The common way to expose a storage device is to export it through the gendisk structure, which takes care of handling the visibility lifetime of the device to user-space and carries device driver and block layer specific sysfs entries. For LightNVM, no gendisk is exposed, which hides these entries. This patchset enables LightNVM to expose a subset of the gendisk entries by implementing a new non-gendisk device that only exposes the sysfs entries that are relevant to the device driver and LightNVM. For example /mq and the NVMe sysfs entries. The new non-gendisk exposes itself in place of the original gendisk. Thus, a gendisk device exposed through /sys/class/nvme/nvme0n1, will still be exposed through the same directory, although only with the /mq, lightnvm and nvme specific entries. The LightNVM storage device can be found through sysfs by searching for devices that has the "lightnvm" dev type. Any feedback is appreciated. Thank you, Matias Matias Bjørling (4): nvme: refactor namespaces to support non-gendisk devices null_blk: refactor to support non-gendisk devices blk-mq: register device instead of disk lightnvm: let drivers control the lifetime of nvm_dev Simon Lund (2): lightnvm: expose device geometry through sysfs lightnvm: expose gennvm target type through sysfs block/blk-mq-sysfs.c | 13 ++- block/blk-sysfs.c | 4 +- drivers/block/null_blk.c | 129 +++++++++++++++++----------- drivers/lightnvm/Makefile | 2 +- drivers/lightnvm/core.c | 52 +++++------ drivers/lightnvm/gennvm.c | 109 +++++++++++++++++++---- drivers/lightnvm/lightnvm.h | 35 ++++++++ drivers/lightnvm/sysfs.c | 200 +++++++++++++++++++++++++++++++++++++++++++ drivers/md/dm.c | 2 +- drivers/nvme/host/core.c | 165 ++++++++++++++++++++--------------- drivers/nvme/host/lightnvm.c | 29 ++++++- drivers/nvme/host/nvme.h | 26 ++++-- include/linux/blk-mq.h | 4 +- include/linux/lightnvm.h | 20 +++-- 14 files changed, 593 insertions(+), 197 deletions(-) create mode 100644 drivers/lightnvm/lightnvm.h create mode 100644 drivers/lightnvm/sysfs.c -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-block" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
