lightnvm: move target mgmt into media mgr
To enable persistent block management to easily control creation and
removal of targets, we move target management into the media
manager. The LightNVM core continues to maintain which target types are
registered, while the media manager now keeps track of its initialized
targets.
Two new callbacks for the media manager are introduced. create_tgt and
remove_tgt. Note that remove_tgt returns 0 on successfully removing a
target, and returns 1 if the target was not found.
Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index 8b51d57..d619f6d 100644
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -1,7 +1,9 @@
#ifndef NVM_H
#define NVM_H
+#include <linux/blkdev.h>
#include <linux/types.h>
+#include <uapi/linux/lightnvm.h>
enum {
NVM_IO_OK = 0,
@@ -447,6 +449,8 @@
struct list_head list;
};
+extern struct nvm_tgt_type *nvm_find_target_type(const char *, int);
+
extern int nvm_register_tgt_type(struct nvm_tgt_type *);
extern void nvm_unregister_tgt_type(struct nvm_tgt_type *);
@@ -455,6 +459,9 @@
typedef int (nvmm_register_fn)(struct nvm_dev *);
typedef void (nvmm_unregister_fn)(struct nvm_dev *);
+
+typedef int (nvmm_create_tgt_fn)(struct nvm_dev *, struct nvm_ioctl_create *);
+typedef int (nvmm_remove_tgt_fn)(struct nvm_dev *, struct nvm_ioctl_remove *);
typedef struct nvm_block *(nvmm_get_blk_fn)(struct nvm_dev *,
struct nvm_lun *, unsigned long);
typedef void (nvmm_put_blk_fn)(struct nvm_dev *, struct nvm_block *);
@@ -480,6 +487,9 @@
nvmm_register_fn *register_mgr;
nvmm_unregister_fn *unregister_mgr;
+ nvmm_create_tgt_fn *create_tgt;
+ nvmm_remove_tgt_fn *remove_tgt;
+
/* Block administration callbacks */
nvmm_get_blk_fn *get_blk_unlocked;
nvmm_put_blk_fn *put_blk_unlocked;