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2017-09-22scsi: add multipath support to qemu-pr-helperPaolo Bonzini
Proper support of persistent reservation for multipath devices requires communication with the multipath daemon, so that the reservation is registered and applied when a path comes up. The device mapper utilities provide a library to do so; this patch makes qemu-pr-helper.c detect multipath devices and, when one is found, delegate the operation to libmpathpersist. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-09-19scsi: move block/scsi.h to include/scsi/constants.hPaolo Bonzini
Complete the transition by renaming this header, which was shared by block/iscsi.c and the SCSI emulation code. Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-09-19scsi: introduce sg_io_sense_from_errnoPaolo Bonzini
Move more knowledge of SG_IO out of hw/scsi/scsi-generic.c, for reusability. Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-09-19scsi: introduce scsi_build_sensePaolo Bonzini
Move more knowledge of sense data format out of hw/scsi/scsi-bus.c for reusability. Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-09-19scsi: move non-emulation specific code to scsi/Paolo Bonzini
util/scsi.c includes some SCSI code that is shared by block/iscsi.c and hw/scsi, but the introduction of the persistent reservation helper will add many more instances of this. There is also include/block/scsi.h, which actually is not part of the core block layer. The persistent reservation manager will also need a home. A scsi/ directory provides one for both the aforementioned shared code and the PR manager code. Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>