On 05/02/2018 08:03 PM, Xiubo Li wrote: > On 2018/5/3 2:27, Mike Christie wrote: >> On 04/19/2018 02:46 AM, xiu...@redhat.com wrote: >>> From: Xiubo Li <xiu...@redhat.com> >>> >>> For some case we need some module wide configfs to contol some >>> attributes of the whole transport module. >> When I suggested to move it module wide I just meant to add another mod >> param like the global max data area param. I like the approach below >> though, because rtslib can work similar to how it does for other >> objects. However for tcmu we will have a mix of types, so I am not sure >> how you are going to deal with compat. Maybe add a module level attrs >> attr and add a max data area there that calls the same mod param code. >> There would still be a kernel where it is not supported though. > But from currently after the tcmu-runner is crashed the > target_core_user.ko will still be kept inserted, something like: > > [root@gblock2 ~]# lsmod |grep target > target_core_pscsi 18799 0 > target_core_file 18217 0 > target_core_iblock 18282 0 > iscsi_target_mod 291661 8 > target_core_user 24557 2 > target_core_mod 340729 18 > target_core_iblock,target_core_pscsi,iscsi_target_mod,target_core_file,target_core_user > > uio 19259 1 target_core_user > crc_t10dif 12912 2 target_core_mod,sd_mod > > If make it a mod param, like this issue how could it be work when the > tcmu-runner is crashed and try to start again?
When you do a module_param_cb it creates a sysfs file in /sys/module/target_core_user/parameters that you can read/write to like any other sysfs file.
