dm ioctl: allow dm_copy_name_and_uuid to return only one field

[safe/jmp/linux-2.6] / drivers / md / dm-ioctl.c

diff --git a/drivers/md/dm-ioctl.c b/drivers/md/dm-ioctl.c
index c3de311..8da7a01 100644 (file)
--- a/drivers/md/dm-ioctl.c
+++ b/drivers/md/dm-ioctl.c
@@ -548,7 +548,7 @@ static int __dev_status(struct mapped_device *md, struct dm_ioctl *param)
         */
        param->open_count = dm_open_count(md);
 
-       if (disk->policy)
+       if (get_disk_ro(disk))
                param->flags |= DM_READONLY_FLAG;
 
        param->event_nr = dm_get_event_nr(md);
@@ -988,9 +988,9 @@ static int dev_wait(struct dm_ioctl *param, size_t param_size)
        return r;
 }
 
-static inline int get_mode(struct dm_ioctl *param)
+static inline fmode_t get_mode(struct dm_ioctl *param)
 {
-       int mode = FMODE_READ | FMODE_WRITE;
+       fmode_t mode = FMODE_READ | FMODE_WRITE;
 
        if (param->flags & DM_READONLY_FLAG)
                mode = FMODE_READ;
@@ -1131,7 +1131,7 @@ static void retrieve_deps(struct dm_table *table,
        unsigned int count = 0;
        struct list_head *tmp;
        size_t len, needed;
-       struct dm_dev *dd;
+       struct dm_dev_internal *dd;
        struct dm_target_deps *deps;
 
        deps = get_result_buffer(param, param_size, &len);
@@ -1157,7 +1157,7 @@ static void retrieve_deps(struct dm_table *table,
        deps->count = count;
        count = 0;
        list_for_each_entry (dd, dm_table_get_devices(table), list)
-               deps->dev[count++] = huge_encode_dev(dd->bdev->bd_dev);
+               deps->dev[count++] = huge_encode_dev(dd->dm_dev.bdev->bd_dev);
 
        param->data_size = param->data_start + needed;
 }
@@ -1550,8 +1550,10 @@ int dm_copy_name_and_uuid(struct mapped_device *md, char *name, char *uuid)
                goto out;
        }
 
-       strcpy(name, hc->name);
-       strcpy(uuid, hc->uuid ? : "");
+       if (name)
+               strcpy(name, hc->name);
+       if (uuid)
+               strcpy(uuid, hc->uuid ? : "");
 
 out:
        up_read(&_hash_lock);