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nbd: allow device creation at a specific index
If users really want to use a particular index for their nbd device and it doesn't already exist there's no reason we can't just create it for them. Do this instead of erroring out. Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
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@ -1584,6 +1584,15 @@ static int nbd_genl_connect(struct sk_buff *skb, struct genl_info *info)
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}
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} else {
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nbd = idr_find(&nbd_index_idr, index);
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if (!nbd) {
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ret = nbd_dev_add(index);
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if (ret < 0) {
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mutex_unlock(&nbd_index_mutex);
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printk(KERN_ERR "nbd: failed to add new device\n");
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return ret;
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}
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nbd = idr_find(&nbd_index_idr, index);
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}
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}
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if (!nbd) {
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printk(KERN_ERR "nbd: couldn't find device at index %d\n",
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