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numam-spdk/include/spdk/nvme.h
Tomasz Kulasek 11aca20442 nvme/cuse: add spdk_nvme_cuse_update api 
spdk_nvme_cuse_update_namespaces() API allows application
to repopulate namespaces on NVMe CUSE devices.

Change-Id: I5375b13bcc91b17cd26b4dc6f02d83dc33826542
Signed-off-by: Tomasz Kulasek <tomaszx.kulasek@intel.com>
Signed-off-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/658
Community-CI: Broadcom CI
Community-CI: Mellanox Build Bot
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
2020-06-05 09:01:44 +00:00

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/*-
* BSD LICENSE
*
* Copyright (c) Intel Corporation. All rights reserved.
* Copyright (c) 2019, 2020 Mellanox Technologies LTD. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/** \file
* NVMe driver public API
*/
#ifndef SPDK_NVME_H
#define SPDK_NVME_H
#include "spdk/stdinc.h"
#ifdef __cplusplus
extern "C" {
#endif
#include "spdk/env.h"
#include "spdk/nvme_spec.h"
#include "spdk/nvmf_spec.h"
#define SPDK_NVME_TRANSPORT_NAME_FC "FC"
#define SPDK_NVME_TRANSPORT_NAME_PCIE "PCIE"
#define SPDK_NVME_TRANSPORT_NAME_RDMA "RDMA"
#define SPDK_NVME_TRANSPORT_NAME_TCP "TCP"
#define SPDK_NVMF_PRIORITY_MAX_LEN 4
/**
* Opaque handle to a controller. Returned by spdk_nvme_probe()'s attach_cb.
*/
struct spdk_nvme_ctrlr;
/**
* NVMe controller initialization options.
*
* A pointer to this structure will be provided for each probe callback from spdk_nvme_probe() to
* allow the user to request non-default options, and the actual options enabled on the controller
* will be provided during the attach callback.
*/
struct spdk_nvme_ctrlr_opts {
/**
* Number of I/O queues to request (used to set Number of Queues feature)
*/
uint32_t num_io_queues;
/**
* Enable submission queue in controller memory buffer
*/
bool use_cmb_sqs;
/**
* Don't initiate shutdown processing
*/
bool no_shn_notification;
/**
* Type of arbitration mechanism
*/
enum spdk_nvme_cc_ams arb_mechanism;
/**
* Maximum number of commands that the controller may launch at one time. The
* value is expressed as a power of two, valid values are from 0-7, and 7 means
* unlimited.
*/
uint8_t arbitration_burst;
/**
* Number of commands that may be executed from the low priority queue in each
* arbitration round. This field is only valid when arb_mechanism is set to
* SPDK_NVME_CC_AMS_WRR (weighted round robin).
*/
uint8_t low_priority_weight;
/**
* Number of commands that may be executed from the medium priority queue in each
* arbitration round. This field is only valid when arb_mechanism is set to
* SPDK_NVME_CC_AMS_WRR (weighted round robin).
*/
uint8_t medium_priority_weight;
/**
* Number of commands that may be executed from the high priority queue in each
* arbitration round. This field is only valid when arb_mechanism is set to
* SPDK_NVME_CC_AMS_WRR (weighted round robin).
*/
uint8_t high_priority_weight;
/**
* Keep alive timeout in milliseconds (0 = disabled).
*
* The NVMe library will set the Keep Alive Timer feature to this value and automatically
* send Keep Alive commands as needed. The library user must call
* spdk_nvme_ctrlr_process_admin_completions() periodically to ensure Keep Alive commands
* are sent.
*/
uint32_t keep_alive_timeout_ms;
/**
* Specify the retry number when there is issue with the transport
*/
uint8_t transport_retry_count;
/**
* The queue depth of each NVMe I/O queue.
*/
uint32_t io_queue_size;
/**
* The host NQN to use when connecting to NVMe over Fabrics controllers.
*
* Unused for local PCIe-attached NVMe devices.
*/
char hostnqn[SPDK_NVMF_NQN_MAX_LEN + 1];
/**
* The number of requests to allocate for each NVMe I/O queue.
*
* This should be at least as large as io_queue_size.
*
* A single I/O may allocate more than one request, since splitting may be necessary to
* conform to the device's maximum transfer size, PRP list compatibility requirements,
* or driver-assisted striping.
*/
uint32_t io_queue_requests;
/**
* Source address for NVMe-oF connections.
* Set src_addr and src_svcid to empty strings if no source address should be
* specified.
*/
char src_addr[SPDK_NVMF_TRADDR_MAX_LEN + 1];
/**
* Source service ID (port) for NVMe-oF connections.
* Set src_addr and src_svcid to empty strings if no source address should be
* specified.
*/
char src_svcid[SPDK_NVMF_TRSVCID_MAX_LEN + 1];
/**
* The host identifier to use when connecting to controllers with 64-bit host ID support.
*
* Set to all zeroes to specify that no host ID should be provided to the controller.
*/
uint8_t host_id[8];
/**
* The host identifier to use when connecting to controllers with extended (128-bit) host ID support.
*
* Set to all zeroes to specify that no host ID should be provided to the controller.
*/
uint8_t extended_host_id[16];
/**
* The I/O command set to select.
*
* If the requested command set is not supported, the controller
* initialization process will not proceed. By default, the NVM
* command set is used.
*/
enum spdk_nvme_cc_css command_set;
/**
* Admin commands timeout in milliseconds (0 = no timeout).
*
* The timeout value is used for admin commands submitted internally
* by the nvme driver during initialization, before the user is able
* to call spdk_nvme_ctrlr_register_timeout_callback(). By default,
* this is set to 120 seconds, users can change it in the probing
* callback.
*/
uint32_t admin_timeout_ms;
/**
* It is used for TCP transport.
*
* Set to true, means having header digest for the header in the NVMe/TCP PDU
*/
bool header_digest;
/**
* It is used for TCP transport.
*
* Set to true, means having data digest for the data in the NVMe/TCP PDU
*/
bool data_digest;
/**
* Disable logging of requests that are completed with error status.
*
* Defaults to 'false' (errors are logged).
*/
bool disable_error_logging;
/**
* It is used for RDMA transport
* Specify the transport ACK timeout. The value should be in range 0-31 where 0 means
* use driver-specific default value. The value is applied to each RDMA qpair
* and affects the time that qpair waits for transport layer acknowledgement
* until it retransmits a packet. The value should be chosen empirically
* to meet the needs of a particular application. A low value means less time
* the qpair waits for ACK which can increase the number of retransmissions.
* A large value can increase the time the connection is closed.
* The value of ACK timeout is calculated according to the formula
* 4.096 * 2^(transport_ack_timeout) usec.
*/
uint8_t transport_ack_timeout;
/**
* The queue depth of NVMe Admin queue.
*/
uint16_t admin_queue_size;
};
/**
* Indicate whether a ctrlr handle is associated with a Discovery controller.
*
* \param ctrlr Opaque handle to NVMe controller.
*
* \return true if a discovery controller, else false.
*/
bool spdk_nvme_ctrlr_is_discovery(struct spdk_nvme_ctrlr *ctrlr);
/**
* Get the default options for the creation of a specific NVMe controller.
*
* \param[out] opts Will be filled with the default option.
* \param opts_size Must be set to sizeof(struct spdk_nvme_ctrlr_opts).
*/
void spdk_nvme_ctrlr_get_default_ctrlr_opts(struct spdk_nvme_ctrlr_opts *opts,
size_t opts_size);
/**
* Reason for qpair disconnect at the transport layer.
*
* NONE implies that the qpair is still connected while UNKNOWN means that the
* qpair is disconnected, but the cause was not apparent.
*/
enum spdk_nvme_qp_failure_reason {
SPDK_NVME_QPAIR_FAILURE_NONE = 0,
SPDK_NVME_QPAIR_FAILURE_LOCAL,
SPDK_NVME_QPAIR_FAILURE_REMOTE,
SPDK_NVME_QPAIR_FAILURE_UNKNOWN,
};
typedef enum spdk_nvme_qp_failure_reason spdk_nvme_qp_failure_reason;
/**
* NVMe library transports
*
* NOTE: These are mapped directly to the NVMe over Fabrics TRTYPE values, except for PCIe,
* which is a special case since NVMe over Fabrics does not define a TRTYPE for local PCIe.
*
* Currently, this uses 256 for PCIe which is intentionally outside of the 8-bit range of TRTYPE.
* If the NVMe-oF specification ever defines a PCIe TRTYPE, this should be updated.
*/
enum spdk_nvme_transport_type {
/**
* PCIe Transport (locally attached devices)
*/
SPDK_NVME_TRANSPORT_PCIE = 256,
/**
* RDMA Transport (RoCE, iWARP, etc.)
*/
SPDK_NVME_TRANSPORT_RDMA = SPDK_NVMF_TRTYPE_RDMA,
/**
* Fibre Channel (FC) Transport
*/
SPDK_NVME_TRANSPORT_FC = SPDK_NVMF_TRTYPE_FC,
/**
* TCP Transport
*/
SPDK_NVME_TRANSPORT_TCP = SPDK_NVMF_TRTYPE_TCP,
/**
* Custom Transport (Not spec defined)
*/
SPDK_NVME_TRANSPORT_CUSTOM = 4096,
};
/* typedef added for coding style reasons */
typedef enum spdk_nvme_transport_type spdk_nvme_transport_type_t;
/**
* NVMe transport identifier.
*
* This identifies a unique endpoint on an NVMe fabric.
*
* A string representation of a transport ID may be converted to this type using
* spdk_nvme_transport_id_parse().
*/
struct spdk_nvme_transport_id {
/**
* NVMe transport string.
*/
char trstring[SPDK_NVMF_TRSTRING_MAX_LEN + 1];
/**
* NVMe transport type.
*/
enum spdk_nvme_transport_type trtype;
/**
* Address family of the transport address.
*
* For PCIe, this value is ignored.
*/
enum spdk_nvmf_adrfam adrfam;
/**
* Transport address of the NVMe-oF endpoint. For transports which use IP
* addressing (e.g. RDMA), this should be an IP address. For PCIe, this
* can either be a zero length string (the whole bus) or a PCI address
* in the format DDDD:BB:DD.FF or DDDD.BB.DD.FF. For FC the string is
* formatted as: nn-0xWWNN:pn-0xWWPN” where WWNN is the Node_Name of the
* target NVMe_Port and WWPN is the N_Port_Name of the target NVMe_Port.
*/
char traddr[SPDK_NVMF_TRADDR_MAX_LEN + 1];
/**
* Transport service id of the NVMe-oF endpoint. For transports which use
* IP addressing (e.g. RDMA), this field shoud be the port number. For PCIe,
* and FC this is always a zero length string.
*/
char trsvcid[SPDK_NVMF_TRSVCID_MAX_LEN + 1];
/**
* Subsystem NQN of the NVMe over Fabrics endpoint. May be a zero length string.
*/
char subnqn[SPDK_NVMF_NQN_MAX_LEN + 1];
/**
* The Transport connection priority of the NVMe-oF endpoint. Currently this is
* only supported by posix based sock implementation on Kernel TCP stack. More
* information of this field can be found from the socket(7) man page.
*/
int priority;
};
/**
* NVMe host identifier
*
* Used for defining the host identity for an NVMe-oF connection.
*
* In terms of configuration, this object can be considered a subtype of TransportID
* Please see etc/spdk/nvmf.conf.in for more details.
*
* A string representation of this type may be converted to this type using
* spdk_nvme_host_id_parse().
*/
struct spdk_nvme_host_id {
/**
* Transport address to be used by the host when connecting to the NVMe-oF endpoint.
* May be an IP address or a zero length string for transports which
* use IP addressing (e.g. RDMA).
* For PCIe and FC this is always a zero length string.
*/
char hostaddr[SPDK_NVMF_TRADDR_MAX_LEN + 1];
/**
* Transport service ID used by the host when connecting to the NVMe.
* May be a port number or a zero length string for transports which
* use IP addressing (e.g. RDMA).
* For PCIe and FC this is always a zero length string.
*/
char hostsvcid[SPDK_NVMF_TRSVCID_MAX_LEN + 1];
};
/*
* Controller support flags
*
* Used for identifying if the controller supports these flags.
*/
enum spdk_nvme_ctrlr_flags {
SPDK_NVME_CTRLR_SGL_SUPPORTED = 0x1, /**< SGL is supported */
SPDK_NVME_CTRLR_SECURITY_SEND_RECV_SUPPORTED = 0x2, /**< security send/receive is supported */
SPDK_NVME_CTRLR_WRR_SUPPORTED = 0x4, /**< Weighted Round Robin is supported */
SPDK_NVME_CTRLR_COMPARE_AND_WRITE_SUPPORTED = 0x8, /**< Compare and write fused operations supported */
SPDK_NVME_CTRLR_SGL_REQUIRES_DWORD_ALIGNMENT = 0x10, /**< Dword alignment is required for SGL */
};
/**
* Parse the string representation of a transport ID.
*
* \param trid Output transport ID structure (must be allocated and initialized by caller).
* \param str Input string representation of a transport ID to parse.
*
* str must be a zero-terminated C string containing one or more key:value pairs
* separated by whitespace.
*
* Key | Value
* ------------ | -----
* trtype | Transport type (e.g. PCIe, RDMA)
* adrfam | Address family (e.g. IPv4, IPv6)
* traddr | Transport address (e.g. 0000:04:00.0 for PCIe, 192.168.100.8 for RDMA, or WWN for FC)
* trsvcid | Transport service identifier (e.g. 4420)
* subnqn | Subsystem NQN
*
* Unspecified fields of trid are left unmodified, so the caller must initialize
* trid (for example, memset() to 0) before calling this function.
*
* \return 0 if parsing was successful and trid is filled out, or negated errno
* values on failure.
*/
int spdk_nvme_transport_id_parse(struct spdk_nvme_transport_id *trid, const char *str);
/**
* Fill in the trtype and trstring fields of this trid based on a known transport type.
*
* \param trid The trid to fill out.
* \param trtype The transport type to use for filling the trid fields. Only valid for
* transport types referenced in the NVMe-oF spec.
*/
void spdk_nvme_trid_populate_transport(struct spdk_nvme_transport_id *trid,
enum spdk_nvme_transport_type trtype);
/**
* Parse the string representation of a host ID.
*
* \param hostid Output host ID structure (must be allocated and initialized by caller).
* \param str Input string representation of a transport ID to parse (hostid is a sub-configuration).
*
* str must be a zero-terminated C string containing one or more key:value pairs
* separated by whitespace.
*
* Key | Value
* -------------- | -----
* hostaddr | Transport address (e.g. 192.168.100.8 for RDMA)
* hostsvcid | Transport service identifier (e.g. 4420)
*
* Unspecified fields of trid are left unmodified, so the caller must initialize
* hostid (for example, memset() to 0) before calling this function.
*
* This function should not be used with Fiber Channel or PCIe as these transports
* do not require host information for connections.
*
* \return 0 if parsing was successful and hostid is filled out, or negated errno
* values on failure.
*/
int spdk_nvme_host_id_parse(struct spdk_nvme_host_id *hostid, const char *str);
/**
* Parse the string representation of a transport ID tranport type into the trid struct.
*
* \param trid The trid to write to
* \param trstring Input string representation of transport type (e.g. "PCIe", "RDMA").
*
* \return 0 if parsing was successful and trtype is filled out, or negated errno
* values if the provided string was an invalid transport string.
*/
int spdk_nvme_transport_id_populate_trstring(struct spdk_nvme_transport_id *trid,
const char *trstring);
/**
* Parse the string representation of a transport ID tranport type.
*
* \param trtype Output transport type (allocated by caller).
* \param str Input string representation of transport type (e.g. "PCIe", "RDMA").
*
* \return 0 if parsing was successful and trtype is filled out, or negated errno
* values on failure.
*/
int spdk_nvme_transport_id_parse_trtype(enum spdk_nvme_transport_type *trtype, const char *str);
/**
* Look up the string representation of a transport ID transport type.
*
* \param trtype Transport type to convert.
*
* \return static string constant describing trtype, or NULL if trtype not found.
*/
const char *spdk_nvme_transport_id_trtype_str(enum spdk_nvme_transport_type trtype);
/**
* Look up the string representation of a transport ID address family.
*
* \param adrfam Address family to convert.
*
* \return static string constant describing adrfam, or NULL if adrmfam not found.
*/
const char *spdk_nvme_transport_id_adrfam_str(enum spdk_nvmf_adrfam adrfam);
/**
* Parse the string representation of a tranport ID address family.
*
* \param adrfam Output address family (allocated by caller).
* \param str Input string representation of address family (e.g. "IPv4", "IPv6").
*
* \return 0 if parsing was successful and adrfam is filled out, or negated errno
* values on failure.
*/
int spdk_nvme_transport_id_parse_adrfam(enum spdk_nvmf_adrfam *adrfam, const char *str);
/**
* Compare two transport IDs.
*
* The result of this function may be used to sort transport IDs in a consistent
* order; however, the comparison result is not guaranteed to be consistent across
* library versions.
*
* This function uses a case-insensitive comparison for string fields, but it does
* not otherwise normalize the transport ID. It is the caller's responsibility to
* provide the transport IDs in a consistent format.
*
* \param trid1 First transport ID to compare.
* \param trid2 Second transport ID to compare.
*
* \return 0 if trid1 == trid2, less than 0 if trid1 < trid2, greater than 0 if
* trid1 > trid2.
*/
int spdk_nvme_transport_id_compare(const struct spdk_nvme_transport_id *trid1,
const struct spdk_nvme_transport_id *trid2);
/**
* Parse the string representation of PI check settings (prchk:guard|reftag)
*
* \param prchk_flags Output PI check flags.
* \param str Input string representation of PI check settings.
*
* \return 0 if parsing was successful and prchk_flags is set, or negated errno
* values on failure.
*/
int spdk_nvme_prchk_flags_parse(uint32_t *prchk_flags, const char *str);
/**
* Look up the string representation of PI check settings (prchk:guard|reftag)
*
* \param prchk_flags PI check flags to convert.
*
* \return static string constant describing PI check settings. If prchk_flags is 0,
* NULL is returned.
*/
const char *spdk_nvme_prchk_flags_str(uint32_t prchk_flags);
/**
* Determine whether the NVMe library can handle a specific NVMe over Fabrics
* transport type.
*
* \param trtype NVMe over Fabrics transport type to check.
*
* \return true if trtype is supported or false if it is not supported or if
* SPDK_NVME_TRANSPORT_CUSTOM is supplied as trtype since it can represent multiple
* transports.
*/
bool spdk_nvme_transport_available(enum spdk_nvme_transport_type trtype);
/**
* Determine whether the NVMe library can handle a specific NVMe over Fabrics
* transport type.
*
* \param transport_name Name of the NVMe over Fabrics transport type to check.
*
* \return true if transport_name is supported or false if it is not supported.
*/
bool spdk_nvme_transport_available_by_name(const char *transport_name);
/**
* Callback for spdk_nvme_probe() enumeration.
*
* \param cb_ctx Opaque value passed to spdk_nvme_probe().
* \param trid NVMe transport identifier.
* \param opts NVMe controller initialization options. This structure will be
* populated with the default values on entry, and the user callback may update
* any options to request a different value. The controller may not support all
* requested parameters, so the final values will be provided during the attach
* callback.
*
* \return true to attach to this device.
*/
typedef bool (*spdk_nvme_probe_cb)(void *cb_ctx, const struct spdk_nvme_transport_id *trid,
struct spdk_nvme_ctrlr_opts *opts);
/**
* Callback for spdk_nvme_attach() to report a device that has been attached to
* the userspace NVMe driver.
*
* \param cb_ctx Opaque value passed to spdk_nvme_attach_cb().
* \param trid NVMe transport identifier.
* \param ctrlr Opaque handle to NVMe controller.
* \param opts NVMe controller initialization options that were actually used.
* Options may differ from the requested options from the attach call depending
* on what the controller supports.
*/
typedef void (*spdk_nvme_attach_cb)(void *cb_ctx, const struct spdk_nvme_transport_id *trid,
struct spdk_nvme_ctrlr *ctrlr,
const struct spdk_nvme_ctrlr_opts *opts);
/**
* Callback for spdk_nvme_remove() to report that a device attached to the userspace
* NVMe driver has been removed from the system.
*
* The controller will remain in a failed state (any new I/O submitted will fail).
*
* The controller must be detached from the userspace driver by calling spdk_nvme_detach()
* once the controller is no longer in use. It is up to the library user to ensure
* that no other threads are using the controller before calling spdk_nvme_detach().
*
* \param cb_ctx Opaque value passed to spdk_nvme_remove_cb().
* \param ctrlr NVMe controller instance that was removed.
*/
typedef void (*spdk_nvme_remove_cb)(void *cb_ctx, struct spdk_nvme_ctrlr *ctrlr);
/**
* Enumerate the bus indicated by the transport ID and attach the userspace NVMe
* driver to each device found if desired.
*
* This function is not thread safe and should only be called from one thread at
* a time while no other threads are actively using any NVMe devices.
*
* If called from a secondary process, only devices that have been attached to
* the userspace driver in the primary process will be probed.
*
* If called more than once, only devices that are not already attached to the
* SPDK NVMe driver will be reported.
*
* To stop using the the controller and release its associated resources,
* call spdk_nvme_detach() with the spdk_nvme_ctrlr instance from the attach_cb()
* function.
*
* \param trid The transport ID indicating which bus to enumerate. If the trtype
* is PCIe or trid is NULL, this will scan the local PCIe bus. If the trtype is
* RDMA, the traddr and trsvcid must point at the location of an NVMe-oF discovery
* service.
* \param cb_ctx Opaque value which will be passed back in cb_ctx parameter of
* the callbacks.
* \param probe_cb will be called once per NVMe device found in the system.
* \param attach_cb will be called for devices for which probe_cb returned true
* once that NVMe controller has been attached to the userspace driver.
* \param remove_cb will be called for devices that were attached in a previous
* spdk_nvme_probe() call but are no longer attached to the system. Optional;
* specify NULL if removal notices are not desired.
*
* \return 0 on success, -1 on failure.
*/
int spdk_nvme_probe(const struct spdk_nvme_transport_id *trid,
void *cb_ctx,
spdk_nvme_probe_cb probe_cb,
spdk_nvme_attach_cb attach_cb,
spdk_nvme_remove_cb remove_cb);
/**
* Connect the NVMe driver to the device located at the given transport ID.
*
* This function is not thread safe and should only be called from one thread at
* a time while no other threads are actively using this NVMe device.
*
* If called from a secondary process, only the device that has been attached to
* the userspace driver in the primary process will be connected.
*
* If connecting to multiple controllers, it is suggested to use spdk_nvme_probe()
* and filter the requested controllers with the probe callback. For PCIe controllers,
* spdk_nvme_probe() will be more efficient since the controller resets will happen
* in parallel.
*
* To stop using the the controller and release its associated resources, call
* spdk_nvme_detach() with the spdk_nvme_ctrlr instance returned by this function.
*
* \param trid The transport ID indicating which device to connect. If the trtype
* is PCIe, this will connect the local PCIe bus. If the trtype is RDMA, the traddr
* and trsvcid must point at the location of an NVMe-oF service.
* \param opts NVMe controller initialization options. Default values will be used
* if the user does not specify the options. The controller may not support all
* requested parameters.
* \param opts_size Must be set to sizeof(struct spdk_nvme_ctrlr_opts), or 0 if
* opts is NULL.
*
* \return pointer to the connected NVMe controller or NULL if there is any failure.
*
*/
struct spdk_nvme_ctrlr *spdk_nvme_connect(const struct spdk_nvme_transport_id *trid,
const struct spdk_nvme_ctrlr_opts *opts,
size_t opts_size);
struct spdk_nvme_probe_ctx;
/**
* Connect the NVMe driver to the device located at the given transport ID.
*
* The function will return a probe context on success, controller associates with
* the context is not ready for use, user must call spdk_nvme_probe_poll_async()
* until spdk_nvme_probe_poll_async() returns 0.
*
* \param trid The transport ID indicating which device to connect. If the trtype
* is PCIe, this will connect the local PCIe bus. If the trtype is RDMA, the traddr
* and trsvcid must point at the location of an NVMe-oF service.
* \param opts NVMe controller initialization options. Default values will be used
* if the user does not specify the options. The controller may not support all
* requested parameters.
* \param attach_cb will be called once the NVMe controller has been attached
* to the userspace driver.
*
* \return probe context on success, NULL on failure.
*
*/
struct spdk_nvme_probe_ctx *spdk_nvme_connect_async(const struct spdk_nvme_transport_id *trid,
const struct spdk_nvme_ctrlr_opts *opts,
spdk_nvme_attach_cb attach_cb);
/**
* Probe and add controllers to the probe context list.
*
* Users must call spdk_nvme_probe_poll_async() to initialize
* controllers in the probe context list to the READY state.
*
* \param trid The transport ID indicating which bus to enumerate. If the trtype
* is PCIe or trid is NULL, this will scan the local PCIe bus. If the trtype is
* RDMA, the traddr and trsvcid must point at the location of an NVMe-oF discovery
* service.
* \param cb_ctx Opaque value which will be passed back in cb_ctx parameter of
* the callbacks.
* \param probe_cb will be called once per NVMe device found in the system.
* \param attach_cb will be called for devices for which probe_cb returned true
* once that NVMe controller has been attached to the userspace driver.
* \param remove_cb will be called for devices that were attached in a previous
* spdk_nvme_probe() call but are no longer attached to the system. Optional;
* specify NULL if removal notices are not desired.
*
* \return probe context on success, NULL on failure.
*/
struct spdk_nvme_probe_ctx *spdk_nvme_probe_async(const struct spdk_nvme_transport_id *trid,
void *cb_ctx,
spdk_nvme_probe_cb probe_cb,
spdk_nvme_attach_cb attach_cb,
spdk_nvme_remove_cb remove_cb);
/**
* Start controllers in the context list.
*
* Users may call the function util it returns True.
*
* \param probe_ctx Context used to track probe actions.
*
* \return 0 if all probe operations are complete; the probe_ctx
* is also freed and no longer valid.
* \return -EAGAIN if there are still pending probe operations; user must call
* spdk_nvme_probe_poll_async again to continue progress.
* \return value other than 0 and -EAGAIN probe error with one controller.
*/
int spdk_nvme_probe_poll_async(struct spdk_nvme_probe_ctx *probe_ctx);
/**
* Detach specified device returned by spdk_nvme_probe()'s attach_cb from the
* NVMe driver.
*
* On success, the spdk_nvme_ctrlr handle is no longer valid.
*
* This function should be called from a single thread while no other threads
* are actively using the NVMe device.
*
* \param ctrlr Opaque handle to NVMe controller.
*
* \return 0 on success, -1 on failure.
*/
int spdk_nvme_detach(struct spdk_nvme_ctrlr *ctrlr);
/**
* Update the transport ID for a given controller.
*
* This function allows the user to set a new trid for a controller only if the
* controller is failed. The controller's failed state can be obtained from
* spdk_nvme_ctrlr_is_failed(). The controller can also be forced to the failed
* state using spdk_nvme_ctrlr_fail().
*
* This function also requires that the transport type and subnqn of the new trid
* be the same as the old trid.
*
* \param ctrlr Opaque handle to an NVMe controller.
* \param trid The new transport ID.
*
* \return 0 on success, -EINVAL if the trid is invalid,
* -EPERM if the ctrlr is not failed.
*/
int spdk_nvme_ctrlr_set_trid(struct spdk_nvme_ctrlr *ctrlr, struct spdk_nvme_transport_id *trid);
/**
* Perform a full hardware reset of the NVMe controller.
*
* This function should be called from a single thread while no other threads
* are actively using the NVMe device.
*
* Any pointers returned from spdk_nvme_ctrlr_get_ns() and spdk_nvme_ns_get_data()
* may be invalidated by calling this function. The number of namespaces as returned
* by spdk_nvme_ctrlr_get_num_ns() may also change.
*
* \param ctrlr Opaque handle to NVMe controller.
*
* \return 0 on success, -1 on failure.
*/
int spdk_nvme_ctrlr_reset(struct spdk_nvme_ctrlr *ctrlr);
/**
* Fail the given NVMe controller.
*
* This function gives the application the opportunity to fail a controller
* at will. When a controller is failed, any calls to process completions or
* submit I/O on qpairs associated with that controller will fail with an error
* code of -ENXIO.
* The controller can only be taken from the failed state by
* calling spdk_nvme_ctrlr_reset. After the controller has been successfully
* reset, any I/O pending when the controller was moved to failed will be
* aborted back to the application and can be resubmitted. I/O can then resume.
*
* \param ctrlr Opaque handle to an NVMe controller.
*/
void spdk_nvme_ctrlr_fail(struct spdk_nvme_ctrlr *ctrlr);
/**
* This function returns the failed status of a given controller.
*
* \param ctrlr Opaque handle to an NVMe controller.
*
* \return True if the controller is failed, false otherwise.
*/
bool spdk_nvme_ctrlr_is_failed(struct spdk_nvme_ctrlr *ctrlr);
/**
* Get the identify controller data as defined by the NVMe specification.
*
* This function is thread safe and can be called at any point while the controller
* is attached to the SPDK NVMe driver.
*
* \param ctrlr Opaque handle to NVMe controller.
*
* \return pointer to the identify controller data.
*/
const struct spdk_nvme_ctrlr_data *spdk_nvme_ctrlr_get_data(struct spdk_nvme_ctrlr *ctrlr);
/**
* Get the NVMe controller CSTS (Status) register.
*
* \param ctrlr Opaque handle to NVMe controller.
*
* \return the NVMe controller CSTS (Status) register.
*/
union spdk_nvme_csts_register spdk_nvme_ctrlr_get_regs_csts(struct spdk_nvme_ctrlr *ctrlr);
/**
* Get the NVMe controller CAP (Capabilities) register.
*
* \param ctrlr Opaque handle to NVMe controller.
*
* \return the NVMe controller CAP (Capabilities) register.
*/
union spdk_nvme_cap_register spdk_nvme_ctrlr_get_regs_cap(struct spdk_nvme_ctrlr *ctrlr);
/**
* Get the NVMe controller VS (Version) register.
*
* \param ctrlr Opaque handle to NVMe controller.
*
* \return the NVMe controller VS (Version) register.
*/
union spdk_nvme_vs_register spdk_nvme_ctrlr_get_regs_vs(struct spdk_nvme_ctrlr *ctrlr);
/**
* Get the NVMe controller CMBSZ (Controller Memory Buffer Size) register
*
* \param ctrlr Opaque handle to NVMe controller.
*
* \return the NVMe controller CMBSZ (Controller Memory Buffer Size) register.
*/
union spdk_nvme_cmbsz_register spdk_nvme_ctrlr_get_regs_cmbsz(struct spdk_nvme_ctrlr *ctrlr);
/**
* Get the number of namespaces for the given NVMe controller.
*
* This function is thread safe and can be called at any point while the
* controller is attached to the SPDK NVMe driver.
*
* This is equivalent to calling spdk_nvme_ctrlr_get_data() to get the
* spdk_nvme_ctrlr_data and then reading the nn field.
*
* \param ctrlr Opaque handle to NVMe controller.
*
* \return the number of namespaces.
*/
uint32_t spdk_nvme_ctrlr_get_num_ns(struct spdk_nvme_ctrlr *ctrlr);
/**
* Get the PCI device of a given NVMe controller.
*
* This only works for local (PCIe-attached) NVMe controllers; other transports
* will return NULL.
*
* \param ctrlr Opaque handle to NVMe controller.
*
* \return PCI device of the NVMe controller, or NULL if not available.
*/
struct spdk_pci_device *spdk_nvme_ctrlr_get_pci_device(struct spdk_nvme_ctrlr *ctrlr);
/**
* Get the maximum data transfer size of a given NVMe controller.
*
* \return Maximum data transfer size of the NVMe controller in bytes.
*
* The I/O command helper functions, such as spdk_nvme_ns_cmd_read(), will split
* large I/Os automatically; however, it is up to the user to obey this limit for
* commands submitted with the raw command functions, such as spdk_nvme_ctrlr_cmd_io_raw().
*/
uint32_t spdk_nvme_ctrlr_get_max_xfer_size(const struct spdk_nvme_ctrlr *ctrlr);
/**
* Check whether the nsid is an active nv for the given NVMe controller.
*
* This function is thread safe and can be called at any point while the controller
* is attached to the SPDK NVMe driver.
*
* \param ctrlr Opaque handle to NVMe controller.
* \param nsid Namespace id.
*
* \return true if nsid is an active ns, or false otherwise.
*/
bool spdk_nvme_ctrlr_is_active_ns(struct spdk_nvme_ctrlr *ctrlr, uint32_t nsid);
/**
* Get the nsid of the first active namespace.
*
* This function is thread safe and can be called at any point while the controller
* is attached to the SPDK NVMe driver.
*
* \param ctrlr Opaque handle to NVMe controller.
*
* \return the nsid of the first active namespace, 0 if there are no active namespaces.
*/
uint32_t spdk_nvme_ctrlr_get_first_active_ns(struct spdk_nvme_ctrlr *ctrlr);
/**
* Get next active namespace given the previous nsid.
*
* This function is thread safe and can be called at any point while the controller
* is attached to the SPDK NVMe driver.
*
* \param ctrlr Opaque handle to NVMe controller.
* \param prev_nsid Namespace id.
*
* \return a next active namespace given the previous nsid, 0 when there are no
* more active namespaces.
*/
uint32_t spdk_nvme_ctrlr_get_next_active_ns(struct spdk_nvme_ctrlr *ctrlr, uint32_t prev_nsid);
/**
* Determine if a particular log page is supported by the given NVMe controller.
*
* This function is thread safe and can be called at any point while the controller
* is attached to the SPDK NVMe driver.
*
* \sa spdk_nvme_ctrlr_cmd_get_log_page().
*
* \param ctrlr Opaque handle to NVMe controller.
* \param log_page Log page to query.
*
* \return true if supported, or false otherwise.
*/
bool spdk_nvme_ctrlr_is_log_page_supported(struct spdk_nvme_ctrlr *ctrlr, uint8_t log_page);
/**
* Determine if a particular feature is supported by the given NVMe controller.
*
* This function is thread safe and can be called at any point while the controller
* is attached to the SPDK NVMe driver.
*
* \sa spdk_nvme_ctrlr_cmd_get_feature().
*
* \param ctrlr Opaque handle to NVMe controller.
* \param feature_code Feature to query.
*
* \return true if supported, or false otherwise.
*/
bool spdk_nvme_ctrlr_is_feature_supported(struct spdk_nvme_ctrlr *ctrlr, uint8_t feature_code);
/**
* Signature for callback function invoked when a command is completed.
*
* \param spdk_nvme_cpl Completion queue entry that coontains the completion status.
*/
typedef void (*spdk_nvme_cmd_cb)(void *, const struct spdk_nvme_cpl *);
/**
* Signature for callback function invoked when an asynchronous error request
* command is completed.
*
* \param ctrlr Opaque handle to NVMe controller.
* \param aer_cb_arg Context specified by spdk_nvme_register_aer_callback().
* \param spdk_nvme_cpl Completion queue entry that contains the completion status
* of the asynchronous event request that was completed.
*/
typedef void (*spdk_nvme_aer_cb)(void *aer_cb_arg,
const struct spdk_nvme_cpl *);
/**
* Register callback function invoked when an AER command is completed for the
* given NVMe controller.
*
* \param ctrlr Opaque handle to NVMe controller.
* \param aer_cb_fn Callback function invoked when an asynchronous error request
* command is completed.
* \param aer_cb_arg Argument passed to callback function.
*/
void spdk_nvme_ctrlr_register_aer_callback(struct spdk_nvme_ctrlr *ctrlr,
spdk_nvme_aer_cb aer_cb_fn,
void *aer_cb_arg);
/**
* Opaque handle to a queue pair.
*
* I/O queue pairs may be allocated using spdk_nvme_ctrlr_alloc_io_qpair().
*/
struct spdk_nvme_qpair;
/**
* Signature for the callback function invoked when a timeout is detected on a
* request.
*
* For timeouts detected on the admin queue pair, the qpair returned here will
* be NULL. If the controller has a serious error condition and is unable to
* communicate with driver via completion queue, the controller can set Controller
* Fatal Status field to 1, then reset is required to recover from such error.
* Users may detect Controller Fatal Status when timeout happens.
*
* \param cb_arg Argument passed to callback funciton.
* \param ctrlr Opaque handle to NVMe controller.
* \param qpair Opaque handle to a queue pair.
* \param cid Command ID.
*/
typedef void (*spdk_nvme_timeout_cb)(void *cb_arg,
struct spdk_nvme_ctrlr *ctrlr,
struct spdk_nvme_qpair *qpair,
uint16_t cid);
/**
* Register for timeout callback on a controller.
*
* The application can choose to register for timeout callback or not register
* for timeout callback.
*
* \param ctrlr NVMe controller on which to monitor for timeout.
* \param timeout_us Timeout value in microseconds.
* \param cb_fn A function pointer that points to the callback function.
* \param cb_arg Argument to the callback function.
*/
void spdk_nvme_ctrlr_register_timeout_callback(struct spdk_nvme_ctrlr *ctrlr,
uint64_t timeout_us, spdk_nvme_timeout_cb cb_fn, void *cb_arg);
/**
* NVMe I/O queue pair initialization options.
*
* These options may be passed to spdk_nvme_ctrlr_alloc_io_qpair() to configure queue pair
* options at queue creation time.
*
* The user may retrieve the default I/O queue pair creation options for a controller using
* spdk_nvme_ctrlr_get_default_io_qpair_opts().
*/
struct spdk_nvme_io_qpair_opts {
/**
* Queue priority for weighted round robin arbitration. If a different arbitration
* method is in use, pass 0.
*/
enum spdk_nvme_qprio qprio;
/**
* The queue depth of this NVMe I/O queue. Overrides spdk_nvme_ctrlr_opts::io_queue_size.
*/
uint32_t io_queue_size;
/**
* The number of requests to allocate for this NVMe I/O queue.
*
* Overrides spdk_nvme_ctrlr_opts::io_queue_requests.
*
* This should be at least as large as io_queue_size.
*
* A single I/O may allocate more than one request, since splitting may be
* necessary to conform to the device's maximum transfer size, PRP list
* compatibility requirements, or driver-assisted striping.
*/
uint32_t io_queue_requests;
/**
* When submitting I/O via spdk_nvme_ns_read/write and similar functions,
* don't immediately submit it to hardware. Instead, queue up new commands
* and submit them to the hardware inside spdk_nvme_qpair_process_completions().
*
* This results in better batching of I/O commands. Often, it is more efficient
* to submit batches of commands to the underlying hardware than each command
* individually.
*
* This only applies to PCIe and RDMA transports.
*
* The flag was originally named delay_pcie_doorbell. To allow backward compatibility
* both names are kept in unnamed union.
*/
union {
bool delay_cmd_submit;
bool delay_pcie_doorbell;
};
/**
* These fields allow specifying the memory buffers for the submission and/or
* completion queues.
* By default, vaddr is set to NULL meaning SPDK will allocate the memory to be used.
* If vaddr is NULL then paddr must be set to 0.
* If vaddr is non-NULL, and paddr is zero, SPDK derives the physical
* address for the NVMe device, in this case the memory must be registered.
* If a paddr value is non-zero, SPDK uses the vaddr and paddr as passed
* SPDK assumes that the memory passed is both virtually and physically
* contiguous.
* If these fields are used, SPDK will NOT impose any restriction
* on the number of elements in the queues.
* The buffer sizes are in number of bytes, and are used to confirm
* that the buffers are large enough to contain the appropriate queue.
* These fields are only used by PCIe attached NVMe devices. They
* are presently ignored for other transports.
*/
struct {
struct spdk_nvme_cmd *vaddr;
uint64_t paddr;
uint64_t buffer_size;
} sq;
struct {
struct spdk_nvme_cpl *vaddr;
uint64_t paddr;
uint64_t buffer_size;
} cq;
/**
* This flag indicates to the alloc_io_qpair function that it should not perform
* the connect portion on this qpair. This allows the user to add the qpair to a
* poll group and then connect it later.
*/
bool create_only;
};
/**
* Get the default options for I/O qpair creation for a specific NVMe controller.
*
* \param ctrlr NVMe controller to retrieve the defaults from.
* \param[out] opts Will be filled with the default options for
* spdk_nvme_ctrlr_alloc_io_qpair().
* \param opts_size Must be set to sizeof(struct spdk_nvme_io_qpair_opts).
*/
void spdk_nvme_ctrlr_get_default_io_qpair_opts(struct spdk_nvme_ctrlr *ctrlr,
struct spdk_nvme_io_qpair_opts *opts,
size_t opts_size);
/**
* Allocate an I/O queue pair (submission and completion queue).
*
* This function by default also performs any connection activities required for
* a newly created qpair. To avoid that behavior, the user should set the create_only
* flag in the opts structure to true.
*
* Each queue pair should only be used from a single thread at a time (mutual
* exclusion must be enforced by the user).
*
* \param ctrlr NVMe controller for which to allocate the I/O queue pair.
* \param opts I/O qpair creation options, or NULL to use the defaults as returned
* by spdk_nvme_ctrlr_get_default_io_qpair_opts().
* \param opts_size Must be set to sizeof(struct spdk_nvme_io_qpair_opts), or 0
* if opts is NULL.
*
* \return a pointer to the allocated I/O queue pair.
*/
struct spdk_nvme_qpair *spdk_nvme_ctrlr_alloc_io_qpair(struct spdk_nvme_ctrlr *ctrlr,
const struct spdk_nvme_io_qpair_opts *opts,
size_t opts_size);
/**
* Connect a newly created I/O qpair.
*
* This function does any connection activities required for a newly created qpair.
* It should be called after spdk_nvme_ctrlr_alloc_io_qpair has been called with the
* create_only flag set to true in the spdk_nvme_io_qpair_opts structure.
*
* This call will fail if performed on a qpair that is already connected.
* For reconnecting qpairs, see spdk_nvme_ctrlr_reconnect_io_qpair.
*
* For fabrics like TCP and RDMA, this function actually sends the commands over the wire
* that connect the qpair. For PCIe, this function performs some internal state machine operations.
*
* \param ctrlr NVMe controller for which to allocate the I/O queue pair.
* \param qpair Opaque handle to the qpair to connect.
*
* return 0 on success or negated errno on failure. Specifically -EISCONN if the qpair is already connected.
*
*/
int spdk_nvme_ctrlr_connect_io_qpair(struct spdk_nvme_ctrlr *ctrlr, struct spdk_nvme_qpair *qpair);
/**
* Disconnect the given I/O qpair.
*
* This function must be called from the same thread as spdk_nvme_qpair_process_completions
* and the spdk_nvme_ns_cmd_* functions.
*
* After disconnect, calling spdk_nvme_qpair_process_completions or one of the
* spdk_nvme_ns_cmd* on a qpair will result in a return value of -ENXIO. A
* disconnected qpair may be reconnected with either the spdk_nvme_ctrlr_connect_io_qpair
* or spdk_nvme_ctrlr_reconnect_io_qpair APIs.
*
* \param qpair The qpair to disconnect.
*/
void spdk_nvme_ctrlr_disconnect_io_qpair(struct spdk_nvme_qpair *qpair);
/**
* Attempt to reconnect the given qpair.
*
* This function is intended to be called on qpairs that have already been connected,
* but have since entered a failed state as indicated by a return value of -ENXIO from
* either spdk_nvme_qpair_process_completions or one of the spdk_nvme_ns_cmd_* functions.
* This function must be called from the same thread as spdk_nvme_qpair_process_completions
* and the spdk_nvme_ns_cmd_* functions.
*
* Calling this function has the same effect as calling spdk_nvme_ctrlr_disconnect_io_qpair
* followed by spdk_nvme_ctrlr_connect_io_qpair.
*
* This function may be called on newly created qpairs, but it does extra checks and attempts
* to disconnect the qpair before connecting it. The recommended API for newly created qpairs
* is spdk_nvme_ctrlr_connect_io_qpair.
*
* \param qpair The qpair to reconnect.
*
* \return 0 on success, or if the qpair was already connected.
* -EAGAIN if the driver was unable to reconnect during this call,
* but the controller is still connected and is either resetting or enabled.
* -ENODEV if the controller is removed. In this case, the controller cannot be recovered
* and the application will have to destroy it and the associated qpairs.
* -ENXIO if the controller is in a failed state but is not yet resetting. In this case,
* the application should call spdk_nvme_ctrlr_reset to reset the entire controller.
*/
int spdk_nvme_ctrlr_reconnect_io_qpair(struct spdk_nvme_qpair *qpair);
/**
* Returns the reason the admin qpair for a given controller is disconnected.
*
* \param ctrlr The controller to check.
*
* \return a valid spdk_nvme_qp_failure_reason.
*/
spdk_nvme_qp_failure_reason spdk_nvme_ctrlr_get_admin_qp_failure_reason(
struct spdk_nvme_ctrlr *ctrlr);
/**
* Free an I/O queue pair that was allocated by spdk_nvme_ctrlr_alloc_io_qpair().
*
* \param qpair I/O queue pair to free.
*
* \return 0 on success, -1 on failure.
*/
int spdk_nvme_ctrlr_free_io_qpair(struct spdk_nvme_qpair *qpair);
/**
* Send the given NVM I/O command, I/O buffers, lists and all to the NVMe controller.
*
* This is a low level interface for submitting I/O commands directly.
*
* This function allows a caller to submit an I/O request that is
* COMPLETELY pre-defined, right down to the "physical" memory buffers.
* It is intended for testing hardware, specifying exact buffer location,
* alignment, and offset. It also allows for specific choice of PRP
* and SGLs.
*
* The driver sets the CID. EVERYTHING else is assumed set by the caller.
* Needless to say, this is potentially extremely dangerous for both the host
* (accidental/malicionus storage usage/corruption), and the device.
* Thus its intent is for very specific hardware testing and environment
* reproduction.
*
* The command is submitted to a qpair allocated by spdk_nvme_ctrlr_alloc_io_qpair().
* The user must ensure that only one thread submits I/O on a given qpair at any
* given time.
*
* This function can only be used on PCIe controllers and qpairs.
*
* \param ctrlr Opaque handle to NVMe controller.
* \param qpair I/O qpair to submit command.
* \param cmd NVM I/O command to submit.
* \param cb_fn Callback function invoked when the I/O command completes.
* \param cb_arg Argument passed to callback function.
*
* \return 0 if successfully submitted, negated errnos on the following error conditions:
* -ENOMEM: The request cannot be allocated.
* -ENXIO: The qpair is failed at the transport level.
*/
int spdk_nvme_ctrlr_io_cmd_raw_no_payload_build(struct spdk_nvme_ctrlr *ctrlr,
struct spdk_nvme_qpair *qpair,
struct spdk_nvme_cmd *cmd,
spdk_nvme_cmd_cb cb_fn, void *cb_arg);
/**
* Send the given NVM I/O command to the NVMe controller.
*
* This is a low level interface for submitting I/O commands directly. Prefer
* the spdk_nvme_ns_cmd_* functions instead. The validity of the command will
* not be checked!
*
* When constructing the nvme_command it is not necessary to fill out the PRP
* list/SGL or the CID. The driver will handle both of those for you.
*
* The command is submitted to a qpair allocated by spdk_nvme_ctrlr_alloc_io_qpair().
* The user must ensure that only one thread submits I/O on a given qpair at any
* given time.
*
* \param ctrlr Opaque handle to NVMe controller.
* \param qpair I/O qpair to submit command.
* \param cmd NVM I/O command to submit.
* \param buf Virtual memory address of a single physically contiguous buffer.
* \param len Size of buffer.
* \param cb_fn Callback function invoked when the I/O command completes.
* \param cb_arg Argument passed to callback function.
*
* \return 0 if successfully submitted, negated errnos on the following error conditions:
* -ENOMEM: The request cannot be allocated.
* -ENXIO: The qpair is failed at the transport level.
* -EFAULT: Invalid address was specified as part of payload. cb_fn is also called
* with error status including dnr=1 in this case.
*/
int spdk_nvme_ctrlr_cmd_io_raw(struct spdk_nvme_ctrlr *ctrlr,
struct spdk_nvme_qpair *qpair,
struct spdk_nvme_cmd *cmd,
void *buf, uint32_t len,
spdk_nvme_cmd_cb cb_fn, void *cb_arg);
/**
* Send the given NVM I/O command with metadata to the NVMe controller.
*
* This is a low level interface for submitting I/O commands directly. Prefer
* the spdk_nvme_ns_cmd_* functions instead. The validity of the command will
* not be checked!
*
* When constructing the nvme_command it is not necessary to fill out the PRP
* list/SGL or the CID. The driver will handle both of those for you.
*
* The command is submitted to a qpair allocated by spdk_nvme_ctrlr_alloc_io_qpair().
* The user must ensure that only one thread submits I/O on a given qpair at any
* given time.
*
* \param ctrlr Opaque handle to NVMe controller.
* \param qpair I/O qpair to submit command.
* \param cmd NVM I/O command to submit.
* \param buf Virtual memory address of a single physically contiguous buffer.
* \param len Size of buffer.
* \param md_buf Virtual memory address of a single physically contiguous metadata
* buffer.
* \param cb_fn Callback function invoked when the I/O command completes.
* \param cb_arg Argument passed to callback function.
*
* \return 0 if successfully submitted, negated errnos on the following error conditions:
* -ENOMEM: The request cannot be allocated.
* -ENXIO: The qpair is failed at the transport level.
* -EFAULT: Invalid address was specified as part of payload. cb_fn is also called
* with error status including dnr=1 in this case.
*/
int spdk_nvme_ctrlr_cmd_io_raw_with_md(struct spdk_nvme_ctrlr *ctrlr,
struct spdk_nvme_qpair *qpair,
struct spdk_nvme_cmd *cmd,
void *buf, uint32_t len, void *md_buf,
spdk_nvme_cmd_cb cb_fn, void *cb_arg);
/**
* Process any outstanding completions for I/O submitted on a queue pair.
*
* This call is non-blocking, i.e. it only processes completions that are ready
* at the time of this function call. It does not wait for outstanding commands
* to finish.
*
* For each completed command, the request's callback function will be called if
* specified as non-NULL when the request was submitted.
*
* The caller must ensure that each queue pair is only used from one thread at a
* time.
*
* This function may be called at any point while the controller is attached to
* the SPDK NVMe driver.
*
* \sa spdk_nvme_cmd_cb
*
* \param qpair Queue pair to check for completions.
* \param max_completions Limit the number of completions to be processed in one
* call, or 0 for unlimited.
*
* \return number of completions processed (may be 0) or negated on error. -ENXIO
* in the special case that the qpair is failed at the transport layer.
*/
int32_t spdk_nvme_qpair_process_completions(struct spdk_nvme_qpair *qpair,
uint32_t max_completions);
/**
* Returns the reason the qpair is disconnected.
*
* \param qpair The qpair to check.
*
* \return a valid spdk_nvme_qp_failure_reason.
*/
spdk_nvme_qp_failure_reason spdk_nvme_qpair_get_failure_reason(struct spdk_nvme_qpair *qpair);
/**
* Send the given admin command to the NVMe controller.
*
* This is a low level interface for submitting admin commands directly. Prefer
* the spdk_nvme_ctrlr_cmd_* functions instead. The validity of the command will
* not be checked!
*
* When constructing the nvme_command it is not necessary to fill out the PRP
* list/SGL or the CID. The driver will handle both of those for you.
*
* This function is thread safe and can be called at any point while the controller
* is attached to the SPDK NVMe driver.
*
* Call spdk_nvme_ctrlr_process_admin_completions() to poll for completion
* of commands submitted through this function.
*
* \param ctrlr Opaque handle to NVMe controller.
* \param cmd NVM admin command to submit.
* \param buf Virtual memory address of a single physically contiguous buffer.
* \param len Size of buffer.
* \param cb_fn Callback function invoked when the admin command completes.
* \param cb_arg Argument passed to callback function.
*
* \return 0 if successfully submitted, negated errno if resources could not be
* allocated for this request, -ENXIO if the admin qpair is failed at the transport layer.
*/
int spdk_nvme_ctrlr_cmd_admin_raw(struct spdk_nvme_ctrlr *ctrlr,
struct spdk_nvme_cmd *cmd,
void *buf, uint32_t len,
spdk_nvme_cmd_cb cb_fn, void *cb_arg);
/**
* Process any outstanding completions for admin commands.
*
* This will process completions for admin commands submitted on any thread.
*
* This call is non-blocking, i.e. it only processes completions that are ready
* at the time of this function call. It does not wait for outstanding commands
* to finish.
*
* This function is thread safe and can be called at any point while the controller
* is attached to the SPDK NVMe driver.
*
* \param ctrlr Opaque handle to NVMe controller.
*
* \return number of completions processed (may be 0) or negated on error. -ENXIO
* in the special case that the qpair is failed at the transport layer.
*/
int32_t spdk_nvme_ctrlr_process_admin_completions(struct spdk_nvme_ctrlr *ctrlr);
/**
* Opaque handle to a namespace. Obtained by calling spdk_nvme_ctrlr_get_ns().
*/
struct spdk_nvme_ns;
/**
* Get a handle to a namespace for the given controller.
*
* Namespaces are numbered from 1 to the total number of namespaces. There will
* never be any gaps in the numbering. The number of namespaces is obtained by
* calling spdk_nvme_ctrlr_get_num_ns().
*
* This function is thread safe and can be called at any point while the controller
* is attached to the SPDK NVMe driver.
*
* \param ctrlr Opaque handle to NVMe controller.
* \param ns_id Namespace id.
*
* \return a pointer to the namespace.
*/
struct spdk_nvme_ns *spdk_nvme_ctrlr_get_ns(struct spdk_nvme_ctrlr *ctrlr, uint32_t ns_id);
/**
* Get a specific log page from the NVMe controller.
*
* This function is thread safe and can be called at any point while the controller
* is attached to the SPDK NVMe driver.
*
* Call spdk_nvme_ctrlr_process_admin_completions() to poll for completion of
* commands submitted through this function.
*
* \sa spdk_nvme_ctrlr_is_log_page_supported()
*
* \param ctrlr Opaque handle to NVMe controller.
* \param log_page The log page identifier.
* \param nsid Depending on the log page, this may be 0, a namespace identifier,
* or SPDK_NVME_GLOBAL_NS_TAG.
* \param payload The pointer to the payload buffer.
* \param payload_size The size of payload buffer.
* \param offset Offset in bytes within the log page to start retrieving log page
* data. May only be non-zero if the controller supports extended data for Get Log
* Page as reported in the controller data log page attributes.
* \param cb_fn Callback function to invoke when the log page has been retrieved.
* \param cb_arg Argument to pass to the callback function.
*
* \return 0 if successfully submitted, negated errno if resources could not be
* allocated for this request, -ENXIO if the admin qpair is failed at the transport layer.
*/
int spdk_nvme_ctrlr_cmd_get_log_page(struct spdk_nvme_ctrlr *ctrlr,
uint8_t log_page, uint32_t nsid,
void *payload, uint32_t payload_size,
uint64_t offset,
spdk_nvme_cmd_cb cb_fn, void *cb_arg);
/**
* Get a specific log page from the NVMe controller.
*
* This function is thread safe and can be called at any point while the controller
* is attached to the SPDK NVMe driver.
*
* This function allows specifying extra fields in cdw10 and cdw11 such as
* Retain Asynchronous Event and Log Specific Field.
*
* Call spdk_nvme_ctrlr_process_admin_completions() to poll for completion of
* commands submitted through this function.
*
* \sa spdk_nvme_ctrlr_is_log_page_supported()
*
* \param ctrlr Opaque handle to NVMe controller.
* \param log_page The log page identifier.
* \param nsid Depending on the log page, this may be 0, a namespace identifier,
* or SPDK_NVME_GLOBAL_NS_TAG.
* \param payload The pointer to the payload buffer.
* \param payload_size The size of payload buffer.
* \param offset Offset in bytes within the log page to start retrieving log page
* data. May only be non-zero if the controller supports extended data for Get Log
* Page as reported in the controller data log page attributes.
* \param cdw10 Value to specify for cdw10. Specify 0 for numdl - it will be
* set by this function based on the payload_size parameter. Specify 0 for lid -
* it will be set by this function based on the log_page parameter.
* \param cdw11 Value to specify for cdw11. Specify 0 for numdu - it will be
* set by this function based on the payload_size.
* \param cdw14 Value to specify for cdw14.
* \param cb_fn Callback function to invoke when the log page has been retrieved.
* \param cb_arg Argument to pass to the callback function.
*
* \return 0 if successfully submitted, negated errno if resources could not be
* allocated for this request, -ENXIO if the admin qpair is failed at the transport layer.
*/
int spdk_nvme_ctrlr_cmd_get_log_page_ext(struct spdk_nvme_ctrlr *ctrlr, uint8_t log_page,
uint32_t nsid, void *payload, uint32_t payload_size,
uint64_t offset, uint32_t cdw10, uint32_t cdw11,
uint32_t cdw14, spdk_nvme_cmd_cb cb_fn, void *cb_arg);
/**
* Abort a specific previously-submitted NVMe command.
*
* \sa spdk_nvme_ctrlr_register_timeout_callback()
*
* \param ctrlr NVMe controller to which the command was submitted.
* \param qpair NVMe queue pair to which the command was submitted. For admin
* commands, pass NULL for the qpair.
* \param cid Command ID of the command to abort.
* \param cb_fn Callback function to invoke when the abort has completed.
* \param cb_arg Argument to pass to the callback function.
*
* \return 0 if successfully submitted, negated errno if resources could not be
* allocated for this request, -ENXIO if the admin qpair is failed at the transport layer.
*/
int spdk_nvme_ctrlr_cmd_abort(struct spdk_nvme_ctrlr *ctrlr,
struct spdk_nvme_qpair *qpair,
uint16_t cid,
spdk_nvme_cmd_cb cb_fn,
void *cb_arg);
/**
* Set specific feature for the given NVMe controller.
*
* This function is thread safe and can be called at any point while the controller
* is attached to the SPDK NVMe driver.
*
* Call spdk_nvme_ctrlr_process_admin_completions() to poll for completion of
* commands submitted through this function.
*
* \sa spdk_nvme_ctrlr_cmd_get_feature().
*
* \param ctrlr NVMe controller to manipulate.
* \param feature The feature identifier.
* \param cdw11 as defined by the specification for this command.
* \param cdw12 as defined by the specification for this command.
* \param payload The pointer to the payload buffer.
* \param payload_size The size of payload buffer.
* \param cb_fn Callback function to invoke when the feature has been set.
* \param cb_arg Argument to pass to the callback function.
*
* \return 0 if successfully submitted, negated errno if resources could not be
* allocated for this request, -ENXIO if the admin qpair is failed at the transport layer.
*/
int spdk_nvme_ctrlr_cmd_set_feature(struct spdk_nvme_ctrlr *ctrlr,
uint8_t feature, uint32_t cdw11, uint32_t cdw12,
void *payload, uint32_t payload_size,
spdk_nvme_cmd_cb cb_fn, void *cb_arg);
/**
* Get specific feature from given NVMe controller.
*
* This function is thread safe and can be called at any point while the controller
* is attached to the SPDK NVMe driver.
*
* Call spdk_nvme_ctrlr_process_admin_completions() to poll for completion of
* commands submitted through this function.
*
* \sa spdk_nvme_ctrlr_cmd_set_feature()
*
* \param ctrlr NVMe controller to query.
* \param feature The feature identifier.
* \param cdw11 as defined by the specification for this command.
* \param payload The pointer to the payload buffer.
* \param payload_size The size of payload buffer.
* \param cb_fn Callback function to invoke when the feature has been retrieved.
* \param cb_arg Argument to pass to the callback function.
*
* \return 0 if successfully submitted, -ENOMEM if resources could not be allocated
* for this request, -ENXIO if the admin qpair is failed at the transport layer.
*/
int spdk_nvme_ctrlr_cmd_get_feature(struct spdk_nvme_ctrlr *ctrlr,
uint8_t feature, uint32_t cdw11,
void *payload, uint32_t payload_size,
spdk_nvme_cmd_cb cb_fn, void *cb_arg);
/**
* Get specific feature from given NVMe controller.
*
* \param ctrlr NVMe controller to query.
* \param feature The feature identifier.
* \param cdw11 as defined by the specification for this command.
* \param payload The pointer to the payload buffer.
* \param payload_size The size of payload buffer.
* \param cb_fn Callback function to invoke when the feature has been retrieved.
* \param cb_arg Argument to pass to the callback function.
* \param ns_id The namespace identifier.
*
* \return 0 if successfully submitted, -ENOMEM if resources could not be allocated
* for this request, -ENXIO if the admin qpair is failed at the transport layer.
*
* This function is thread safe and can be called at any point while the controller
* is attached to the SPDK NVMe driver.
*
* Call \ref spdk_nvme_ctrlr_process_admin_completions() to poll for completion
* of commands submitted through this function.
*
* \sa spdk_nvme_ctrlr_cmd_set_feature_ns()
*/
int spdk_nvme_ctrlr_cmd_get_feature_ns(struct spdk_nvme_ctrlr *ctrlr, uint8_t feature,
uint32_t cdw11, void *payload, uint32_t payload_size,
spdk_nvme_cmd_cb cb_fn, void *cb_arg, uint32_t ns_id);
/**
* Set specific feature for the given NVMe controller and namespace ID.
*
* \param ctrlr NVMe controller to manipulate.
* \param feature The feature identifier.
* \param cdw11 as defined by the specification for this command.
* \param cdw12 as defined by the specification for this command.
* \param payload The pointer to the payload buffer.
* \param payload_size The size of payload buffer.
* \param cb_fn Callback function to invoke when the feature has been set.
* \param cb_arg Argument to pass to the callback function.
* \param ns_id The namespace identifier.
*
* \return 0 if successfully submitted, -ENOMEM if resources could not be allocated
* for this request, -ENXIO if the admin qpair is failed at the transport layer.
*
* This function is thread safe and can be called at any point while the controller
* is attached to the SPDK NVMe driver.
*
* Call \ref spdk_nvme_ctrlr_process_admin_completions() to poll for completion
* of commands submitted through this function.
*
* \sa spdk_nvme_ctrlr_cmd_get_feature_ns()
*/
int spdk_nvme_ctrlr_cmd_set_feature_ns(struct spdk_nvme_ctrlr *ctrlr, uint8_t feature,
uint32_t cdw11, uint32_t cdw12, void *payload,
uint32_t payload_size, spdk_nvme_cmd_cb cb_fn,
void *cb_arg, uint32_t ns_id);
/**
* Receive security protocol data from controller.
*
* This function is thread safe and can be called at any point after spdk_nvme_probe().
*
* \param ctrlr NVMe controller to use for security receive command submission.
* \param secp Security Protocol that is used.
* \param spsp Security Protocol Specific field.
* \param nssf NVMe Security Specific field. Indicate RPMB target when using Security
* Protocol EAh.
* \param payload The pointer to the payload buffer.
* \param payload_size The size of payload buffer.
* \param cb_fn Callback function to invoke when the command has been completed.
* \param cb_arg Argument to pass to the callback function.
*
* \return 0 if successfully submitted, negated errno if resources could not be allocated
* for this request.
*/
int spdk_nvme_ctrlr_cmd_security_receive(struct spdk_nvme_ctrlr *ctrlr, uint8_t secp,
uint16_t spsp, uint8_t nssf, void *payload,
uint32_t payload_size,
spdk_nvme_cmd_cb cb_fn, void *cb_arg);
/**
* Send security protocol data to controller.
*
* This function is thread safe and can be called at any point after spdk_nvme_probe().
*
* \param ctrlr NVMe controller to use for security send command submission.
* \param secp Security Protocol that is used.
* \param spsp Security Protocol Specific field.
* \param nssf NVMe Security Specific field. Indicate RPMB target when using Security
* Protocol EAh.
* \param payload The pointer to the payload buffer.
* \param payload_size The size of payload buffer.
* \param cb_fn Callback function to invoke when the command has been completed.
* \param cb_arg Argument to pass to the callback function.
*
* \return 0 if successfully submitted, negated errno if resources could not be allocated
* for this request.
*/
int spdk_nvme_ctrlr_cmd_security_send(struct spdk_nvme_ctrlr *ctrlr, uint8_t secp,
uint16_t spsp, uint8_t nssf, void *payload,
uint32_t payload_size, spdk_nvme_cmd_cb cb_fn, void *cb_arg);
/**
* Receive security protocol data from controller.
*
* This function is thread safe and can be called at any point after spdk_nvme_probe().
*
* Call spdk_nvme_ctrlr_process_admin_completions() to poll for completion of
* commands submitted through this function.
*
* \param ctrlr NVMe controller to use for security receive command submission.
* \param secp Security Protocol that is used.
* \param spsp Security Protocol Specific field.
* \param nssf NVMe Security Specific field. Indicate RPMB target when using Security
* Protocol EAh.
* \param payload The pointer to the payload buffer.
* \param size The size of payload buffer.
*
* \return 0 if successfully submitted, negated errno if resources could not be allocated
* for this request.
*/
int spdk_nvme_ctrlr_security_receive(struct spdk_nvme_ctrlr *ctrlr, uint8_t secp,
uint16_t spsp, uint8_t nssf, void *payload, size_t size);
/**
* Send security protocol data to controller.
*
* This function is thread safe and can be called at any point after spdk_nvme_probe().
*
* Call spdk_nvme_ctrlr_process_admin_completions() to poll for completion of
* commands submitted through this function.
*
* \param ctrlr NVMe controller to use for security send command submission.
* \param secp Security Protocol that is used.
* \param spsp Security Protocol Specific field.
* \param nssf NVMe Security Specific field. Indicate RPMB target when using Security
* Protocol EAh.
* \param payload The pointer to the payload buffer.
* \param size The size of payload buffer.
*
* \return 0 if successfully submitted, negated errno if resources could not be allocated
* for this request.
*/
int spdk_nvme_ctrlr_security_send(struct spdk_nvme_ctrlr *ctrlr, uint8_t secp,
uint16_t spsp, uint8_t nssf, void *payload, size_t size);
/**
* Get supported flags of the controller.
*
* \param ctrlr NVMe controller to get flags.
*
* \return supported flags of this controller.
*/
uint64_t spdk_nvme_ctrlr_get_flags(struct spdk_nvme_ctrlr *ctrlr);
/**
* Attach the specified namespace to controllers.
*
* This function is thread safe and can be called at any point after spdk_nvme_probe().
*
* Call spdk_nvme_ctrlr_process_admin_completions() to poll for completion of
* commands submitted through this function.
*
* \param ctrlr NVMe controller to use for command submission.
* \param nsid Namespace identifier for namespace to attach.
* \param payload The pointer to the controller list.
*
* \return 0 if successfully submitted, ENOMEM if resources could not be allocated
* for this request.
*/
int spdk_nvme_ctrlr_attach_ns(struct spdk_nvme_ctrlr *ctrlr, uint32_t nsid,
struct spdk_nvme_ctrlr_list *payload);
/**
* Detach the specified namespace from controllers.
*
* This function is thread safe and can be called at any point after spdk_nvme_probe().
*
* Call spdk_nvme_ctrlr_process_admin_completions() to poll for completion of
* commands submitted through this function.
*
* \param ctrlr NVMe controller to use for command submission.
* \param nsid Namespace ID to detach.
* \param payload The pointer to the controller list.
*
* \return 0 if successfully submitted, ENOMEM if resources could not be allocated
* for this request
*/
int spdk_nvme_ctrlr_detach_ns(struct spdk_nvme_ctrlr *ctrlr, uint32_t nsid,
struct spdk_nvme_ctrlr_list *payload);
/**
* Create a namespace.
*
* This function is thread safe and can be called at any point after spdk_nvme_probe().
*
* \param ctrlr NVMe controller to create namespace on.
* \param payload The pointer to the NVMe namespace data.
*
* \return Namespace ID (>= 1) if successfully created, or 0 if the request failed.
*/
uint32_t spdk_nvme_ctrlr_create_ns(struct spdk_nvme_ctrlr *ctrlr,
struct spdk_nvme_ns_data *payload);
/**
* Delete a namespace.
*
* This function is thread safe and can be called at any point after spdk_nvme_probe().
*
* Call spdk_nvme_ctrlr_process_admin_completions() to poll for completion of
* commands submitted through this function.
*
* \param ctrlr NVMe controller to delete namespace from.
* \param nsid The namespace identifier.
*
* \return 0 if successfully submitted, negated errno if resources could not be
* allocated
* for this request
*/
int spdk_nvme_ctrlr_delete_ns(struct spdk_nvme_ctrlr *ctrlr, uint32_t nsid);
/**
* Format NVM.
*
* This function requests a low-level format of the media.
*
* This function is thread safe and can be called at any point after spdk_nvme_probe().
*
* \param ctrlr NVMe controller to format.
* \param nsid The namespace identifier. May be SPDK_NVME_GLOBAL_NS_TAG to format
* all namespaces.
* \param format The format information for the command.
*
* \return 0 if successfully submitted, negated errno if resources could not be
* allocated for this request
*/
int spdk_nvme_ctrlr_format(struct spdk_nvme_ctrlr *ctrlr, uint32_t nsid,
struct spdk_nvme_format *format);
/**
* Download a new firmware image.
*
* This function is thread safe and can be called at any point after spdk_nvme_probe().
*
* \param ctrlr NVMe controller to perform firmware operation on.
* \param payload The data buffer for the firmware image.
* \param size The data size will be downloaded.
* \param slot The slot that the firmware image will be committed to.
* \param commit_action The action to perform when firmware is committed.
* \param completion_status output parameter. Contains the completion status of
* the firmware commit operation.
*
* \return 0 if successfully submitted, ENOMEM if resources could not be allocated
* for this request, -1 if the size is not multiple of 4.
*/
int spdk_nvme_ctrlr_update_firmware(struct spdk_nvme_ctrlr *ctrlr, void *payload, uint32_t size,
int slot, enum spdk_nvme_fw_commit_action commit_action,
struct spdk_nvme_status *completion_status);
/**
* Return virtual address of PCIe NVM I/O registers
*
* This function returns a pointer to the PCIe I/O registers for a controller
* or NULL if unsupported for this transport.
*
* \param ctrlr Controller whose registers are to be accessed.
*
* \return Pointer to virtual address of register bank, or NULL.
*/
volatile struct spdk_nvme_registers *spdk_nvme_ctrlr_get_registers(struct spdk_nvme_ctrlr *ctrlr);
/**
* Reserve the controller memory buffer for data transfer use.
*
* This function reserves the full size of the controller memory buffer
* for use in data transfers. If submission queues or completion queues are
* already placed in the controller memory buffer, this call will fail.
*
* \param ctrlr Controller from which to allocate memory buffer
*
* \return The size of the controller memory buffer on success. Negated errno
* on failure.
*/
int spdk_nvme_ctrlr_reserve_cmb(struct spdk_nvme_ctrlr *ctrlr);
/**
* Map a previously reserved controller memory buffer so that it's data is
* visible from the CPU. This operation is not always possible.
*
* \param ctrlr Controller that contains the memory buffer
* \param size Size of buffer that was mapped.
*
* \return Pointer to controller memory buffer, or NULL on failure.
*/
void *spdk_nvme_ctrlr_map_cmb(struct spdk_nvme_ctrlr *ctrlr, size_t *size);
/**
* Free a controller memory I/O buffer.
*
* \param ctrlr Controller from which to unmap the memory buffer.
*/
void spdk_nvme_ctrlr_unmap_cmb(struct spdk_nvme_ctrlr *ctrlr);
/**
* Get the transport ID for a given NVMe controller.
*
* \param ctrlr Controller to get the transport ID.
* \return Pointer to the controller's transport ID.
*/
const struct spdk_nvme_transport_id *spdk_nvme_ctrlr_get_transport_id(
struct spdk_nvme_ctrlr *ctrlr);
/**
* Opaque handle for a poll group. A poll group is a collection of spdk_nvme_qpair
* objects that are polled for completions as a unit.
*
* Returned by spdk_nvme_poll_group_create().
*/
struct spdk_nvme_poll_group;
/**
* This function alerts the user to disconnected qpairs when calling
* spdk_nvme_poll_group_process_completions.
*/
typedef void (*spdk_nvme_disconnected_qpair_cb)(struct spdk_nvme_qpair *qpair,
void *poll_group_ctx);
/**
* Create a new poll group.
*
* \param ctx A user supplied context that can be retrieved later with spdk_nvme_poll_group_get_ctx
*
* \return Pointer to the new poll group, or NULL on error.
*/
struct spdk_nvme_poll_group *spdk_nvme_poll_group_create(void *ctx);
/**
* Add an spdk_nvme_qpair to a poll group. qpairs may only be added to
* a poll group if they are in the disconnected state; i.e. either they were
* just allocated and not yet connected or they have been disconnected with a call
* to spdk_nvme_ctrlr_disconnect_io_qpair.
*
* \param group The group to which the qpair will be added.
* \param qpair The qpair to add to the poll group.
*
* return 0 on success, -EINVAL if the qpair is not in the disabled state, -ENODEV if the transport
* doesn't exist, -ENOMEM on memory allocation failures, or -EPROTO on a protocol (transport) specific failure.
*/
int spdk_nvme_poll_group_add(struct spdk_nvme_poll_group *group, struct spdk_nvme_qpair *qpair);
/**
* Remove an spdk_nvme_qpair from a poll group.
*
* \param group The group from which to remove the qpair.
* \param qpair The qpair to remove from the poll group.
*
* return 0 on success, -ENOENT if the qpair is not found in the group, or -EPROTO on a protocol (transport) specific failure.
*/
int spdk_nvme_poll_group_remove(struct spdk_nvme_poll_group *group, struct spdk_nvme_qpair *qpair);
/**
* Destroy an empty poll group.
*
* \param group The group to destroy.
*
* return 0 on success, -EBUSY if the poll group is not empty.
*/
int spdk_nvme_poll_group_destroy(struct spdk_nvme_poll_group *group);
/**
* Poll for completions on all qpairs in this poll group.
*
* the disconnected_qpair_cb will be called for all disconnected qpairs in the poll group
* including qpairs which fail within the context of this call.
* The user is responsible for trying to reconnect or destroy those qpairs.
*
* \param group The group on which to poll for completions.
* \param completions_per_qpair The maximum number of completions per qpair.
* \param disconnected_qpair_cb A callback function of type spdk_nvme_disconnected_qpair_cb. Must be non-NULL.
*
* return The number of completions across all qpairs, -EINVAL if no disconnected_qpair_cb is passed, or
* -EIO if the shared completion queue cannot be polled for the RDMA transport.
*/
int64_t spdk_nvme_poll_group_process_completions(struct spdk_nvme_poll_group *group,
uint32_t completions_per_qpair, spdk_nvme_disconnected_qpair_cb disconnected_qpair_cb);
/**
* Retrieve the user context for this specific poll group.
*
* \param group The poll group from which to retrieve the context.
*
* \return A pointer to the user provided poll group context.
*/
void *spdk_nvme_poll_group_get_ctx(struct spdk_nvme_poll_group *group);
/**
* Get the identify namespace data as defined by the NVMe specification.
*
* This function is thread safe and can be called at any point while the controller
* is attached to the SPDK NVMe driver.
*
* \param ns Namespace.
*
* \return a pointer to the namespace data.
*/
const struct spdk_nvme_ns_data *spdk_nvme_ns_get_data(struct spdk_nvme_ns *ns);
/**
* Get the namespace id (index number) from the given namespace handle.
*
* This function is thread safe and can be called at any point while the controller
* is attached to the SPDK NVMe driver.
*
* \param ns Namespace.
*
* \return namespace id.
*/
uint32_t spdk_nvme_ns_get_id(struct spdk_nvme_ns *ns);
/**
* Get the controller with which this namespace is associated.
*
* This function is thread safe and can be called at any point while the controller
* is attached to the SPDK NVMe driver.
*
* \param ns Namespace.
*
* \return a pointer to the controller.
*/
struct spdk_nvme_ctrlr *spdk_nvme_ns_get_ctrlr(struct spdk_nvme_ns *ns);
/**
* Determine whether a namespace is active.
*
* Inactive namespaces cannot be the target of I/O commands.
*
* \param ns Namespace to query.
*
* \return true if active, or false if inactive.
*/
bool spdk_nvme_ns_is_active(struct spdk_nvme_ns *ns);
/**
* Get the maximum transfer size, in bytes, for an I/O sent to the given namespace.
*
* This function is thread safe and can be called at any point while the controller
* is attached to the SPDK NVMe driver.
*
* \param ns Namespace to query.
*
* \return the maximum transfer size in bytes.
*/
uint32_t spdk_nvme_ns_get_max_io_xfer_size(struct spdk_nvme_ns *ns);
/**
* Get the sector size, in bytes, of the given namespace.
*
* This function returns the size of the data sector only. It does not
* include metadata size.
*
* This function is thread safe and can be called at any point while the controller
* is attached to the SPDK NVMe driver.
*
* \param ns Namespace to query.
*
* /return the sector size in bytes.
*/
uint32_t spdk_nvme_ns_get_sector_size(struct spdk_nvme_ns *ns);
/**
* Get the extended sector size, in bytes, of the given namespace.
*
* This function returns the size of the data sector plus metadata.
*
* This function is thread safe and can be called at any point while the controller
* is attached to the SPDK NVMe driver.
*
* \param ns Namespace to query.
*
* /return the extended sector size in bytes.
*/
uint32_t spdk_nvme_ns_get_extended_sector_size(struct spdk_nvme_ns *ns);
/**
* Get the number of sectors for the given namespace.
*
* This function is thread safe and can be called at any point while the controller
* is attached to the SPDK NVMe driver.
*
* \param ns Namespace to query.
*
* \return the number of sectors.
*/
uint64_t spdk_nvme_ns_get_num_sectors(struct spdk_nvme_ns *ns);
/**
* Get the size, in bytes, of the given namespace.
*
* This function is thread safe and can be called at any point while the controller
* is attached to the SPDK NVMe driver.
*
* \param ns Namespace to query.
*
* \return the size of the given namespace in bytes.
*/
uint64_t spdk_nvme_ns_get_size(struct spdk_nvme_ns *ns);
/**
* Get the end-to-end data protection information type of the given namespace.
*
* This function is thread safe and can be called at any point while the controller
* is attached to the SPDK NVMe driver.
*
* \param ns Namespace to query.
*
* \return the end-to-end data protection information type.
*/
enum spdk_nvme_pi_type spdk_nvme_ns_get_pi_type(struct spdk_nvme_ns *ns);
/**
* Get the metadata size, in bytes, of the given namespace.
*
* This function is thread safe and can be called at any point while the controller
* is attached to the SPDK NVMe driver.
*
* \param ns Namespace to query.
*
* \return the metadata size of the given namespace in bytes.
*/
uint32_t spdk_nvme_ns_get_md_size(struct spdk_nvme_ns *ns);
/**
* Check whether if the namespace can support extended LBA when end-to-end data
* protection enabled.
*
* This function is thread safe and can be called at any point while the controller
* is attached to the SPDK NVMe driver.
*
* \param ns Namespace to query.
*
* \return true if the namespace can support extended LBA when end-to-end data
* protection enabled, or false otherwise.
*/
bool spdk_nvme_ns_supports_extended_lba(struct spdk_nvme_ns *ns);
/**
* Check whether if the namespace supports compare operation
*
* This function is thread safe and can be called at any point while the controller
* is attached to the SPDK NVMe driver.
*
* \param ns Namespace to query.
*
* \return true if the namespace supports compare operation, or false otherwise.
*/
bool spdk_nvme_ns_supports_compare(struct spdk_nvme_ns *ns);
/**
* Determine the value returned when reading deallocated blocks.
*
* If deallocated blocks return 0, the deallocate command can be used as a more
* efficient alternative to the write_zeroes command, especially for large requests.
*
* \param ns Namespace.
*
* \return the logical block read value.
*/
enum spdk_nvme_dealloc_logical_block_read_value spdk_nvme_ns_get_dealloc_logical_block_read_value(
struct spdk_nvme_ns *ns);
/**
* Get the optimal I/O boundary, in blocks, for the given namespace.
*
* Read and write commands should not cross the optimal I/O boundary for best
* performance.
*
* \param ns Namespace to query.
*
* \return Optimal granularity of I/O commands, in blocks, or 0 if no optimal
* granularity is reported.
*/
uint32_t spdk_nvme_ns_get_optimal_io_boundary(struct spdk_nvme_ns *ns);
/**
* Get the UUID for the given namespace.
*
* \param ns Namespace to query.
*
* \return a pointer to namespace UUID, or NULL if ns does not have a UUID.
*/
const struct spdk_uuid *spdk_nvme_ns_get_uuid(const struct spdk_nvme_ns *ns);
/**
* \brief Namespace command support flags.
*/
enum spdk_nvme_ns_flags {
SPDK_NVME_NS_DEALLOCATE_SUPPORTED = 0x1, /**< The deallocate command is supported */
SPDK_NVME_NS_FLUSH_SUPPORTED = 0x2, /**< The flush command is supported */
SPDK_NVME_NS_RESERVATION_SUPPORTED = 0x4, /**< The reservation command is supported */
SPDK_NVME_NS_WRITE_ZEROES_SUPPORTED = 0x8, /**< The write zeroes command is supported */
SPDK_NVME_NS_DPS_PI_SUPPORTED = 0x10, /**< The end-to-end data protection is supported */
SPDK_NVME_NS_EXTENDED_LBA_SUPPORTED = 0x20, /**< The extended lba format is supported,
metadata is transferred as a contiguous
part of the logical block that it is associated with */
SPDK_NVME_NS_WRITE_UNCORRECTABLE_SUPPORTED = 0x40, /**< The write uncorrectable command is supported */
SPDK_NVME_NS_COMPARE_SUPPORTED = 0x80, /**< The compare command is supported */
};
/**
* Get the flags for the given namespace.
*
* See spdk_nvme_ns_flags for the possible flags returned.
*
* This function is thread safe and can be called at any point while the controller
* is attached to the SPDK NVMe driver.
*
* \param ns Namespace to query.
*
* \return the flags for the given namespace.
*/
uint32_t spdk_nvme_ns_get_flags(struct spdk_nvme_ns *ns);
/**
* Restart the SGL walk to the specified offset when the command has scattered payloads.
*
* \param cb_arg Argument passed to readv/writev.
* \param offset Offset for SGL.
*/
typedef void (*spdk_nvme_req_reset_sgl_cb)(void *cb_arg, uint32_t offset);
/**
* Fill out *address and *length with the current SGL entry and advance to the next
* entry for the next time the callback is invoked.
*
* The described segment must be physically contiguous.
*
* \param cb_arg Argument passed to readv/writev.
* \param address Virtual address of this segment, a value of UINT64_MAX
* means the segment should be described via Bit Bucket SGL.
* \param length Length of this physical segment.
*/
typedef int (*spdk_nvme_req_next_sge_cb)(void *cb_arg, void **address, uint32_t *length);
/**
* Submit a write I/O to the specified NVMe namespace.
*
* The command is submitted to a qpair allocated by spdk_nvme_ctrlr_alloc_io_qpair().
* The user must ensure that only one thread submits I/O on a given qpair at any
* given time.
*
* \param ns NVMe namespace to submit the write I/O.
* \param qpair I/O queue pair to submit the request.
* \param payload Virtual address pointer to the data payload.
* \param lba Starting LBA to write the data.
* \param lba_count Length (in sectors) for the write operation.
* \param cb_fn Callback function to invoke when the I/O is completed.
* \param cb_arg Argument to pass to the callback function.
* \param io_flags Set flags, defined by the SPDK_NVME_IO_FLAGS_* entries in
* spdk/nvme_spec.h, for this I/O.
*
* \return 0 if successfully submitted, negated errnos on the following error conditions:
* -EINVAL: The request is malformed.
* -ENOMEM: The request cannot be allocated.
* -ENXIO: The qpair is failed at the transport level.
* -EFAULT: Invalid address was specified as part of payload. cb_fn is also called
* with error status including dnr=1 in this case.
*/
int spdk_nvme_ns_cmd_write(struct spdk_nvme_ns *ns, struct spdk_nvme_qpair *qpair, void *payload,
uint64_t lba, uint32_t lba_count, spdk_nvme_cmd_cb cb_fn,
void *cb_arg, uint32_t io_flags);
/**
* Submit a write I/O to the specified NVMe namespace.
*
* The command is submitted to a qpair allocated by spdk_nvme_ctrlr_alloc_io_qpair().
* The user must ensure that only one thread submits I/O on a given qpair at any
* given time.
*
* \param ns NVMe namespace to submit the write I/O.
* \param qpair I/O queue pair to submit the request.
* \param lba Starting LBA to write the data.
* \param lba_count Length (in sectors) for the write operation.
* \param cb_fn Callback function to invoke when the I/O is completed.
* \param cb_arg Argument to pass to the callback function.
* \param io_flags Set flags, defined in nvme_spec.h, for this I/O.
* \param reset_sgl_fn Callback function to reset scattered payload.
* \param next_sge_fn Callback function to iterate each scattered payload memory
* segment.
*
* \return 0 if successfully submitted, negated errnos on the following error conditions:
* -EINVAL: The request is malformed.
* -ENOMEM: The request cannot be allocated.
* -ENXIO: The qpair is failed at the transport level.
* -EFAULT: Invalid address was specified as part of payload. cb_fn is also called
* with error status including dnr=1 in this case.
*/
int spdk_nvme_ns_cmd_writev(struct spdk_nvme_ns *ns, struct spdk_nvme_qpair *qpair,
uint64_t lba, uint32_t lba_count,
spdk_nvme_cmd_cb cb_fn, void *cb_arg, uint32_t io_flags,
spdk_nvme_req_reset_sgl_cb reset_sgl_fn,
spdk_nvme_req_next_sge_cb next_sge_fn);
/**
* Submit a write I/O to the specified NVMe namespace.
*
* The command is submitted to a qpair allocated by spdk_nvme_ctrlr_alloc_io_qpair().
* The user must ensure that only one thread submits I/O on a given qpair at any
* given time.
*
* \param ns NVMe namespace to submit the write I/O
* \param qpair I/O queue pair to submit the request
* \param lba starting LBA to write the data
* \param lba_count length (in sectors) for the write operation
* \param cb_fn callback function to invoke when the I/O is completed
* \param cb_arg argument to pass to the callback function
* \param io_flags set flags, defined in nvme_spec.h, for this I/O
* \param reset_sgl_fn callback function to reset scattered payload
* \param next_sge_fn callback function to iterate each scattered
* payload memory segment
* \param metadata virtual address pointer to the metadata payload, the length
* of metadata is specified by spdk_nvme_ns_get_md_size()
* \param apptag_mask application tag mask.
* \param apptag application tag to use end-to-end protection information.
*
* \return 0 if successfully submitted, negated errnos on the following error conditions:
* -EINVAL: The request is malformed.
* -ENOMEM: The request cannot be allocated.
* -ENXIO: The qpair is failed at the transport level.
* -EFAULT: Invalid address was specified as part of payload. cb_fn is also called
* with error status including dnr=1 in this case.
*/
int spdk_nvme_ns_cmd_writev_with_md(struct spdk_nvme_ns *ns, struct spdk_nvme_qpair *qpair,
uint64_t lba, uint32_t lba_count,
spdk_nvme_cmd_cb cb_fn, void *cb_arg, uint32_t io_flags,
spdk_nvme_req_reset_sgl_cb reset_sgl_fn,
spdk_nvme_req_next_sge_cb next_sge_fn, void *metadata,
uint16_t apptag_mask, uint16_t apptag);
/**
* Submit a write I/O to the specified NVMe namespace.
*
* The command is submitted to a qpair allocated by spdk_nvme_ctrlr_alloc_io_qpair().
* The user must ensure that only one thread submits I/O on a given qpair at any
* given time.
*
* \param ns NVMe namespace to submit the write I/O.
* \param qpair I/O queue pair to submit the request.
* \param payload Virtual address pointer to the data payload.
* \param metadata Virtual address pointer to the metadata payload, the length
* of metadata is specified by spdk_nvme_ns_get_md_size().
* \param lba Starting LBA to write the data.
* \param lba_count Length (in sectors) for the write operation.
* \param cb_fn Callback function to invoke when the I/O is completed.
* \param cb_arg Argument to pass to the callback function.
* \param io_flags Set flags, defined by the SPDK_NVME_IO_FLAGS_* entries in
* spdk/nvme_spec.h, for this I/O.
* \param apptag_mask Application tag mask.
* \param apptag Application tag to use end-to-end protection information.
*
* \return 0 if successfully submitted, negated errnos on the following error conditions:
* -EINVAL: The request is malformed.
* -ENOMEM: The request cannot be allocated.
* -ENXIO: The qpair is failed at the transport level.
* -EFAULT: Invalid address was specified as part of payload. cb_fn is also called
* with error status including dnr=1 in this case.
*/
int spdk_nvme_ns_cmd_write_with_md(struct spdk_nvme_ns *ns, struct spdk_nvme_qpair *qpair,
void *payload, void *metadata,
uint64_t lba, uint32_t lba_count, spdk_nvme_cmd_cb cb_fn,
void *cb_arg, uint32_t io_flags,
uint16_t apptag_mask, uint16_t apptag);
/**
* Submit a write zeroes I/O to the specified NVMe namespace.
*
* The command is submitted to a qpair allocated by spdk_nvme_ctrlr_alloc_io_qpair().
* The user must ensure that only one thread submits I/O on a given qpair at any
* given time.
*
* \param ns NVMe namespace to submit the write zeroes I/O.
* \param qpair I/O queue pair to submit the request.
* \param lba Starting LBA for this command.
* \param lba_count Length (in sectors) for the write zero operation.
* \param cb_fn Callback function to invoke when the I/O is completed.
* \param cb_arg Argument to pass to the callback function.
* \param io_flags Set flags, defined by the SPDK_NVME_IO_FLAGS_* entries in
* spdk/nvme_spec.h, for this I/O.
*
* \return 0 if successfully submitted, negated errnos on the following error conditions:
* -EINVAL: The request is malformed.
* -ENOMEM: The request cannot be allocated.
* -ENXIO: The qpair is failed at the transport level.
* -EFAULT: Invalid address was specified as part of payload. cb_fn is also called
* with error status including dnr=1 in this case.
*/
int spdk_nvme_ns_cmd_write_zeroes(struct spdk_nvme_ns *ns, struct spdk_nvme_qpair *qpair,
uint64_t lba, uint32_t lba_count,
spdk_nvme_cmd_cb cb_fn, void *cb_arg,
uint32_t io_flags);
/**
* Submit a write uncorrectable I/O to the specified NVMe namespace.
*
* The command is submitted to a qpair allocated by spdk_nvme_ctrlr_alloc_io_qpair().
* The user must ensure that only one thread submits I/O on a given qpair at any
* given time.
*
* \param ns NVMe namespace to submit the write uncorrectable I/O.
* \param qpair I/O queue pair to submit the request.
* \param lba Starting LBA for this command.
* \param lba_count Length (in sectors) for the write uncorrectable operation.
* \param cb_fn Callback function to invoke when the I/O is completed.
* \param cb_arg Argument to pass to the callback function.
*
* \return 0 if successfully submitted, negated errnos on the following error conditions:
* -EINVAL: The request is malformed.
* -ENOMEM: The request cannot be allocated.
* -ENXIO: The qpair is failed at the transport level.
* -EFAULT: Invalid address was specified as part of payload. cb_fn is also called
* with error status including dnr=1 in this case.
*/
int spdk_nvme_ns_cmd_write_uncorrectable(struct spdk_nvme_ns *ns, struct spdk_nvme_qpair *qpair,
uint64_t lba, uint32_t lba_count,
spdk_nvme_cmd_cb cb_fn, void *cb_arg);
/**
* \brief Submits a read I/O to the specified NVMe namespace.
*
* The command is submitted to a qpair allocated by spdk_nvme_ctrlr_alloc_io_qpair().
* The user must ensure that only one thread submits I/O on a given qpair at any
* given time.
*
* \param ns NVMe namespace to submit the read I/O.
* \param qpair I/O queue pair to submit the request.
* \param payload Virtual address pointer to the data payload.
* \param lba Starting LBA to read the data.
* \param lba_count Length (in sectors) for the read operation.
* \param cb_fn Callback function to invoke when the I/O is completed.
* \param cb_arg Argument to pass to the callback function.
* \param io_flags Set flags, defined in nvme_spec.h, for this I/O.
*
* \return 0 if successfully submitted, negated errnos on the following error conditions:
* -EINVAL: The request is malformed.
* -ENOMEM: The request cannot be allocated.
* -ENXIO: The qpair is failed at the transport level.
* -EFAULT: Invalid address was specified as part of payload. cb_fn is also called
* with error status including dnr=1 in this case.
*/
int spdk_nvme_ns_cmd_read(struct spdk_nvme_ns *ns, struct spdk_nvme_qpair *qpair, void *payload,
uint64_t lba, uint32_t lba_count, spdk_nvme_cmd_cb cb_fn,
void *cb_arg, uint32_t io_flags);
/**
* Submit a read I/O to the specified NVMe namespace.
*
* The command is submitted to a qpair allocated by spdk_nvme_ctrlr_alloc_io_qpair().
* The user must ensure that only one thread submits I/O on a given qpair at any
* given time.
*
* \param ns NVMe namespace to submit the read I/O.
* \param qpair I/O queue pair to submit the request.
* \param lba Starting LBA to read the data.
* \param lba_count Length (in sectors) for the read operation.
* \param cb_fn Callback function to invoke when the I/O is completed.
* \param cb_arg Argument to pass to the callback function.
* \param io_flags Set flags, defined in nvme_spec.h, for this I/O.
* \param reset_sgl_fn Callback function to reset scattered payload.
* \param next_sge_fn Callback function to iterate each scattered payload memory
* segment.
*
* \return 0 if successfully submitted, negated errnos on the following error conditions:
* -EINVAL: The request is malformed.
* -ENOMEM: The request cannot be allocated.
* -ENXIO: The qpair is failed at the transport level.
* -EFAULT: Invalid address was specified as part of payload. cb_fn is also called
* with error status including dnr=1 in this case.
*/
int spdk_nvme_ns_cmd_readv(struct spdk_nvme_ns *ns, struct spdk_nvme_qpair *qpair,
uint64_t lba, uint32_t lba_count,
spdk_nvme_cmd_cb cb_fn, void *cb_arg, uint32_t io_flags,
spdk_nvme_req_reset_sgl_cb reset_sgl_fn,
spdk_nvme_req_next_sge_cb next_sge_fn);
/**
* Submit a read I/O to the specified NVMe namespace.
*
* The command is submitted to a qpair allocated by spdk_nvme_ctrlr_alloc_io_qpair().
* The user must ensure that only one thread submits I/O on a given qpair at any given time.
*
* \param ns NVMe namespace to submit the read I/O
* \param qpair I/O queue pair to submit the request
* \param lba starting LBA to read the data
* \param lba_count length (in sectors) for the read operation
* \param cb_fn callback function to invoke when the I/O is completed
* \param cb_arg argument to pass to the callback function
* \param io_flags set flags, defined in nvme_spec.h, for this I/O
* \param reset_sgl_fn callback function to reset scattered payload
* \param next_sge_fn callback function to iterate each scattered
* payload memory segment
* \param metadata virtual address pointer to the metadata payload, the length
* of metadata is specified by spdk_nvme_ns_get_md_size()
* \param apptag_mask application tag mask.
* \param apptag application tag to use end-to-end protection information.
*
* \return 0 if successfully submitted, negated errnos on the following error conditions:
* -EINVAL: The request is malformed.
* -ENOMEM: The request cannot be allocated.
* -ENXIO: The qpair is failed at the transport level.
* -EFAULT: Invalid address was specified as part of payload. cb_fn is also called
* with error status including dnr=1 in this case.
*/
int spdk_nvme_ns_cmd_readv_with_md(struct spdk_nvme_ns *ns, struct spdk_nvme_qpair *qpair,
uint64_t lba, uint32_t lba_count,
spdk_nvme_cmd_cb cb_fn, void *cb_arg, uint32_t io_flags,
spdk_nvme_req_reset_sgl_cb reset_sgl_fn,
spdk_nvme_req_next_sge_cb next_sge_fn, void *metadata,
uint16_t apptag_mask, uint16_t apptag);
/**
* Submits a read I/O to the specified NVMe namespace.
*
* The command is submitted to a qpair allocated by spdk_nvme_ctrlr_alloc_io_qpair().
* The user must ensure that only one thread submits I/O on a given qpair at any
* given time.
*
* \param ns NVMe namespace to submit the read I/O
* \param qpair I/O queue pair to submit the request
* \param payload virtual address pointer to the data payload
* \param metadata virtual address pointer to the metadata payload, the length
* of metadata is specified by spdk_nvme_ns_get_md_size().
* \param lba starting LBA to read the data.
* \param lba_count Length (in sectors) for the read operation.
* \param cb_fn Callback function to invoke when the I/O is completed.
* \param cb_arg Argument to pass to the callback function.
* \param io_flags Set flags, defined in nvme_spec.h, for this I/O.
* \param apptag_mask Application tag mask.
* \param apptag Application tag to use end-to-end protection information.
*
* \return 0 if successfully submitted, negated errnos on the following error conditions:
* -EINVAL: The request is malformed.
* -ENOMEM: The request cannot be allocated.
* -ENXIO: The qpair is failed at the transport level.
* -EFAULT: Invalid address was specified as part of payload. cb_fn is also called
* with error status including dnr=1 in this case.
*/
int spdk_nvme_ns_cmd_read_with_md(struct spdk_nvme_ns *ns, struct spdk_nvme_qpair *qpair,
void *payload, void *metadata,
uint64_t lba, uint32_t lba_count, spdk_nvme_cmd_cb cb_fn,
void *cb_arg, uint32_t io_flags,
uint16_t apptag_mask, uint16_t apptag);
/**
* Submit a data set management request to the specified NVMe namespace.
*
* The command is submitted to a qpair allocated by spdk_nvme_ctrlr_alloc_io_qpair().
* The user must ensure that only one thread submits I/O on a given qpair at any
* given time.
*
* This is a convenience wrapper that will automatically allocate and construct
* the correct data buffers. Therefore, ranges does not need to be allocated from
* pinned memory and can be placed on the stack. If a higher performance, zero-copy
* version of DSM is required, simply build and submit a raw command using
* spdk_nvme_ctrlr_cmd_io_raw().
*
* \param ns NVMe namespace to submit the DSM request
* \param type A bit field constructed from \ref spdk_nvme_dsm_attribute.
* \param qpair I/O queue pair to submit the request
* \param ranges An array of \ref spdk_nvme_dsm_range elements describing the LBAs
* to operate on.
* \param num_ranges The number of elements in the ranges array.
* \param cb_fn Callback function to invoke when the I/O is completed
* \param cb_arg Argument to pass to the callback function
*
* \return 0 if successfully submitted, negated errnos on the following error conditions:
* -ENOMEM: The request cannot be allocated.
* -ENXIO: The qpair is failed at the transport level.
*/
int spdk_nvme_ns_cmd_dataset_management(struct spdk_nvme_ns *ns, struct spdk_nvme_qpair *qpair,
uint32_t type,
const struct spdk_nvme_dsm_range *ranges,
uint16_t num_ranges,
spdk_nvme_cmd_cb cb_fn,
void *cb_arg);
/**
* Submit a flush request to the specified NVMe namespace.
*
* The command is submitted to a qpair allocated by spdk_nvme_ctrlr_alloc_io_qpair().
* The user must ensure that only one thread submits I/O on a given qpair at any
* given time.
*
* \param ns NVMe namespace to submit the flush request.
* \param qpair I/O queue pair to submit the request.
* \param cb_fn Callback function to invoke when the I/O is completed.
* \param cb_arg Argument to pass to the callback function.
*
* \return 0 if successfully submitted, negated errnos on the following error conditions:
* -ENOMEM: The request cannot be allocated.
* -ENXIO: The qpair is failed at the transport level.
*/
int spdk_nvme_ns_cmd_flush(struct spdk_nvme_ns *ns, struct spdk_nvme_qpair *qpair,
spdk_nvme_cmd_cb cb_fn, void *cb_arg);
/**
* Submit a reservation register to the specified NVMe namespace.
*
* The command is submitted to a qpair allocated by spdk_nvme_ctrlr_alloc_io_qpair().
* The user must ensure that only one thread submits I/O on a given qpair at any
* given time.
*
* \param ns NVMe namespace to submit the reservation register request.
* \param qpair I/O queue pair to submit the request.
* \param payload Virtual address pointer to the reservation register data.
* \param ignore_key '1' the current reservation key check is disabled.
* \param action Specifies the registration action.
* \param cptpl Change the Persist Through Power Loss state.
* \param cb_fn Callback function to invoke when the I/O is completed.
* \param cb_arg Argument to pass to the callback function.
*
* \return 0 if successfully submitted, negated errnos on the following error conditions:
* -ENOMEM: The request cannot be allocated.
* -ENXIO: The qpair is failed at the transport level.
* -EFAULT: Invalid address was specified as part of payload. cb_fn is also called
* with error status including dnr=1 in this case.
*/
int spdk_nvme_ns_cmd_reservation_register(struct spdk_nvme_ns *ns,
struct spdk_nvme_qpair *qpair,
struct spdk_nvme_reservation_register_data *payload,
bool ignore_key,
enum spdk_nvme_reservation_register_action action,
enum spdk_nvme_reservation_register_cptpl cptpl,
spdk_nvme_cmd_cb cb_fn, void *cb_arg);
/**
* Submits a reservation release to the specified NVMe namespace.
*
* The command is submitted to a qpair allocated by spdk_nvme_ctrlr_alloc_io_qpair().
* The user must ensure that only one thread submits I/O on a given qpair at any
* given time.
*
* \param ns NVMe namespace to submit the reservation release request.
* \param qpair I/O queue pair to submit the request.
* \param payload Virtual address pointer to current reservation key.
* \param ignore_key '1' the current reservation key check is disabled.
* \param action Specifies the reservation release action.
* \param type Reservation type for the namespace.
* \param cb_fn Callback function to invoke when the I/O is completed.
* \param cb_arg Argument to pass to the callback function.
*
* \return 0 if successfully submitted, negated errnos on the following error conditions:
* -ENOMEM: The request cannot be allocated.
* -ENXIO: The qpair is failed at the transport level.
* -EFAULT: Invalid address was specified as part of payload. cb_fn is also called
* with error status including dnr=1 in this case.
*/
int spdk_nvme_ns_cmd_reservation_release(struct spdk_nvme_ns *ns,
struct spdk_nvme_qpair *qpair,
struct spdk_nvme_reservation_key_data *payload,
bool ignore_key,
enum spdk_nvme_reservation_release_action action,
enum spdk_nvme_reservation_type type,
spdk_nvme_cmd_cb cb_fn, void *cb_arg);
/**
* Submits a reservation acquire to the specified NVMe namespace.
*
* The command is submitted to a qpair allocated by spdk_nvme_ctrlr_alloc_io_qpair().
* The user must ensure that only one thread submits I/O on a given qpair at any
* given time.
*
* \param ns NVMe namespace to submit the reservation acquire request.
* \param qpair I/O queue pair to submit the request.
* \param payload Virtual address pointer to reservation acquire data.
* \param ignore_key '1' the current reservation key check is disabled.
* \param action Specifies the reservation acquire action.
* \param type Reservation type for the namespace.
* \param cb_fn Callback function to invoke when the I/O is completed.
* \param cb_arg Argument to pass to the callback function.
*
* \return 0 if successfully submitted, negated errnos on the following error conditions:
* -ENOMEM: The request cannot be allocated.
* -ENXIO: The qpair is failed at the transport level.
* -EFAULT: Invalid address was specified as part of payload. cb_fn is also called
* with error status including dnr=1 in this case.
*/
int spdk_nvme_ns_cmd_reservation_acquire(struct spdk_nvme_ns *ns,
struct spdk_nvme_qpair *qpair,
struct spdk_nvme_reservation_acquire_data *payload,
bool ignore_key,
enum spdk_nvme_reservation_acquire_action action,
enum spdk_nvme_reservation_type type,
spdk_nvme_cmd_cb cb_fn, void *cb_arg);
/**
* Submit a reservation report to the specified NVMe namespace.
*
* The command is submitted to a qpair allocated by spdk_nvme_ctrlr_alloc_io_qpair().
* The user must ensure that only one thread submits I/O on a given qpair at any
* given time.
*
* \param ns NVMe namespace to submit the reservation report request.
* \param qpair I/O queue pair to submit the request.
* \param payload Virtual address pointer for reservation status data.
* \param len Length bytes for reservation status data structure.
* \param cb_fn Callback function to invoke when the I/O is completed.
* \param cb_arg Argument to pass to the callback function.
*
* \return 0 if successfully submitted, negated errnos on the following error conditions:
* -ENOMEM: The request cannot be allocated.
* -ENXIO: The qpair is failed at the transport level.
* -EFAULT: Invalid address was specified as part of payload. cb_fn is also called
* with error status including dnr=1 in this case.
*/
int spdk_nvme_ns_cmd_reservation_report(struct spdk_nvme_ns *ns,
struct spdk_nvme_qpair *qpair,
void *payload, uint32_t len,
spdk_nvme_cmd_cb cb_fn, void *cb_arg);
/**
* Submit a compare I/O to the specified NVMe namespace.
*
* The command is submitted to a qpair allocated by spdk_nvme_ctrlr_alloc_io_qpair().
* The user must ensure that only one thread submits I/O on a given qpair at any
* given time.
*
* \param ns NVMe namespace to submit the compare I/O.
* \param qpair I/O queue pair to submit the request.
* \param payload Virtual address pointer to the data payload.
* \param lba Starting LBA to compare the data.
* \param lba_count Length (in sectors) for the compare operation.
* \param cb_fn Callback function to invoke when the I/O is completed.
* \param cb_arg Argument to pass to the callback function.
* \param io_flags Set flags, defined in nvme_spec.h, for this I/O.
*
* \return 0 if successfully submitted, negated errnos on the following error conditions:
* -EINVAL: The request is malformed.
* -ENOMEM: The request cannot be allocated.
* -ENXIO: The qpair is failed at the transport level.
* -EFAULT: Invalid address was specified as part of payload. cb_fn is also called
* with error status including dnr=1 in this case.
*/
int spdk_nvme_ns_cmd_compare(struct spdk_nvme_ns *ns, struct spdk_nvme_qpair *qpair, void *payload,
uint64_t lba, uint32_t lba_count, spdk_nvme_cmd_cb cb_fn,
void *cb_arg, uint32_t io_flags);
/**
* Submit a compare I/O to the specified NVMe namespace.
*
* The command is submitted to a qpair allocated by spdk_nvme_ctrlr_alloc_io_qpair().
* The user must ensure that only one thread submits I/O on a given qpair at any
* given time.
*
* \param ns NVMe namespace to submit the compare I/O.
* \param qpair I/O queue pair to submit the request.
* \param lba Starting LBA to compare the data.
* \param lba_count Length (in sectors) for the compare operation.
* \param cb_fn Callback function to invoke when the I/O is completed.
* \param cb_arg Argument to pass to the callback function.
* \param io_flags Set flags, defined in nvme_spec.h, for this I/O.
* \param reset_sgl_fn Callback function to reset scattered payload.
* \param next_sge_fn Callback function to iterate each scattered payload memory
* segment.
*
* \return 0 if successfully submitted, negated errnos on the following error conditions:
* -EINVAL: The request is malformed.
* -ENOMEM: The request cannot be allocated.
* -ENXIO: The qpair is failed at the transport level.
* -EFAULT: Invalid address was specified as part of payload. cb_fn is also called
* with error status including dnr=1 in this case.
*/
int spdk_nvme_ns_cmd_comparev(struct spdk_nvme_ns *ns, struct spdk_nvme_qpair *qpair,
uint64_t lba, uint32_t lba_count,
spdk_nvme_cmd_cb cb_fn, void *cb_arg, uint32_t io_flags,
spdk_nvme_req_reset_sgl_cb reset_sgl_fn,
spdk_nvme_req_next_sge_cb next_sge_fn);
/**
* Submit a compare I/O to the specified NVMe namespace.
*
* The command is submitted to a qpair allocated by spdk_nvme_ctrlr_alloc_io_qpair().
* The user must ensure that only one thread submits I/O on a given qpair at any
* given time.
*
* \param ns NVMe namespace to submit the compare I/O.
* \param qpair I/O queue pair to submit the request.
* \param lba Starting LBA to compare the data.
* \param lba_count Length (in sectors) for the compare operation.
* \param cb_fn Callback function to invoke when the I/O is completed.
* \param cb_arg Argument to pass to the callback function.
* \param io_flags Set flags, defined in nvme_spec.h, for this I/O.
* \param reset_sgl_fn Callback function to reset scattered payload.
* \param next_sge_fn Callback function to iterate each scattered payload memory
* segment.
* \param metadata Virtual address pointer to the metadata payload, the length
* of metadata is specified by spdk_nvme_ns_get_md_size()
* \param apptag_mask Application tag mask.
* \param apptag Application tag to use end-to-end protection information.
*
* \return 0 if successfully submitted, negated errnos on the following error conditions:
* -EINVAL: The request is malformed.
* -ENOMEM: The request cannot be allocated.
* -ENXIO: The qpair is failed at the transport level.
* -EFAULT: Invalid address was specified as part of payload. cb_fn is also called
* with error status including dnr=1 in this case.
*/
int
spdk_nvme_ns_cmd_comparev_with_md(struct spdk_nvme_ns *ns, struct spdk_nvme_qpair *qpair,
uint64_t lba, uint32_t lba_count,
spdk_nvme_cmd_cb cb_fn, void *cb_arg, uint32_t io_flags,
spdk_nvme_req_reset_sgl_cb reset_sgl_fn,
spdk_nvme_req_next_sge_cb next_sge_fn, void *metadata,
uint16_t apptag_mask, uint16_t apptag);
/**
* Submit a compare I/O to the specified NVMe namespace.
*
* The command is submitted to a qpair allocated by spdk_nvme_ctrlr_alloc_io_qpair().
* The user must ensure that only one thread submits I/O on a given qpair at any
* given time.
*
* \param ns NVMe namespace to submit the compare I/O.
* \param qpair I/O queue pair to submit the request.
* \param payload Virtual address pointer to the data payload.
* \param metadata Virtual address pointer to the metadata payload, the length
* of metadata is specified by spdk_nvme_ns_get_md_size().
* \param lba Starting LBA to compare the data.
* \param lba_count Length (in sectors) for the compare operation.
* \param cb_fn Callback function to invoke when the I/O is completed.
* \param cb_arg Argument to pass to the callback function.
* \param io_flags Set flags, defined in nvme_spec.h, for this I/O.
* \param apptag_mask Application tag mask.
* \param apptag Application tag to use end-to-end protection information.
*
* \return 0 if successfully submitted, negated errnos on the following error conditions:
* -EINVAL: The request is malformed.
* -ENOMEM: The request cannot be allocated.
* -ENXIO: The qpair is failed at the transport level.
* -EFAULT: Invalid address was specified as part of payload. cb_fn is also called
* with error status including dnr=1 in this case.
*/
int spdk_nvme_ns_cmd_compare_with_md(struct spdk_nvme_ns *ns, struct spdk_nvme_qpair *qpair,
void *payload, void *metadata,
uint64_t lba, uint32_t lba_count, spdk_nvme_cmd_cb cb_fn,
void *cb_arg, uint32_t io_flags,
uint16_t apptag_mask, uint16_t apptag);
/**
* \brief Inject an error for the next request with a given opcode.
*
* \param ctrlr NVMe controller.
* \param qpair I/O queue pair to add the error command,
* NULL for Admin queue pair.
* \param opc Opcode for Admin or I/O commands.
* \param do_not_submit True if matching requests should not be submitted
* to the controller, but instead completed manually
* after timeout_in_us has expired. False if matching
* requests should be submitted to the controller and
* have their completion status modified after the
* controller completes the request.
* \param timeout_in_us Wait specified microseconds when do_not_submit is true.
* \param err_count Number of matching requests to inject errors.
* \param sct Status code type.
* \param sc Status code.
*
* \return 0 if successfully enabled, ENOMEM if an error command
* structure cannot be allocated.
*
* The function can be called multiple times to inject errors for different
* commands. If the opcode matches an existing entry, the existing entry
* will be updated with the values specified.
*/
int spdk_nvme_qpair_add_cmd_error_injection(struct spdk_nvme_ctrlr *ctrlr,
struct spdk_nvme_qpair *qpair,
uint8_t opc,
bool do_not_submit,
uint64_t timeout_in_us,
uint32_t err_count,
uint8_t sct, uint8_t sc);
/**
* \brief Clear the specified NVMe command with error status.
*
* \param ctrlr NVMe controller.
* \param qpair I/O queue pair to remove the error command,
* \ NULL for Admin queue pair.
* \param opc Opcode for Admin or I/O commands.
*
* The function will remove specified command in the error list.
*/
void spdk_nvme_qpair_remove_cmd_error_injection(struct spdk_nvme_ctrlr *ctrlr,
struct spdk_nvme_qpair *qpair,
uint8_t opc);
/**
* \brief Given NVMe status, return ASCII string for that error.
*
* \param status Status from NVMe completion queue element.
* \return Returns status as an ASCII string.
*/
const char *spdk_nvme_cpl_get_status_string(const struct spdk_nvme_status *status);
/**
* \brief Prints (SPDK_NOTICELOG) the contents of an NVMe submission queue entry (command).
*
* \param qpair Pointer to the NVMe queue pair - used to determine admin versus I/O queue.
* \param cmd Pointer to the submission queue command to be formatted.
*/
void spdk_nvme_qpair_print_command(struct spdk_nvme_qpair *qpair,
struct spdk_nvme_cmd *cmd);
/**
* \brief Prints (SPDK_NOTICELOG) the contents of an NVMe completion queue entry.
*
* \param qpair Pointer to the NVMe queue pair - presently unused.
* \param cpl Pointer to the completion queue element to be formatted.
*/
void spdk_nvme_qpair_print_completion(struct spdk_nvme_qpair *qpair,
struct spdk_nvme_cpl *cpl);
struct ibv_context;
struct ibv_pd;
struct ibv_mr;
/**
* RDMA Transport Hooks
*/
struct spdk_nvme_rdma_hooks {
/**
* \brief Get an InfiniBand Verbs protection domain.
*
* \param trid the transport id
* \param verbs Infiniband verbs context
*
* \return pd of the nvme ctrlr
*/
struct ibv_pd *(*get_ibv_pd)(const struct spdk_nvme_transport_id *trid,
struct ibv_context *verbs);
/**
* \brief Get an InfiniBand Verbs memory region for a buffer.
*
* \param pd The protection domain returned from get_ibv_pd
* \param buf Memory buffer for which an rkey should be returned.
* \param size size of buf
*
* \return Infiniband remote key (rkey) for this buf
*/
uint64_t (*get_rkey)(struct ibv_pd *pd, void *buf, size_t size);
/**
* \brief Put back keys got from get_rkey.
*
* \param key The Infiniband remote key (rkey) got from get_rkey
*
*/
void (*put_rkey)(uint64_t key);
};
/**
* \brief Set the global hooks for the RDMA transport, if necessary.
*
* This call is optional and must be performed prior to probing for
* any devices. By default, the RDMA transport will use the ibverbs
* library to create protection domains and register memory. This
* is a mechanism to subvert that and use an existing registration.
*
* This function may only be called one time per process.
*
* \param hooks for initializing global hooks
*/
void spdk_nvme_rdma_init_hooks(struct spdk_nvme_rdma_hooks *hooks);
/**
* Get name of cuse device associated with NVMe controller.
*
* \param ctrlr Opaque handle to NVMe controller.
* \param name Buffer of be filled with cuse device name.
* \param size Size of name buffer.
*
* \return 0 on success. Negated errno on the following error conditions:
* -ENODEV: No cuse device registered for the controller.
* -ENSPC: Too small buffer size passed. Value of size pointer changed to the required length.
*/
int spdk_nvme_cuse_get_ctrlr_name(struct spdk_nvme_ctrlr *ctrlr, char *name, size_t *size);
/**
* Get name of cuse device associated with NVMe namespace.
*
* \param ctrlr Opaque handle to NVMe controller.
* \param nsid Namespace id.
* \param name Buffer of be filled with cuse device name.
* \param size Size of name buffer.
*
* \return 0 on success. Negated errno on the following error conditions:
* -ENODEV: No cuse device registered for the namespace.
* -ENSPC: Too small buffer size passed. Value of size pointer changed to the required length.
*/
int spdk_nvme_cuse_get_ns_name(struct spdk_nvme_ctrlr *ctrlr, uint32_t nsid,
char *name, size_t *size);
/**
* Create a character device at the path specified (Experimental)
*
* The character device can handle ioctls and is compatible with a standard
* Linux kernel NVMe device. Tools such as nvme-cli can be used to configure
* SPDK devices through this interface.
*
* The user is expected to be polling the admin qpair for this controller periodically
* for the CUSE device to function.
*
* \param ctrlr Opaque handle to the NVMe controller.
*
* \return 0 on success. Negated errno on failure.
*/
int spdk_nvme_cuse_register(struct spdk_nvme_ctrlr *ctrlr);
/**
* Remove a previously created character device (Experimental)
*
* \param ctrlr Opaque handle to the NVMe controller.
*
* \return 0 on success. Negated errno on failure.
*/
int spdk_nvme_cuse_unregister(struct spdk_nvme_ctrlr *ctrlr);
int spdk_nvme_map_prps(void *prv, struct spdk_nvme_cmd *cmd, struct iovec *iovs,
uint32_t len, size_t mps,
void *(*gpa_to_vva)(void *prv, uint64_t addr, uint64_t len));
/**
* Opaque handle for a transport poll group. Used by the transport function table.
*/
struct spdk_nvme_transport_poll_group;
/**
* Update and populate namespace CUSE devices (Experimental)
*
* \param ctrlr Opaque handle to the NVMe controller.
*
*/
void spdk_nvme_cuse_update_namespaces(struct spdk_nvme_ctrlr *ctrlr);
struct nvme_request;
struct spdk_nvme_transport;
struct spdk_nvme_transport_ops {
char name[SPDK_NVMF_TRSTRING_MAX_LEN + 1];
enum spdk_nvme_transport_type type;
struct spdk_nvme_ctrlr *(*ctrlr_construct)(const struct spdk_nvme_transport_id *trid,
const struct spdk_nvme_ctrlr_opts *opts,
void *devhandle);
int (*ctrlr_scan)(struct spdk_nvme_probe_ctx *probe_ctx, bool direct_connect);
int (*ctrlr_destruct)(struct spdk_nvme_ctrlr *ctrlr);
int (*ctrlr_enable)(struct spdk_nvme_ctrlr *ctrlr);
int (*ctrlr_set_reg_4)(struct spdk_nvme_ctrlr *ctrlr, uint32_t offset, uint32_t value);
int (*ctrlr_set_reg_8)(struct spdk_nvme_ctrlr *ctrlr, uint32_t offset, uint64_t value);
int (*ctrlr_get_reg_4)(struct spdk_nvme_ctrlr *ctrlr, uint32_t offset, uint32_t *value);
int (*ctrlr_get_reg_8)(struct spdk_nvme_ctrlr *ctrlr, uint32_t offset, uint64_t *value);
uint32_t (*ctrlr_get_max_xfer_size)(struct spdk_nvme_ctrlr *ctrlr);
uint16_t (*ctrlr_get_max_sges)(struct spdk_nvme_ctrlr *ctrlr);
int (*ctrlr_reserve_cmb)(struct spdk_nvme_ctrlr *ctrlr);
void *(*ctrlr_map_cmb)(struct spdk_nvme_ctrlr *ctrlr, size_t *size);
int (*ctrlr_unmap_cmb)(struct spdk_nvme_ctrlr *ctrlr);
struct spdk_nvme_qpair *(*ctrlr_create_io_qpair)(struct spdk_nvme_ctrlr *ctrlr, uint16_t qid,
const struct spdk_nvme_io_qpair_opts *opts);
int (*ctrlr_delete_io_qpair)(struct spdk_nvme_ctrlr *ctrlr, struct spdk_nvme_qpair *qpair);
int (*ctrlr_connect_qpair)(struct spdk_nvme_ctrlr *ctrlr, struct spdk_nvme_qpair *qpair);
void (*ctrlr_disconnect_qpair)(struct spdk_nvme_ctrlr *ctrlr, struct spdk_nvme_qpair *qpair);
void (*qpair_abort_reqs)(struct spdk_nvme_qpair *qpair, uint32_t dnr);
int (*qpair_reset)(struct spdk_nvme_qpair *qpair);
int (*qpair_submit_request)(struct spdk_nvme_qpair *qpair, struct nvme_request *req);
int32_t (*qpair_process_completions)(struct spdk_nvme_qpair *qpair, uint32_t max_completions);
void (*admin_qpair_abort_aers)(struct spdk_nvme_qpair *qpair);
struct spdk_nvme_transport_poll_group *(*poll_group_create)(void);
int (*poll_group_add)(struct spdk_nvme_transport_poll_group *tgroup, struct spdk_nvme_qpair *qpair);
int (*poll_group_remove)(struct spdk_nvme_transport_poll_group *tgroup,
struct spdk_nvme_qpair *qpair);
int (*poll_group_connect_qpair)(struct spdk_nvme_qpair *qpair);
int (*poll_group_disconnect_qpair)(struct spdk_nvme_qpair *qpair);
int64_t (*poll_group_process_completions)(struct spdk_nvme_transport_poll_group *tgroup,
uint32_t completions_per_qpair, spdk_nvme_disconnected_qpair_cb disconnected_qpair_cb);
int (*poll_group_destroy)(struct spdk_nvme_transport_poll_group *tgroup);
};
/**
* Register the operations for a given transport type.
*
* This function should be invoked by referencing the macro
* SPDK_NVME_TRANSPORT_REGISTER macro in the transport's .c file.
*
* \param ops The operations associated with an NVMe-oF transport.
*/
void spdk_nvme_transport_register(const struct spdk_nvme_transport_ops *ops);
/*
* Macro used to register new transports.
*/
#define SPDK_NVME_TRANSPORT_REGISTER(name, transport_ops) \
static void __attribute__((constructor)) spdk_nvme_transport_register_##name(void) \
{ \
spdk_nvme_transport_register(transport_ops); \
}\
#ifdef __cplusplus
}
#endif
#endif
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