[V5,0/2] nvme: enable char device per namespace

Message

Javier González Feb. 22, 2021, 7:01 p.m. UTC

From: Javier González <[e-mail]>

These two patches enable a char device per namespace, also through
multipath. It is possible to test this in QEMU using Keith's and Klaus'
tree in nvme-next

     http://git.infradead.org/qemu-nvme.git/shortlog/refs/heads/nvme-next

Keith: Regarding nvme-cli support, once this is in place, we will send a
patch to nvme-cli so that this device is shown in verbose mode. Do you
have anu thoughts about this?

Changes since V4
  - Added support for multipath (from Minwoo)
  - Fixed typo in commit message for sysfs naming
  - Rebase into nvme-5.12

Changes since V3
  - Use a dedicated ida for the generic handle
  - Do not abort namespace greation if the generic handle fails

Changes since V2:
  - Apply a number of naming and code structure improvements (from
    Christoph)
  - Use i_cdev to pull struct nvme_ns in the ioctl path instead of
    populating file->private_data (from Christoph)
  - Change char device and sysfs entries to /dev/nvme-generic-XcYnZ to
    follow the hidden device naming scheme (from Christoph and Keith)

Changes since V1:
  - Remove patches 1-3 which are already picked up by Christoph
  - Change the char device and sysfs entries to nvmeXnYc / c signals
    char device
  - Address Minwoo's comments on inline functions and style


Javier González (1):
  nvme: enable char device per namespace

Minwoo Im (1):
  nvme: allow open for nvme-generic char device

 drivers/nvme/host/core.c | 173 +++++++++++++++++++++++++++++++++++----
 drivers/nvme/host/nvme.h |   9 ++
 2 files changed, 165 insertions(+), 17 deletions(-)