srp_tmo_valid — check timeout combination validity
int srp_tmo_valid ( | int reconnect_delay, |
| int fast_io_fail_tmo, | |
int dev_loss_tmo); |
reconnect_delayReconnect delay in seconds.
fast_io_fail_tmoFast I/O fail timeout in seconds.
dev_loss_tmoDevice loss timeout in seconds.
The combination of the timeout parameters must be such that SCSI commands are finished in a reasonable time. Hence do not allow the fast I/O fail timeout to exceed SCSI_DEVICE_BLOCK_MAX_TIMEOUT nor allow dev_loss_tmo to exceed that limit if failing I/O fast has been disabled. Furthermore, these parameters must be such that multipath can detect failed paths timely. Hence do not allow all three parameters to be disabled simultaneously.