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 90e19f1..8da7a01 100644 (file)
--- a/drivers/md/dm-ioctl.c
+++ b/drivers/md/dm-ioctl.c
@@ -426,7 +426,7 @@ static int list_devices(struct dm_ioctl *param, size_t param_size)
                                old_nl->next = (uint32_t) ((void *) nl -
                                                           (void *) old_nl);
                        disk = dm_disk(hc->md);
-                       nl->dev = huge_encode_dev(MKDEV(disk->major, disk->first_minor));
+                       nl->dev = huge_encode_dev(disk_devt(disk));
                        nl->next = 0;
                        strcpy(nl->name, hc->name);
 
@@ -539,7 +539,7 @@ static int __dev_status(struct mapped_device *md, struct dm_ioctl *param)
        if (dm_suspended(md))
                param->flags |= DM_SUSPEND_FLAG;
 
-       param->dev = huge_encode_dev(MKDEV(disk->major, disk->first_minor));
+       param->dev = huge_encode_dev(disk_devt(disk));
 
        /*
         * Yes, this will be out of date by the time it gets back
@@ -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;
@@ -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);