kernel/linux.git/drivers/lightnvm/core.c, branch v4.19.77

lightnvm: pass flag on graceful teardown to targets

2018-06-01T13:43:53+00:00

If the namespace is unregistered before the LightNVM target is removed (e.g., on hot unplug) it is too late for the target to store any metadata on the device - any attempt to write to the device will fail. In this case, pass on a "gracefull teardown" flag to the target to let it know when this happens. In the case of pblk, we pad the open line (close all open chunks) to improve data retention. In the event of an ungraceful shutdown, avoid this part and just clean up. Signed-off-by: Javier González Signed-off-by: Matias Bjørling Signed-off-by: Jens Axboe

lightnvm: implement get log report chunk helpers

2018-03-29T23:29:09+00:00

The 2.0 spec provides a report chunk log page that can be retrieved using the stangard nvme get log page. This replaces the dedicated get/put bad block table in 1.2. This patch implements the helper functions to allow targets retrieve the chunk metadata using get log page. It makes nvme_get_log_ext available outside of nvme core so that we can use it form lightnvm. Signed-off-by: Javier González Signed-off-by: Matias Bjørling Signed-off-by: Jens Axboe

lightnvm: make address conversions depend on generic device

2018-03-29T23:29:09+00:00

On address conversions, use the generic device, instead of the target device. This allows to use conversions outside of the target's realm. Signed-off-by: Javier González Signed-off-by: Matias Bjørling Signed-off-by: Jens Axboe

lightnvm: add support for 2.0 address format

2018-03-29T23:29:09+00:00

Add support for 2.0 address format. Also, align address bits for 1.2 and 2.0 to be able to operate on channel and luns without requiring a format conversion. Use a generic address format for this purpose. Also, convert the generic operations to the generic format in pblk. Signed-off-by: Javier González Signed-off-by: Matias Bjørling Signed-off-by: Jens Axboe

lightnvm: normalize geometry nomenclature

2018-03-29T23:29:09+00:00

Normalize nomenclature for naming channels, luns, chunks, planes and sectors as well as derivations in order to improve readability. Signed-off-by: Javier González Signed-off-by: Matias Bjørling Signed-off-by: Jens Axboe

lightnvm: add minor version to generic geometry

2018-03-29T23:29:09+00:00

Separate the version between major and minor on the generic geometry and represent it through sysfs in the 2.0 path. The 1.2 path only shows the major version to preserve the existing user space interface. Signed-off-by: Javier González Signed-off-by: Matias Bjørling Signed-off-by: Jens Axboe

lightnvm: simplify geometry structure

2018-03-29T23:29:09+00:00

Currently, the device geometry is stored redundantly in the nvm_id and nvm_geo structures at a device level. Moreover, when instantiating targets on a specific number of LUNs, these structures are replicated and manually modified to fit the instance channel and LUN partitioning. Instead, create a generic geometry around nvm_geo, which can be used by (i) the underlying device to describe the geometry of the whole device, and (ii) instances to describe their geometry independently. Signed-off-by: Javier González Signed-off-by: Matias Bjørling Signed-off-by: Jens Axboe

lightnvm: Avoid validation of default op value

2018-03-29T23:29:09+00:00

Fixes: 38401d231de65 ("lightnvm: set target over-provision on create ioctl") Signed-off-by: Heiner Litz Reviewed-by: Javier González Signed-off-by: Matias Bjørling Signed-off-by: Jens Axboe

lightnvm: centralize permission check for lightnvm ioctl

2018-03-29T23:29:09+00:00

Currently all functions for handling the lightnvm core ioctl commands do a check for CAP_SYS_ADMIN. Change this to fail early in nvm_ctl_ioctl(), so we don't have to duplicate the permission checks all over. Signed-off-by: Johannes Thumshirn Signed-off-by: Matias Bjørling Signed-off-by: Jens Axboe

nvme: lightnvm: add late setup of block size and metadata

2018-03-29T23:29:09+00:00

The nvme driver sets up the size of the nvme namespace in two steps. First it initializes the device with standard logical block and metadata sizes, and then sets the correct logical block and metadata size. Due to the OCSSD 2.0 specification relies on the namespace to expose these sizes for correct initialization, let it be updated appropriately on the LightNVM side as well. Signed-off-by: Matias Bjørling Acked-by: Keith Busch Signed-off-by: Jens Axboe