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lightnvm: add a bitmap of luns

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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>
This commit is contained in:
Wenwei Tao
2016-03-03 15:06:38 +01:00
committed by Jens Axboe
parent 4c9dacb82d
commit da1e284919
4 changed files with 74 additions and 29 deletions
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6
drivers/lightnvm/core.c
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@@ -464,6 +464,10 @@ static int nvm_core_init(struct nvm_dev *dev)
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 @@ int nvm_register(struct request_queue *q, char *disk_name,
return 0;
err_init:
kfree(dev->lun_map);
kfree(dev);
return ret;
}
@@ -608,6 +613,7 @@ void nvm_unregister(char *disk_name)
up_write(&nvm_lock);
nvm_exit(dev);
kfree(dev->lun_map);
kfree(dev);
}
EXPORT_SYMBOL(nvm_unregister);