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Subject[PATCH 0/4] add ro state control function for nvdimm drivers
Date
libndctl failed to pass for the reason of writing pmem disk when running
ndctl testing.

Here is the error message below,

namespace6.0: failed to write /dev/pmem6
check_namespaces: namespace6.0 validate_bdev failed
ndctl-test1 failed: -6

Commit 98f49b63e84d4ee1a5c327d0b5f4e8699f6c70fe removes set_device_ro and
e00adcadf3af7a8335026d71ab9f0e0a922191ac adds a new set_read_only method
to allow for driver-specific processing when changing the block device's
read-only state.

Current drivers nd_pmem, nd_blk and nd_btt don't have the capability to
enable or disable write protect (read-only) state. Without that,
blkdev_roset just modifies the value of bd_read_only of struct block_device
and returns success to ioctl of block device. Error would happen when writing
read-only disk next.

Add ro state control function in libnvdimm for this purpose, and implement
set_read_only for BLKROSET.

Huaisheng Ye (4):
libnvdimm: add a ro state control function for nvdimm
libnvdimm/pmem: implement ->set_read_only to hook into BLKROSET
processing
libnvdimm/blk: implement ->set_read_only to hook into BLKROSET
processing
libnvdimm/btt: implement ->set_read_only to hook into BLKROSET
processing

drivers/nvdimm/blk.c | 1 +
drivers/nvdimm/btt.c | 1 +
drivers/nvdimm/bus.c | 17 +++++++++++++++++
drivers/nvdimm/nd.h | 1 +
drivers/nvdimm/pmem.c | 1 +
5 files changed, 21 insertions(+)

--
2.27.0

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