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Subject[PATCH 0/6] sysfs support for LightNVM
Date
Hi Jens and Keith,

If the patches look good to you, would you pick them up through your
tree?

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.

v2:
- Updated "expose gennvm target type" to expose its own kobject, which
pblk and others can hook into.
- Fixed missing disk_name in null_blk patch on lightnvm device

Thanks,
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 A. F. 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 | 128 +++++++++++++++++-----------
drivers/lightnvm/Makefile | 2 +-
drivers/lightnvm/core.c | 52 +++++-------
drivers/lightnvm/gennvm.c | 112 +++++++++++++++++++++----
drivers/lightnvm/lightnvm.h | 35 ++++++++
drivers/lightnvm/sysfs.c | 195 +++++++++++++++++++++++++++++++++++++++++++
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 | 28 +++++--
14 files changed, 597 insertions(+), 198 deletions(-)
create mode 100644 drivers/lightnvm/lightnvm.h
create mode 100644 drivers/lightnvm/sysfs.c

--
2.1.4

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