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diff --git a/src/spdk/doc/jsonrpc.md b/src/spdk/doc/jsonrpc.md new file mode 100644 index 000000000..055c3b11a --- /dev/null +++ b/src/spdk/doc/jsonrpc.md @@ -0,0 +1,6743 @@ +# 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_framework_start_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. + +## Adding external RPC methods + +SPDK includes both in-tree modules as well as the ability to use external modules. The in-tree modules include some python +scripts to ease the process of sending RPCs to in-tree modules. External modules can utilize this same framework to add new RPC +methods as follows: + +If PYTHONPATH doesn't include the location of the external RPC python script, it should be updated: + +~~~ +export PYTHONPATH=/home/user/plugin_example/ +~~~ + +In provided location, create python module file (e.g. rpc_plugin.py) with new RPC methods. The file should contain +spdk_rpc_plugin_initialize() method that will be called when the plugin is loaded to define new parsers for provided subparsers +argument that adds new RPC calls (subparsers.add_parser()). The new parsers should use the client.call() method to call RPC +functions registered within the external module using the SPDK_RPC_REGISTER() macro. Example: + +~~~ +from rpc.client import print_json + + +def example_create(client, num_blocks, block_size, name=None, uuid=None): + """Construct an example block device. + + Args: + num_blocks: size of block device in blocks + block_size: block size of device; must be a power of 2 and at least 512 + name: name of block device (optional) + uuid: UUID of block device (optional) + + Returns: + Name of created block device. + """ + params = {'num_blocks': num_blocks, 'block_size': block_size} + if name: + params['name'] = name + if uuid: + params['uuid'] = uuid + return client.call('bdev_example_create', params) + + +def example_delete(client, name): + """Delete example block device. + + Args: + bdev_name: name of bdev to delete + """ + params = {'name': name} + return client.call('bdev_example_delete', params) + + +def spdk_rpc_plugin_initialize(subparsers): + def bdev_example_create(args): + num_blocks = (args.total_size * 1024 * 1024) // args.block_size + print_json(example_create(args.client, + num_blocks=int(num_blocks), + block_size=args.block_size, + name=args.name, + uuid=args.uuid)) + + p = subparsers.add_parser('bdev_example_create', + help='Create an example bdev') + p.add_argument('-b', '--name', help="Name of the bdev") + p.add_argument('-u', '--uuid', help="UUID of the bdev") + p.add_argument( + 'total_size', help='Size of bdev in MB (float > 0)', type=float) + p.add_argument('block_size', help='Block size for this bdev', type=int) + p.set_defaults(func=bdev_example_create) + + def bdev_example_delete(args): + example_delete(args.client, + name=args.name) + + p = subparsers.add_parser('bdev_example_delete', + help='Delete an example disk') + p.add_argument('name', help='example bdev name') + p.set_defaults(func=bdev_example_delete) +~~~ + +Finally, call the rpc.py script with '--plugin' parameter to provide above python module name: + +~~~ +./scripts/rpc.py --plugin rpc_plugin bdev_example_create 10 4096 +~~~ + +# App Framework {#jsonrpc_components_app} + +## spdk_kill_instance {#rpc_spdk_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": "spdk_kill_instance", + "params": { + "sig_name": "SIGINT" + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## framework_monitor_context_switch {#rpc_framework_monitor_context_switch} + +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": "framework_monitor_context_switch", + "params": { + "enabled": false + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": { + "enabled": false + } +} +~~~ + +## framework_start_init {#rpc_framework_start_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": "framework_start_init" +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## framework_wait_init {#rpc_framework_wait_init} + +Do not return until all subsystems have been initialized and the RPC system state is running. +If the application is already running, this call will return immediately. This RPC can be called at any time. + +### Parameters + +This method has no parameters. + +### Response + +Returns True when subsystems have been initialized. + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "method": "framework_wait_init" +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## rpc_get_methods {#rpc_rpc_get_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": "rpc_get_methods" +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": [ + "framework_start_init", + "rpc_get_methods", + "scsi_get_devices", + "net_get_interfaces", + "delete_ip_address", + "net_interface_add_ip_address", + "nbd_get_disks", + "nbd_stop_disk", + "nbd_start_disk", + "log_get_flags", + "log_clear_flag", + "log_set_flag", + "log_get_level", + "log_set_level", + "log_get_print_level", + "log_set_print_level", + "iscsi_get_options", + "iscsi_target_node_add_lun", + "iscsi_get_connections", + "iscsi_delete_portal_group", + "iscsi_create_portal_group", + "iscsi_get_portal_groups", + "iscsi_delete_target_node", + "iscsi_target_node_remove_pg_ig_maps", + "iscsi_target_node_add_pg_ig_maps", + "iscsi_create_target_node", + "iscsi_get_target_nodes", + "iscsi_delete_initiator_group", + "iscsi_initiator_group_remove_initiators", + "iscsi_initiator_group_add_initiators", + "iscsi_create_initiator_group", + "iscsi_get_initiator_groups", + "iscsi_set_options", + "bdev_set_options", + "bdev_set_qos_limit", + "bdev_get_bdevs", + "bdev_get_iostat", + "framework_get_config", + "framework_get_subsystems", + "framework_monitor_context_switch", + "spdk_kill_instance", + "ioat_scan_accel_engine", + "idxd_scan_accel_engine", + "bdev_virtio_attach_controller", + "bdev_virtio_scsi_get_devices", + "bdev_virtio_detach_controller", + "bdev_aio_delete", + "bdev_aio_create", + "bdev_split_delete", + "bdev_split_create", + "bdev_error_inject_error", + "bdev_error_delete", + "bdev_error_create", + "bdev_passthru_create", + "bdev_passthru_delete" + "bdev_nvme_apply_firmware", + "bdev_nvme_detach_controller", + "bdev_nvme_attach_controller", + "bdev_null_create", + "bdev_malloc_delete", + "bdev_malloc_create", + "bdev_ftl_delete", + "bdev_ftl_create", + "bdev_lvol_get_lvstores", + "bdev_lvol_delete", + "bdev_lvol_resize", + "bdev_lvol_set_read_only", + "bdev_lvol_decouple_parent", + "bdev_lvol_inflate", + "bdev_lvol_rename", + "bdev_lvol_clone", + "bdev_lvol_snapshot", + "bdev_lvol_create", + "bdev_lvol_delete_lvstore", + "bdev_lvol_rename_lvstore", + "bdev_lvol_create_lvstore" + ] +} +~~~ + +## framework_get_subsystems {#rpc_framework_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": "framework_get_subsystems" +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": [ + { + "subsystem": "accel", + "depends_on": [] + }, + { + "subsystem": "interface", + "depends_on": [] + }, + { + "subsystem": "net_framework", + "depends_on": [ + "interface" + ] + }, + { + "subsystem": "bdev", + "depends_on": [ + "accel" + ] + }, + { + "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" + ] + } + ] +} +~~~ + +## framework_get_config {#rpc_framework_get_config} + +Get current configuration of the specified SPDK framework + +### 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 framework_get_config method and empty array is returned if it is empty. + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "method": "framework_get_config", + "params": { + "name": "bdev" + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": [ + { + "params": { + "base_bdev": "Malloc2", + "split_size_mb": 0, + "split_count": 2 + }, + "method": "bdev_split_create" + }, + { + "params": { + "trtype": "PCIe", + "name": "Nvme1", + "traddr": "0000:01:00.0" + }, + "method": "bdev_nvme_attach_controller" + }, + { + "params": { + "trtype": "PCIe", + "name": "Nvme2", + "traddr": "0000:03:00.0" + }, + "method": "bdev_nvme_attach_controller" + }, + { + "params": { + "block_size": 512, + "num_blocks": 131072, + "name": "Malloc0", + "uuid": "913fc008-79a7-447f-b2c4-c73543638c31" + }, + "method": "bdev_malloc_create" + }, + { + "params": { + "block_size": 512, + "num_blocks": 131072, + "name": "Malloc1", + "uuid": "dd5b8f6e-b67a-4506-b606-7fff5a859920" + }, + "method": "bdev_malloc_create" + } + ] +} +~~~ + +## framework_get_reactors {#rpc_framework_get_reactors} + +Retrieve an array of all reactors. + +### Parameters + +This method has no parameters. + +### Response + +The response is an array of all reactors. + +### Example + +Example request: +~~~ +{ + "jsonrpc": "2.0", + "method": "framework_get_reactors", + "id": 1 +} +~~~ + +Example response: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": { + "tick_rate": 2400000000, + "reactors": [ + { + "lcore": 0, + "busy": 41289723495, + "idle": 3624832946, + "lw_threads": [ + { + "name": "app_thread", + "id", 1, + "cpumask": "1", + "elapsed": 44910853363 + } + ] + } + ] + } +} +~~~ + +## thread_get_stats {#rpc_thread_get_stats} + +Retrieve current statistics of all the threads. + +### Parameters + +This method has no parameters. + +### Response + +The response is an array of objects containing threads statistics. + +### Example + +Example request: +~~~ +{ + "jsonrpc": "2.0", + "method": "thread_get_stats", + "id": 1 +} +~~~ + +Example response: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": { + "tick_rate": 2400000000, + "threads": [ + { + "name": "app_thread", + "id": 1, + "cpumask": "1", + "busy": 139223208, + "idle": 8641080608, + "active_pollers_count": 1, + "timed_pollers_count": 2, + "paused_pollers_count": 0 + } + ] + } +} +~~~ + +## thread_set_cpumask {#rpc_thread_set_cpumask} + +Set the cpumask of the thread to the specified value. The thread may be migrated +to one of the specified CPUs. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +id | Required | string | Thread ID +cpumask | Required | string | Cpumask for this thread + +### Response + +Completion status of the operation is returned as a boolean. + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "method": "thread_set_cpumask", + "id": 1, + "params": { + "id": "1", + "cpumask": "1" + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## thread_get_pollers {#rpc_thread_get_pollers} + +Retrieve current pollers of all the threads. + +### Parameters + +This method has no parameters. + +### Response + +The response is an array of objects containing pollers of all the threads. + +### Example + +Example request: +~~~ +{ + "jsonrpc": "2.0", + "method": "thread_get_pollers", + "id": 1 +} +~~~ + +Example response: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": { + "tick_rate": 2500000000, + "threads": [ + { + "name": "app_thread", + "id": 1, + "active_pollers": [], + "timed_pollers": [ + { + "name": "spdk_rpc_subsystem_poll", + "state": "waiting", + "run_count": 12345, + "busy_count": 10000, + "period_ticks": 10000000 + } + ], + "paused_pollers": [] + } + ] + } +} +~~~ + +## thread_get_io_channels {#rpc_thread_get_io_channels} + +Retrieve current IO channels of all the threads. + +### Parameters + +This method has no parameters. + +### Response + +The response is an array of objects containing IO channels of all the threads. + +### Example + +Example request: +~~~ +{ + "jsonrpc": "2.0", + "method": "thread_get_io_channels", + "id": 1 +} +~~~ + +Example response: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": { + "tick_rate": 2500000000, + "threads": [ + { + "name": "app_thread", + "io_channels": [ + { + "name": "nvmf_tgt", + "ref": 1 + } + ] + } + ] + } +} +~~~ +# Block Device Abstraction Layer {#jsonrpc_components_bdev} + +## bdev_set_options {#rpc_bdev_set_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 +bdev_auto_examine | Optional | boolean | If set to false, the bdev layer will not examine every disks automatically + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "method": "bdev_set_options", + "params": { + "bdev_io_pool_size": 65536, + "bdev_io_cache_size": 256 + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## bdev_get_bdevs {#rpc_bdev_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": "bdev_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, + "zoned": 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": {} + } + ] +} +~~~ + +## bdev_get_iostat {#rpc_bdev_get_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": "bdev_get_iostat", + "params": { + "name": "Nvme0n1" + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": { + "tick_rate": 2200000000, + "bdevs" : [ + { + "name": "Nvme0n1", + "bytes_read": 36864, + "num_read_ops": 2, + "bytes_written": 0, + "num_write_ops": 0, + "bytes_unmapped": 0, + "num_unmap_ops": 0, + "read_latency_ticks": 178904, + "write_latency_ticks": 0, + "unmap_latency_ticks": 0, + "queue_depth_polling_period": 2, + "queue_depth": 0, + "io_time": 0, + "weighted_io_time": 0 + } + ] + } +} +~~~ + +## bdev_enable_histogram {#rpc_bdev_enable_histogram} + +Control whether collecting data for histogram is enabled for specified bdev. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Required | string | Block device name +enable | Required | boolean | Enable or disable histogram on specified device + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "method": "bdev_enable_histogram", + "params": { + "name": "Nvme0n1" + "enable": true + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## bdev_get_histogram {#rpc_bdev_get_histogram} + +Get latency histogram for specified bdev. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Required | string | Block device name + +### Result + +Name | Description +------------------------| ----------- +histogram | Base64 encoded histogram +bucket_shift | Granularity of the histogram buckets +tsc_rate | Ticks per second + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "method": "bdev_get_histogram", + "params": { + "name": "Nvme0n1" + } +} +~~~ + +Example response: +Note that histogram field is trimmed, actual encoded histogram length is ~80kb. + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": { + "histogram": "AAAAAAAAAAAAAA...AAAAAAAAA==", + "tsc_rate": 2300000000, + "bucket_shift": 7 + } +} +~~~ + +## bdev_set_qos_limit {#rpc_bdev_set_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. +r_mbytes_per_sec | Optional | number | Number of Read megabytes per second to allow. 0 means unlimited. +w_mbytes_per_sec | Optional | number | Number of Write megabytes per second to allow. 0 means unlimited. + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "method": "bdev_set_qos_limit", + "params": { + "name": "Malloc0" + "rw_ios_per_sec": 20000 + "rw_mbytes_per_sec": 100 + "r_mbytes_per_sec": 50 + "w_mbytes_per_sec": 50 + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## bdev_ocf_create {#rpc_bdev_ocf_create} + +Construct new OCF bdev. +Command accepts cache mode that is going to be used. +Currently, we support Write-Through, Pass-Through and Write-Back OCF cache modes. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Required | string | Bdev name to use +mode | Required | string | OCF cache mode ('wb' or 'wt' or 'pt') +cache_bdev_name | Required | string | Name of underlying cache bdev +core_bdev_name | Required | string | Name of underlying core bdev + +### Result + +Name of newly created bdev. + +### Example + +Example request: + +~~~ +{ + "params": { + "name": "ocf0", + "mode": "wt", + "cache_bdev_name": "Nvme0n1" + "core_bdev_name": "aio0" + }, + "jsonrpc": "2.0", + "method": "bdev_ocf_create", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": "ocf0" +} +~~~ + +## bdev_ocf_delete {#rpc_bdev_ocf_delete} + +Delete the OCF bdev + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Required | string | Bdev name + +### Example + +Example request: + +~~~ +{ + "params": { + "name": "ocf0" + }, + "jsonrpc": "2.0", + "method": "bdev_ocf_delete", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## bdev_ocf_get_stats {#rpc_bdev_ocf_get_stats} + +Get statistics of chosen OCF block device. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Required | string | Block device name + +### Response + +Statistics as json object. + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "method": "bdev_ocf_get_stats", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": [ + "usage": { + "clean": { + "count": 76033, + "units": "4KiB blocks", + "percentage": "100.0" + }, + "free": { + "count": 767, + "units": "4KiB blocks", + "percentage": "0.9" + }, + "occupancy": { + "count": 76033, + "units": "4KiB blocks", + "percentage": "99.0" + }, + "dirty": { + "count": 0, + "units": "4KiB blocks", + "percentage": "0.0" + } + }, + "requests": { + "rd_total": { + "count": 2, + "units": "Requests", + "percentage": "0.0" + }, + "wr_full_misses": { + "count": 76280, + "units": "Requests", + "percentage": "35.6" + }, + "rd_full_misses": { + "count": 1, + "units": "Requests", + "percentage": "0.0" + }, + "rd_partial_misses": { + "count": 0, + "units": "Requests", + "percentage": "0.0" + }, + "wr_total": { + "count": 212416, + "units": "Requests", + "percentage": "99.2" + }, + "wr_pt": { + "count": 1535, + "units": "Requests", + "percentage": "0.7" + }, + "wr_partial_misses": { + "count": 0, + "units": "Requests", + "percentage": "0.0" + }, + "serviced": { + "count": 212418, + "units": "Requests", + "percentage": "99.2" + }, + "rd_pt": { + "count": 0, + "units": "Requests", + "percentage": "0.0" + }, + "total": { + "count": 213953, + "units": "Requests", + "percentage": "100.0" + }, + "rd_hits": { + "count": 1, + "units": "Requests", + "percentage": "0.0" + }, + "wr_hits": { + "count": 136136, + "units": "Requests", + "percentage": "63.6" + } + }, + "errors": { + "total": { + "count": 0, + "units": "Requests", + "percentage": "0.0" + }, + "cache_obj_total": { + "count": 0, + "units": "Requests", + "percentage": "0.0" + }, + "core_obj_total": { + "count": 0, + "units": "Requests", + "percentage": "0.0" + }, + "cache_obj_rd": { + "count": 0, + "units": "Requests", + "percentage": "0.0" + }, + "core_obj_wr": { + "count": 0, + "units": "Requests", + "percentage": "0.0" + }, + "core_obj_rd": { + "count": 0, + "units": "Requests", + "percentage": "0.0" + }, + "cache_obj_wr": { + "count": 0, + "units": "Requests", + "percentage": "0.0" + } + }, + "blocks": { + "volume_rd": { + "count": 9, + "units": "4KiB blocks", + "percentage": "0.0" + }, + "volume_wr": { + "count": 213951, + "units": "4KiB blocks", + "percentage": "99.9" + }, + "cache_obj_total": { + "count": 212425, + "units": "4KiB blocks", + "percentage": "100.0" + }, + "core_obj_total": { + "count": 213959, + "units": "4KiB blocks", + "percentage": "100.0" + }, + "cache_obj_rd": { + "count": 1, + "units": "4KiB blocks", + "percentage": "0.0" + }, + "core_obj_wr": { + "count": 213951, + "units": "4KiB blocks", + "percentage": "99.9" + }, + "volume_total": { + "count": 213960, + "units": "4KiB blocks", + "percentage": "100.0" + }, + "core_obj_rd": { + "count": 8, + "units": "4KiB blocks", + "percentage": "0.0" + }, + "cache_obj_wr": { + "count": 212424, + "units": "4KiB blocks", + "percentage": "99.9" + } + ] +} +~~~ + +## bdev_ocf_get_bdevs {#rpc_bdev_ocf_get_bdevs} + +Get list of OCF devices including unregistered ones. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Optional | string | Name of OCF vbdev or name of cache device or name of core device + +### Response + +Array of OCF devices with their current status, along with core and cache bdevs. + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "method": "bdev_ocf_get_bdevs", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": [ + { + "name": "PartCache", + "started": false, + "cache": { + "name": "Malloc0", + "attached": true + }, + "core": { + "name": "Malloc1", + "attached": false + } + } + ] +} +~~~ + +## bdev_malloc_create {#rpc_bdev_malloc_create} + +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": "bdev_malloc_create", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": "Malloc0" +} +~~~ + +## bdev_malloc_delete {#rpc_bdev_malloc_delete} + +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": "bdev_malloc_delete", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## bdev_null_create {#rpc_bdev_null_create} + +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 +md_size | Optional | number | Metadata size in bytes +dif_type | Optional | number | Protection information type (0, 1, 2 or 3). Default: 0 - no protection. +dif_is_head_of_md | Optional | boolean | Protection information is in the first 8 bytes of MD. Default: in the last 8 bytes. + +### Result + +Name of newly created bdev. + +### Example + +Example request: + +~~~ +{ + "params": { + "block_size": 4104, + "num_blocks": 16384, + "name": "Null0", + "uuid": "2b6601ba-eada-44fb-9a83-a20eb9eb9e90", + "md_size": 8, + "dif_type": 1, + "dif_is_head_of_md": true + }, + "jsonrpc": "2.0", + "method": "bdev_null_create", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": "Null0" +} +~~~ + +## bdev_null_delete {#rpc_bdev_null_delete} + +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": "bdev_null_delete", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## bdev_aio_create {#rpc_bdev_aio_create} + +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": "bdev_aio_create", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": "Aio0" +} +~~~ + +## bdev_aio_delete {#rpc_bdev_aio_delete} + +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": "bdev_aio_delete", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## bdev_nvme_set_options {#rpc_bdev_nvme_set_options} + +Set global parameters for all bdev NVMe. This RPC may only be called before SPDK subsystems have been initialized or any bdev NVMe has been created. + +### 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 +arbitration_burst | Optional | number | The value is expressed as a power of two, a value of 111b indicates no limit +low_priority_weight | Optional | number | The maximum number of commands that the controller may launch at one time from a low priority queue +medium_priority_weight | Optional | number | The maximum number of commands that the controller may launch at one time from a medium priority queue +high_priority_weight | Optional | number | The maximum number of commands that the controller may launch at one time from a high priority queue +nvme_adminq_poll_period_us | Optional | number | How often the admin queue is polled for asynchronous events in microseconds +nvme_ioq_poll_period_us | Optional | number | How often I/O queues are polled for completions, in microseconds. Default: 0 (as fast as possible). +io_queue_requests | Optional | number | The number of requests allocated for each NVMe I/O queue. Default: 512. +delay_cmd_submit | Optional | boolean | Enable delaying NVMe command submission to allow batching of multiple commands. Default: `true`. + +### Example + +Example request: + +~~~ +request: +{ + "params": { + "retry_count": 5, + "arbitration_burst": 3, + "low_priority_weight": 8, + "medium_priority_weight":8, + "high_priority_weight": 8, + "nvme_adminq_poll_period_us": 2000, + "timeout_us": 10000000, + "action_on_timeout": "reset", + "io_queue_requests" : 2048, + "delay_cmd_submit": true + }, + "jsonrpc": "2.0", + "method": "bdev_nvme_set_options", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## bdev_nvme_set_hotplug {#rpc_bdev_nvme_set_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": "bdev_nvme_set_hotplug", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## bdev_nvme_attach_controller {#rpc_bdev_nvme_attach_controller} + +Construct @ref bdev_config_nvme + +### Result + +Array of names of newly created bdevs. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Required | string | Name of the NVMe controller, prefix for each 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 +hostaddr | Optional | string | NVMe-oF host address: ip address +hostsvcid | Optional | string | NVMe-oF host trsvcid: port number +prchk_reftag | Optional | bool | Enable checking of PI reference tag for I/O processing +prchk_guard | Optional | bool | Enable checking of PI guard for I/O processing + +### Example + +Example request: + +~~~ +{ + "params": { + "trtype": "pcie", + "name": "Nvme0", + "traddr": "0000:0a:00.0" + }, + "jsonrpc": "2.0", + "method": "bdev_nvme_attach_controller", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": [ + "Nvme0n1" + ] +} +~~~ + +## bdev_nvme_get_controllers {#rpc_bdev_nvme_get_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": "bdev_nvme_get_controllers", + "params": { + "name": "Nvme0" + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": [ + { + "name": "Nvme0", + "trid": { + "trtype": "PCIe", + "traddr": "0000:05:00.0" + } + } + ] +} +~~~ + +## bdev_nvme_detach_controller {#rpc_bdev_nvme_detach_controller} + +Detach NVMe controller and delete any associated bdevs. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Required | string | Controller name + +### Example + +Example requests: + +~~~ +{ + "params": { + "name": "Nvme0" + }, + "jsonrpc": "2.0", + "method": "bdev_nvme_detach_controller", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## bdev_nvme_cuse_register {#rpc_bdev_nvme_cuse_register} + +Register CUSE device on NVMe controller. +This feature is considered as experimental. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Required | string | Name of the NVMe controller +dev_path | Required | string | Path to the CUSE controller device, e.g. spdk/nvme0 + +### Example + +Example request: + +~~~ +{ + "params": { + "dev_path": "spdk/nvme0", + "name": "Nvme0" + }, + "jsonrpc": "2.0", + "method": "bdev_nvme_cuse_register", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## bdev_nvme_cuse_unregister {#rpc_bdev_nvme_cuse_unregister} + +Unregister CUSE device on NVMe controller. +This feature is considered as experimental. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Required | string | Name of the NVMe controller + +### Example + +Example request: + +~~~ +{ + "params": { + "name": "Nvme0" + }, + "jsonrpc": "2.0", + "method": "bdev_nvme_cuse_unregister", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## bdev_rbd_create {#rpc_bdev_rbd_create} + +Create @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 +user_id | Optional | string | Ceph ID (i.e. admin, not client.admin) +pool_name | Required | string | Pool name +rbd_name | Required | string | Image name +block_size | Required | number | Block size +config | Optional | string map | Explicit librados configuration + +If no config is specified, Ceph configuration files must exist with +all relevant settings for accessing the pool. If a config map is +passed, the configuration files are ignored and instead all key/value +pairs are passed to rados_conf_set to configure cluster access. In +practice, "mon_host" (= list of monitor address+port) and "key" (= the +secret key stored in Ceph keyrings) are enough. + +When accessing the image as some user other than "admin" (the +default), the "user_id" has to be set. + +### Result + +Name of newly created bdev. + +### Example + +Example request with `key` from `/etc/ceph/ceph.client.admin.keyring`: + +~~~ +{ + "params": { + "pool_name": "rbd", + "rbd_name": "foo", + "config": { + "mon_host": "192.168.7.1:6789,192.168.7.2:6789", + "key": "AQDwf8db7zR1GRAA5k7NKXjS5S5V4mntwUDnGQ==", + } + "block_size": 4096 + }, + "jsonrpc": "2.0", + "method": "bdev_rbd_create", + "id": 1 +} +~~~ + +Example response: + +~~~ +response: +{ + "jsonrpc": "2.0", + "id": 1, + "result": "Ceph0" +} +~~~ + +## bdev_rbd_delete {#rpc_bdev_rbd_delete} + +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": "bdev_rbd_delete", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## bdev_rbd_resize {#rpc_bdev_rbd_resize} + +Resize @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 resized or `false` otherwise. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Required | string | Bdev name +new_size | Required | int | New bdev size for resize operation in MiB + +### Example + +Example request: + +~~~ +{ + "params": { + "name": "Rbd0" + "new_size": "4096" + }, + "jsonrpc": "2.0", + "method": "bdev_rbd_resize", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## bdev_delay_create {#rpc_bdev_delay_create} + +Create delay bdev. This bdev type redirects all IO to it's base bdev and inserts a delay on the completion +path to create an artificial drive latency. All latency values supplied to this bdev should be in microseconds. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Required | string | Bdev name +base_bdev_name | Required | string | Base bdev name +avg_read_latency | Required | number | average read latency (us) +p99_read_latency | Required | number | p99 read latency (us) +avg_write_latency | Required | number | average write latency (us) +p99_write_latency | Required | number | p99 write latency (us) + +### Result + +Name of newly created bdev. + +### Example + +Example request: + +~~~ +{ + "params": { + "base_bdev_name": "Null0", + "name": "Delay0", + "avg_read_latency": "15", + "p99_read_latency": "50", + "avg_write_latency": "40", + "p99_write_latency": "110", + }, + "jsonrpc": "2.0", + "method": "bdev_delay_create", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": "Delay0" +} +~~~ + +## bdev_delay_delete {#rpc_bdev_delay_delete} + +Delete delay bdev. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Required | string | Bdev name + +### Example + +Example request: + +~~~ +{ + "params": { + "name": "Delay0" + }, + "jsonrpc": "2.0", + "method": "bdev_delay_delete", + "id": 1 +} + +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## bdev_delay_update_latency {#rpc_bdev_delay_update_latency} + +Update a target latency value associated with a given delay bdev. Any currently +outstanding I/O will be completed with the old latency. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +delay_bdev_name | Required | string | Name of the delay bdev +latency_type | Required | string | One of: avg_read, avg_write, p99_read, p99_write +latency_us | Required | number | The new latency value in microseconds + +### Result + +Name of newly created bdev. + +### Example + +Example request: + +~~~ +{ + "params": { + "delay_bdev_name": "Delay0", + "latency_type": "avg_read", + "latency_us": "100", + }, + "jsonrpc": "2.0", + "method": "bdev_delay_update_latency", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "result": "true" +} +~~~ + +## bdev_error_create {#rpc_bdev_error_create} + +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": "bdev_error_create", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## bdev_error_delete {#rpc_bdev_error_delete} + +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": "bdev_error_delete", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## bdev_iscsi_create {#rpc_bdev_iscsi_create} + +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": "bdev_iscsi_create", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": "iSCSI0" +} +~~~ + +## bdev_iscsi_delete {#rpc_bdev_iscsi_delete} + +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": "bdev_iscsi_delete", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## bdev_ftl_create {#rpc_bdev_ftl_create} + +Create FTL bdev. + +This RPC is subject to change. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Required | string | Bdev name +trtype | Required | string | Transport type +traddr | Required | string | NVMe target address +punits | Required | string | Parallel unit range in the form of start-end e.g 4-8 +uuid | Optional | string | UUID of restored bdev (not applicable when creating new instance) +cache | Optional | string | Name of the bdev to be used as a write buffer cache + +### Result + +Name of newly created bdev. + +### Example + +Example request: + +~~~ +{ + "params": { + "name": "nvme0" + "trtype" "pcie" + "traddr": "0000:00:04.0" + "punits": "0-3" + "uuid": "4a7481ce-786f-41a0-9b86-8f7465c8f4d3" + }, + "jsonrpc": "2.0", + "method": "bdev_ftl_create", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": { + "name" : "nvme0" + "uuid" : "4a7481ce-786f-41a0-9b86-8f7465c8f4d3" + } +} +~~~ + +## bdev_ftl_delete {#rpc_bdev_ftl_delete} + +Delete FTL bdev. + +This RPC is subject to change. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Required | string | Bdev name + +### Example + +Example request: + +~~~ +{ + "params": { + "name": "nvme0" + }, + "jsonrpc": "2.0", + "method": "bdev_ftl_delete", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## bdev_pmem_create_pool {#rpc_bdev_pmem_create_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": "bdev_pmem_create_pool", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## bdev_pmem_get_pool_info {#rpc_bdev_pmem_get_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": "bdev_pmem_get_pool_info", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": [ + { + "block_size": 512, + "num_blocks": 129728 + } + ] +} +~~~ + +## bdev_pmem_delete_pool {#rpc_bdev_pmem_delete_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": "bdev_pmem_delete_pool", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## bdev_pmem_create {#rpc_bdev_pmem_create} + +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": "bdev_pmem_create", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": "Pmem0" +} +~~~ + +## bdev_pmem_delete {#rpc_bdev_pmem_delete} + +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": "bdev_pmem_delete", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## bdev_passthru_create {#rpc_bdev_passthru_create} + +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 +----------------------- | -------- | ----------- | ----------- +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", + "name": "Passsthru0" + }, + "jsonrpc": "2.0", + "method": "bdev_passthru_create", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": "Passsthru0" +} +~~~ + +## bdev_passthru_delete {#rpc_bdev_passthru_delete} + +Delete passthru bdev. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Required | string | Bdev name + +### Example + +Example request: + +~~~ +{ + "params": { + "name": "Passsthru0" + }, + "jsonrpc": "2.0", + "method": "bdev_passthru_delete", + "id": 1 +} + +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## bdev_virtio_attach_controller {#rpc_bdev_virtio_attach_controller} + +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": "bdev_virtio_attach_controller", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": ["VirtioScsi0t2", "VirtioScsi0t4"] +} +~~~ + +## bdev_virtio_scsi_get_devices {#rpc_bdev_virtio_scsi_get_devices} + +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": "bdev_virtio_scsi_get_devices", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": [ + { + "name": "VirtioScsi0", + "virtio": { + "vq_size": 128, + "vq_count": 4, + "type": "user", + "socket": "/tmp/VhostScsi0" + } + } + ] +} +~~~ + +## bdev_virtio_detach_controller {#rpc_bdev_virtio_detach_controller} + +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": "bdev_virtio_detach_controller", + "id": 1 +} + +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +# iSCSI Target {#jsonrpc_components_iscsi_tgt} + +## iscsi_set_options method {#rpc_iscsi_set_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`) + +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": "iscsi_set_options", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## iscsi_get_options method {#rpc_iscsi_get_options} + +Show global parameters of iSCSI targets. + +### Parameters + +This method has no parameters. + +### Example + +Example request: + +~~~ +request: +{ + "jsonrpc": "2.0", + "method": "iscsi_get_options", + "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", + "disable_chap": true, + "default_time2wait": 2, + "require_chap": false + } +} +~~~ +## iscsi_set_discovery_auth method {#rpc_iscsi_set_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": "iscsi_set_discovery_auth", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## iscsi_create_auth_group method {#rpc_iscsi_create_auth_group} + +Create 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_iscsi_create_auth_group_secret objects + +### secret {#rpc_iscsi_create_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": "iscsi_create_auth_group", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## iscsi_delete_auth_group method {#rpc_iscsi_delete_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": "iscsi_delete_auth_group", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## iscsi_get_auth_groups {#rpc_iscsi_get_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_iscsi_create_auth_group_secret objects + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "method": "iscsi_get_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 + } + ] +} +~~~ + +## iscsi_auth_group_add_secret {#rpc_iscsi_auth_group_add_secret} + +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": "iscsi_auth_group_add_secret", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## iscsi_auth_group_remove_secret {#rpc_iscsi_auth_group_remove_secret} + +Remove 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": "iscsi_auth_group_remove_secret", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## iscsi_get_initiator_groups method {#rpc_iscsi_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": "iscsi_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" + ] + } + ] +} +~~~ + +## iscsi_create_initiator_group method {#rpc_iscsi_create_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": "iscsi_create_initiator_group", + "id": 1 +} +~~~ + +Example response: + +~~~ +response: +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## iscsi_delete_initiator_group method {#rpc_iscsi_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": "iscsi_delete_initiator_group", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## iscsi_initiator_group_add_initiators method {#rpc_iscsi_initiator_group_add_initiators} + +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": "iscsi_initiator_group_add_initiators", + "id": 1 +} +~~~ + +Example response: + +~~~ +response: +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## iscsi_get_target_nodes method {#rpc_iscsi_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": "iscsi_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 + } + ] +} +~~~ + +## iscsi_create_target_node method {#rpc_iscsi_create_target_node} + +Add an 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": "iscsi_create_target_node", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## iscsi_target_node_set_auth method {#rpc_iscsi_target_node_set_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": "iscsi_target_node_set_auth", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## iscsi_target_node_add_pg_ig_maps method {#rpc_iscsi_target_node_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": "iscsi_target_node_add_pg_ig_maps", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## iscsi_target_node_remove_pg_ig_maps method {#rpc_iscsi_target_node_remove_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": "iscsi_target_node_remove_pg_ig_maps", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## iscsi_delete_target_node method {#rpc_iscsi_delete_target_node} + +Delete an 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": "iscsi_delete_target_node", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## iscsi_get_portal_groups method {#rpc_iscsi_get_portal_groups} + +Show information about all available portal groups. + +### Parameters + +This method has no parameters. + +### Example + +Example request: + +~~~ +request: +{ + "jsonrpc": "2.0", + "method": "iscsi_get_portal_groups", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": [ + { + "portals": [ + { + "host": "127.0.0.1", + "port": "3260" + } + ], + "tag": 1 + } + ] +} +~~~ + +## iscsi_create_portal_group method {#rpc_iscsi_create_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": "iscsi_create_portal_group", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## iscsi_delete_portal_group method {#rpc_iscsi_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": "iscsi_delete_portal_group", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +### iscsi_portal_group_set_auth method {#rpc_iscsi_portal_group_set_auth} + +Set CHAP authentication for discovery sessions specific for the existing iSCSI portal group. +This RPC overwrites the setting by the global parameters for the iSCSI portal group. + +### 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": { + "tag": 1, + "chap_group": 1, + "require_chap": true, + "mutual_chap": true + }, + "jsonrpc": "2.0", + "method": "iscsi_portal_group_set_auth", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## iscsi_get_connections method {#rpc_iscsi_get_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": "iscsi_get_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 + } + ] +} +~~~ + +## iscsi_target_node_add_lun method {#rpc_iscsi_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": "iscsi_target_node_add_lun", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +# NVMe-oF Target {#jsonrpc_components_nvmf_tgt} + +## nvmf_create_transport method {#rpc_nvmf_create_transport} + +Initialize an NVMe-oF transport with the given options. + +### Parameters + +Name | Optional | Type | Description +--------------------------- | -------- | --------| ----------- +trtype | Required | string | Transport type (ex. RDMA) +tgt_name | Optional | string | Parent NVMe-oF target name. +max_queue_depth | Optional | number | Max number of outstanding I/O per queue +max_qpairs_per_ctrlr | Optional | number | Max number of SQ and CQ per controller (deprecated, use max_io_qpairs_per_ctrlr) +max_io_qpairs_per_ctrlr | Optional | number | Max number of IO qpairs per controller +in_capsule_data_size | Optional | number | Max number of in-capsule data size +max_io_size | Optional | number | Max I/O size (bytes) +io_unit_size | Optional | number | I/O unit size (bytes) +max_aq_depth | Optional | number | Max number of admin cmds per AQ +num_shared_buffers | Optional | number | The number of pooled data buffers available to the transport +buf_cache_size | Optional | number | The number of shared buffers to reserve for each poll group +max_srq_depth | Optional | number | The number of elements in a per-thread shared receive queue (RDMA only) +no_srq | Optional | boolean | Disable shared receive queue even for devices that support it. (RDMA only) +c2h_success | Optional | boolean | Disable C2H success optimization (TCP only) +dif_insert_or_strip | Optional | boolean | Enable DIF insert for write I/O and DIF strip for read I/O DIF +sock_priority | Optional | number | The socket priority of the connection owned by this transport (TCP only) +acceptor_backlog | Optional | number | The number of pending connections allowed in backlog before failing new connection attempts (RDMA only) +abort_timeout_sec | Optional | number | Abort execution timeout value, in seconds + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "method": "nvmf_create_transport", + "id": 1, + "params": { + "trtype": "RDMA", + "max_queue_depth": 32 + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## nvmf_get_subsystems method {#rpc_nvmf_get_subsystems} + +### Parameters + +Name | Optional | Type | Description +--------------------------- | -------- | ------------| ----------- +tgt_name | Optional | string | Parent NVMe-oF target name. + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "method": "nvmf_get_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", + "model_number": "ghijklmnop", + "namespaces": [ + {"nsid": 1, "name": "Malloc2"}, + {"nsid": 2, "name": "Nvme0n1"} + ] + } + ] +} +~~~ + +## nvmf_create_subsystem method {#rpc_nvmf_create_subsystem} + +Construct an NVMe over Fabrics target subsystem. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +nqn | Required | string | Subsystem NQN +tgt_name | Optional | string | Parent NVMe-oF target name. +serial_number | Optional | string | Serial number of virtual controller +model_number | Optional | string | Model 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_create_subsystem", + "params": { + "nqn": "nqn.2016-06.io.spdk:cnode1", + "allow_any_host": false, + "serial_number": "abcdef", + "model_number": "ghijklmnop" + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## nvmf_delete_subsystem method {#rpc_nvmf_delete_subsystem} + +Delete an existing NVMe-oF subsystem. + +### Parameters + +Parameter | Optional | Type | Description +---------------------- | -------- | ----------- | ----------- +nqn | Required | string | Subsystem NQN to delete. +tgt_name | Optional | string | Parent NVMe-oF target name. + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "method": "nvmf_delete_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 +tgt_name | Optional | string | Parent NVMe-oF target name. +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 +tgt_name | Optional | string | Parent NVMe-oF target name. + +### 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") +ptpl_file | Optional | string | File path to save/restore persistent reservation information + +### 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", + "ptpl_file": "/opt/Nvme0n1PR.json" + } + } +} +~~~ + +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 +tgt_name | Optional | string | Parent NVMe-oF target name. + +### 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 +tgt_name | Optional | string | Parent NVMe-oF target name. + +### 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 +tgt_name | Optional | string | Parent NVMe-oF target name. + +### 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`). +tgt_name | Optional | string | Parent NVMe-oF target name. + +### 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 +} +~~~ + +## nvmf_set_max_subsystems {#rpc_nvmf_set_max_subsystems} + +Set the maximum allowed subsystems for the NVMe-oF target. This RPC may only be called +before SPDK subsystems have been initialized. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +max_subsystems | Required | number | Maximum number of NVMe-oF subsystems + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "method": "nvmf_set_max_subsystems", + "params": { + "max_subsystems": 1024 + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## nvmf_set_config {#rpc_nvmf_set_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) +admin_cmd_passthru | Optional | object | Admin command passthru configuration + +### admin_cmd_passthru {#spdk_nvmf_admin_passthru_conf} + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +identify_ctrlr | Required | bool | If true, enables custom identify handler that reports some identify attributes from the underlying NVMe drive + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "method": "nvmf_set_config", + "params": { + "acceptor_poll_rate": 10000 + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## nvmf_get_transports method {#rpc_nvmf_get_transports} + +### Parameters + +Name | Optional | Type | Description +--------------------------- | -------- | ------------| ----------- +tgt_name | Optional | string | Parent NVMe-oF target name. + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "method": "nvmf_get_transports" +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": [ + { + "type": "RDMA". + "max_queue_depth": 128, + "max_io_qpairs_per_ctrlr": 64, + "in_capsule_data_size": 4096, + "max_io_size": 131072, + "io_unit_size": 131072, + "abort_timeout_sec": 1 + } + ] +} +~~~ + +## nvmf_get_stats method {#rpc_nvmf_get_stats} + +Retrieve current statistics of the NVMf subsystem. + +### Parameters + +Name | Optional | Type | Description +--------------------------- | -------- | ------------| ----------- +tgt_name | Optional | string | Parent NVMe-oF target name. + +### Response + +The response is an object containing NVMf subsystem statistics. + +### Example + +Example request: +~~~ +{ + "jsonrpc": "2.0", + "method": "nvmf_get_stats", + "id": 1 +} +~~~ + +Example response: +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": { + "tick_rate": 2400000000, + "poll_groups": [ + { + "name": "app_thread", + "admin_qpairs": 1, + "io_qpairs": 4, + "pending_bdev_io": 1721, + "transports": [ + { + "trtype": "RDMA", + "pending_data_buffer": 12131888, + "devices": [ + { + "name": "mlx5_1", + "polls": 72284105, + "completions": 0, + "requests": 0, + "request_latency": 0, + "pending_free_request": 0, + "pending_rdma_read": 0, + "pending_rdma_write": 0 + }, + { + "name": "mlx5_0", + "polls": 72284105, + "completions": 15165875, + "requests": 7582935, + "request_latency": 1249323766184, + "pending_free_request": 0, + "pending_rdma_read": 337602, + "pending_rdma_write": 0 + } + ] + } + ] + } + ] + } +} +~~~ + +# 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. + +## vhost_controller_set_coalescing {#rpc_vhost_controller_set_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": "vhost_controller_set_coalescing", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## vhost_create_scsi_controller {#rpc_vhost_create_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": "vhost_create_scsi_controller", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## vhost_scsi_controller_add_target {#rpc_vhost_scsi_controller_add_target} + +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 or -1 to use first free ID. +bdev_name | Required | string | Name of bdev to expose as a LUN 0 + +### Response + +SCSI target ID. + +### Example + +Example request: + +~~~ +{ + "params": { + "scsi_target_num": 1, + "bdev_name": "Malloc0", + "ctrlr": "VhostScsi0" + }, + "jsonrpc": "2.0", + "method": "vhost_scsi_controller_add_target", + "id": 1 +} +~~~ + +Example response: + +~~~ +response: +{ + "jsonrpc": "2.0", + "id": 1, + "result": 1 +} +~~~ + +## vhost_scsi_controller_remove_target {#rpc_vhost_scsi_controller_remove_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": "vhost_scsi_controller_remove_target", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## vhost_create_nvme_controller {#rpc_vhost_create_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": "vhost_create_nvme_controller", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## vhost_nvme_controller_add_ns {#rpc_vhost_nvme_controller_add_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": "vhost_nvme_controller_add_ns", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## vhost_create_blk_controller {#rpc_vhost_create_blk_controller} + +Create 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": "vhost_create_blk_controller", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## vhost_get_controllers {#rpc_vhost_get_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_vhost_get_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_vhost_get_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_vhost_get_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_vhost_get_controllers_scsi_luns + +### Vhost SCSI LUN {#rpc_vhost_get_controllers_scsi_luns} + +Object of type: + +Name | Type | Description +----------------------- | ----------- | ----------- +id | number | SCSI LUN ID +bdev_name | string | Backing bdev name + +### Vhost NVMe {#rpc_vhost_get_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": "vhost_get_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 + } + ] +} +~~~ + +## vhost_delete_controller {#rpc_vhost_delete_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_vhost_scsi_controller_remove_target. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +ctrlr | Required | string | Controller name + +### Example + +Example request: + +~~~ +{ + "params": { + "ctrlr": "VhostNvme0" + }, + "jsonrpc": "2.0", + "method": "vhost_delete_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. + +## bdev_lvol_create_lvstore {#rpc_bdev_lvol_create_lvstore} + +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 +clear_method | Optional | string | Change clear method for data region. Available: none, unmap (default), write_zeroes + +### Response + +UUID of the created logical volume store is returned. + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "method": "bdev_lvol_create_lvstore", + "params": { + "lvs_name": "LVS0", + "bdev_name": "Malloc0" + "clear_method": "write_zeroes" + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": "a9959197-b5e2-4f2d-8095-251ffb6985a5" +} +~~~ + +## bdev_lvol_delete_lvstore {#rpc_bdev_lvol_delete_lvstore} + +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": "bdev_lvol_delete_lvstore", + "id": 1 + "params": { + "uuid": "a9959197-b5e2-4f2d-8095-251ffb6985a5" + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## bdev_lvol_get_lvstores {#rpc_bdev_lvol_get_lvstores} + +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": "bdev_lvol_get_lvstores", + "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" + } + ] +} +~~~ + +## bdev_lvol_rename_lvstore {#rpc_bdev_lvol_rename_lvstore} + +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": "bdev_lvol_rename_lvstore", + "id": 1, + "params": { + "old_name": "LVS0", + "new_name": "LVS2" + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## bdev_lvol_create {#rpc_bdev_lvol_create} + +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 +clear_method | Optional | string | Change default data clusters clear method. Available: none, unmap, write_zeroes + +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": "bdev_lvol_create", + "id": 1, + "params": { + "lvol_name": "LVOL0", + "size": 1048576, + "lvs_name": "LVS0", + "clear_method": "unmap", + "thin_provision": true + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": "1b38702c-7f0c-411e-a962-92c6a5a8a602" +} +~~~ + +## bdev_lvol_snapshot {#rpc_bdev_lvol_snapshot} + +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": "bdev_lvol_snapshot", + "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" +} +~~~ + +## bdev_lvol_clone {#rpc_bdev_lvol_clone} + +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": "bdev_lvol_clone", + "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" +} +~~~ + +## bdev_lvol_rename {#rpc_bdev_lvol_rename} + +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": "bdev_lvol_rename", + "id": 1, + "params": { + "old_name": "067df606-6dbc-4143-a499-0d05855cb3b8", + "new_name": "LVOL2" + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## bdev_lvol_resize {#rpc_bdev_lvol_resize} + +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": "bdev_lvol_resize", + "id": 1, + "params": { + "name": "51638754-ca16-43a7-9f8f-294a0805ab0a", + "size": 2097152 + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## bdev_lvol_set_read_only{#rpc_bdev_lvol_set_read_only} + +Mark logical volume as read only. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Required | string | UUID or alias of the logical volume to set as read only + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "method": "bdev_lvol_set_read_only", + "id": 1, + "params": { + "name": "51638754-ca16-43a7-9f8f-294a0805ab0a", + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## bdev_lvol_delete {#rpc_bdev_lvol_delete} + +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": "bdev_lvol_delete", + "id": 1, + "params": { + "name": "51638754-ca16-43a7-9f8f-294a0805ab0a" + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## bdev_lvol_inflate {#rpc_bdev_lvol_inflate} + +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": "bdev_lvol_inflate", + "id": 1, + "params": { + "name": "8d87fccc-c278-49f0-9d4c-6237951aca09" + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## bdev_lvol_decouple_parent {#rpc_bdev_lvol_decouple_parent} + +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": "bdev_lvol_decouple_parent", + "id": 1. + "params": { + "name": "8d87fccc-c278-49f0-9d4c-6237951aca09" + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +# RAID + +## bdev_raid_get_bdevs {#rpc_bdev_raid_get_bdevs} + +This is used to list all the raid bdev names based on the input category requested. Category should be one +of 'all', 'online', 'configuring' or 'offline'. 'all' means all the raid bdevs whether they are online or +configuring or offline. 'online' is the raid bdev which is registered with bdev layer. 'configuring' is +the raid bdev which does not have full configuration discovered yet. 'offline' is the raid bdev which is +not registered with bdev as of now and it has encountered any error or user has requested to offline +the raid bdev. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +category | Required | string | all or online or configuring or offline + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "method": "bdev_raid_get_bdevs", + "id": 1, + "params": { + "category": "all" + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": [ + "Raid0" + ] +} +~~~ + +## bdev_raid_create {#rpc_bdev_raid_create} + +Constructs new RAID bdev. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Required | string | RAID bdev name +strip_size_kb | Required | number | Strip size in KB +raid_level | Required | number | RAID level +base_bdevs | Required | string | Base bdevs name, whitespace separated list in quotes + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "method": "bdev_raid_create", + "id": 1, + "params": { + "name": "Raid0", + "raid_level": 0, + "base_bdevs": [ + "Malloc0", + "Malloc1", + "Malloc2", + "Malloc3" + ], + "strip_size": 4096 + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## bdev_raid_delete {#rpc_bdev_raid_delete} + +Removes RAID bdev. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +name | Required | string | RAID bdev name + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "method": "bdev_raid_delete", + "id": 1, + "params": { + "name": "Raid0" + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +# OPAL + +## bdev_nvme_opal_init {#rpc_bdev_nvme_opal_init} + +This is used to initialize OPAL of a given NVMe ctrlr, including taking ownership and activating. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +nvme_ctrlr_name | Required | string | name of nvme ctrlr +password | Required | string | admin password of OPAL + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "method": "bdev_nvme_opal_init", + "id": 1, + "params": { + "nvme_ctrlr_name": "nvme0", + "password": "*****" + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## bdev_nvme_opal_revert {#rpc_bdev_nvme_opal_revert} + +This is used to revert OPAL to its factory settings. Erase all user configuration and data. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +nvme_ctrlr_name | Required | string | name of nvme ctrlr +password | Required | string | admin password of OPAL + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "method": "bdev_nvme_opal_revert", + "id": 1, + "params": { + "nvme_ctrlr_name": "nvme0", + "password": "*****" + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## bdev_opal_create {#rpc_bdev_opal_create} + +This is used to create an OPAL virtual bdev. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +nvme_ctrlr_name | Required | string | name of nvme ctrlr that supports OPAL +nsid | Required | number | namespace ID +locking_range_id | Required | number | OPAL locking range ID +range_start | Required | number | locking range start LBA +range_length | Required | number | locking range length +password | Required | string | admin password of OPAL + +### Response + +The response is the name of created OPAL virtual bdev. + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "method": "bdev_opal_create", + "id": 1, + "params": { + "nvme_ctrlr_name": "nvme0", + "nsid": 1, + "locking_range_id": 1, + "range_start": 0, + "range_length": 4096, + "password": "*****" + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": "nvme0n1r1" +} +~~~ + +## bdev_opal_get_info {#rpc_bdev_opal_get_info} + +This is used to get information of a given OPAL bdev. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +bdev_name | Required | string | name of OPAL vbdev +password | Required | string | admin password + +### Response + +The response is the locking info of OPAL virtual bdev. + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "method": "bdev_opal_get_info", + "id": 1, + "params": { + "bdev_name": "nvme0n1r1", + "password": "*****" + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": { + "name": "nvme0n1r1", + "range_start": 0, + "range_length": 4096, + "read_lock_enabled": true, + "write_lock_enabled": true, + "read_locked": false, + "write_locked": false + } +} +~~~ + +## bdev_opal_delete {#rpc_bdev_opal_delete} + +This is used to delete OPAL vbdev. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +bdev_name | Required | string | name of OPAL vbdev +password | Required | string | admin password + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "method": "bdev_opal_delete", + "id": 1, + "params": { + "bdev_name": "nvme0n1r1", + "password": "*****" + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## bdev_opal_new_user {#rpc_bdev_opal_new_user} + +This enables a new user to the specified opal bdev so that the user can lock/unlock the bdev. +Recalling this for the same opal bdev, only the newest user will have the privilege. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +bdev_name | Required | string | name of OPAL vbdev +admin_password | Required | string | admin password +user_id | Required | number | user ID +user_password | Required | string | user password + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "method": "bdev_opal_new_user", + "id": 1, + "params": { + "bdev_name": "nvme0n1r1", + "admin_password": "*****", + "user_id": "1", + "user_password": "********" + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +## bdev_opal_set_lock_state {#rpc_bdev_opal_set_lock_state} + +This is used to lock/unlock specific opal bdev providing user ID and password. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +bdev_name | Required | string | name of OPAL vbdev +user_id | Required | number | user ID +password | Required | string | user password +lock_state | Required | string | lock state + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "method": "bdev_opal_set_lock_state", + "id": 1, + "params": { + "bdev_name": "nvme0n1r1", + "user_id": "1", + "user_password": "********", + "lock_state": "rwlock" + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +# Notifications + +## notify_get_types {#rpc_notify_get_types} + +Return list of all supported notification types. + +### Parameters + +None + +### Response + +The response is an array of strings - supported RPC notification types. + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "method": "notify_get_types", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "id": 1, + "result": [ + "bdev_register", + "bdev_unregister" + ], + "jsonrpc": "2.0" +} +~~~ + +## notify_get_notifications {#notify_get_notifications} + +Request notifications. Returns array of notifications that happend since the specified id (or first that is available). + +Notice: Notifications are kept in circular buffer with limited size. Older notifications might be inaccesible due to being overwritten by new ones. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +id | Optional | number | First Event ID to fetch (default: first available). +max | Optional | number | Maximum number of event to return (default: no limit). + +### Response + +Response is an array of event objects. + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +id | Optional | number | Event ID. +type | Optional | number | Type of the event. +ctx | Optional | string | Event context. + +### Example + +Example request: + +~~~ +{ + "id": 1, + "jsonrpc": "2.0", + "method": "notify_get_notifications", + "params": { + "id": 1, + "max": 10 + } +} + +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": [ + { + "ctx": "Malloc0", + "type": "bdev_register", + "id": 1 + }, + { + "ctx": "Malloc2", + "type": "bdev_register", + "id": 2 + } + ] +} +~~~ + +# Linux Network Block Device (NBD) {#jsonrpc_components_nbd} + +SPDK supports exporting bdevs through Linux nbd. These devices then appear as standard Linux kernel block devices and can be accessed using standard utilities like fdisk. + +In order to export a device over nbd, first make sure the Linux kernel nbd driver is loaded by running 'modprobe nbd'. + +## nbd_start_disk {#rpc_nbd_start_disk} + +Start to export one SPDK bdev as NBD disk + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +bdev_name | Required | string | Bdev name to export +nbd_device | Optional | string | NBD device name to assign + +### Response + +Path of exported NBD disk + +### Example + +Example request: + +~~~ +{ + "params": { + "nbd_device": "/dev/nbd1", + "bdev_name": "Malloc1" + }, + "jsonrpc": "2.0", + "method": "nbd_start_disk", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": "/dev/nbd1" +} +~~~ + +## nbd_stop_disk {#rpc_nbd_stop_disk} + +Stop one NBD disk which is based on SPDK bdev. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +nbd_device | Required | string | NBD device name to stop + +### Example + +Example request: + +~~~ +{ + "params": { + "nbd_device": "/dev/nbd1", + }, + "jsonrpc": "2.0", + "method": "nbd_stop_disk", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": "true" +} +~~~ + +## nbd_get_disks {#rpc_nbd_get_disks} + +Display all or specified NBD device list + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +nbd_device | Optional | string | NBD device name to display + +### Response + +The response is an array of exported NBD devices and their corresponding SPDK bdev. + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "method": "nbd_get_disks", + "id": 1 +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": [ + { + "bdev_name": "Malloc0", + "nbd_device": "/dev/nbd0" + }, + { + "bdev_name": "Malloc1", + "nbd_device": "/dev/nbd1" + } + ] +} +~~~ + +# Blobfs {#jsonrpc_components_blobfs} + +## blobfs_detect {#rpc_blobfs_detect} + +Detect whether a blobfs exists on bdev. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +bdev_name | Required | string | Block device name to detect blobfs + +### Response + +True if a blobfs exists on the bdev; False otherwise. + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "method": "blobfs_detect", + "params": { + "bdev_name": "Malloc0" + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": "true" +} +~~~ + +## blobfs_create {#rpc_blobfs_create} + +Build blobfs on bdev. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +bdev_name | Required | string | Block device name to create blobfs +cluster_sz | Optional | number | Size of cluster in bytes. Must be multiple of 4KiB page size, default and minimal value is 1M. + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "method": "blobfs_create", + "params": { + "bdev_name": "Malloc0", + "cluster_sz": 1M + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": "true" +} +~~~ + +## blobfs_mount {#rpc_blobfs_mount} + +Mount a blobfs on bdev to one host path through FUSE + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +bdev_name | Required | string | Block device name where the blobfs is +mountpoint | Required | string | Mountpoint path in host to mount blobfs + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "method": ""blobfs_mount"", + "params": { + "bdev_name": "Malloc0", + "mountpoint": "/mnt/" + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": "true" +} +~~ + +## blobfs_set_cache_size {#rpc_blobfs_set_cache_size} + +Set cache pool size for blobfs filesystems. This RPC is only permitted when the cache pool is not already initialized. + +The cache pool is initialized when the first blobfs filesystem is initialized or loaded. It is freed when the all initialized or loaded filesystems are unloaded. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +size_in_mb | Required | number | Cache size in megabytes + +### Response + +True if cache size is set successfully; False if failed to set. + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "method": "blobfs_set_cache_size", + "params": { + "size_in_mb": 512, + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +# Socket layer {#jsonrpc_components_sock} + +## sock_impl_get_options {#rpc_sock_impl_get_options} + +Get parameters for the socket layer implementation. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +impl_name | Required | string | Name of socket implementation, e.g. posix + +### Response + +Response is an object with current socket layer options for requested implementation. + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "method": "sock_impl_get_options", + "id": 1, + "params": { + "impl_name": "posix" + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": { + "recv_buf_size": 2097152, + "send_buf_size": 2097152, + "enable_recv_pipe": true + "enable_zerocopy_send": true + } +} +~~~ + +## sock_impl_set_options {#rpc_sock_impl_set_options} + +Set parameters for the socket layer implementation. + +### Parameters + +Name | Optional | Type | Description +----------------------- | -------- | ----------- | ----------- +impl_name | Required | string | Name of socket implementation, e.g. posix +recv_buf_size | Optional | number | Size of socket receive buffer in bytes +send_buf_size | Optional | number | Size of socket send buffer in bytes +enable_recv_pipe | Optional | boolean | Enable or disable receive pipe +enable_zerocopy_send | Optional | boolean | Enable or disable zero copy on send + +### Response + +True if socket layer options were set successfully. + +### Example + +Example request: + +~~~ +{ + "jsonrpc": "2.0", + "method": "sock_impl_set_options", + "id": 1, + "params": { + "impl_name": "posix", + "recv_buf_size": 2097152, + "send_buf_size": 2097152, + "enable_recv_pipe": false + "enable_zerocopy_send": true + } +} +~~~ + +Example response: + +~~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": true +} +~~~ + +# Miscellaneous RPC commands + +## bdev_nvme_send_cmd {#rpc_bdev_nvme_send_cmd} + +Send NVMe command directly to NVMe controller or namespace. Parameters and responses encoded by base64 urlsafe need further processing. + +Notice: bdev_nvme_send_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": "bdev_nvme_send_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" + } + +} +~~~ + +## spdk_get_version {#rpc_spdk_get_version} + +Get the version info of the running SPDK application. + +### Parameters + +This method has no parameters. + +### Response + +The response is the version number including major version number, minor version number, patch level number and suffix string. + +### Example + +Example request: +~~ +{ + "jsonrpc": "2.0", + "id": 1, + "method": "spdk_get_version" +} +~~ + +Example response: +~~ +{ + "jsonrpc": "2.0", + "id": 1, + "result": { + "version": "19.04-pre", + "fields" : { + "major": 19, + "minor": 4, + "patch": 0, + "suffix": "-pre" + } + } +} +~~ |