[PATCH ndctl v2 00/10] daxctl: Support for sub-dividing soft-reserved regions

Changes since v1: * Add a Documentation/daxctl/ entry for each patch that adds commands or new option. * Fix functional test suite to only change region 0 and not touch others * Fix reconfigure-device -s changes (third patch) for better bisection. v1: https://lore.kernel.org/linux-nvdimm/20200403205900.18035-1-joao.m.martin... --- This series introduces the daxctl support for sub-dividing soft-reserved regions created by EFI/HMAT/efi_fake_mem. It's the userspace counterpart of this recent patch series [0]. These new 'dynamic' regions can be partitioned into multiple different devices which its subdivisions can consist of one or more ranges. This is in contrast to static dax regions -- created with ndctl-create-namespace -m devdax -- which can't be subdivided neither discontiguous. See also cover-letter of [0]. The daxctl changes in these patches are depicted as: * {create,destroy,disable,enable}-device: These orchestrate/manage the sub-division devices. It mimmics the same as namespaces equivalent commands. * Allow reconfigure-device to change the size of an existing *dynamic* dax device. * Add test coverage (Tried to cover all range allocation code paths). v2 of kernel patches now passes this test suite. * Documentation regarding the new command additions. [0] "device-dax: Support sub-dividing soft-reserved ranges", https://lore.kernel.org/linux-nvdimm/159457116473.754248.7879464730875147... Dan Williams (1): daxctl: Cleanup whitespace Joao Martins (9): libdaxctl: add daxctl_dev_set_size() daxctl: add resize support in reconfigure-device daxctl: add command to disable devdax device daxctl: add command to enable devdax device libdaxctl: add daxctl_region_create_dev() daxctl: add command to create device libdaxctl: add daxctl_region_destroy_dev() daxctl: add command to destroy device daxctl/test: Add tests for dynamic dax regions Documentation/daxctl/Makefile.am | 6 +- Documentation/daxctl/daxctl-create-device.txt | 105 +++++++ Documentation/daxctl/daxctl-destroy-device.txt | 63 +++++ Documentation/daxctl/daxctl-disable-device.txt | 58 ++++ Documentation/daxctl/daxctl-enable-device.txt | 59 ++++ Documentation/daxctl/daxctl-reconfigure-device.txt | 16 ++ daxctl/builtin.h | 4 + daxctl/daxctl.c | 4 + daxctl/device.c | 310 ++++++++++++++++++++- daxctl/lib/libdaxctl.c | 67 +++++ daxctl/lib/libdaxctl.sym | 7 + daxctl/libdaxctl.h | 3 + test/Makefile.am | 1 + test/daxctl-create.sh | 294 +++++++++++++++++++ util/filter.c | 2 +- 15 files changed, 993 insertions(+), 6 deletions(-) create mode 100644 Documentation/daxctl/daxctl-create-device.txt create mode 100644 Documentation/daxctl/daxctl-destroy-device.txt create mode 100644 Documentation/daxctl/daxctl-disable-device.txt create mode 100644 Documentation/daxctl/daxctl-enable-device.txt create mode 100755 test/daxctl-create.sh -- 1.8.3.1