exception_store_type _persistent_type = { .prepare_exception = persistent_prepare_exception, .commit_exception = persistent_commit_exception, .drop_snapshot = persistent_drop_snapshot, - .fraction_full = persistent_fraction_full, + .usage = persistent_usage, .status = persistent_status, }; @@ -751,7 +762,7 @@ static struct dm_exception_store_type _persistent_compat_type = { .prepare_exception = persistent_prepare_exception, .commit_exception = persistent_commit_exception, .drop_snapshot = persistent_drop_snapshot, - .fraction_full = persistent_fraction_full, + .usage = persistent_usage, .status = persistent_status, }; |