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diff --git a/src/spdk/doc/jsonrpc.md b/src/spdk/doc/jsonrpc.md new file mode 100644 index 00000000..3a93198d --- /dev/null +++ b/src/spdk/doc/jsonrpc.md @@ -0,0 +1,4398 @@ +# JSON-RPC Methods {#jsonrpc} + +# Overview {#jsonrpc_overview} + +SPDK implements a [JSON-RPC 2.0](http://www.jsonrpc.org/specification) server +to allow external management tools to dynamically configure SPDK components. + +## Parameters + +Most of the commands can take parameters. If present, parameter is validated against its domain. If this check fail +whole command will fail with response error message [Invalid params](@ref jsonrpc_error_message). + +### Required parameters + +These parameters are mandatory. If any required parameter is missing RPC command will fail with proper error response. + +### Optional parameters + +Those parameters might be omitted. If an optional parameter is present it must be valid otherwise command will fail +proper error response. + +## Error response message {#jsonrpc_error_message} + +Each error response will contain proper message. As much as possible the message should indicate what went wrong during +command processing. + +There is ongoing effort to customize this messages but some RPC methods just return "Invalid parameters" as message body +for any kind of error. + +Code | Description +------ | ----------- +-1 | Invalid state - given method exists but it is not callable in [current runtime state](@ref rpc_start_subsystem_init) +-32600 | Invalid request - not compliant with JSON-RPC 2.0 Specification +-32601 | Method not found +-32602 | @ref jsonrpc_invalid_params +-32603 | Internal error for e.g.: errors like out of memory +-32700 | @ref jsonrpc_parser_error + +### Parser error {#jsonrpc_parser_error} + +Encountered some error during parsing request like: + +- the JSON object is malformed +- parameter is too long +- request is too long + +### Invalid params {#jsonrpc_invalid_params} + +This type of error is most common one. It mean that there is an error while processing the request like: + +- Parameters decoding in RPC method handler failed because required parameter is missing. +- Unknown parameter present encountered. +- Parameter type doesn't match expected type e.g.: given number when expected a string. +- Parameter domain check failed. +- Request is valid but some other error occurred during processing request. If possible message explains the error reason nature. + +# App Framework {#jsonrpc_components_app} + +## kill_instance {#rpc_kill_instance} + +Send a signal to the application. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +sig_name | Required | string | Signal to send (SIGINT, SIGTERM, SIGQUIT, SIGHUP, or SIGKILL) + +### Example + +Example request: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "method": "kill_instance", + "params": { + "sig_name": "SIGINT" + } +} +~~~ + +Example response: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## context_switch_monitor {#rpc_context_switch_monitor} + +Query, enable, or disable the context switch monitoring functionality. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +enabled | Optional | boolean | Enable (`true`) or disable (`false`) monitoring (omit this parameter to query the current state) + +### Response + +Name | Type | Description +----------------------- | ----------- | ----------- +enabled | boolean | The current state of context switch monitoring + +### Example + +Example request: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "method": "context_switch_monitor", + "params": { + "enabled": false + } +} +~~~ + +Example response: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": { + "enabled": false + } +} +~~~ + +## start_subsystem_init {#rpc_start_subsystem_init} + +Start initialization of SPDK subsystems when it is deferred by starting SPDK application with option -w. +During its deferral some RPCs can be used to set global parameters for SPDK subsystems. +This RPC can be called only once. + +### Parameters + +This method has no parameters. + +### Response + +Completion status of SPDK subsystem initialization is returned as a boolean. + +### Example + +Example request: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "method": "start_subsystem_init" +} +~~~ + +Example response: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## get_rpc_methods {#rpc_get_rpc_methods} + +Get an array of supported RPC methods. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +current | Optional | boolean | Get an array of RPC methods only callable in the current state. + +### Response + +The response is an array of supported RPC methods. + +### Example + +Example request: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "method": "get_rpc_methods" +} +~~~ + +Example response: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": [ + "start_subsystem_init", + "get_rpc_methods", + "get_scsi_devices", + "get_interfaces", + "delete_ip_address", + "add_ip_address", + "get_nbd_disks", + "stop_nbd_disk", + "start_nbd_disk", + "get_trace_flags", + "clear_trace_flag", + "set_trace_flag", + "get_log_level", + "set_log_level", + "get_log_print_level", + "set_log_print_level", + "get_iscsi_global_params", + "target_node_add_lun", + "get_iscsi_connections", + "delete_portal_group", + "add_portal_group", + "get_portal_groups", + "delete_target_node", + "delete_pg_ig_maps", + "add_pg_ig_maps", + "construct_target_node", + "get_target_nodes", + "delete_initiator_group", + "delete_initiators_from_initiator_group", + "add_initiators_to_initiator_group", + "add_initiator_group", + "get_initiator_groups", + "set_iscsi_options", + "set_bdev_options", + "set_bdev_qos_limit_iops", + "set_bdev_qos_limit", + "delete_bdev", + "get_bdevs", + "get_bdevs_iostat", + "get_subsystem_config", + "get_subsystems", + "context_switch_monitor", + "kill_instance", + "scan_ioat_copy_engine", + "construct_virtio_dev", + "construct_virtio_pci_blk_bdev", + "construct_virtio_user_blk_bdev", + "get_virtio_scsi_devs", + "remove_virtio_bdev", + "remove_virtio_scsi_bdev", + "construct_virtio_pci_scsi_bdev", + "construct_virtio_user_scsi_bdev", + "delete_aio_bdev", + "construct_aio_bdev", + "destruct_split_vbdev", + "construct_split_vbdev", + "bdev_inject_error", + "delete_error_bdev", + "construct_error_bdev", + "construct_passthru_bdev", + "apply_nvme_firmware", + "delete_nvme_controller", + "construct_nvme_bdev", + "construct_null_bdev", + "delete_malloc_bdev", + "construct_malloc_bdev", + "get_lvol_stores", + "destroy_lvol_bdev", + "resize_lvol_bdev", + "decouple_parent_lvol_bdev", + "inflate_lvol_bdev", + "rename_lvol_bdev", + "clone_lvol_bdev", + "snapshot_lvol_bdev", + "construct_lvol_bdev", + "destroy_lvol_store", + "rename_lvol_store", + "construct_lvol_store" + ] +} +~~~ + +## get_subsystems {#rpc_get_subsystems} + +Get an array of name and dependency relationship of SPDK subsystems in initialization order. + +### Parameters + +None + +### Response + +The response is an array of name and dependency relationship of SPDK subsystems in initialization order. + +### Example + +Example request: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "method": "get_subsystems" +} +~~~ + +Example response: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": [ + { + "subsystem": "copy", + "depends_on": [] + }, + { + "subsystem": "interface", + "depends_on": [] + }, + { + "subsystem": "net_framework", + "depends_on": [ + "interface" + ] + }, + { + "subsystem": "bdev", + "depends_on": [ + "copy" + ] + }, + { + "subsystem": "nbd", + "depends_on": [ + "bdev" + ] + }, + { + "subsystem": "nvmf", + "depends_on": [ + "bdev" + ] + }, + { + "subsystem": "scsi", + "depends_on": [ + "bdev" + ] + }, + { + "subsystem": "vhost", + "depends_on": [ + "scsi" + ] + }, + { + "subsystem": "iscsi", + "depends_on": [ + "scsi" + ] + } + ] +} +~~~ + +## get_subsystem_config {#rpc_get_subsystem_config} + +Get current configuration of the specified SPDK subsystem + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Required | string | SPDK subsystem name + +### Response + +The response is current configuration of the specified SPDK subsystem. +Null is returned if it is not retrievable by the get_subsystem_config method and empty array is returned if it is empty. + +### Example + +Example request: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "method": "get_subsystem_config", + "params": { + "name": "bdev" + } +} +~~~ + +Example response: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": [ + { + "params": { + "base_bdev": "Malloc2", + "split_size_mb": 0, + "split_count": 2 + }, + "method": "construct_split_vbdev" + }, + { + "params": { + "trtype": "PCIe", + "name": "Nvme1", + "traddr": "0000:01:00.0" + }, + "method": "construct_nvme_bdev" + }, + { + "params": { + "trtype": "PCIe", + "name": "Nvme2", + "traddr": "0000:03:00.0" + }, + "method": "construct_nvme_bdev" + }, + { + "params": { + "block_size": 512, + "num_blocks": 131072, + "name": "Malloc0", + "uuid": "913fc008-79a7-447f-b2c4-c73543638c31" + }, + "method": "construct_malloc_bdev" + }, + { + "params": { + "block_size": 512, + "num_blocks": 131072, + "name": "Malloc1", + "uuid": "dd5b8f6e-b67a-4506-b606-7fff5a859920" + }, + "method": "construct_malloc_bdev" + } + ] +} +~~~ + +# Block Device Abstraction Layer {#jsonrpc_components_bdev} + +## set_bdev_options {#rpc_set_bdev_options} + +Set global parameters for the block device (bdev) subsystem. This RPC may only be called +before SPDK subsystems have been initialized. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +bdev_io_pool_size | Optional | number | Number of spdk_bdev_io structures in shared buffer pool +bdev_io_cache_size | Optional | number | Maximum number of spdk_bdev_io structures cached per thread + +### Example + +Example request: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "method": "set_bdev_options", + "params": { + "bdev_io_pool_size": 65536, + "bdev_io_cache_size": 256 + } +} +~~~ + +Example response: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## get_bdevs {#rpc_get_bdevs} + +Get information about block devices (bdevs). + +### Parameters + +The user may specify no parameters in order to list all block devices, or a block device may be +specified by name. + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Optional | string | Block device name + +### Response + +The response is an array of objects containing information about the requested block devices. + +### Example + +Example request: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "method": "get_bdevs", + "params": { + "name": "Malloc0" + } +} +~~~ + +Example response: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": [ + { + "name": "Malloc0", + "product_name": "Malloc disk", + "block_size": 512, + "num_blocks": 20480, + "claimed": false, + "supported_io_types": { + "read": true, + "write": true, + "unmap": true, + "write_zeroes": true, + "flush": true, + "reset": true, + "nvme_admin": false, + "nvme_io": false + }, + "driver_specific": {} + } + ] +} +~~~ + +## get_bdevs_iostat {#rpc_get_bdevs_iostat} + +Get I/O statistics of block devices (bdevs). + +### Parameters + +The user may specify no parameters in order to list all block devices, or a block device may be +specified by name. + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Optional | string | Block device name + +### Response + +The response is an array of objects containing I/O statistics of the requested block devices. + +### Example + +Example request: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "method": "get_bdevs_iostat", + "params": { + "name": "Nvme0n1" + } +} +~~~ + +Example response: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": [ + { + "tick_rate": 2200000000 + }, + { + "name": "Nvme0n1", + "bytes_read": 36864, + "num_read_ops": 2, + "bytes_written": 0, + "num_write_ops": 0, + "read_latency_ticks": 178904, + "write_latency_ticks": 0, + "queue_depth_polling_period": 2, + "queue_depth": 0, + "io_time": 0, + "weighted_io_time": 0 + } + ] +} +~~~ + +## delete_bdev {#rpc_delete_bdev} + +Unregister a block device. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Required | string | Block device name + +### Example + +Example request: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "method": "delete_bdev", + "params": { + "name": "Malloc0" + } +} +~~~ + +Example response: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## set_bdev_qos_limit {#rpc_set_bdev_qos_limit} + +Set the quality of service rate limit on a bdev. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Required | string | Block device name +rw_ios_per_sec | Optional | number | Number of R/W I/Os per second to allow. 0 means unlimited. +rw_mbytes_per_sec | Optional | number | Number of R/W megabytes per second to allow. 0 means unlimited. + +### Example + +Example request: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "method": "set_bdev_qos_limit", + "params": { + "name": "Malloc0" + "rw_ios_per_sec": 20000 + "rw_mbytes_per_sec": 100 + } +} +~~~ + +Example response: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## construct_malloc_bdev {#rpc_construct_malloc_bdev} + +Construct @ref bdev_config_malloc + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Optional | string | Bdev name to use +block_size | Required | number | Block size in bytes -must be multiple of 512 +num_blocks | Required | number | Number of blocks +uuid | Optional | string | UUID of new bdev + +### Result + +Name of newly created bdev. + +### Example + +Example request: + +~~~ +{ + "params": { + "block_size": 4096, + "num_blocks": 16384, + "name": "Malloc0", + "uuid": "2b6601ba-eada-44fb-9a83-a20eb9eb9e90" + }, + "jsonrpc": "2.0", + "method": "construct_malloc_bdev", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": "Malloc0" +} +~~~ + +## delete_malloc_bdev {#rpc_delete_malloc_bdev} + +Delete @ref bdev_config_malloc + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Required | string | Bdev name + +### Example + +Example request: + +~~~ +{ + "params": { + "name": "Malloc0" + }, + "jsonrpc": "2.0", + "method": "delete_malloc_bdev", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## construct_null_bdev {#rpc_construct_null_bdev} + +Construct @ref bdev_config_null + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Optional | string | Bdev name to use +block_size | Required | number | Block size in bytes +num_blocks | Required | number | Number of blocks +uuid | Optional | string | UUID of new bdev + +### Result + +Name of newly created bdev. + +### Example + +Example request: + +~~~ +{ + "params": { + "block_size": 4096, + "num_blocks": 16384, + "name": "Null0", + "uuid": "2b6601ba-eada-44fb-9a83-a20eb9eb9e90" + }, + "jsonrpc": "2.0", + "method": "construct_null_bdev", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": "Null0" +} +~~~ + +## delete_null_bdev {#rpc_delete_null_bdev} + +Delete @ref bdev_config_null. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Required | string | Bdev name + +### Example + +Example request: + +~~~ +{ + "params": { + "name": "Null0" + }, + "jsonrpc": "2.0", + "method": "delete_null_bdev", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## construct_aio_bdev {#rpc_construct_aio_bdev} + +Construct @ref bdev_config_aio. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Required | string | Bdev name to use +filename | Required | number | Path to device or file +block_size | Optional | number | Block size in bytes + +### Result + +Name of newly created bdev. + +### Example + +Example request: + +~~~ +{ + "params": { + "block_size": 4096, + "name": "Aio0", + "filename": "/tmp/aio_bdev_file" + }, + "jsonrpc": "2.0", + "method": "construct_aio_bdev", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": "Aio0" +} +~~~ + +## delete_aio_bdev {#rpc_delete_aio_bdev} + +Delete @ref bdev_config_aio. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Required | string | Bdev name + +### Example + +Example request: + +~~~ +{ + "params": { + "name": "Aio0" + }, + "jsonrpc": "2.0", + "method": "delete_aio_bdev", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## set_bdev_nvme_options {#rpc_set_bdev_nvme_options} + +Set global parameters for all bdev NVMe. This RPC may only be called before SPDK subsystems have been initialized. + +### Parameters + +Name | Optional | Type | Description +-------------------------- | -------- | ----------- | ----------- +action_on_timeout | Optional | string | Action to take on command time out: none, reset or abort +timeout_us | Optional | number | Timeout for each command, in microseconds. If 0, don't track timeouts +retry_count | Optional | number | The number of attempts per I/O before an I/O fails +nvme_adminq_poll_period_us | Optional | number | How often the admin queue is polled for asynchronous events in microsecond + +### Example + +Example request: + +~~~ +request: +{ + "params": { + "retry_count": 5, + "nvme_adminq_poll_period_us": 2000, + "timeout_us": 10000000, + "action_on_timeout": "reset" + }, + "jsonrpc": "2.0", + "method": "set_bdev_nvme_options", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## set_bdev_nvme_hotplug {#rpc_set_bdev_nvme_hotplug} + +Change settings of the NVMe hotplug feature. If enabled, PCIe NVMe bdevs will be automatically discovered on insertion +and deleted on removal. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +enabled | Required | string | True to enable, false to disable +period_us | Optional | number | How often to poll for hot-insert and hot-remove events. Values: 0 - reset/use default or 1 to 10000000. + +### Example + +Example request: + +~~~ +request: +{ + "params": { + "enabled": true, + "period_us": 2000 + }, + "jsonrpc": "2.0", + "method": "set_bdev_nvme_hotplug", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## construct_nvme_bdev {#rpc_construct_nvme_bdev} + +Construct @ref bdev_config_nvme + +### Result + +Array of names of newly created bdevs. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Required | string | Bdev name +trtype | Required | string | NVMe-oF target trtype: rdma or pcie +traddr | Required | string | NVMe-oF target address: ip or BDF +adrfam | Optional | string | NVMe-oF target adrfam: ipv4, ipv6, ib, fc, intra_host +trsvcid | Optional | string | NVMe-oF target trsvcid: port number +subnqn | Optional | string | NVMe-oF target subnqn +hostnqn | Optional | string | NVMe-oF target hostnqn + +### Example + +Example request: + +~~~ +{ + "params": { + "trtype": "pcie", + "name": "Nvme0", + "traddr": "0000:0a:00.0" + }, + "jsonrpc": "2.0", + "method": "construct_nvme_bdev", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": [ + "Nvme0n1" + ] +} +~~~ + +## get_nvme_controllers {#rpc_get_nvme_controllers} + +Get information about NVMe controllers. + +### Parameters + +The user may specify no parameters in order to list all NVMe controllers, or one NVMe controller may be +specified by name. + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Optional | string | NVMe controller name + +### Response + +The response is an array of objects containing information about the requested NVMe controllers. + +### Example + +Example request: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "method": "get_nvme_controllers", + "params": { + "name": "Nvme0" + } +} +~~~ + +Example response: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": [ + { + "name": "Nvme0", + "trid": { + "trtype": "PCIe", + "traddr": "0000:05:00.0" + } + } + ] +} +~~~ + +## delete_nvme_controller {#rpc_delete_nvme_controller} + +Delete NVMe controller. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Required | string | Controller name + +### Example + +Example requests: + +~~~ +{ + "params": { + "name": "Nvme0" + }, + "jsonrpc": "2.0", + "method": "delete_nvme_controller", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## construct_rbd_bdev {#rpc_construct_rbd_bdev} + +Construct @ref bdev_config_rbd bdev + +This method is available only if SPDK was build with Ceph RBD support. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Optional | string | Bdev name +pool_name | Required | string | Pool name +rbd_name | Required | string | Image name +block_size | Required | number | Block size + +### Result + +Name of newly created bdev. + +### Example + +Example request: + +~~~ +{ + "params": { + "pool_name": "rbd", + "rbd_name": "foo", + "block_size": 4096 + }, + "jsonrpc": "2.0", + "method": "construct_rbd_bdev", + "id": 1 +} +~~~ + +Example response: + +~~~ +response: +{ + "jsonrpc": "2.0", + "id": 1, + "result": "Ceph0" +} +~~~ + +## delete_rbd_bdev {#rpc_delete_rbd_bdev} + +Delete @ref bdev_config_rbd bdev + +This method is available only if SPDK was build with Ceph RBD support. + +### Result + +`true` if bdev with provided name was deleted or `false` otherwise. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Required | string | Bdev name + +### Example + +Example request: + +~~~ +{ + "params": { + "name": "Rbd0" + }, + "jsonrpc": "2.0", + "method": "delete_rbd_bdev", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## construct_error_bdev {#rpc_construct_error_bdev} + +Construct error bdev. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +base_name | Required | string | Base bdev name + +### Example + +Example request: + +~~~ +{ + "params": { + "base_name": "Malloc0" + }, + "jsonrpc": "2.0", + "method": "construct_error_bdev", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## delete_error_bdev {#rpc_delete_error_bdev} + +Delete error bdev + +### Result + +`true` if bdev with provided name was deleted or `false` otherwise. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Required | string | Error bdev name + +### Example + +Example request: + +~~~ +{ + "params": { + "name": "EE_Malloc0" + }, + "jsonrpc": "2.0", + "method": "delete_error_bdev", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## construct_iscsi_bdev {#rpc_construct_iscsi_bdev} + +Connect to iSCSI target and create bdev backed by this connection. + +This method is available only if SPDK was build with iSCSI initiator support. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Required | string | Bdev name +initiator_iqn | Required | string | IQN name used during connection +url | Required | string | iSCSI resource URI + +### Result + +Name of newly created bdev. + +### Example + +Example request: + +~~~ +{ + "params": { + "url": "iscsi://127.0.0.1/iqn.2016-06.io.spdk:disk1/0", + "initiator_iqn": "iqn.2016-06.io.spdk:init", + "name": "iSCSI0" + }, + "jsonrpc": "2.0", + "method": "construct_iscsi_bdev", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": "iSCSI0" +} +~~~ + +## delete_iscsi_bdev {#rpc_delete_iscsi_bdev} + +Delete iSCSI bdev and terminate connection to target. + +This method is available only if SPDK was built with iSCSI initiator support. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Required | string | Bdev name + +### Example + +Example request: + +~~~ +{ + "params": { + "name": "iSCSI0" + }, + "jsonrpc": "2.0", + "method": "delete_iscsi_bdev", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + + +## create_pmem_pool {#rpc_create_pmem_pool} + +Create a @ref bdev_config_pmem blk pool file. It is equivalent of following `pmempool create` command: + +~~~ +pmempool create -s $((num_blocks * block_size)) blk $block_size $pmem_file +~~~ + +This method is available only if SPDK was built with PMDK support. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +pmem_file | Required | string | Path to new pmem file +num_blocks | Required | number | Number of blocks +block_size | Required | number | Size of each block in bytes + +### Example + +Example request: + +~~~ +{ + "params": { + "block_size": 512, + "num_blocks": 131072, + "pmem_file": "/tmp/pmem_file" + }, + "jsonrpc": "2.0", + "method": "create_pmem_pool", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## pmem_pool_info {#rpc_pmem_pool_info} + +Retrieve basic information about PMDK memory pool. + +This method is available only if SPDK was built with PMDK support. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +pmem_file | Required | string | Path to existing pmem file + +### Result + +Array of objects describing memory pool: + +Name | Type | Description +----------------------- | ----------- | ----------- +num_blocks | number | Number of blocks +block_size | number | Size of each block in bytes + +### Example + +Example request: + +~~~ +request: +{ + "params": { + "pmem_file": "/tmp/pmem_file" + }, + "jsonrpc": "2.0", + "method": "pmem_pool_info", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": [ + { + "block_size": 512, + "num_blocks": 129728 + } + ] +} +~~~ + +## delete_pmem_pool {#rpc_delete_pmem_pool} + +Delete pmem pool by removing file `pmem_file`. This method will fail if `pmem_file` is not a +valid pmem pool file. + +This method is available only if SPDK was built with PMDK support. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +pmem_file | Required | string | Path to new pmem file + +### Example + +Example request: + +~~~ +{ + "params": { + "pmem_file": "/tmp/pmem_file" + }, + "jsonrpc": "2.0", + "method": "delete_pmem_pool", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## construct_pmem_bdev {#rpc_construct_pmem_bdev} + +Construct @ref bdev_config_pmem bdev. + +This method is available only if SPDK was built with PMDK support. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Required | string | Bdev name +pmem_file | Required | string | Path to existing pmem blk pool file + +### Result + +Name of newly created bdev. + +### Example + +Example request: + +~~~ +{ + "params": { + "pmem_file": "/tmp/pmem_file", + "name": "Pmem0" + }, + "jsonrpc": "2.0", + "method": "construct_pmem_bdev", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": "Pmem0" +} +~~~ + +## delete_pmem_bdev {#rpc_delete_pmem_bdev} + +Delete @ref bdev_config_pmem bdev. This call will not remove backing pool files. + +This method is available only if SPDK was built with PMDK support. + +### Result + +`true` if bdev with provided name was deleted or `false` otherwise. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Required | string | Bdev name + +### Example + +Example request: + +~~~ +{ + "params": { + "name": "Pmem0" + }, + "jsonrpc": "2.0", + "method": "delete_pmem_bdev", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## construct_passthru_bdev {#rpc_construct_passthru_bdev} + +Create passthru bdev. This bdev type redirects all IO to it's base bdev. It has no other purpose than being an example +and a starting point in development of new bdev type. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +passthru_bdev_name | Required | string | Bdev name +base_bdev_name | Required | string | Base bdev name + +### Result + +Name of newly created bdev. + +### Example + +Example request: + +~~~ +{ + "params": { + "base_bdev_name": "Malloc0", + "passthru_bdev_name": "Passsthru0" + }, + "jsonrpc": "2.0", + "method": "construct_passthru_bdev", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": "Passsthru0" +} +~~~ + +## delete_passthru_bdev {#rpc_delete_passthru_bdev} + +Delete passthru bdev. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Required | string | Bdev name + +### Example + +Example request: + +~~~ +{ + "params": { + "name": "Passsthru0" + }, + "jsonrpc": "2.0", + "method": "delete_passthru_bdev", + "id": 1 +} + +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## construct_virtio_dev {#rpc_construct_virtio_dev} + +Create new initiator @ref bdev_config_virtio_scsi or @ref bdev_config_virtio_blk and expose all found bdevs. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Required | string | Virtio SCSI base bdev name or Virtio Blk bdev name +trtype | Required | string | Virtio target trtype: pci or user +traddr | Required | string | target address: BDF or UNIX socket file path +dev_type | Required | string | Virtio device type: blk or scsi +vq_count | Optional | number | Number of queues this controller will utilize (default: 1) +vq_size | Optional | number | Size of each queue. Must be power of 2. (default: 512) + +In case of Virtio SCSI the `name` parameter will be base name for new created bdevs. For Virtio Blk `name` will be the +name of created bdev. + +`vq_count` and `vq_size` parameters are valid only if `trtype` is `user`. + +### Result + +Array of names of newly created bdevs. + +### Example + +Example request: + +~~~ +{ + "params": { + "name": "VirtioScsi0", + "trtype": "user", + "vq_size": 128, + "dev_type": "scsi", + "traddr": "/tmp/VhostScsi0", + "vq_count": 4 + }, + "jsonrpc": "2.0", + "method": "construct_virtio_dev", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": ["VirtioScsi0t2", "VirtioScsi0t4"] +} +~~~ + +## construct_virtio_user_scsi_bdev {#rpc_construct_virtio_user_scsi_bdev} + +This is legacy RPC method. It is equivalent of @ref rpc_construct_virtio_dev with `trtype` set to `user` and `dev_type` set to `scsi`. + +Because it will be deprecated soon it is intentionally undocumented. + + +## construct_virtio_pci_scsi_bdev {#rpc_construct_virtio_pci_scsi_bdev} + +This is legacy RPC method. It is equivalent of @ref rpc_construct_virtio_dev with `trtype` set to `pci` and `dev_type` set to `scsi`. + +Because it will be deprecated soon it is intentionally undocumented. + +## construct_virtio_user_blk_bdev {#rpc_construct_virtio_user_blk_bdev} + +This is legacy RPC method. It is equivalent of @ref rpc_construct_virtio_dev with `trtype` set to `user` and `dev_type` set to `blk`. + +Because it will be deprecated soon it is intentionally undocumented. + + +## construct_virtio_pci_blk_bdev {#rpc_construct_virtio_pci_blk_bdev} + +This is legacy RPC method. It is equivalent of @ref rpc_construct_virtio_dev with `trtype` set to `pci` and `dev_type` set to `blk`. + +Because it will be deprecated soon it is intentionally undocumented. + +## get_virtio_scsi_devs {#rpc_get_virtio_scsi_devs} + +Show information about all available Virtio SCSI devices. + +### Parameters + +This method has no parameters. + +### Result + +Array of Virtio SCSI information objects. + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "method": "get_virtio_scsi_devs", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": [ + { + "name": "VirtioScsi0", + "virtio": { + "vq_size": 128, + "vq_count": 4, + "type": "user", + "socket": "/tmp/VhostScsi0" + } + } + ] +} +~~~ + +## remove_virtio_bdev {#rpc_remove_virtio_bdev} + +Remove a Virtio device. This command can be used to remove any type of virtio device. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Required | string | Virtio name + +### Example + +Example request: + +~~~ +{ + "params": { + "name": "VirtioUser0" + }, + "jsonrpc": "2.0", + "method": "remove_virtio_bdev", + "id": 1 +} + +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +# iSCSI Target {#jsonrpc_components_iscsi_tgt} + +## set_iscsi_options method {#rpc_set_iscsi_options} + +Set global parameters for iSCSI targets. + +This RPC may only be called before SPDK subsystems have been initialized. This RPC can be called only once. + +### Parameters + +Name | Optional | Type | Description +--------------------------- | -------- | ------- | ----------- +auth_file | Optional | string | Path to CHAP shared secret file (default: "") +node_base | Optional | string | Prefix of the name of iSCSI target node (default: "iqn.2016-06.io.spdk") +nop_timeout | Optional | number | Timeout in seconds to nop-in request to the initiator (default: 60) +nop_in_interval | Optional | number | Time interval in secs between nop-in requests by the target (default: 30) +disable_chap | Optional | boolean | CHAP for discovery session should be disabled (default: `false`) +require_chap | Optional | boolean | CHAP for discovery session should be required (default: `false`) +mutual_chap | Optional | boolean | CHAP for discovery session should be unidirectional (`false`) or bidirectional (`true`) (default: `false`) +chap_group | Optional | number | CHAP group ID for discovery session (default: 0) +max_sessions | Optional | number | Maximum number of sessions in the host (default: 128) +max_queue_depth | Optional | number | Maximum number of outstanding I/Os per queue (default: 64) +max_connections_per_session | Optional | number | Session specific parameter, MaxConnections (default: 2) +default_time2wait | Optional | number | Session specific parameter, DefaultTime2Wait (default: 2) +default_time2retain | Optional | number | Session specific parameter, DefaultTime2Retain (default: 20) +first_burst_length | Optional | number | Session specific parameter, FirstBurstLength (default: 8192) +immediate_data | Optional | boolean | Session specific parameter, ImmediateData (default: `true`) +error_recovery_level | Optional | number | Session specific parameter, ErrorRecoveryLevel (default: 0) +allow_duplicated_isid | Optional | boolean | Allow duplicated initiator session ID (default: `false`) +min_connections_per_core | Optional | number | Allocation unit of connections per core (default: 4) + +To load CHAP shared secret file, its path is required to specify explicitly in the parameter `auth_file`. + +Parameters `disable_chap` and `require_chap` are mutually exclusive. Parameters `no_discovery_auth`, `req_discovery_auth`, `req_discovery_auth_mutual`, and `discovery_auth_group` are still available instead of `disable_chap`, `require_chap`, `mutual_chap`, and `chap_group`, respectivey but will be removed in future releases. + +### Example + +Example request: + +~~~ +{ + "params": { + "allow_duplicated_isid": true, + "default_time2retain": 60, + "first_burst_length": 8192, + "immediate_data": true, + "node_base": "iqn.2016-06.io.spdk", + "max_sessions": 128, + "nop_timeout": 30, + "nop_in_interval": 30, + "auth_file": "/usr/local/etc/spdk/auth.conf", + "disable_chap": true, + "default_time2wait": 2 + }, + "jsonrpc": "2.0", + "method": "set_iscsi_options", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## get_iscsi_global_params method {#rpc_get_iscsi_global_params} + +Show global parameters of iSCSI targets. + +### Parameters + +This method has no parameters. + +### Example + +Example request: + +~~~ +request: +{ + "jsonrpc": "2.0", + "method": "get_iscsi_global_params", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": { + "allow_duplicated_isid": true, + "default_time2retain": 60, + "first_burst_length": 8192, + "immediate_data": true, + "node_base": "iqn.2016-06.io.spdk", + "mutual_chap": false, + "nop_in_interval": 30, + "chap_group": 0, + "max_connections_per_session": 2, + "max_queue_depth": 64, + "nop_timeout": 30, + "max_sessions": 128, + "error_recovery_level": 0, + "auth_file": "/usr/local/etc/spdk/auth.conf", + "min_connections_per_core": 4, + "disable_chap": true, + "default_time2wait": 2, + "require_chap": false + } +} +~~~ +## set_iscsi_discovery_auth method {#rpc_set_iscsi_discovery_auth} + +Set CHAP authentication for sessions dynamically. + +### Parameters + +Name | Optional | Type | Description +--------------------------- | -------- | --------| ----------- +disable_chap | Optional | boolean | CHAP for discovery session should be disabled (default: `false`) +require_chap | Optional | boolean | CHAP for discovery session should be required (default: `false`) +mutual_chap | Optional | boolean | CHAP for discovery session should be unidirectional (`false`) or bidirectional (`true`) (default: `false`) +chap_group | Optional | number | CHAP group ID for discovery session (default: 0) + +Parameters `disable_chap` and `require_chap` are mutually exclusive. + +### Example + +Example request: + +~~~ +request: +{ + "params": { + "chap_group": 1, + "require_chap": true, + "mutual_chap": true + }, + "jsonrpc": "2.0", + "method": "set_iscsi_discovery_auth", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## add_iscsi_auth_group method {#rpc_add_iscsi_auth_group} + +Add an authentication group for CHAP authentication. + +### Parameters + +Name | Optional | Type | Description +--------------------------- | -------- | --------| ----------- +tag | Required | number | Authentication group tag (unique, integer > 0) +secrets | Optional | array | Array of @ref rpc_add_iscsi_auth_group_secret objects + +### secret {#rpc_add_iscsi_auth_group_secret} + +Name | Optional | Type | Description +--------------------------- | ---------| --------| ----------- +user | Required | string | Unidirectional CHAP name +secret | Required | string | Unidirectional CHAP secret +muser | Optional | string | Bidirectional CHAP name +msecret | Optional | string | Bidirectional CHAP secret + +### Example + +Example request: + +~~~ +{ + "params": { + "secrets": [ + { + "muser": "mu1", + "secret": "s1", + "user": "u1", + "msecret": "ms1" + } + ], + "tag": 2 + }, + "jsonrpc": "2.0", + "method": "add_iscsi_auth_group", + "id": 1 +} +~~~ + +Example response: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## delete_iscsi_auth_group method {#rpc_delete_iscsi_auth_group} + +Delete an existing authentication group for CHAP authentication. + +### Parameters + +Name | Optional | Type | Description +--------------------------- | -------- | --------| ----------- +tag | Required | number | Authentication group tag (unique, integer > 0) + +### Example + +Example request: + +~~~ +{ + "params": { + "tag": 2 + }, + "jsonrpc": "2.0", + "method": "delete_iscsi_auth_group", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## get_iscsi_auth_groups {#rpc_get_iscsi_auth_groups} + +Show information about all existing authentication group for CHAP authentication. + +### Parameters + +This method has no parameters. + +### Result + +Array of objects describing authentication group. + +Name | Type | Description +--------------------------- | --------| ----------- +tag | number | Authentication group tag +secrets | array | Array of @ref rpc_add_iscsi_auth_group_secret objects + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "method": "get_iscsi_auth_groups", + "id": 1 +} +~~~ +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": [ + { + "secrets": [ + { + "muser": "mu1", + "secret": "s1", + "user": "u1", + "msecret": "ms1" + } + ], + "tag": 1 + }, + { + "secrets": [ + { + "secret": "s2", + "user": "u2" + } + ], + "tag": 2 + } + ] +} +~~~ + +## add_secret_to_iscsi_auth_group {#rpc_add_secret_to_iscsi_auth_group} + +Add a secret to an existing authentication group for CHAP authentication. + +### Parameters + +Name | Optional | Type | Description +--------------------------- | -------- | --------| ----------- +tag | Required | number | Authentication group tag (unique, integer > 0) +user | Required | string | Unidirectional CHAP name +secret | Required | string | Unidirectional CHAP secret +muser | Optional | string | Bidirectional CHAP name +msecret | Optional | string | Bidirectional CHAP secret + +### Example + +Example request: + +~~~ +{ + "params": { + "muser": "mu3", + "secret": "s3", + "tag": 2, + "user": "u3", + "msecret": "ms3" + }, + "jsonrpc": "2.0", + "method": "add_secret_to_iscsi_auth_group", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## delete_secret_from_iscsi_auth_group {#rpc_delete_secret_from_iscsi_auth_group} + +Delete a secret from an existing authentication group for CHAP authentication. + +### Parameters + +Name | Optional | Type | Description +--------------------------- | -------- | --------| ----------- +tag | Required | number | Authentication group tag (unique, integer > 0) +user | Required | string | Unidirectional CHAP name + +### Example + +Example request: + +~~~ +{ + "params": { + "tag": 2, + "user": "u3" + }, + "jsonrpc": "2.0", + "method": "delete_secret_from_iscsi_auth_group", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## get_initiator_groups method {#rpc_get_initiator_groups} + +Show information about all available initiator groups. + +### Parameters + +This method has no parameters. + +### Result + +Array of objects describing initiator groups. + +Name | Type | Description +--------------------------- | --------| ----------- +tag | number | Initiator group tag +initiators | array | Array of initiator hostnames or IP addresses +netmasks | array | Array of initiator netmasks + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "method": "get_initiator_groups", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": [ + { + "initiators": [ + "iqn.2016-06.io.spdk:host1", + "iqn.2016-06.io.spdk:host2" + ], + "tag": 1, + "netmasks": [ + "192.168.1.0/24" + ] + } + ] +} +~~~ + +## add_initiator_group method {#rpc_add_initiator_group} + +Add an initiator group. + +### Parameters + +Name | Optional | Type | Description +--------------------------- | -------- | --------| ----------- +tag | Required | number | Initiator group tag (unique, integer > 0) +initiators | Required | array | Not empty array of initiator hostnames or IP addresses +netmasks | Required | array | Not empty array of initiator netmasks + +### Example + +Example request: + +~~~ +{ + "params": { + "initiators": [ + "iqn.2016-06.io.spdk:host1", + "iqn.2016-06.io.spdk:host2" + ], + "tag": 1, + "netmasks": [ + "192.168.1.0/24" + ] + }, + "jsonrpc": "2.0", + "method": "add_initiator_group", + "id": 1 +} +~~~ + +Example response: + +~~~ +response: +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## delete_initiator_group method {#rpc_delete_initiator_group} + +Delete an existing initiator group. + +### Parameters + +Name | Optional | Type | Description +--------------------------- | -------- | --------| ----------- +tag | Required | number | Initiator group tag (unique, integer > 0) + +### Example + +Example request: + +~~~ +{ + "params": { + "tag": 1 + }, + "jsonrpc": "2.0", + "method": "delete_initiator_group", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## add_initiators_to_initiator_group method {#rpc_add_initiators_to_initiator_group} + +Add initiators to an existing initiator group. + +### Parameters + +Name | Optional | Type | Description +--------------------------- | -------- | --------| ----------- +tag | Required | number | Existing initiator group tag. +initiators | Optional | array | Array of initiator hostnames or IP addresses +netmasks | Optional | array | Array of initiator netmasks + +### Example + +Example request: + +~~~ +request: +{ + "params": { + "initiators": [ + "iqn.2016-06.io.spdk:host3" + ], + "tag": 1, + "netmasks": [ + "255.255.255.1" + ] + }, + "jsonrpc": "2.0", + "method": "add_initiators_to_initiator_group", + "id": 1 +} +~~~ + +Example response: + +~~~ +response: +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## get_target_nodes method {#rpc_get_target_nodes} + +Show information about all available iSCSI target nodes. + +### Parameters + +This method has no parameters. + +### Result + +Array of objects describing target node. + +Name | Type | Description +--------------------------- | --------| ----------- +name | string | Target node name (ASCII) +alias_name | string | Target node alias name (ASCII) +pg_ig_maps | array | Array of Portal_Group_Tag:Initiator_Group_Tag mappings +luns | array | Array of Bdev names to LUN ID mappings +queue_depth | number | Target queue depth +disable_chap | boolean | CHAP authentication should be disabled for this target +require_chap | boolean | CHAP authentication should be required for this target +mutual_chap | boolean | CHAP authentication should be bidirectional (`true`) or unidirectional (`false`) +chap_group | number | Authentication group ID for this target node +header_digest | boolean | Header Digest should be required for this target node +data_digest | boolean | Data Digest should be required for this target node + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "method": "get_target_nodes", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": [ + { + "luns": [ + { + "lun_id": 0, + "bdev_name": "Nvme0n1" + } + ], + "mutual_chap": false, + "name": "iqn.2016-06.io.spdk:target1", + "alias_name": "iscsi-target1-alias", + "require_chap": false, + "chap_group": 0, + "pg_ig_maps": [ + { + "ig_tag": 1, + "pg_tag": 1 + } + ], + "data_digest": false, + "disable_chap": false, + "header_digest": false, + "queue_depth": 64 + } + ] +} +~~~ + +## construct_target_node method {#rpc_construct_target_node} + +Add a iSCSI target node. + +### Parameters + +Name | Optional | Type | Description +--------------------------- | -------- | --------| ----------- +name | Required | string | Target node name (ASCII) +alias_name | Required | string | Target node alias name (ASCII) +pg_ig_maps | Required | array | Array of (Portal_Group_Tag:Initiator_Group_Tag) mappings +luns | Required | array | Array of Bdev names to LUN ID mappings +queue_depth | Required | number | Target queue depth +disable_chap | Optional | boolean | CHAP authentication should be disabled for this target +require_chap | Optional | boolean | CHAP authentication should be required for this target +mutual_chap | Optional | boolean | CHAP authentication should be bidirectional (`true`) or unidirectional (`false`) +chap_group | Optional | number | Authentication group ID for this target node +header_digest | Optional | boolean | Header Digest should be required for this target node +data_digest | Optional | boolean | Data Digest should be required for this target node + +Parameters `disable_chap` and `require_chap` are mutually exclusive. + +### Example + +Example request: + +~~~ +{ + "params": { + "luns": [ + { + "lun_id": 0, + "bdev_name": "Nvme0n1" + } + ], + "mutual_chap": true, + "name": "target2", + "alias_name": "iscsi-target2-alias", + "pg_ig_maps": [ + { + "ig_tag": 1, + "pg_tag": 1 + }, + { + "ig_tag": 2, + "pg_tag": 2 + } + ], + "data_digest": true, + "disable_chap": true, + "header_digest": true, + "queue_depth": 24 + }, + "jsonrpc": "2.0", + "method": "construct_target_node", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## set_iscsi_target_node_auth method {#rpc_set_iscsi_target_node_auth} + +Set CHAP authentication to an existing iSCSI target node. + +### Parameters + +Name | Optional | Type | Description +--------------------------- | -------- | --------| ----------- +name | Required | string | Target node name (ASCII) +disable_chap | Optional | boolean | CHAP authentication should be disabled for this target +require_chap | Optional | boolean | CHAP authentication should be required for this target +mutual_chap | Optional | boolean | CHAP authentication should be bidirectional (`true`) or unidirectional (`false`) +chap_group | Optional | number | Authentication group ID for this target node + +Parameters `disable_chap` and `require_chap` are mutually exclusive. + +### Example + +Example request: + +~~~ +{ + "params": { + "chap_group": 1, + "require_chap": true, + "name": "iqn.2016-06.io.spdk:target1", + "mutual_chap": true + }, + "jsonrpc": "2.0", + "method": "set_iscsi_target_node_auth", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## add_pg_ig_maps method {#rpc_add_pg_ig_maps} + +Add initiator group to portal group mappings to an existing iSCSI target node. + +### Parameters + +Name | Optional | Type | Description +--------------------------- | -------- | --------| ----------- +name | Required | string | Target node name (ASCII) +pg_ig_maps | Required | array | Not empty array of initiator to portal group mappings objects + +Portal to Initiator group mappings object: + +Name | Optional | Type | Description +--------------------------- | -------- | --------| ----------- +ig_tag | Required | number | Existing initiator group tag +pg_tag | Required | number | Existing portal group tag + +### Example + +Example request: + +~~~ +{ + "params": { + "pg_ig_maps": [ + { + "ig_tag": 1, + "pg_tag": 1 + }, + { + "ig_tag": 2, + "pg_tag": 2 + }, + { + "ig_tag": 3, + "pg_tag": 3 + } + ], + "name": "iqn.2016-06.io.spdk:target3" + }, + "jsonrpc": "2.0", + "method": "add_pg_ig_maps", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## delete_pg_ig_maps method {#rpc_delete_pg_ig_maps} + +Delete initiator group to portal group mappings from an existing iSCSI target node. + +### Parameters + +Name | Optional | Type | Description +--------------------------- | -------- | --------| ----------- +name | Required | string | Target node name (ASCII) +pg_ig_maps | Required | array | Not empty array of Portal to Initiator group mappings objects + +Portal to Initiator group mappings object: + +Name | Optional | Type | Description +--------------------------- | -------- | --------| ----------- +ig_tag | Required | number | Existing initiator group tag +pg_tag | Required | number | Existing portal group tag + +### Example + +Example request: + +~~~ +{ + "params": { + "pg_ig_maps": [ + { + "ig_tag": 1, + "pg_tag": 1 + }, + { + "ig_tag": 2, + "pg_tag": 2 + }, + { + "ig_tag": 3, + "pg_tag": 3 + } + ], + "name": "iqn.2016-06.io.spdk:target3" + }, + "jsonrpc": "2.0", + "method": "delete_pg_ig_maps", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## delete_target_node method {#rpc_delete_target_node} + +Delete a iSCSI target node. + +### Parameters + +Name | Optional | Type | Description +--------------------------- | -------- | --------| ----------- +name | Required | string | Target node name (ASCII) + +### Example + +Example request: + +~~~ +{ + "params": { + "name": "iqn.2016-06.io.spdk:target1" + }, + "jsonrpc": "2.0", + "method": "delete_target_node", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## get_portal_groups method {#rpc_get_portal_groups} + +Show information about all available portal groups. + +### Parameters + +This method has no parameters. + +### Example + +Example request: + +~~~ +request: +{ + "jsonrpc": "2.0", + "method": "get_portal_groups", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": [ + { + "portals": [ + { + "cpumask": "0x2", + "host": "127.0.0.1", + "port": "3260" + } + ], + "tag": 1 + } + ] +} +~~~ + +## add_portal_group method {#rpc_add_portal_group} + +Add a portal group. + +### Parameters + +Name | Optional | Type | Description +--------------------------- | -------- | --------| ----------- +tag | Required | number | Portal group tag +portals | Required | array | Not empty array of portals + +Portal object + +Name | Optional | Type | Description +--------------------------- | -------- | --------| ----------- +host | Required | string | Hostname or IP address +port | Required | string | Port number + +### Example + +Example request: + +~~~ +{ + "params": { + "portals": [ + { + "host": "127.0.0.1", + "port": "3260" + } + ], + "tag": 1 + }, + "jsonrpc": "2.0", + "method": "add_portal_group", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## delete_portal_group method {#rpc_delete_portal_group} + +Delete an existing portal group. + +### Parameters + +Name | Optional | Type | Description +--------------------------- | -------- | --------| ----------- +tag | Required | number | Existing portal group tag + +### Example + +Example request: + +~~~ +{ + "params": { + "tag": 1 + }, + "jsonrpc": "2.0", + "method": "delete_portal_group", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## get_iscsi_connections method {#rpc_get_iscsi_connections} + +Show information about all active connections. + +### Parameters + +This method has no parameters. + +### Results + +Array of objects describing iSCSI connection. + +Name | Type | Description +--------------------------- | --------| ----------- +id | number | Index (used for TTT - Target Transfer Tag) +cid | number | CID (Connection ID) +tsih | number | TSIH (Target Session Identifying Handle) +lcore_id | number | Core number on which the iSCSI connection runs +initiator_addr | string | Initiator address +target_addr | string | Target address +target_node_name | string | Target node name (ASCII) without prefix + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "method": "get_iscsi_connections", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": [ + { + "tsih": 4, + "cid": 0, + "target_node_name": "target1", + "lcore_id": 0, + "initiator_addr": "10.0.0.2", + "target_addr": "10.0.0.1", + "id": 0 + } + ] +} +~~~ + +## target_node_add_lun method {#rpc_target_node_add_lun} + +Add an LUN to an existing iSCSI target node. + +### Parameters + +Name | Optional | Type | Description +--------------------------- | -------- | --------| ----------- +name | Required | string | Target node name (ASCII) +bdev_name | Required | string | bdev name to be added as a LUN +lun_id | Optional | number | LUN ID (default: first free ID) + +### Example + +Example request: + +~~~ +{ + "params": { + "lun_id": 2, + "name": "iqn.2016-06.io.spdk:target1", + "bdev_name": "Malloc0" + }, + "jsonrpc": "2.0", + "method": "target_node_add_lun", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +# NVMe-oF Target {#jsonrpc_components_nvmf_tgt} + +## get_nvmf_subsystems method {#rpc_get_nvmf_subsystems} + +### Parameters + +This method has no parameters. + +### Example + +Example request: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "method": "get_nvmf_subsystems" +} +~~~ + +Example response: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": [ + { + "nqn": "nqn.2014-08.org.nvmexpress.discovery", + "subtype": "Discovery" + "listen_addresses": [], + "hosts": [], + "allow_any_host": true + }, + { + "nqn": "nqn.2016-06.io.spdk:cnode1", + "subtype": "NVMe", + "listen_addresses": [ + { + "trtype": "RDMA", + "adrfam": "IPv4", + "traddr": "192.168.0.123", + "trsvcid": "4420" + } + ], + "hosts": [ + {"nqn": "nqn.2016-06.io.spdk:host1"} + ], + "allow_any_host": false, + "serial_number": "abcdef", + "namespaces": [ + {"nsid": 1, "name": "Malloc2"}, + {"nsid": 2, "name": "Nvme0n1"} + ] + } + ] +} +~~~ + +## nvmf_subsystem_create method {#rpc_nvmf_subsystem_create} + +Construct an NVMe over Fabrics target subsystem. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +nqn | Required | string | Subsystem NQN +serial_number | Optional | string | Serial number of virtual controller +max_namespaces | Optional | number | Maximum number of namespaces that can be attached to the subsystem. Default: 0 (Unlimited) +allow_any_host | Optional | boolean | Allow any host (`true`) or enforce allowed host whitelist (`false`). Default: `false`. + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "method": "nvmf_subsystem_create", + "params": { + "nqn": "nqn.2016-06.io.spdk:cnode1", + "allow_any_host": false, + "serial_number": "abcdef", + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## delete_nvmf_subsystem method {#rpc_delete_nvmf_subsystem} + +Delete an existing NVMe-oF subsystem. + +### Parameters + +Parameter | Optional | Type | Description +---------------------- | -------- | ----------- | ----------- +nqn | Required | string | Subsystem NQN to delete. + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "method": "delete_nvmf_subsystem", + "params": { + "nqn": "nqn.2016-06.io.spdk:cnode1" + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## nvmf_subsystem_add_listener method {#rpc_nvmf_subsystem_add_listener} + +Add a new listen address to an NVMe-oF subsystem. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +nqn | Required | string | Subsystem NQN +listen_address | Required | object | @ref rpc_nvmf_listen_address object + +### listen_address {#rpc_nvmf_listen_address} + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +trtype | Required | string | Transport type ("RDMA") +adrfam | Required | string | Address family ("IPv4", "IPv6", "IB", or "FC") +traddr | Required | string | Transport address +trsvcid | Required | string | Transport service ID + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "method": "nvmf_subsystem_add_listener", + "params": { + "nqn": "nqn.2016-06.io.spdk:cnode1", + "listen_address": { + "trtype": "RDMA", + "adrfam": "IPv4", + "traddr": "192.168.0.123", + "trsvcid: "4420" + } + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## nvmf_subsystem_add_ns method {#rpc_nvmf_subsystem_add_ns} + +Add a namespace to a subsystem. The namespace ID is returned as the result. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +nqn | Required | string | Subsystem NQN +namespace | Required | object | @ref rpc_nvmf_namespace object + +### namespace {#rpc_nvmf_namespace} + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +nsid | Optional | number | Namespace ID between 1 and 4294967294, inclusive. Default: Automatically assign NSID. +bdev_name | Required | string | Name of bdev to expose as a namespace. +nguid | Optional | string | 16-byte namespace globally unique identifier in hexadecimal (e.g. "ABCDEF0123456789ABCDEF0123456789") +eui64 | Optional | string | 8-byte namespace EUI-64 in hexadecimal (e.g. "ABCDEF0123456789") +uuid | Optional | string | RFC 4122 UUID (e.g. "ceccf520-691e-4b46-9546-34af789907c5") + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "method": "nvmf_subsystem_add_ns", + "params": { + "nqn": "nqn.2016-06.io.spdk:cnode1", + "namespace": { + "nsid": 3, + "bdev_name": "Nvme0n1" + } + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": 3 +} +~~~ + +## nvmf_subsystem_remove_ns method {#rpc_nvmf_subsystem_remove_ns} + +Remove a namespace from a subsystem. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +nqn | Required | string | Subsystem NQN +nsid | Required | number | Namespace ID + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "method": "nvmf_subsystem_remove_ns", + "params": { + "nqn": "nqn.2016-06.io.spdk:cnode1", + "nsid": 1 + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## nvmf_subsystem_add_host method {#rpc_nvmf_subsystem_add_host} + +Add a host NQN to the whitelist of allowed hosts. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +nqn | Required | string | Subsystem NQN +host | Required | string | Host NQN to add to the list of allowed host NQNs + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "method": "nvmf_subsystem_add_host", + "params": { + "nqn": "nqn.2016-06.io.spdk:cnode1", + "host": "nqn.2016-06.io.spdk:host1" + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## nvmf_subsystem_remove_host method {#rpc_nvmf_subsystem_remove_host} + +Remove a host NQN from the whitelist of allowed hosts. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +nqn | Required | string | Subsystem NQN +host | Required | string | Host NQN to remove from the list of allowed host NQNs + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "method": "nvmf_subsystem_remove_host", + "params": { + "nqn": "nqn.2016-06.io.spdk:cnode1", + "host": "nqn.2016-06.io.spdk:host1" + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## nvmf_subsystem_allow_any_host method {#rpc_nvmf_subsystem_allow_any_host} + +Configure a subsystem to allow any host to connect or to enforce the host NQN whitelist. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +nqn | Required | string | Subsystem NQN +allow_any_host | Required | boolean | Allow any host (`true`) or enforce allowed host whitelist (`false`). + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "method": "nvmf_subsystem_allow_any_host", + "params": { + "nqn": "nqn.2016-06.io.spdk:cnode1", + "allow_any_host": true + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## set_nvmf_target_options {#rpc_set_nvmf_target_options} + +Set global parameters for the NVMe-oF target. This RPC may only be called before SPDK subsystems +have been initialized. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +max_queue_depth | Optional | number | Maximum number of outstanding I/Os per queue +max_qpairs_per_ctrlr | Optional | number | Maximum number of SQ and CQ per controller +in_capsule_data_size | Optional | number | Maximum number of in-capsule data size +max_io_size | Optional | number | Maximum I/O size (bytes) +max_subsystems | Optional | number | Maximum number of NVMe-oF subsystems +io_unit_size | Optional | number | I/O unit size (bytes) + +### Example + +Example request: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "method": "set_nvmf_target_options", + "params": { + "in_capsule_data_size": 4096, + "io_unit_size": 131072, + "max_qpairs_per_ctrlr": 64, + "max_queue_depth": 128, + "max_io_size": 131072, + "max_subsystems": 1024 + } +} +~~~ + +Example response: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## set_nvmf_target_config {#rpc_set_nvmf_target_config} + +Set global configuration of NVMe-oF target. This RPC may only be called before SPDK subsystems +have been initialized. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +acceptor_poll_rate | Optional | number | Polling interval of the acceptor for incoming connections (microseconds) + +### Example + +Example request: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "method": "set_nvmf_target_config", + "params": { + "acceptor_poll_rate": 10000 + } +} +~~~ + +Example response: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +# Vhost Target {#jsonrpc_components_vhost_tgt} + +The following common preconditions need to be met in all target types. + +Controller name will be used to create UNIX domain socket. This implies that name concatenated with vhost socket +directory path needs to be valid UNIX socket name. + +@ref cpu_mask parameter is used to choose CPU on which pollers will be launched when new initiator is connecting. +It must be a subset of application CPU mask. Default value is CPU mask of the application. + +## set_vhost_controller_coalescing {#rpc_set_vhost_controller_coalescing} + +Controls interrupt coalescing for specific target. Because `delay_base_us` is used to calculate delay in CPU ticks +there is no hardcoded limit for this parameter. Only limitation is that final delay in CPU ticks might not overflow +32 bit unsigned integer (which is more than 1s @ 4GHz CPU). In real scenarios `delay_base_us` should be much lower +than 150us. To disable coalescing set `delay_base_us` to 0. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +ctrlr | Required | string | Controller name +delay_base_us | Required | number | Base (minimum) coalescing time in microseconds +iops_threshold | Required | number | Coalescing activation level greater than 0 in IO per second + +### Example + +Example request: + +~~~ +{ + "params": { + "iops_threshold": 100000, + "ctrlr": "VhostScsi0", + "delay_base_us": 80 + }, + "jsonrpc": "2.0", + "method": "set_vhost_controller_coalescing", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## construct_vhost_scsi_controller {#rpc_construct_vhost_scsi_controller} + +Construct vhost SCSI target. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +ctrlr | Required | string | Controller name +cpumask | Optional | string | @ref cpu_mask for this controller + +### Example + +Example request: + +~~~ +{ + "params": { + "cpumask": "0x2", + "ctrlr": "VhostScsi0" + }, + "jsonrpc": "2.0", + "method": "construct_vhost_scsi_controller", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## add_vhost_scsi_lun {#rpc_add_vhost_scsi_lun} + +In vhost target `ctrlr` create SCSI target with ID `scsi_target_num` and add `bdev_name` as LUN 0. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +ctrlr | Required | string | Controller name +scsi_target_num | Required | number | SCSI target ID between 0 and 7 +bdev_name | Required | string | Name of bdev to expose as a LUN 0 + +### Example + +Example request: + +~~~ +{ + "params": { + "scsi_target_num": 1, + "bdev_name": "Malloc0", + "ctrlr": "VhostScsi0" + }, + "jsonrpc": "2.0", + "method": "add_vhost_scsi_lun", + "id": 1 +} +~~~ + +Example response: + +~~~ +response: +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## remove_vhost_scsi_target {#rpc_remove_vhost_scsi_target} + +Remove SCSI target ID `scsi_target_num` from vhost target `scsi_target_num`. + +This method will fail if initiator is connected, but doesn't support hot-remove (the `VIRTIO_SCSI_F_HOTPLUG` is not negotiated). + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +ctrlr | Required | string | Controller name +scsi_target_num | Required | number | SCSI target ID between 0 and 7 + +### Example + +Example request: + +~~~ +request: +{ + "params": { + "scsi_target_num": 1, + "ctrlr": "VhostScsi0" + }, + "jsonrpc": "2.0", + "method": "remove_vhost_scsi_target", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## construct_vhost_nvme_controller {#rpc_construct_vhost_nvme_controller} + +Construct empty vhost NVMe controller. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +ctrlr | Required | string | Controller name +io_queues | Required | number | Number between 1 and 31 of IO queues for the controller +cpumask | Optional | string | @ref cpu_mask for this controller + + +### Example + +Example request: + +~~~ +{ + "params": { + "cpumask": "0x2", + "io_queues": 4, + "ctrlr": "VhostNvme0" + }, + "jsonrpc": "2.0", + "method": "construct_vhost_nvme_controller", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## add_vhost_nvme_ns {#rpc_add_vhost_nvme_ns} + +Add namespace backed by `bdev_name` + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +ctrlr | Required | string | Controller name +bdev_name | Required | string | Name of bdev to expose as a namespace +cpumask | Optional | string | @ref cpu_mask for this controller + +### Example + +Example request: + +~~~ +{ + "params": { + "bdev_name": "Malloc0", + "ctrlr": "VhostNvme0" + }, + "jsonrpc": "2.0", + "method": "add_vhost_nvme_ns", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## construct_vhost_blk_controller {#rpc_construct_vhost_blk_controller} + +Construct vhost block controller + +If `readonly` is `true` then vhost block target will be created as read only and fail any write requests. +The `VIRTIO_BLK_F_RO` feature flag will be offered to the initiator. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +ctrlr | Required | string | Controller name +bdev_name | Required | string | Name of bdev to expose block device +readonly | Optional | boolean | If true, this target will be read only (default: false) +cpumask | Optional | string | @ref cpu_mask for this controller + + +### Example + +Example request: + +~~~ +{ + "params": { + "dev_name": "Malloc0", + "ctrlr": "VhostBlk0" + }, + "jsonrpc": "2.0", + "method": "construct_vhost_blk_controller", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## get_vhost_controllers {#rpc_get_vhost_controllers} + +Display information about all or specific vhost controller(s). + +### Parameters + +The user may specify no parameters in order to list all controllers, or a controller may be +specified by name. + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Optional | string | Vhost controller name + + +### Response {#rpc_get_vhost_controllers_response} + +Response is an array of objects describing requested controller(s). Common fields are: + +Name | Type | Description +----------------------- | ----------- | ----------- +ctrlr | string | Controller name +cpumask | string | @ref cpu_mask of this controller +delay_base_us | number | Base (minimum) coalescing time in microseconds (0 if disabled) +iops_threshold | number | Coalescing activation level +backend_specific | object | Backend specific informations + +### Vhost block {#rpc_get_vhost_controllers_blk} + +`backend_specific` contains one `block` object of type: + +Name | Type | Description +----------------------- | ----------- | ----------- +bdev | string | Backing bdev name or Null if bdev is hot-removed +readonly | boolean | True if controllers is readonly, false otherwise + +### Vhost SCSI {#rpc_get_vhost_controllers_scsi} + +`backend_specific` contains `scsi` array of following objects: + +Name | Type | Description +----------------------- | ----------- | ----------- +target_name | string | Name of this SCSI target +id | number | Unique SPDK global SCSI target ID +scsi_dev_num | number | SCSI target ID initiator will see when scanning this controller +luns | array | array of objects describing @ref rpc_get_vhost_controllers_scsi_luns + +### Vhost SCSI LUN {#rpc_get_vhost_controllers_scsi_luns} + +Object of type: + +Name | Type | Description +----------------------- | ----------- | ----------- +id | number | SCSI LUN ID +bdev_name | string | Backing bdev name + +### Vhost NVMe {#rpc_get_vhost_controllers_nvme} + +`backend_specific` contains `namespaces` array of following objects: + +Name | Type | Description +----------------------- | ----------- | ----------- +nsid | number | Namespace ID +bdev | string | Backing bdev name + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "method": "get_vhost_controllers", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": [ + { + "cpumask": "0x2", + "backend_specific": { + "block": { + "readonly": false, + "bdev": "Malloc0" + } + }, + "iops_threshold": 60000, + "ctrlr": "VhostBlk0", + "delay_base_us": 100 + }, + { + "cpumask": "0x2", + "backend_specific": { + "scsi": [ + { + "target_name": "Target 2", + "luns": [ + { + "id": 0, + "bdev_name": "Malloc1" + } + ], + "id": 0, + "scsi_dev_num": 2 + }, + { + "target_name": "Target 5", + "luns": [ + { + "id": 0, + "bdev_name": "Malloc2" + } + ], + "id": 1, + "scsi_dev_num": 5 + } + ] + }, + "iops_threshold": 60000, + "ctrlr": "VhostScsi0", + "delay_base_us": 0 + }, + { + "cpumask": "0x2", + "backend_specific": { + "namespaces": [ + { + "bdev": "Malloc3", + "nsid": 1 + }, + { + "bdev": "Malloc4", + "nsid": 2 + } + ] + }, + "iops_threshold": 60000, + "ctrlr": "VhostNvme0", + "delay_base_us": 0 + } + ] +} +~~~ + +## remove_vhost_controller {#rpc_remove_vhost_controller} + +Remove vhost target. + +This call will fail if there is an initiator connected or there is at least one SCSI target configured in case of +vhost SCSI target. In the later case please remove all SCSI targets first using @ref rpc_remove_vhost_scsi_target. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +ctrlr | Required | string | Controller name + +### Example + +Example request: + +~~~ +{ + "params": { + "ctrlr": "VhostNvme0" + }, + "jsonrpc": "2.0", + "method": "remove_vhost_controller", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +# Logical Volume {#jsonrpc_components_lvol} + +Identification of logical volume store and logical volume is explained first. + +A logical volume store has a UUID and a name for its identification. +The UUID is generated on creation and it can be used as a unique identifier. +The name is specified on creation and can be renamed. +Either UUID or name is used to access logical volume store in RPCs. + +A logical volume has a UUID and a name for its identification. +The UUID of the logical volume is generated on creation and it can be unique identifier. +The alias of the logical volume takes the format _lvs_name/lvol_name_ where: +* _lvs_name_ is the name of the logical volume store. +* _lvol_name_ is specified on creation and can be renamed. + +## construct_lvol_store {#rpc_construct_lvol_store} + +Construct a logical volume store. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +bdev_name | Required | string | Bdev on which to construct logical volume store +lvs_name | Required | string | Name of the logical volume store to create +cluster_sz | Optional | number | Cluster size of the logical volume store in bytes + +### Response + +UUID of the created logical volume store is returned. + +### Example + +Example request: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "method": "construct_lvol_store", + "params": { + "lvs_name": "LVS0", + "bdev_name": "Malloc0" + } +} +~~~ + +Example response: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": "a9959197-b5e2-4f2d-8095-251ffb6985a5" +} +~~~ + +## destroy_lvol_store {#rpc_destroy_lvol_store} + +Destroy a logical volume store. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +uuid | Optional | string | UUID of the logical volume store to destroy +lvs_name | Optional | string | Name of the logical volume store to destroy + +Either uuid or lvs_name must be specified, but not both. + +### Example + +Example request: +~~~ +{ + "jsonrpc": "2.0", + "method": "destroy_lvol_store", + "id": 1 + "params": { + "uuid": "a9959197-b5e2-4f2d-8095-251ffb6985a5" + } +} +~~~ + +Example response: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## get_lvol_stores {#rpc_get_lvol_stores} + +Get a list of logical volume stores. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +uuid | Optional | string | UUID of the logical volume store to retrieve information about +lvs_name | Optional | string | Name of the logical volume store to retrieve information about + +Either uuid or lvs_name may be specified, but not both. +If both uuid and lvs_name are omitted, information about all logical volume stores is returned. + +### Example + +Example request: +~~~ +{ + "jsonrpc": "2.0", + "method": "get_lvol_stores", + "id": 1, + "params": { + "lvs_name": "LVS0" + } +} +~~~ + +Example response: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": [ + { + "uuid": "a9959197-b5e2-4f2d-8095-251ffb6985a5", + "base_bdev": "Malloc0", + "free_clusters": 31, + "cluster_size": 4194304, + "total_data_clusters": 31, + "block_size": 4096, + "name": "LVS0" + } + ] +} +~~~ + +## rename_lvol_store {#rpc_rename_lvol_store} + +Rename a logical volume store. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +old_name | Required | string | Existing logical volume store name +new_name | Required | string | New logical volume store name + +### Example + +Example request: +~~~ +{ + "jsonrpc": "2.0", + "method": "rename_lvol_store", + "id": 1, + "params": { + "old_name": "LVS0", + "new_name": "LVS2" + } +} +~~~ + +Example response: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## construct_lvol_bdev {#rpc_construct_lvol_bdev} + +Create a logical volume on a logical volume store. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +lvol_name | Required | string | Name of logical volume to create +size | Required | number | Desired size of logical volume in bytes +thin_provision | Optional | boolean | True to enable thin provisioning +uuid | Optional | string | UUID of logical volume store to create logical volume on +lvs_name | Optional | string | Name of logical volume store to create logical volume on + +Size will be rounded up to a multiple of cluster size. Either uuid or lvs_name must be specified, but not both. +lvol_name will be used in the alias of the created logical volume. + +### Response + +UUID of the created logical volume is returned. + +### Example + +Example request: +~~~ +{ + "jsonrpc": "2.0", + "method": "construct_lvol_bdev", + "id": 1, + "params": { + "lvol_name": "LVOL0", + "size": 1048576, + "lvs_name": "LVS0", + "thin_provision": true + } +} +~~~ + +Example response: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": "1b38702c-7f0c-411e-a962-92c6a5a8a602" +} +~~~ + +## snapshot_lvol_bdev {#rpc_snapshot_lvol_bdev} + +Capture a snapshot of the current state of a logical volume. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +lvol_name | Required | string | UUID or alias of the logical volume to create a snapshot from +snapshot_name | Required | string | Name for the newly created snapshot + +### Response + +UUID of the created logical volume snapshot is returned. + +### Example + +Example request: +~~~ +{ + "jsonrpc": "2.0", + "method": "snapshot_lvol_bdev", + "id": 1, + "params": { + "lvol_name": "1b38702c-7f0c-411e-a962-92c6a5a8a602", + "snapshot_name": "SNAP1" + } +} +~~~ + +Example response: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": "cc8d7fdf-7865-4d1f-9fc6-35da8e368670" +} +~~~ + +## clone_lvol_bdev {#rpc_clone_lvol_bdev} + +Create a logical volume based on a snapshot. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +snapshot_name | Required | string | UUID or alias of the snapshot to clone +clone_name | Required | string | Name for the logical volume to create + +### Response + +UUID of the created logical volume clone is returned. + +### Example + +Example request: +~~~ +{ + "jsonrpc": "2.0" + "method": "clone_lvol_bdev", + "id": 1, + "params": { + "snapshot_name": "cc8d7fdf-7865-4d1f-9fc6-35da8e368670", + "clone_name": "CLONE1" + } +} +~~~ + +Example response: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": "8d87fccc-c278-49f0-9d4c-6237951aca09" +} +~~~ + +## rename_lvol_bdev {#rpc_rename_lvol_bdev} + +Rename a logical volume. New name will rename only the alias of the logical volume. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +old_name | Required | string | UUID or alias of the existing logical volume +new_name | Required | string | New logical volume name + +### Example + +Example request: +~~~ +{ + "jsonrpc": "2.0", + "method": "rename_lvol_bdev", + "id": 1, + "params": { + "old_name": "067df606-6dbc-4143-a499-0d05855cb3b8", + "new_name": "LVOL2" + } +} +~~~ + +Example response: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## resize_lvol_bdev {#rpc_resize_lvol_bdev} + +Resize a logical volume. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Required | string | UUID or alias of the logical volume to resize +size | Required | number | Desired size of the logical volume in bytes + +### Example + +Example request: +~~~ +{ + "jsonrpc": "2.0", + "method": "resize_lvol_bdev", + "id": 1, + "params": { + "name": "51638754-ca16-43a7-9f8f-294a0805ab0a", + "size": 2097152 + } +} +~~~ + +Example response: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## destroy_lvol_bdev {#rpc_destroy_lvol_bdev} + +Destroy a logical volume. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Required | string | UUID or alias of the logical volume to destroy + +### Example + +Example request: +~~~ +{ + "jsonrpc": "2.0", + "method": "destroy_lvol_bdev", + "id": 1, + "params": { + "name": "51638754-ca16-43a7-9f8f-294a0805ab0a" + } +} +~~~ + +Example response: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## inflate_lvol_bdev {#rpc_inflate_lvol_bdev} + +Inflate a logical volume. All unallocated clusters are allocated and copied from the parent or zero filled if not allocated in the parent. Then all dependencies on the parent are removed. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Required | string | UUID or alias of the logical volume to inflate + +### Example + +Example request: +~~~ +{ + "jsonrpc": "2.0", + "method": "inflate_lvol_bdev", + "id": 1, + "params": { + "name": "8d87fccc-c278-49f0-9d4c-6237951aca09" + } +} +~~~ + +Example response: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## decouple_parent_lvol_bdev {#rpc_decouple_parent_lvol_bdev} + +Decouple the parent of a logical volume. For unallocated clusters which is allocated in the parent, they are allocated and copied from the parent, but for unallocated clusters which is thin provisioned in the parent, they are kept thin provisioned. Then all dependencies on the parent are removed. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Required | string | UUID or alias of the logical volume to decouple the parent of it + +### Example + +Example request: +~~~ +{ + "jsonrpc": "2.0", + "method": "decouple_parent_lvol_bdev", + "id": 1. + "params": { + "name": "8d87fccc-c278-49f0-9d4c-6237951aca09" + } +} +~~~ + +Example response: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## send_nvme_cmd {#rpc_send_nvme_cmd} + +Send NVMe command directly to NVMe controller or namespace. Parameters and responses encoded by base64 urlsafe need further processing. + +Notice: send_nvme_cmd requires user to guarentee the correctness of NVMe command itself, and also optional parameters. Illegal command contents or mismatching buffer size may result in unpredictable behavior. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Required | string | Name of the operating NVMe controller +cmd_type | Required | string | Type of nvme cmd. Valid values are: admin, io +data_direction | Required | string | Direction of data transfer. Valid values are: c2h, h2c +cmdbuf | Required | string | NVMe command encoded by base64 urlsafe +data | Optional | string | Data transferring to controller from host, encoded by base64 urlsafe +metadata | Optional | string | Metadata transferring to controller from host, encoded by base64 urlsafe +data_len | Optional | number | Data length required to transfer from controller to host +metadata_len | Optional | number | Metadata length required to transfer from controller to host +timeout_ms | Optional | number | Command execution timeout value, in milliseconds + +### Response + +Name | Type | Description +----------------------- | ----------- | ----------- +cpl | string | NVMe completion queue entry, encoded by base64 urlsafe +data | string | Data transferred from controller to host, encoded by base64 urlsafe +metadata | string | Metadata transferred from controller to host, encoded by base64 urlsafe + +### Example + +Example request: +~~~ +{ + "jsonrpc": "2.0", + "method": "send_nvme_cmd", + "id": 1, + "params": { + "name": "Nvme0", + "cmd_type": "admin" + "data_direction": "c2h", + "cmdbuf": "BgAAAAEAAAAAAAAAAAAAAAAAAAAAAAAAsGUs9P5_AAAAAAAAABAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA==", + "data_len": 60, + } +} +~~~ + +Example response: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": { + "cpl": "AAAAAAAAAAARAAAAWrmwABAA==", + "data": "sIjg6AAAAACwiODoAAAAALCI4OgAAAAAAAYAAREAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" + } + +} +~~~ |