IB/srp: Maintain a single connection per I_T nexus

An SRP target is required to maintain a single connection between initiator and target. This means that if the 'add_target' attribute is used to create a second connection to a target that the first connection will be logged out and that the SCSI error handler will kick in. The SCSI error handler will cause the SRP initiator to reconnect, which will cause I/O over the second connection to fail. Avoid such ping-pong behavior by disabling relogins. Note: if reconnecting manually is necessary, that is possible by deleting and recreating an rport via sysfs.

Signed-off-by Bart Van Assche <[email protected]>

Cc Roland Dreier <[email protected]>

Cc David Dillow <[email protected]>

Cc Vu Pham <vu-VPRAkNaXOzVWk0Htik3J/[email protected]>

Cc Sebastian Riemer <[email protected]>

Quoted 10 lines

An SRP target is required to maintain a single connection between initiator and target. This means that if the 'add_target' attribute is used to create a second connection to a target that the first connection will be logged out and that the SCSI error handler will kick in. The SCSI error handler will cause the SRP initiator to reconnect, which will cause I/O over the second connection to fail. Avoid such ping-pong behavior by disabling relogins. Note: if reconnecting manually is necessary, that is possible by deleting and recreating an rport via sysfs.

Quoted 5 lines

Signed-off-by Bart Van Assche <[email protected]>

Cc Roland Dreier <[email protected]>

Cc David Dillow <[email protected]>

Cc Vu Pham <vu-VPRAkNaXOzVWk0Htik3J/[email protected]>

Cc Sebastian Riemer <[email protected]>

Thanks Bart for refreshing this new patch set. I think you should add Signed-off-by for Sebastian ?