[PATCH 0/4] nvmet: fix configfs attr update handling for discovered subsystems

[Max Gurtovoy]

Hello,
This patch series addresses issues in the NVMe target configfs attribute
handling to ensure subsystem configuration consistency and prevent races
or invalid states once a subsystem has been discovered by a host.

The main goals of this series are:

1. Forbid changes to controller ID min/max attributes values on already
   discovered subsystems.
2. Switch cntlid ida allocation from global to per-subsystem scope,
   matching the granularity of controller ID ranges.
3. Forbid changes to vendor ID and subsystem vendor ID attributes values
   on already discovered subsystems.
4. Forbid changes to max_qid attribute values on already discovered
   subsystems.

This improves consistency by ensuring that user-space configuration
updates do not conflict with controller objects already instantiated in
the kernel.

Max Gurtovoy (4):
  nvmet: forbid changing ctrl ID attributes for discovered subsystems
  nvmet: make cntlid ida per subsystem
  nvmet: prevent max_qid changes for discovered subsystems
  nvmet: prevent vid/ssvid changes for discovered subsystems

 drivers/nvme/target/admin-cmd.c |   6 --
 drivers/nvme/target/configfs.c  | 140 ++++++++++++++++++++++++++------
 drivers/nvme/target/core.c      |  16 ++--
 drivers/nvme/target/nvmet.h     |   1 +
 4 files changed, 125 insertions(+), 38 deletions(-)

-- 
2.18.1