This is patch set is a follow-up of the late discussion "Can we drop 'hardware_handler "1 alua"'?". With patch 1/2 in place, I think we can - multipath uses the TPGS flag to determine whether or not the paths support ALUA, and sets the hwhandler accordingly. Unlike the "detect_checker" and "detect_prio" options, I have coded this so that explicit "hardware_hander" settings take priority over autodetection, except for the case in which we determine that TPGS is unsupported. Thus I don't think an additional "detect_hwhandler" config option is necessary. To be actually effective to solve the problems with certain types of IBM IPR controllers, patch 1/2 must be combined with my previous patch "libmultipath: don't reject maps with undefined prio". Patch 2/2 is just a cleanup that looked logical to do after 1/2. Martin Wilck (2): libmultipath: hwhandler auto-detection for ALUA libmultipath/propsel: (re)use static const vars for origin libmultipath/propsel.c | 187 ++++++++++++++++++++++++++++++------------------- 1 file changed, 114 insertions(+), 73 deletions(-) -- 2.16.1 -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
