lightnvm: add a bitmap of luns
Add a bitmap of luns to indicate the status
of luns: inuse/available. When create targets
do the necessary check to avoid allocating luns
that are already allocated.
Signed-off-by: Wenwei Tao <ww.tao0320@gmail.com>
Freed dev->lun_map if nvm_core_init later failed in the init process.
Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index 2925fd0..0dc9a80 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -464,6 +464,10 @@
dev->nr_luns = dev->luns_per_chnl * dev->nr_chnls;
dev->total_secs = dev->nr_luns * dev->sec_per_lun;
+ dev->lun_map = kcalloc(BITS_TO_LONGS(dev->nr_luns),
+ sizeof(unsigned long), GFP_KERNEL);
+ if (!dev->lun_map)
+ return -ENOMEM;
INIT_LIST_HEAD(&dev->online_targets);
mutex_init(&dev->mlock);
spin_lock_init(&dev->lock);
@@ -586,6 +590,7 @@
return 0;
err_init:
+ kfree(dev->lun_map);
kfree(dev);
return ret;
}
@@ -608,6 +613,7 @@
up_write(&nvm_lock);
nvm_exit(dev);
+ kfree(dev->lun_map);
kfree(dev);
}
EXPORT_SYMBOL(nvm_unregister);