[PATCH V2 0/2] *** Implement the NVMe reservation feature ***

[Guixin Liu]

The version is wrong, please ignore this.

Best regards,

Guixin Liu

在 2024/1/17 16:15, Guixin Liu 写道:
> Hi guys,
>      I've implemented the NVMe reservation feature. Please review it, all
> comments are welcome as usual.
>
> Changes from v2 to v3:
> - Use rcu instead of rwlock to make IO path run faster, and put the rtype
> into the struct nvmet_pr_registrant.
>
> - Limit the resv_log_list to 128.
>
> - Change generation to atomic64.
>
> - Put register rkey check to a warpper.
>
> - Change nr_avl_pages to nr_pages.
>
> - Use NVME_SC_SUCCESS instead of 0.
>
> - Change kmalloc param to let it not sleep in mutex lock.
>
>
> Changes from v1 to v2:
> - Implement the reservation notification report, includes registration
> preempted, reservation released and reservation preempted.
>    And also handle the reservation log page avaliable event and send get
> reservation log page command to clear log page at host.
>
> - Put the reservation check access after validate opcode. And remove
> opcodes which nvmet not implement yet check.
>    Now there is no admin opcode nvmet implemented needs reservation check,
> so I dont add reservation check to admin command path.
>    Next we need to do reservation check includes the situation of nsid is
> 0xffffffff at each admin command path, if it is needed.
>
> - Add reservation commands support in nvmet_get_cmd_effects_nvm().
>
> - From Chaitanya, change the local variable tree style to make it cleaner,
> and add some comments about NVMe spec.
>    And also change others advice from chaitanya.
>
> - Put the nvmet_pr_check_cmd_access and nvmet_parse_pr_cmd into reservation
> enable check warp.
>
> - Remove kmem_cache instead to use kmalloc and kfree.
>
> - Change others advice from Sagi.
>
> - Add a blktest test case, this patch will be sent before these series of
> pathes.
>
> Guixin Liu (2):
>    nvmet: support reservation feature
>    nvmet: unify aer type enum
>
>   drivers/nvme/target/Makefile    |   2 +-
>   drivers/nvme/target/admin-cmd.c |  14 +-
>   drivers/nvme/target/configfs.c  |  27 +
>   drivers/nvme/target/core.c      |  53 +-
>   drivers/nvme/target/discovery.c |   2 +-
>   drivers/nvme/target/nvmet.h     |  33 ++
>   drivers/nvme/target/pr.c        | 979 ++++++++++++++++++++++++++++++++
>   include/linux/nvme.h            |  54 +-
>   8 files changed, 1148 insertions(+), 16 deletions(-)
>   create mode 100644 drivers/nvme/target/pr.c
>