The following patches were made over Linus's tree and fix a couple bugs in the pr_ops code when a reservation type other than one of the All Registrants types is used. The current dm pr_ops code works well for All Registrants because any registered path is the reservation holder. Commands like reserve and release can go down any path and the behavior is the same. The problems these patches fix is when only one path is the holder as is the case for the other reservation types which is used by Window Failover Cluster and Linux Cluster (tools like pacemaker + scsi/multipath_fence agents). For example for Registrants Only the path that got the RESERVE command is the reservation holder. The RELEASE must be sent down that path to release the reservation. With our current design we send down non-registration PR commands down whatever path we are currenly using, and then later PR commands end up on different paths. To continue the current design where dm's pr_ops are just passing through requests, and to avoid adding PR state to dm these patches modify pr_reserve/release to work similar to pr_register where we loop over all paths or at least loop over all paths until we find the path we are looking for. -- dm-devel mailing list dm-devel@xxxxxxxxxx https://listman.redhat.com/mailman/listinfo/dm-devel
