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nvme-fc: add a dev_loss_tmo field to the remoteport

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Add a dev_loss_tmo value, paralleling the SCSI FC transport, for device
connectivity loss.

The transport initializes the value in the nvme_fc_register_remoteport()
call. If the value is not set, a default of 60s is set.

Add a new routine to the api, nvme_fc_set_remoteport_devloss() routine,
which allows the lldd to dynamically update the value on an existing
remoteport.

Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
James Smart
2017-10-25 16:43:15 -07:00
committed by Christoph Hellwig
parent 44c6ec77e1
commit ac7fe82b6f
2 changed files with 40 additions and 2 deletions
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11
include/linux/nvme-fc-driver.h
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@@ -40,6 +40,8 @@
* @node_name: FC WWNN for the port
* @port_name: FC WWPN for the port
* @port_role: What NVME roles are supported (see FC_PORT_ROLE_xxx)
* @dev_loss_tmo: maximum delay for reconnects to an association on
* this device. Used only on a remoteport.
*
* Initialization values for dynamic port fields:
* @port_id: FC N_Port_ID currently assigned the port. Upper 8 bits must
@@ -50,6 +52,7 @@ struct nvme_fc_port_info {
u64 port_name;
u32 port_role;
u32 port_id;
u32 dev_loss_tmo;
};
@@ -200,6 +203,9 @@ enum nvme_fc_obj_state {
* The length of the buffer corresponds to the local_priv_sz
* value specified in the nvme_fc_port_template supplied by
* the LLDD.
* @dev_loss_tmo: maximum delay for reconnects to an association on
* this device. To modify, lldd must call
* nvme_fc_set_remoteport_devloss().
*
* Fields with dynamic values. Values may change base on link state. LLDD
* may reference fields directly to change them. Initialized by the
@@ -257,10 +263,9 @@ struct nvme_fc_remote_port {
u32 port_role;
u64 node_name;
u64 port_name;
struct nvme_fc_local_port *localport;
void *private;
u32 dev_loss_tmo;
/* dynamic fields */
u32 port_id;
@@ -446,6 +451,8 @@ int nvme_fc_unregister_remoteport(struct nvme_fc_remote_port *remoteport);
void nvme_fc_rescan_remoteport(struct nvme_fc_remote_port *remoteport);
int nvme_fc_set_remoteport_devloss(struct nvme_fc_remote_port *remoteport,
u32 dev_loss_tmo);
/*