# define rbd_assert(expr) ((void) 0)
#endif /* !RBD_DEBUG */
-static void rbd_img_parent_read(struct rbd_obj_request *obj_request);
static int rbd_img_obj_request_submit(struct rbd_obj_request *obj_request);
+static void rbd_img_parent_read(struct rbd_obj_request *obj_request);
+static void rbd_dev_remove_parent(struct rbd_device *rbd_dev);
static int rbd_dev_refresh(struct rbd_device *rbd_dev, u64 *hver);
static int rbd_dev_v2_refresh(struct rbd_device *rbd_dev, u64 *hver);
return NULL;
}
-static int rbd_dev_set_mapping(struct rbd_device *rbd_dev)
+static int rbd_dev_mapping_set(struct rbd_device *rbd_dev)
{
if (!memcmp(rbd_dev->spec->snap_name, RBD_SNAP_HEAD_NAME,
sizeof (RBD_SNAP_HEAD_NAME))) {
rbd_dev->mapping.features = snap->features;
rbd_dev->mapping.read_only = true;
}
- set_bit(RBD_DEV_FLAG_EXISTS, &rbd_dev->flags);
return 0;
}
+static void rbd_dev_mapping_clear(struct rbd_device *rbd_dev)
+{
+ rbd_dev->mapping.size = 0;
+ rbd_dev->mapping.features = 0;
+ rbd_dev->mapping.read_only = true;
+}
+
static void rbd_header_free(struct rbd_image_header *header)
{
kfree(header->object_prefix);
static void rbd_update_mapping_size(struct rbd_device *rbd_dev)
{
- sector_t size;
-
if (rbd_dev->spec->snap_id != CEPH_NOSNAP)
return;
- size = (sector_t) rbd_dev->header.image_size / SECTOR_SIZE;
- dout("setting size to %llu sectors", (unsigned long long) size);
- rbd_dev->mapping.size = (u64) size;
- set_capacity(rbd_dev->disk, size);
+ if (rbd_dev->mapping.size != rbd_dev->header.image_size) {
+ sector_t size;
+
+ rbd_dev->mapping.size = rbd_dev->header.image_size;
+ size = (sector_t)rbd_dev->mapping.size / SECTOR_SIZE;
+ dout("setting size to %llu sectors", (unsigned long long)size);
+ set_capacity(rbd_dev->disk, size);
+ }
}
/*
rbd_dev->disk = disk;
- set_capacity(rbd_dev->disk, rbd_dev->mapping.size / SECTOR_SIZE);
-
return 0;
out_disk:
put_disk(disk);
struct device_attribute *attr, char *buf)
{
struct rbd_device *rbd_dev = dev_to_rbd_dev(dev);
- sector_t size;
-
- down_read(&rbd_dev->header_rwsem);
- size = get_capacity(rbd_dev->disk);
- up_read(&rbd_dev->header_rwsem);
- return sprintf(buf, "%llu\n", (unsigned long long) size * SECTOR_SIZE);
+ return sprintf(buf, "%llu\n",
+ (unsigned long long)rbd_dev->mapping.size);
}
/*
struct rbd_device *rbd_dev = dev_to_rbd_dev(dev);
return sprintf(buf, "0x%016llx\n",
- (unsigned long long) rbd_dev->mapping.features);
+ (unsigned long long)rbd_dev->mapping.features);
}
static ssize_t rbd_major_show(struct device *dev,
{
struct rbd_device *rbd_dev = dev_to_rbd_dev(dev);
- return sprintf(buf, "%d\n", rbd_dev->major);
+ if (rbd_dev->major)
+ return sprintf(buf, "%d\n", rbd_dev->major);
+
+ return sprintf(buf, "(none)\n");
+
}
static ssize_t rbd_client_id_show(struct device *dev,
struct rbd_device *rbd_dev = dev_to_rbd_dev(dev);
return sprintf(buf, "%llu\n",
- (unsigned long long) rbd_dev->spec->pool_id);
+ (unsigned long long) rbd_dev->spec->pool_id);
}
static ssize_t rbd_name_show(struct device *dev,
return ret;
}
-static int rbd_dev_probe_finish(struct rbd_device *rbd_dev)
+static int rbd_dev_probe_parent(struct rbd_device *rbd_dev)
{
struct rbd_device *parent = NULL;
- struct rbd_spec *parent_spec = NULL;
- struct rbd_client *rbdc = NULL;
+ struct rbd_spec *parent_spec;
+ struct rbd_client *rbdc;
+ int ret;
+
+ if (!rbd_dev->parent_spec)
+ return 0;
+ /*
+ * We need to pass a reference to the client and the parent
+ * spec when creating the parent rbd_dev. Images related by
+ * parent/child relationships always share both.
+ */
+ parent_spec = rbd_spec_get(rbd_dev->parent_spec);
+ rbdc = __rbd_get_client(rbd_dev->rbd_client);
+
+ ret = -ENOMEM;
+ parent = rbd_dev_create(rbdc, parent_spec);
+ if (!parent)
+ goto out_err;
+
+ ret = rbd_dev_image_probe(parent);
+ if (ret < 0)
+ goto out_err;
+ rbd_dev->parent = parent;
+
+ return 0;
+out_err:
+ if (parent) {
+ rbd_spec_put(rbd_dev->parent_spec);
+ kfree(rbd_dev->header_name);
+ rbd_dev_destroy(parent);
+ } else {
+ rbd_put_client(rbdc);
+ rbd_spec_put(parent_spec);
+ }
+
+ return ret;
+}
+
+static int rbd_dev_probe_finish(struct rbd_device *rbd_dev)
+{
int ret;
/* no need to lock here, as rbd_dev is not registered yet */
if (ret)
goto err_out_snaps;
- ret = rbd_dev_set_mapping(rbd_dev);
+ ret = rbd_dev_header_watch_sync(rbd_dev, 1);
+ if (ret)
+ goto err_out_snaps;
+
+ ret = rbd_dev_mapping_set(rbd_dev);
if (ret)
goto err_out_snaps;
if (ret)
goto err_out_disk;
- /*
- * At this point cleanup in the event of an error is the job
- * of the sysfs code (initiated by rbd_bus_del_dev()).
- */
- /* Probe the parent if there is one */
-
- if (rbd_dev->parent_spec) {
- /*
- * We need to pass a reference to the client and the
- * parent spec when creating the parent rbd_dev.
- * Images related by parent/child relationships
- * always share both.
- */
- parent_spec = rbd_spec_get(rbd_dev->parent_spec);
- rbdc = __rbd_get_client(rbd_dev->rbd_client);
-
- parent = rbd_dev_create(rbdc, parent_spec);
- if (!parent) {
- ret = -ENOMEM;
- goto err_out_spec;
- }
- rbdc = NULL; /* parent now owns reference */
- parent_spec = NULL; /* parent now owns reference */
- ret = rbd_dev_image_probe(parent);
- if (ret < 0)
- goto err_out_parent;
- rbd_dev->parent = parent;
- }
-
- ret = rbd_dev_header_watch_sync(rbd_dev, 1);
+ ret = rbd_dev_probe_parent(rbd_dev);
if (ret)
goto err_out_bus;
/* Everything's ready. Announce the disk to the world. */
+ set_capacity(rbd_dev->disk, rbd_dev->mapping.size / SECTOR_SIZE);
+ set_bit(RBD_DEV_FLAG_EXISTS, &rbd_dev->flags);
add_disk(rbd_dev->disk);
pr_info("%s: added with size 0x%llx\n", rbd_dev->disk->disk_name,
return ret;
-err_out_parent:
- rbd_spec_put(rbd_dev->parent_spec);
- kfree(rbd_dev->header_name);
- rbd_dev_destroy(parent);
-err_out_spec:
- rbd_spec_put(parent_spec);
- rbd_put_client(rbdc);
err_out_bus:
/* this will also clean up rest of rbd_dev stuff */
unregister_blkdev(rbd_dev->major, rbd_dev->name);
err_out_id:
rbd_dev_id_put(rbd_dev);
+ rbd_dev_mapping_clear(rbd_dev);
err_out_snaps:
rbd_remove_all_snaps(rbd_dev);
/* done with the id, and with the rbd_dev */
rbd_dev_id_put(rbd_dev);
+ rbd_dev_mapping_clear(rbd_dev);
rbd_assert(rbd_dev->rbd_client != NULL);
rbd_spec_put(rbd_dev->parent_spec);
kfree(rbd_dev->header_name);
module_put(THIS_MODULE);
}
-static void __rbd_remove(struct rbd_device *rbd_dev)
+static void rbd_dev_remove_parent(struct rbd_device *rbd_dev)
{
- rbd_remove_all_snaps(rbd_dev);
- rbd_bus_del_dev(rbd_dev);
+ while (rbd_dev->parent_spec) {
+ struct rbd_device *first = rbd_dev;
+ struct rbd_device *second = first->parent;
+ struct rbd_device *third;
+
+ /*
+ * Follow to the parent with no grandparent and
+ * remove it.
+ */
+ while (second && (third = second->parent)) {
+ first = second;
+ second = third;
+ }
+ rbd_remove_all_snaps(second);
+ rbd_bus_del_dev(second);
+ rbd_spec_put(first->parent_spec);
+ first->parent_spec = NULL;
+ first->parent_overlap = 0;
+ first->parent = NULL;
+ }
}
static ssize_t rbd_remove(struct bus_type *bus,
if (ret < 0)
goto done;
- while (rbd_dev->parent_spec) {
- struct rbd_device *first = rbd_dev;
- struct rbd_device *second = first->parent;
- struct rbd_device *third;
-
- /*
- * Follow to the parent with no grandparent and
- * remove it.
- */
- while (second && (third = second->parent)) {
- first = second;
- second = third;
- }
- __rbd_remove(second);
- rbd_spec_put(first->parent_spec);
- first->parent_spec = NULL;
- first->parent_overlap = 0;
- first->parent = NULL;
- }
- __rbd_remove(rbd_dev);
+ rbd_dev_remove_parent(rbd_dev);
+ rbd_remove_all_snaps(rbd_dev);
+ rbd_bus_del_dev(rbd_dev);
done:
mutex_unlock(&ctl_mutex);
projects / ~andy / linux / blobdiff