int metadata)
{
struct dm_io_region where = {
- .bdev = ps->store->cow->bdev,
+ .bdev = dm_snap_cow(ps->store->snap)->bdev,
.sector = ps->store->chunk_size * chunk,
.count = ps->store->chunk_size,
};
{
int r;
struct disk_header *dh;
- chunk_t chunk_size;
+ unsigned chunk_size;
int chunk_size_supplied = 1;
+ char *chunk_err;
/*
- * Use default chunk size (or hardsect_size, if larger) if none supplied
+ * Use default chunk size (or logical_block_size, if larger)
+ * if none supplied
*/
if (!ps->store->chunk_size) {
ps->store->chunk_size = max(DM_CHUNK_SIZE_DEFAULT_SECTORS,
- bdev_logical_block_size(ps->store->cow->bdev) >> 9);
+ bdev_logical_block_size(dm_snap_cow(ps->store->snap)->
+ bdev) >> 9);
ps->store->chunk_mask = ps->store->chunk_size - 1;
ps->store->chunk_shift = ffs(ps->store->chunk_size) - 1;
chunk_size_supplied = 0;
ps->version = le32_to_cpu(dh->version);
chunk_size = le32_to_cpu(dh->chunk_size);
- if (!chunk_size_supplied || ps->store->chunk_size == chunk_size)
+ if (ps->store->chunk_size == chunk_size)
return 0;
- DMWARN("chunk size %llu in device metadata overrides "
- "table chunk size of %llu.",
- (unsigned long long)chunk_size,
- (unsigned long long)ps->store->chunk_size);
+ if (chunk_size_supplied)
+ DMWARN("chunk size %u in device metadata overrides "
+ "table chunk size of %u.",
+ chunk_size, ps->store->chunk_size);
/* We had a bogus chunk_size. Fix stuff up. */
free_area(ps);
- ps->store->chunk_size = chunk_size;
- ps->store->chunk_mask = chunk_size - 1;
- ps->store->chunk_shift = ffs(chunk_size) - 1;
+ r = dm_exception_store_set_chunk_size(ps->store, chunk_size,
+ &chunk_err);
+ if (r) {
+ DMERR("invalid on-disk chunk size %u: %s.",
+ chunk_size, chunk_err);
+ return r;
+ }
r = dm_io_client_resize(sectors_to_pages(ps->store->chunk_size),
ps->io_client);
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(dm_snap_cow(store->snap)->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)
ps->current_area = 0;
zero_memory_area(ps);
r = zero_disk_area(ps, 0);
- if (r) {
+ if (r)
DMWARN("zero_disk_area(0) failed");
- return r;
- }
- } else {
- /*
- * Sanity checks.
- */
- if (ps->version != SNAPSHOT_DISK_VERSION) {
- DMWARN("unable to handle snapshot disk version %d",
- ps->version);
- return -EINVAL;
- }
+ return r;
+ }
+ /*
+ * Sanity checks.
+ */
+ if (ps->version != SNAPSHOT_DISK_VERSION) {
+ DMWARN("unable to handle snapshot disk version %d",
+ ps->version);
+ return -EINVAL;
+ }
- /*
- * Metadata are valid, but snapshot is invalidated
- */
- if (!ps->valid)
- return 1;
+ /*
+ * Metadata are valid, but snapshot is invalidated
+ */
+ if (!ps->valid)
+ return 1;
- /*
- * Read the metadata.
- */
- r = read_exceptions(ps, callback, callback_context);
- if (r)
- return r;
- }
+ /*
+ * Read the metadata.
+ */
+ r = read_exceptions(ps, callback, callback_context);
- return 0;
+ return r;
}
static int persistent_prepare_exception(struct dm_exception_store *store,
- struct dm_snap_exception *e)
+ struct dm_exception *e)
{
struct pstore *ps = get_info(store);
uint32_t stride;
chunk_t next_free;
- sector_t size = get_dev_size(store->cow->bdev);
+ sector_t size = get_dev_size(dm_snap_cow(store->snap)->bdev);
/* Is there enough room ? */
if (size < ((ps->next_free + 1) * store->chunk_size))
}
static void persistent_commit_exception(struct dm_exception_store *store,
- struct dm_snap_exception *e,
+ struct dm_exception *e,
void (*callback) (void *, int success),
void *callback_context)
{
case STATUSTYPE_INFO:
break;
case STATUSTYPE_TABLE:
- DMEMIT(" %s P %llu", store->cow->name,
- (unsigned long long)store->chunk_size);
+ DMEMIT(" P %llu", (unsigned long long)store->chunk_size);
}
return sz;
.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,
};
.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,
};