diff options
Diffstat (limited to 'drivers/md/dm-table.c')
| -rw-r--r-- | drivers/md/dm-table.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c index 10c9439635c..827b648fac5 100644 --- a/drivers/md/dm-table.c +++ b/drivers/md/dm-table.c @@ -237,6 +237,44 @@ int dm_table_create(struct dm_table **result, int mode, return 0; } +int dm_create_error_table(struct dm_table **result, struct mapped_device *md) +{ + struct dm_table *t; + sector_t dev_size = 1; + int r; + + /* + * Find current size of device. + * Default to 1 sector if inactive. + */ + t = dm_get_table(md); + if (t) { + dev_size = dm_table_get_size(t); + dm_table_put(t); + } + + r = dm_table_create(&t, FMODE_READ, 1, md); + if (r) + return r; + + r = dm_table_add_target(t, "error", 0, dev_size, NULL); + if (r) + goto out; + + r = dm_table_complete(t); + if (r) + goto out; + + *result = t; + +out: + if (r) + dm_table_put(t); + + return r; +} +EXPORT_SYMBOL_GPL(dm_create_error_table); + static void free_devices(struct list_head *devices) { struct list_head *tmp, *next; |