From: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
Hi folks,
Here's the second pass of a nvmet multi-tenant configfs layout,
following what we've learned in target_core_fabric_configfs.c
wrt to independent operation of storage endpoints.
Namely, it allows existing /sys/kernel/config/target/core/ backends
to be configfs symlinked into ../nvmet/subsystems/$SUBSYS_NQN/
as nvme namespaces.
Here is how the running RFC-v2 code currently looks:
/sys/kernel/config/nvmet/subsystems/
└── nqn.2003-01.org.linux-iscsi.NVMf.skylake-ep
├── hosts
├── namespaces
│ └── 1
│ └── ramdisk0 -> ../../../../../target/core/rd_mcp_1/ramdisk0
└── ports
└── loop
├── addr_adrfam
├── addr_portid
├── addr_traddr
├── addr_treq
├── addr_trsvcid
├── addr_trtype
└── enable
The series exposes T10-PI from /sys/kernel/config/target/core/ as
ID_NS.ms + ID_NS.dps feature bits, and enables block integrity
support with nvmet/loop driver.
Note this series depends upon the following prerequisites of
target-core:
http://marc.info/?l=linux-scsi&m=146527281416606&w=2
and of course, last week's earlier release of nvmet + friends:
http://lists.infradead.org/pipermail/linux-nvme/2016-June/004754.html
Note the full set of patches is available from:
https://git.kernel.org/cgit/linux/kernel/git/nab/target-pending.git/log/?h=nvmet-configfs-ng
v2 changes:
- Introduce struct nvmet_port_binding in configfs-ng.c, in order
to support 1:N mappings.
- Convert nvmet_find_get_subsys() + discovery.c logic to use
nvmet_port->port_binding_list.
- Convert nvmet/loop to use nvmet_port_binding. (1:1 mapping)
- Convert nvmet/rdma to use nvmet_port_binding + nvmet_rdma_ports.
(1:N mapping)
- Export nvmf_host_add + generate hostnqn if necessary. (HCH)
- Make nvmet/loop multi-controller allocate it's own nvmf_host
per controller. (HCH)
- Change nvmet_fabric_ops get/put to use nvmf_disc_rsp_page_entry.
- Convert nvmet_genctr to atomic_long_t.
- Enable ../nvmet/subsystems/$NQN/hosts/$HOSTNQN group usage
in configfs-ng.c.
Comments..?
--nab
Nicholas Bellinger (11):
nvme-fabrics: Export nvmf_host_add + generate hostnqn if necessary
nvmet: Add nvmet_fabric_ops get/put transport helpers
nvmet: Add support for configfs-ng multi-tenant logic
nvmet: Hookup nvmet_ns->dev to nvmet_ns_enable
nvmet/loop: Add support for controller-per-port model +
nvmet_port_binding
nvmet/rdma: Convert to struct nvmet_port_binding
nvmet/io-cmd: Hookup sbc_ops->execute_rw backend ops
nvmet/io-cmd: Hookup sbc_ops->execute_sync_cache backend ops
nvmet/io-cmd: Hookup sbc_ops->execute_unmap backend ops
nvmet/admin-cmd: Hookup T10-PI to ID_NS.ms + ID_NS.dps feature bits
nvmet/loop: Add support for bio integrity handling
drivers/nvme/host/fabrics.c | 18 +-
drivers/nvme/host/fabrics.h | 1 +
drivers/nvme/target/Makefile | 2 +-
drivers/nvme/target/admin-cmd.c | 17 +
drivers/nvme/target/configfs-ng.c | 661 ++++++++++++++++++++++++++++++++++++++
drivers/nvme/target/configfs.c | 12 +-
drivers/nvme/target/core.c | 153 ++++++---
drivers/nvme/target/discovery.c | 31 +-
drivers/nvme/target/io-cmd.c | 169 ++++++----
drivers/nvme/target/loop.c | 223 +++++++++++--
drivers/nvme/target/nvmet.h | 67 +++-
drivers/nvme/target/rdma.c | 127 +++++++-
12 files changed, 1317 insertions(+), 164 deletions(-)
create mode 100644 drivers/nvme/target/configfs-ng.c
--
1.9.1
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