[PATCH] nvme: fc: provide a descriptive error

[PATCH] nvme: fc: provide a descriptive error

[Johannes Thumshirn]

Provide a descriptive error in case an lport to rport association
isn't found when creating the FC-NVME controller.

Currently it's very hard to debug the reason for a failed connect
attempt without a look at the source.

Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>

---
This actually happened to Hannes and me becuase of a typo in a
customer demo today, so yes things like this happen unitl we have a
proper way to do auto-connect.
---
 drivers/nvme/host/fc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/nvme/host/fc.c b/drivers/nvme/host/fc.c
index 6cb26bcf6ec0..8b66879b4ebf 100644
--- a/drivers/nvme/host/fc.c
+++ b/drivers/nvme/host/fc.c
@@ -3284,6 +3284,8 @@ nvme_fc_create_ctrl(struct device *dev, struct nvmf_ctrl_options *opts)
 	}
 	spin_unlock_irqrestore(&nvme_fc_lock, flags);
 
+	pr_warn("%s: %s - %s combination not found\n",
+		__func__, opts->traddr, opts->host_traddr);
 	return ERR_PTR(-ENOENT);
 }
 
-- 
2.16.3

Re: [PATCH] nvme: fc: provide a descriptive error

[James Smart]

On 4/19/2018 10:43 AM, Johannes Thumshirn wrote:
> Provide a descriptive error in case an lport to rport association
> isn't found when creating the FC-NVME controller.
>
> Currently it's very hard to debug the reason for a failed connect
> attempt without a look at the source.
>
> Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
>
> ---
> This actually happened to Hannes and me becuase of a typo in a
> customer demo today, so yes things like this happen unitl we have a
> proper way to do auto-connect.
> ---
>   drivers/nvme/host/fc.c | 2 ++
>   1 file changed, 2 insertions(+)
>
> diff --git a/drivers/nvme/host/fc.c b/drivers/nvme/host/fc.c
> index 6cb26bcf6ec0..8b66879b4ebf 100644
> --- a/drivers/nvme/host/fc.c
> +++ b/drivers/nvme/host/fc.c
> @@ -3284,6 +3284,8 @@ nvme_fc_create_ctrl(struct device *dev, struct nvmf_ctrl_options *opts)
>   	}
>   	spin_unlock_irqrestore(&nvme_fc_lock, flags);
>   
> +	pr_warn("%s: %s - %s combination not found\n",
> +		__func__, opts->traddr, opts->host_traddr);
>   	return ERR_PTR(-ENOENT);
>   }
>   

Signed-off-by:  James Smart  <james.smart@broadcom.com>

Re: [PATCH] nvme: fc: provide a descriptive error

[Hannes Reinecke]

On 04/19/2018 07:43 PM, Johannes Thumshirn wrote:
> Provide a descriptive error in case an lport to rport association
> isn't found when creating the FC-NVME controller.
> 
> Currently it's very hard to debug the reason for a failed connect
> attempt without a look at the source.
> 
> Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
> 
> ---
> This actually happened to Hannes and me because of a typo in a
> customer demo today, so yes things like this happen until we have a
> proper way to do auto-connect.
> ---
>  drivers/nvme/host/fc.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/nvme/host/fc.c b/drivers/nvme/host/fc.c
> index 6cb26bcf6ec0..8b66879b4ebf 100644
> --- a/drivers/nvme/host/fc.c
> +++ b/drivers/nvme/host/fc.c
> @@ -3284,6 +3284,8 @@ nvme_fc_create_ctrl(struct device *dev, struct nvmf_ctrl_options *opts)
>  	}
>  	spin_unlock_irqrestore(&nvme_fc_lock, flags);
>  
> +	pr_warn("%s: %s - %s combination not found\n",
> +		__func__, opts->traddr, opts->host_traddr);
>  	return ERR_PTR(-ENOENT);
>  }
>  
> 
Reviewed-by: Hannes Reinecke <hare@suse.com>

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		   Teamlead Storage & Networking
hare@suse.de			               +49 911 74053 688
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: F. Imendörffer, J. Smithard, J. Guild, D. Upmanyu, G. Norton
HRB 21284 (AG Nürnberg)

Re: [PATCH] nvme: fc: provide a descriptive error

[Keith Busch]

Thanks, staged for 4.18.