Dan Williams 2361db89aa libnvdimm: Notify disk drivers to revalidate region read-only ... Previous kernels allowed the BLKROSET to override the disk's read-only status. With that situation fixed the pmem driver needs to rely on notification events to reevaluate the disk read-only status after the host region has been marked read-write. Recall that when libnvdimm determines that the persistent memory has lost persistence (for example lack of energy to flush from DRAM to FLASH on an NVDIMM-N device) it marks the region read-only, but that state can be overridden by the user via: echo 0 > /sys/bus/nd/devices/regionX/read_only ...to date there is no notification that the region has restored persistence, so the user override is the only recovery. Fixes: 52f019d43c ("block: add a hard-readonly flag to struct gendisk") Reported-by: kernel test robot <lkp@intel.com> Reported-by: Vishal Verma <vishal.l.verma@intel.com> Tested-by: Vishal Verma <vishal.l.verma@intel.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Cc: Christoph Hellwig <hch@lst.de> Cc: Ming Lei <ming.lei@redhat.com> Cc: Martin K. Petersen <martin.petersen@oracle.com> Cc: Hannes Reinecke <hare@suse.de> Cc: Jens Axboe <axboe@kernel.dk> Link: https://lore.kernel.org/r/161534060720.528671.2341213328968989192.stgit@dwillia2-desk3.amr.corp.intel.com Signed-off-by: Dan Williams <dan.j.williams@intel.com>		2021-04-08 22:18:36 -07:00
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badrange.c
blk.c
btt_devs.c
btt.c
btt.h
bus.c	libnvdimm: Notify disk drivers to revalidate region read-only	2021-04-08 22:18:36 -07:00
claim.c
core.c
dax_devs.c
dimm_devs.c
dimm.c
e820.c
Kconfig
label.c
label.h
Makefile
namespace_devs.c
nd_virtio.c
nd-core.h
nd.h
of_pmem.c
pfn_devs.c
pfn.h
pmem.c	libnvdimm: Notify disk drivers to revalidate region read-only	2021-04-08 22:18:36 -07:00
pmem.h
region_devs.c	libnvdimm: Notify disk drivers to revalidate region read-only	2021-04-08 22:18:36 -07:00
region.c
security.c
virtio_pmem.c
virtio_pmem.h