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diff --git a/doc/rst/ioctl.rst b/doc/rst/ioctl.rst new file mode 100644 index 0000000..4d8af34 --- /dev/null +++ b/doc/rst/ioctl.rst @@ -0,0 +1,5227 @@ +.. _ioctl.h: + +**ioctl.h** + + +Linux NVMe ioctl interface functions + + + +.. c:struct:: nvme_passthru_cmd + + nvme passthrough command structure + +**Definition** + +:: + + struct nvme_passthru_cmd { + __u8 opcode; + __u8 flags; + __u16 rsvd1; + __u32 nsid; + __u32 cdw2; + __u32 cdw3; + __u64 metadata; + __u64 addr; + __u32 metadata_len; + __u32 data_len; + __u32 cdw10; + __u32 cdw11; + __u32 cdw12; + __u32 cdw13; + __u32 cdw14; + __u32 cdw15; + __u32 timeout_ms; + __u32 result; + }; + +**Members** + +``opcode`` + Operation code, see :c:type:`enum nvme_io_opcodes <nvme_io_opcodes>` and :c:type:`enum nvme_admin_opcodes <nvme_admin_opcodes>` + +``flags`` + Not supported: intended for command flags (eg: SGL, FUSE) + +``rsvd1`` + Reserved for future use + +``nsid`` + Namespace Identifier, or Fabrics type + +``cdw2`` + Command Dword 2 (no spec defined use) + +``cdw3`` + Command Dword 3 (no spec defined use) + +``metadata`` + User space address to metadata buffer (NULL if not used) + +``addr`` + User space address to data buffer (NULL if not used) + +``metadata_len`` + Metadata buffer transfer length + +``data_len`` + Data buffer transfer length + +``cdw10`` + Command Dword 10 (command specific) + +``cdw11`` + Command Dword 11 (command specific) + +``cdw12`` + Command Dword 12 (command specific) + +``cdw13`` + Command Dword 13 (command specific) + +``cdw14`` + Command Dword 14 (command specific) + +``cdw15`` + Command Dword 15 (command specific) + +``timeout_ms`` + If non-zero, overrides system default timeout in milliseconds + +``result`` + Set on completion to the command's CQE DWORD 0 controller response + + + + + +.. c:struct:: nvme_passthru_cmd64 + + 64-bit nvme passthrough command structure + +**Definition** + +:: + + struct nvme_passthru_cmd64 { + __u8 opcode; + __u8 flags; + __u16 rsvd1; + __u32 nsid; + __u32 cdw2; + __u32 cdw3; + __u64 metadata; + __u64 addr; + __u32 metadata_len; + __u32 data_len; + __u32 cdw10; + __u32 cdw11; + __u32 cdw12; + __u32 cdw13; + __u32 cdw14; + __u32 cdw15; + __u32 timeout_ms; + __u32 rsvd2; + __u64 result; + }; + +**Members** + +``opcode`` + Operation code, see :c:type:`enum nvme_io_opcodes <nvme_io_opcodes>` and :c:type:`enum nvme_admin_opcodes <nvme_admin_opcodes>` + +``flags`` + Not supported: intended for command flags (eg: SGL, FUSE) + +``rsvd1`` + Reserved for future use + +``nsid`` + Namespace Identifier, or Fabrics type + +``cdw2`` + Command Dword 2 (no spec defined use) + +``cdw3`` + Command Dword 3 (no spec defined use) + +``metadata`` + User space address to metadata buffer (NULL if not used) + +``addr`` + User space address to data buffer (NULL if not used) + +``metadata_len`` + Metadata buffer transfer length + +``data_len`` + Data buffer transfer length + +``cdw10`` + Command Dword 10 (command specific) + +``cdw11`` + Command Dword 11 (command specific) + +``cdw12`` + Command Dword 12 (command specific) + +``cdw13`` + Command Dword 13 (command specific) + +``cdw14`` + Command Dword 14 (command specific) + +``cdw15`` + Command Dword 15 (command specific) + +``timeout_ms`` + If non-zero, overrides system default timeout in milliseconds + +``rsvd2`` + Reserved for future use (and fills an implicit struct pad + +``result`` + Set on completion to the command's CQE DWORD 0-1 controller response + + + + + +.. c:struct:: nvme_uring_cmd + + nvme uring command structure + +**Definition** + +:: + + struct nvme_uring_cmd { + __u8 opcode; + __u8 flags; + __u16 rsvd1; + __u32 nsid; + __u32 cdw2; + __u32 cdw3; + __u64 metadata; + __u64 addr; + __u32 metadata_len; + __u32 data_len; + __u32 cdw10; + __u32 cdw11; + __u32 cdw12; + __u32 cdw13; + __u32 cdw14; + __u32 cdw15; + __u32 timeout_ms; + __u32 rsvd2; + }; + +**Members** + +``opcode`` + Operation code, see :c:type:`enum nvme_io_opcodes <nvme_io_opcodes>` and :c:type:`enum nvme_admin_opcodes <nvme_admin_opcodes>` + +``flags`` + Not supported: intended for command flags (eg: SGL, FUSE) + +``rsvd1`` + Reserved for future use + +``nsid`` + Namespace Identifier, or Fabrics type + +``cdw2`` + Command Dword 2 (no spec defined use) + +``cdw3`` + Command Dword 3 (no spec defined use) + +``metadata`` + User space address to metadata buffer (NULL if not used) + +``addr`` + User space address to data buffer (NULL if not used) + +``metadata_len`` + Metadata buffer transfer length + +``data_len`` + Data buffer transfer length + +``cdw10`` + Command Dword 10 (command specific) + +``cdw11`` + Command Dword 11 (command specific) + +``cdw12`` + Command Dword 12 (command specific) + +``cdw13`` + Command Dword 13 (command specific) + +``cdw14`` + Command Dword 14 (command specific) + +``cdw15`` + Command Dword 15 (command specific) + +``timeout_ms`` + If non-zero, overrides system default timeout in milliseconds + +``rsvd2`` + Reserved for future use (and fills an implicit struct pad + + + +.. c:macro:: sizeof_args + +``sizeof_args (type, member, align)`` + + Helper function used to determine structure sizes + +**Parameters** + +``type`` + Argument structure type + +``member`` + Member inside the type + +``align`` + Alignment information + + +.. c:function:: int nvme_submit_admin_passthru64 (int fd, struct nvme_passthru_cmd64 *cmd, __u64 *result) + + Submit a 64-bit nvme passthrough admin command + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``struct nvme_passthru_cmd64 *cmd`` + The nvme admin command to send + +``__u64 *result`` + Optional field to return the result from the CQE DW0-1 + +**Description** + +Uses NVME_IOCTL_ADMIN64_CMD for the ioctl request. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_admin_passthru64 (int fd, __u8 opcode, __u8 flags, __u16 rsvd, __u32 nsid, __u32 cdw2, __u32 cdw3, __u32 cdw10, __u32 cdw11, __u32 cdw12, __u32 cdw13, __u32 cdw14, __u32 cdw15, __u32 data_len, void *data, __u32 metadata_len, void *metadata, __u32 timeout_ms, __u64 *result) + + Submit a 64-bit nvme passthrough command + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u8 opcode`` + The nvme io command to send + +``__u8 flags`` + NVMe command flags (not used) + +``__u16 rsvd`` + Reserved for future use + +``__u32 nsid`` + Namespace identifier + +``__u32 cdw2`` + Command dword 2 + +``__u32 cdw3`` + Command dword 3 + +``__u32 cdw10`` + Command dword 10 + +``__u32 cdw11`` + Command dword 11 + +``__u32 cdw12`` + Command dword 12 + +``__u32 cdw13`` + Command dword 13 + +``__u32 cdw14`` + Command dword 14 + +``__u32 cdw15`` + Command dword 15 + +``__u32 data_len`` + Length of the data transferred in this command in bytes + +``void *data`` + Pointer to user address of the data buffer + +``__u32 metadata_len`` + Length of metadata transferred in this command + +``void *metadata`` + Pointer to user address of the metadata buffer + +``__u32 timeout_ms`` + How long the kernel waits for the command to complete + +``__u64 *result`` + Optional field to return the result from the CQE dword 0 + +**Description** + +Parameterized form of nvme_submit_admin_passthru64(). This sets up and +submits a :c:type:`struct nvme_passthru_cmd64 <nvme_passthru_cmd64>`. + +Known values for **opcode** are defined in :c:type:`enum nvme_admin_opcode <nvme_admin_opcode>`. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_submit_admin_passthru (int fd, struct nvme_passthru_cmd *cmd, __u32 *result) + + Submit an nvme passthrough admin command + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``struct nvme_passthru_cmd *cmd`` + The nvme admin command to send + +``__u32 *result`` + Optional field to return the result from the CQE DW0 + +**Description** + +Uses NVME_IOCTL_ADMIN_CMD for the ioctl request. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_admin_passthru (int fd, __u8 opcode, __u8 flags, __u16 rsvd, __u32 nsid, __u32 cdw2, __u32 cdw3, __u32 cdw10, __u32 cdw11, __u32 cdw12, __u32 cdw13, __u32 cdw14, __u32 cdw15, __u32 data_len, void *data, __u32 metadata_len, void *metadata, __u32 timeout_ms, __u32 *result) + + Submit an nvme passthrough command + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u8 opcode`` + The nvme io command to send + +``__u8 flags`` + NVMe command flags (not used) + +``__u16 rsvd`` + Reserved for future use + +``__u32 nsid`` + Namespace identifier + +``__u32 cdw2`` + Command dword 2 + +``__u32 cdw3`` + Command dword 3 + +``__u32 cdw10`` + Command dword 10 + +``__u32 cdw11`` + Command dword 11 + +``__u32 cdw12`` + Command dword 12 + +``__u32 cdw13`` + Command dword 13 + +``__u32 cdw14`` + Command dword 14 + +``__u32 cdw15`` + Command dword 15 + +``__u32 data_len`` + Length of the data transferred in this command in bytes + +``void *data`` + Pointer to user address of the data buffer + +``__u32 metadata_len`` + Length of metadata transferred in this command + +``void *metadata`` + Pointer to user address of the metadata buffer + +``__u32 timeout_ms`` + How long the kernel waits for the command to complete + +``__u32 *result`` + Optional field to return the result from the CQE dword 0 + +**Description** + +Parameterized form of nvme_submit_admin_passthru(). This sets up and +submits a :c:type:`struct nvme_passthru_cmd <nvme_passthru_cmd>`. + +Known values for **opcode** are defined in :c:type:`enum nvme_admin_opcode <nvme_admin_opcode>`. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_submit_io_passthru64 (int fd, struct nvme_passthru_cmd64 *cmd, __u64 *result) + + Submit a 64-bit nvme passthrough command + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``struct nvme_passthru_cmd64 *cmd`` + The nvme io command to send + +``__u64 *result`` + Optional field to return the result from the CQE DW0-1 + +**Description** + +Uses NVME_IOCTL_IO64_CMD for the ioctl request. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_io_passthru64 (int fd, __u8 opcode, __u8 flags, __u16 rsvd, __u32 nsid, __u32 cdw2, __u32 cdw3, __u32 cdw10, __u32 cdw11, __u32 cdw12, __u32 cdw13, __u32 cdw14, __u32 cdw15, __u32 data_len, void *data, __u32 metadata_len, void *metadata, __u32 timeout_ms, __u64 *result) + + Submit an nvme io passthrough command + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u8 opcode`` + The nvme io command to send + +``__u8 flags`` + NVMe command flags (not used) + +``__u16 rsvd`` + Reserved for future use + +``__u32 nsid`` + Namespace identifier + +``__u32 cdw2`` + Command dword 2 + +``__u32 cdw3`` + Command dword 3 + +``__u32 cdw10`` + Command dword 10 + +``__u32 cdw11`` + Command dword 11 + +``__u32 cdw12`` + Command dword 12 + +``__u32 cdw13`` + Command dword 13 + +``__u32 cdw14`` + Command dword 14 + +``__u32 cdw15`` + Command dword 15 + +``__u32 data_len`` + Length of the data transferred in this command in bytes + +``void *data`` + Pointer to user address of the data buffer + +``__u32 metadata_len`` + Length of metadata transferred in this command + +``void *metadata`` + Pointer to user address of the metadata buffer + +``__u32 timeout_ms`` + How long the kernel waits for the command to complete + +``__u64 *result`` + Optional field to return the result from the CQE dword 0 + +**Description** + +Parameterized form of nvme_submit_io_passthru64(). This sets up and submits +a :c:type:`struct nvme_passthru_cmd64 <nvme_passthru_cmd64>`. + +Known values for **opcode** are defined in :c:type:`enum nvme_io_opcode <nvme_io_opcode>`. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_submit_io_passthru (int fd, struct nvme_passthru_cmd *cmd, __u32 *result) + + Submit an nvme passthrough command + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``struct nvme_passthru_cmd *cmd`` + The nvme io command to send + +``__u32 *result`` + Optional field to return the result from the CQE DW0 + +**Description** + +Uses NVME_IOCTL_IO_CMD for the ioctl request. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_io_passthru (int fd, __u8 opcode, __u8 flags, __u16 rsvd, __u32 nsid, __u32 cdw2, __u32 cdw3, __u32 cdw10, __u32 cdw11, __u32 cdw12, __u32 cdw13, __u32 cdw14, __u32 cdw15, __u32 data_len, void *data, __u32 metadata_len, void *metadata, __u32 timeout_ms, __u32 *result) + + Submit an nvme io passthrough command + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u8 opcode`` + The nvme io command to send + +``__u8 flags`` + NVMe command flags (not used) + +``__u16 rsvd`` + Reserved for future use + +``__u32 nsid`` + Namespace identifier + +``__u32 cdw2`` + Command dword 2 + +``__u32 cdw3`` + Command dword 3 + +``__u32 cdw10`` + Command dword 10 + +``__u32 cdw11`` + Command dword 11 + +``__u32 cdw12`` + Command dword 12 + +``__u32 cdw13`` + Command dword 13 + +``__u32 cdw14`` + Command dword 14 + +``__u32 cdw15`` + Command dword 15 + +``__u32 data_len`` + Length of the data transferred in this command in bytes + +``void *data`` + Pointer to user address of the data buffer + +``__u32 metadata_len`` + Length of metadata transferred in this command + +``void *metadata`` + Pointer to user address of the metadata buffer + +``__u32 timeout_ms`` + How long the kernel waits for the command to complete + +``__u32 *result`` + Optional field to return the result from the CQE dword 0 + +**Description** + +Parameterized form of nvme_submit_io_passthru(). This sets up and submits +a :c:type:`struct nvme_passthru_cmd <nvme_passthru_cmd>`. + +Known values for **opcode** are defined in :c:type:`enum nvme_io_opcode <nvme_io_opcode>`. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_subsystem_reset (int fd) + + Initiate a subsystem reset + +**Parameters** + +``int fd`` + File descriptor of nvme device + +**Description** + +This should only be sent to controller handles, not to namespaces. + +**Return** + +Zero if a subsystem reset was initiated or -1 with errno set +otherwise. + + +.. c:function:: int nvme_ctrl_reset (int fd) + + Initiate a controller reset + +**Parameters** + +``int fd`` + File descriptor of nvme device + +**Description** + +This should only be sent to controller handles, not to namespaces. + +**Return** + +0 if a reset was initiated or -1 with errno set otherwise. + + +.. c:function:: int nvme_ns_rescan (int fd) + + Initiate a controller rescan + +**Parameters** + +``int fd`` + File descriptor of nvme device + +**Description** + +This should only be sent to controller handles, not to namespaces. + +**Return** + +0 if a rescan was initiated or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_nsid (int fd, __u32 *nsid) + + Retrieve the NSID from a namespace file descriptor + +**Parameters** + +``int fd`` + File descriptor of nvme namespace + +``__u32 *nsid`` + User pointer to namespace id + +**Description** + +This should only be sent to namespace handles, not to controllers. The +kernel's interface returns the nsid as the return value. This is unfortunate +for many architectures that are incapable of allowing distinguishing a +namespace id > 0x80000000 from a negative error number. + +**Return** + +0 if **nsid** was set successfully or -1 with errno set otherwise. + + +.. c:function:: int nvme_identify (struct nvme_identify_args *args) + + Send the NVMe Identify command + +**Parameters** + +``struct nvme_identify_args *args`` + :c:type:`struct nvme_identify_args <nvme_identify_args>` argument structure + +**Description** + +The Identify command returns a data buffer that describes information about +the NVM subsystem, the controller or the namespace(s). + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_identify_ctrl (int fd, struct nvme_id_ctrl *id) + + Retrieves nvme identify controller + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``struct nvme_id_ctrl *id`` + User space destination address to transfer the data, + +**Description** + +Sends nvme identify with CNS value ``NVME_IDENTIFY_CNS_CTRL``. + +See :c:type:`struct nvme_id_ctrl <nvme_id_ctrl>` for details on the data returned. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_identify_ns (int fd, __u32 nsid, struct nvme_id_ns *ns) + + Retrieves nvme identify namespace + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u32 nsid`` + Namespace to identify + +``struct nvme_id_ns *ns`` + User space destination address to transfer the data + +**Description** + +If the Namespace Identifier (NSID) field specifies an active NSID, then the +Identify Namespace data structure is returned to the host for that specified +namespace. + +If the controller supports the Namespace Management capability and the NSID +field is set to ``NVME_NSID_ALL``, then the controller returns an Identify Namespace +data structure that specifies capabilities that are common across namespaces +for this controller. + +See :c:type:`struct nvme_id_ns <nvme_id_ns>` for details on the structure returned. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_identify_allocated_ns (int fd, __u32 nsid, struct nvme_id_ns *ns) + + Same as nvme_identify_ns, but only for allocated namespaces + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u32 nsid`` + Namespace to identify + +``struct nvme_id_ns *ns`` + User space destination address to transfer the data + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_identify_active_ns_list (int fd, __u32 nsid, struct nvme_ns_list *list) + + Retrieves active namespaces id list + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u32 nsid`` + Return namespaces greater than this identifier + +``struct nvme_ns_list *list`` + User space destination address to transfer the data + +**Description** + +A list of 1024 namespace IDs is returned to the host containing NSIDs in +increasing order that are greater than the value specified in the Namespace +Identifier (nsid) field of the command. + +See :c:type:`struct nvme_ns_list <nvme_ns_list>` for the definition of the returned structure. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_identify_allocated_ns_list (int fd, __u32 nsid, struct nvme_ns_list *list) + + Retrieves allocated namespace id list + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u32 nsid`` + Return namespaces greater than this identifier + +``struct nvme_ns_list *list`` + User space destination address to transfer the data + +**Description** + +A list of 1024 namespace IDs is returned to the host containing NSIDs in +increasing order that are greater than the value specified in the Namespace +Identifier (nsid) field of the command. + +See :c:type:`struct nvme_ns_list <nvme_ns_list>` for the definition of the returned structure. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_identify_ctrl_list (int fd, __u16 cntid, struct nvme_ctrl_list *cntlist) + + Retrieves identify controller list + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u16 cntid`` + Starting CNTLID to return in the list + +``struct nvme_ctrl_list *cntlist`` + User space destination address to transfer the data + +**Description** + +Up to 2047 controller identifiers is returned containing a controller +identifier greater than or equal to the controller identifier specified in +**cntid**. + +See :c:type:`struct nvme_ctrl_list <nvme_ctrl_list>` for a definition of the structure returned. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_identify_nsid_ctrl_list (int fd, __u32 nsid, __u16 cntid, struct nvme_ctrl_list *cntlist) + + Retrieves controller list attached to an nsid + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u32 nsid`` + Return controllers that are attached to this nsid + +``__u16 cntid`` + Starting CNTLID to return in the list + +``struct nvme_ctrl_list *cntlist`` + User space destination address to transfer the data + +**Description** + +Up to 2047 controller identifiers are returned containing a controller +identifier greater than or equal to the controller identifier specified in +**cntid** attached to **nsid**. + +See :c:type:`struct nvme_ctrl_list <nvme_ctrl_list>` for a definition of the structure returned. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 + + +.. c:function:: int nvme_identify_ns_descs (int fd, __u32 nsid, struct nvme_ns_id_desc *descs) + + Retrieves namespace descriptor list + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u32 nsid`` + The namespace id to retrieve descriptors + +``struct nvme_ns_id_desc *descs`` + User space destination address to transfer the data + +**Description** + +A list of Namespace Identification Descriptor structures is returned to the +host for the namespace specified in the Namespace Identifier (NSID) field if +it is an active NSID. + +The data returned is in the form of an array of 'struct nvme_ns_id_desc'. + +See :c:type:`struct nvme_ns_id_desc <nvme_ns_id_desc>` for the definition of the returned structure. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_identify_nvmset_list (int fd, __u16 nvmsetid, struct nvme_id_nvmset_list *nvmset) + + Retrieves NVM Set List + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u16 nvmsetid`` + NVM Set Identifier + +``struct nvme_id_nvmset_list *nvmset`` + User space destination address to transfer the data + +**Description** + +Retrieves an NVM Set List, :c:type:`struct nvme_id_nvmset_list <nvme_id_nvmset_list>`. The data structure +is an ordered list by NVM Set Identifier, starting with the first NVM Set +Identifier supported by the NVM subsystem that is equal to or greater than +the NVM Set Identifier. + +See :c:type:`struct nvme_id_nvmset_list <nvme_id_nvmset_list>` for the definition of the returned structure. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_identify_primary_ctrl (int fd, __u16 cntid, struct nvme_primary_ctrl_cap *cap) + + Retrieve NVMe Primary Controller identification + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u16 cntid`` + Return controllers starting at this identifier + +``struct nvme_primary_ctrl_cap *cap`` + User space destination buffer address to transfer the data + +**Description** + +See :c:type:`struct nvme_primary_ctrl_cap <nvme_primary_ctrl_cap>` for the definition of the returned structure, **cap**. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_identify_secondary_ctrl_list (int fd, __u16 cntid, struct nvme_secondary_ctrl_list *sc_list) + + Retrieves secondary controller list + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u16 cntid`` + Return controllers starting at this identifier + +``struct nvme_secondary_ctrl_list *sc_list`` + User space destination address to transfer the data + +**Description** + +A Secondary Controller List is returned to the host for up to 127 secondary +controllers associated with the primary controller processing this command. +The list contains entries for controller identifiers greater than or equal +to the value specified in the Controller Identifier (cntid). + +See :c:type:`struct nvme_secondary_ctrls_list <nvme_secondary_ctrls_list>` for a definition of the returned +structure. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_identify_ns_granularity (int fd, struct nvme_id_ns_granularity_list *gr_list) + + Retrieves namespace granularity identification + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``struct nvme_id_ns_granularity_list *gr_list`` + User space destination address to transfer the data + +**Description** + +If the controller supports reporting of Namespace Granularity, then a +Namespace Granularity List is returned to the host for up to sixteen +namespace granularity descriptors + +See :c:type:`struct nvme_id_ns_granularity_list <nvme_id_ns_granularity_list>` for the definition of the returned +structure. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_identify_uuid (int fd, struct nvme_id_uuid_list *uuid_list) + + Retrieves device's UUIDs + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``struct nvme_id_uuid_list *uuid_list`` + User space destination address to transfer the data + +**Description** + +Each UUID List entry is either 0h, the NVMe Invalid UUID, or a valid UUID. +Valid UUIDs are those which are non-zero and are not the NVMe Invalid UUID. + +See :c:type:`struct nvme_id_uuid_list <nvme_id_uuid_list>` for the definition of the returned structure. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_identify_ns_csi (int fd, __u32 nsid, __u8 uuidx, enum nvme_csi csi, void *data) + + I/O command set specific identify namespace data + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u32 nsid`` + Namespace to identify + +``__u8 uuidx`` + UUID Index for differentiating vendor specific encoding + +``enum nvme_csi csi`` + Command Set Identifier + +``void *data`` + User space destination address to transfer the data + +**Description** + +An I/O Command Set specific Identify Namespace data structure is returned +for the namespace specified in **nsid**. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_identify_ctrl_csi (int fd, enum nvme_csi csi, void *data) + + I/O command set specific Identify Controller data + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``enum nvme_csi csi`` + Command Set Identifier + +``void *data`` + User space destination address to transfer the data + +**Description** + +An I/O Command Set specific Identify Controller data structure is returned +to the host for the controller processing the command. The specific Identify +Controller data structure to be returned is specified by **csi**. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_identify_active_ns_list_csi (int fd, __u32 nsid, enum nvme_csi csi, struct nvme_ns_list *ns_list) + + Active namespace ID list associated with a specified I/O command set + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u32 nsid`` + Return namespaces greater than this identifier + +``enum nvme_csi csi`` + Command Set Identifier + +``struct nvme_ns_list *ns_list`` + User space destination address to transfer the data + +**Description** + +A list of 1024 namespace IDs is returned to the host containing active +NSIDs in increasing order that are greater than the value specified in +the Namespace Identifier (nsid) field of the command and matching the +I/O Command Set specified in the **csi** argument. + +See :c:type:`struct nvme_ns_list <nvme_ns_list>` for the definition of the returned structure. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_identify_allocated_ns_list_csi (int fd, __u32 nsid, enum nvme_csi csi, struct nvme_ns_list *ns_list) + + Allocated namespace ID list associated with a specified I/O command set + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u32 nsid`` + Return namespaces greater than this identifier + +``enum nvme_csi csi`` + Command Set Identifier + +``struct nvme_ns_list *ns_list`` + User space destination address to transfer the data + +**Description** + +A list of 1024 namespace IDs is returned to the host containing allocated +NSIDs in increasing order that are greater than the value specified in +the **nsid** field of the command and matching the I/O Command Set +specified in the **csi** argument. + +See :c:type:`struct nvme_ns_list <nvme_ns_list>` for the definition of the returned structure. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_identify_independent_identify_ns (int fd, __u32 nsid, struct nvme_id_independent_id_ns *ns) + + I/O command set independent Identify namespace data + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u32 nsid`` + Return namespaces greater than this identifier + +``struct nvme_id_independent_id_ns *ns`` + I/O Command Set Independent Identify Namespace data + structure + +**Description** + +The I/O command set independent Identify namespace data structure for +the namespace identified with **ns** is returned to the host. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_identify_ns_csi_user_data_format (int fd, __u16 user_data_format, __u8 uuidx, enum nvme_csi csi, void *data) + + Identify namespace user data format + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u16 user_data_format`` + Return namespaces capability of identifier + +``__u8 uuidx`` + UUID selection, if supported + +``enum nvme_csi csi`` + Command Set Identifier + +``void *data`` + User space destination address to transfer the data + +**Description** + +Identify Namespace data structure for the specified User Data Format +index containing the namespace capabilities for the NVM Command Set. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_identify_iocs_ns_csi_user_data_format (int fd, __u16 user_data_format, __u8 uuidx, enum nvme_csi csi, void *data) + + Identify I/O command set namespace data structure + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u16 user_data_format`` + Return namespaces capability of identifier + +``__u8 uuidx`` + UUID selection, if supported + +``enum nvme_csi csi`` + Command Set Identifier + +``void *data`` + User space destination address to transfer the data + +**Description** + +I/O Command Set specific Identify Namespace data structure for +the specified User Data Format index containing the namespace +capabilities for the I/O Command Set specified in the CSI field. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_nvm_identify_ctrl (int fd, struct nvme_id_ctrl_nvm *id) + + Identify controller data + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``struct nvme_id_ctrl_nvm *id`` + User space destination address to transfer the data + +**Description** + +Return an identify controller data structure to the host of +processing controller. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_identify_domain_list (int fd, __u16 domid, struct nvme_id_domain_list *list) + + Domain list data + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u16 domid`` + Domain ID + +``struct nvme_id_domain_list *list`` + User space destination address to transfer data + +**Description** + +A list of 31 domain IDs is returned to the host containing domain +attributes in increasing order that are greater than the value +specified in the **domid** field. + +See :c:type:`struct nvme_identify_domain_attr <nvme_identify_domain_attr>` for the definition of the +returned structure. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_identify_endurance_group_list (int fd, __u16 endgrp_id, struct nvme_id_endurance_group_list *list) + + Endurance group list data + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u16 endgrp_id`` + Endurance group identifier + +``struct nvme_id_endurance_group_list *list`` + Array of endurance group identifiers + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_identify_iocs (int fd, __u16 cntlid, struct nvme_id_iocs *iocs) + + I/O command set data structure + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u16 cntlid`` + Controller ID + +``struct nvme_id_iocs *iocs`` + User space destination address to transfer the data + +**Description** + +Retrieves list of the controller's supported io command set vectors. See +:c:type:`struct nvme_id_iocs <nvme_id_iocs>`. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_zns_identify_ns (int fd, __u32 nsid, struct nvme_zns_id_ns *data) + + ZNS identify namespace data + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u32 nsid`` + Namespace to identify + +``struct nvme_zns_id_ns *data`` + User space destination address to transfer the data + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_zns_identify_ctrl (int fd, struct nvme_zns_id_ctrl *id) + + ZNS identify controller data + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``struct nvme_zns_id_ctrl *id`` + User space destination address to transfer the data + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_log (struct nvme_get_log_args *args) + + NVMe Admin Get Log command + +**Parameters** + +``struct nvme_get_log_args *args`` + :c:type:`struct nvme_get_log_args <nvme_get_log_args>` argument structure + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_log_page (int fd, __u32 xfer_len, struct nvme_get_log_args *args) + + Get log page data + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u32 xfer_len`` + Max log transfer size per request to split the total. + +``struct nvme_get_log_args *args`` + :c:type:`struct nvme_get_log_args <nvme_get_log_args>` argument structure + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_log_supported_log_pages (int fd, bool rae, struct nvme_supported_log_pages *log) + + Retrieve nmve supported log pages + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``bool rae`` + Retain asynchronous events + +``struct nvme_supported_log_pages *log`` + Array of LID supported and Effects data structures + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_log_error (int fd, unsigned int nr_entries, bool rae, struct nvme_error_log_page *err_log) + + Retrieve nvme error log + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``unsigned int nr_entries`` + Number of error log entries allocated + +``bool rae`` + Retain asynchronous events + +``struct nvme_error_log_page *err_log`` + Array of error logs of size 'entries' + +**Description** + +This log page describes extended error information for a command that +completed with error, or may report an error that is not specific to a +particular command. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_log_smart (int fd, __u32 nsid, bool rae, struct nvme_smart_log *smart_log) + + Retrieve nvme smart log + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u32 nsid`` + Optional namespace identifier + +``bool rae`` + Retain asynchronous events + +``struct nvme_smart_log *smart_log`` + User address to store the smart log + +**Description** + +This log page provides SMART and general health information. The information +provided is over the life of the controller and is retained across power +cycles. To request the controller log page, the namespace identifier +specified is FFFFFFFFh. The controller may also support requesting the log +page on a per namespace basis, as indicated by bit 0 of the LPA field in the +Identify Controller data structure. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_log_fw_slot (int fd, bool rae, struct nvme_firmware_slot *fw_log) + + Retrieves the controller firmware log + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``bool rae`` + Retain asynchronous events + +``struct nvme_firmware_slot *fw_log`` + User address to store the log page + +**Description** + +This log page describes the firmware revision stored in each firmware slot +supported. The firmware revision is indicated as an ASCII string. The log +page also indicates the active slot number. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_log_changed_ns_list (int fd, bool rae, struct nvme_ns_list *ns_log) + + Retrieve namespace changed list + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``bool rae`` + Retain asynchronous events + +``struct nvme_ns_list *ns_log`` + User address to store the log page + +**Description** + +This log page describes namespaces attached to this controller that have +changed since the last time the namespace was identified, been added, or +deleted. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_log_cmd_effects (int fd, enum nvme_csi csi, struct nvme_cmd_effects_log *effects_log) + + Retrieve nvme command effects log + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``enum nvme_csi csi`` + Command Set Identifier + +``struct nvme_cmd_effects_log *effects_log`` + User address to store the effects log + +**Description** + +This log page describes the commands that the controller supports and the +effects of those commands on the state of the NVM subsystem. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_log_device_self_test (int fd, struct nvme_self_test_log *log) + + Retrieve the device self test log + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``struct nvme_self_test_log *log`` + Userspace address of the log payload + +**Description** + +The log page indicates the status of an in progress self test and the +percent complete of that operation, and the results of the previous 20 +self-test operations. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_log_create_telemetry_host (int fd, struct nvme_telemetry_log *log) + + Create host telemetry log + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``struct nvme_telemetry_log *log`` + Userspace address of the log payload + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_log_telemetry_host (int fd, __u64 offset, __u32 len, void *log) + + Get Telemetry Host-Initiated log page + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u64 offset`` + Offset into the telemetry data + +``__u32 len`` + Length of provided user buffer to hold the log data in bytes + +``void *log`` + User address for log page data + +**Description** + +Retrieves the Telemetry Host-Initiated log page at the requested offset +using the previously existing capture. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_log_telemetry_ctrl (int fd, bool rae, __u64 offset, __u32 len, void *log) + + Get Telemetry Controller-Initiated log page + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``bool rae`` + Retain asynchronous events + +``__u64 offset`` + Offset into the telemetry data + +``__u32 len`` + Length of provided user buffer to hold the log data in bytes + +``void *log`` + User address for log page data + +**Description** + +Retrieves the Telemetry Controller-Initiated log page at the requested offset +using the previously existing capture. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_log_endurance_group (int fd, __u16 endgid, struct nvme_endurance_group_log *log) + + Get Endurance Group log + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u16 endgid`` + Starting group identifier to return in the list + +``struct nvme_endurance_group_log *log`` + User address to store the endurance log + +**Description** + +This log page indicates if an Endurance Group Event has occurred for a +particular Endurance Group. If an Endurance Group Event has occurred, the +details of the particular event are included in the Endurance Group +Information log page for that Endurance Group. An asynchronous event is +generated when an entry for an Endurance Group is newly added to this log +page. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_log_predictable_lat_nvmset (int fd, __u16 nvmsetid, struct nvme_nvmset_predictable_lat_log *log) + + Predictable Latency Per NVM Set + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u16 nvmsetid`` + NVM set id + +``struct nvme_nvmset_predictable_lat_log *log`` + User address to store the predictable latency log + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_log_predictable_lat_event (int fd, bool rae, __u32 offset, __u32 len, void *log) + + Retrieve Predictable Latency Event Aggregate Log Page + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``bool rae`` + Retain asynchronous events + +``__u32 offset`` + Offset into the predictable latency event + +``__u32 len`` + Length of provided user buffer to hold the log data in bytes + +``void *log`` + User address for log page data + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_log_fdp_configurations (int fd, __u16 egid, __u32 offset, __u32 len, void *log) + + Get list of Flexible Data Placement configurations + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u16 egid`` + Endurance group identifier + +``__u32 offset`` + Offset into log page + +``__u32 len`` + Length (in bytes) of provided user buffer to hold the log data + +``void *log`` + Log page data buffer + + +.. c:function:: int nvme_get_log_reclaim_unit_handle_usage (int fd, __u16 egid, __u32 offset, __u32 len, void *log) + + Get reclaim unit handle usage + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u16 egid`` + Endurance group identifier + +``__u32 offset`` + Offset into log page + +``__u32 len`` + Length (in bytes) of provided user buffer to hold the log data + +``void *log`` + Log page data buffer + + +.. c:function:: int nvme_get_log_fdp_stats (int fd, __u16 egid, __u32 offset, __u32 len, void *log) + + Get Flexible Data Placement statistics + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u16 egid`` + Endurance group identifier + +``__u32 offset`` + Offset into log page + +``__u32 len`` + Length (in bytes) of provided user buffer to hold the log data + +``void *log`` + Log page data buffer + + +.. c:function:: int nvme_get_log_fdp_events (int fd, __u16 egid, bool host_events, __u32 offset, __u32 len, void *log) + + Get Flexible Data Placement events + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u16 egid`` + Endurance group identifier + +``bool host_events`` + Whether to report host or controller events + +``__u32 offset`` + Offset into log page + +``__u32 len`` + Length (in bytes) of provided user buffer to hold the log data + +``void *log`` + Log page data buffer + + +.. c:function:: int nvme_get_log_ana (int fd, enum nvme_log_ana_lsp lsp, bool rae, __u64 offset, __u32 len, void *log) + + Retrieve Asymmetric Namespace Access log page + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``enum nvme_log_ana_lsp lsp`` + Log specific, see :c:type:`enum nvme_get_log_ana_lsp <nvme_get_log_ana_lsp>` + +``bool rae`` + Retain asynchronous events + +``__u64 offset`` + Offset to the start of the log page + +``__u32 len`` + The allocated length of the log page + +``void *log`` + User address to store the ana log + +**Description** + +This log consists of a header describing the log and descriptors containing +the asymmetric namespace access information for ANA Groups that contain +namespaces that are attached to the controller processing the command. + +See :c:type:`struct nvme_ana_rsp_hdr <nvme_ana_rsp_hdr>` for the definition of the returned structure. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_log_ana_groups (int fd, bool rae, __u32 len, struct nvme_ana_group_desc *log) + + Retrieve Asymmetric Namespace Access groups only log page + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``bool rae`` + Retain asynchronous events + +``__u32 len`` + The allocated length of the log page + +``struct nvme_ana_group_desc *log`` + User address to store the ana group log + +**Description** + +See :c:type:`struct nvme_ana_group_desc <nvme_ana_group_desc>` for the definition of the returned structure. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_log_lba_status (int fd, bool rae, __u64 offset, __u32 len, void *log) + + Retrieve LBA Status + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``bool rae`` + Retain asynchronous events + +``__u64 offset`` + Offset to the start of the log page + +``__u32 len`` + The allocated length of the log page + +``void *log`` + User address to store the log page + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_log_endurance_grp_evt (int fd, bool rae, __u32 offset, __u32 len, void *log) + + Retrieve Rotational Media Information + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``bool rae`` + Retain asynchronous events + +``__u32 offset`` + Offset to the start of the log page + +``__u32 len`` + The allocated length of the log page + +``void *log`` + User address to store the log page + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_log_fid_supported_effects (int fd, bool rae, struct nvme_fid_supported_effects_log *log) + + Retrieve Feature Identifiers Supported and Effects + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``bool rae`` + Retain asynchronous events + +``struct nvme_fid_supported_effects_log *log`` + FID Supported and Effects data structure + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise + + +.. c:function:: int nvme_get_log_mi_cmd_supported_effects (int fd, bool rae, struct nvme_mi_cmd_supported_effects_log *log) + + displays the MI Commands Supported by the controller + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``bool rae`` + Retain asynchronous events + +``struct nvme_mi_cmd_supported_effects_log *log`` + MI Command Supported and Effects data structure + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise + + +.. c:function:: int nvme_get_log_boot_partition (int fd, bool rae, __u8 lsp, __u32 len, struct nvme_boot_partition *part) + + Retrieve Boot Partition + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``bool rae`` + Retain asynchronous events + +``__u8 lsp`` + The log specified field of LID + +``__u32 len`` + The allocated size, minimum + struct nvme_boot_partition + +``struct nvme_boot_partition *part`` + User address to store the log page + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise + + +.. c:function:: int nvme_get_log_phy_rx_eom (int fd, __u8 lsp, __u16 controller, __u32 len, struct nvme_phy_rx_eom_log *log) + + Retrieve Physical Interface Receiver Eye Opening Measurement Log + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u8 lsp`` + Log specific, controls action and measurement quality + +``__u16 controller`` + Target controller ID + +``__u32 len`` + The allocated size, minimum + struct nvme_phy_rx_eom_log + +``struct nvme_phy_rx_eom_log *log`` + User address to store the log page + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise + + +.. c:function:: int nvme_get_log_discovery (int fd, bool rae, __u32 offset, __u32 len, void *log) + + Retrieve Discovery log page + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``bool rae`` + Retain asynchronous events + +``__u32 offset`` + Offset of this log to retrieve + +``__u32 len`` + The allocated size for this portion of the log + +``void *log`` + User address to store the discovery log + +**Description** + +Supported only by fabrics discovery controllers, returning discovery +records. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_log_media_unit_stat (int fd, __u16 domid, struct nvme_media_unit_stat_log *mus) + + Retrieve Media Unit Status + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u16 domid`` + Domain Identifier selection, if supported + +``struct nvme_media_unit_stat_log *mus`` + User address to store the Media Unit statistics log + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise + + +.. c:function:: int nvme_get_log_support_cap_config_list (int fd, __u16 domid, struct nvme_supported_cap_config_list_log *cap) + + Retrieve Supported Capacity Configuration List + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u16 domid`` + Domain Identifier selection, if supported + +``struct nvme_supported_cap_config_list_log *cap`` + User address to store supported capabilities config list + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise + + +.. c:function:: int nvme_get_log_reservation (int fd, bool rae, struct nvme_resv_notification_log *log) + + Retrieve Reservation Notification + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``bool rae`` + Retain asynchronous events + +``struct nvme_resv_notification_log *log`` + User address to store the reservation log + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise + + +.. c:function:: int nvme_get_log_sanitize (int fd, bool rae, struct nvme_sanitize_log_page *log) + + Retrieve Sanitize Status + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``bool rae`` + Retain asynchronous events + +``struct nvme_sanitize_log_page *log`` + User address to store the sanitize log + +**Description** + +The Sanitize Status log page reports sanitize operation time estimates and +information about the most recent sanitize operation. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_log_zns_changed_zones (int fd, __u32 nsid, bool rae, struct nvme_zns_changed_zone_log *log) + + Retrieve list of zones that have changed + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u32 nsid`` + Namespace ID + +``bool rae`` + Retain asynchronous events + +``struct nvme_zns_changed_zone_log *log`` + User address to store the changed zone log + +**Description** + +The list of zones that have changed state due to an exceptional event. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_log_persistent_event (int fd, enum nvme_pevent_log_action action, __u32 size, void *pevent_log) + + Retrieve Persistent Event Log + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``enum nvme_pevent_log_action action`` + Action the controller should take during processing this command + +``__u32 size`` + Size of **pevent_log** + +``void *pevent_log`` + User address to store the persistent event log + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_set_features (struct nvme_set_features_args *args) + + Set a feature attribute + +**Parameters** + +``struct nvme_set_features_args *args`` + :c:type:`struct nvme_set_features_args <nvme_set_features_args>` argument structure + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_set_features_data (int fd, __u8 fid, __u32 nsid, __u32 cdw11, bool save, __u32 data_len, void *data, __u32 *result) + + Helper function for **nvme_set_features\(\)** + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u8 fid`` + Feature identifier + +``__u32 nsid`` + Namespace ID, if applicable + +``__u32 cdw11`` + Value to set the feature to + +``bool save`` + Save value across power states + +``__u32 data_len`` + Length of feature data, if applicable, in bytes + +``void *data`` + User address of feature data, if applicable + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_set_features_simple (int fd, __u8 fid, __u32 nsid, __u32 cdw11, bool save, __u32 *result) + + Helper function for **nvme_set_features\(\)** + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u8 fid`` + Feature identifier + +``__u32 nsid`` + Namespace ID, if applicable + +``__u32 cdw11`` + Value to set the feature to + +``bool save`` + Save value across power states + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_set_features_arbitration (int fd, __u8 ab, __u8 lpw, __u8 mpw, __u8 hpw, bool save, __u32 *result) + + Set arbitration features + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u8 ab`` + Arbitration Burst + +``__u8 lpw`` + Low Priority Weight + +``__u8 mpw`` + Medium Priority Weight + +``__u8 hpw`` + High Priority Weight + +``bool save`` + Save value across power states + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_set_features_power_mgmt (int fd, __u8 ps, __u8 wh, bool save, __u32 *result) + + Set power management feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u8 ps`` + Power State + +``__u8 wh`` + Workload Hint + +``bool save`` + Save value across power states + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_set_features_lba_range (int fd, __u32 nsid, __u8 nr_ranges, bool save, struct nvme_lba_range_type *data, __u32 *result) + + Set LBA range feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u32 nsid`` + Namespace ID + +``__u8 nr_ranges`` + Number of ranges in **data** + +``bool save`` + Save value across power states + +``struct nvme_lba_range_type *data`` + User address of feature data + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_set_features_temp_thresh (int fd, __u16 tmpth, __u8 tmpsel, enum nvme_feat_tmpthresh_thsel thsel, bool save, __u32 *result) + + Set temperature threshold feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u16 tmpth`` + Temperature Threshold + +``__u8 tmpsel`` + Threshold Temperature Select + +``enum nvme_feat_tmpthresh_thsel thsel`` + Threshold Type Select + +``bool save`` + Save value across power states + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_set_features_err_recovery (int fd, __u32 nsid, __u16 tler, bool dulbe, bool save, __u32 *result) + + Set error recovery feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u32 nsid`` + Namespace ID + +``__u16 tler`` + Time-limited error recovery value + +``bool dulbe`` + Deallocated or Unwritten Logical Block Error Enable + +``bool save`` + Save value across power states + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_set_features_volatile_wc (int fd, bool wce, bool save, __u32 *result) + + Set volatile write cache feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``bool wce`` + Write cache enable + +``bool save`` + Save value across power states + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_set_features_irq_coalesce (int fd, __u8 thr, __u8 time, bool save, __u32 *result) + + Set IRQ coalesce feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u8 thr`` + Aggregation Threshold + +``__u8 time`` + Aggregation Time + +``bool save`` + Save value across power states + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_set_features_irq_config (int fd, __u16 iv, bool cd, bool save, __u32 *result) + + Set IRQ config feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u16 iv`` + Interrupt Vector + +``bool cd`` + Coalescing Disable + +``bool save`` + Save value across power states + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_set_features_write_atomic (int fd, bool dn, bool save, __u32 *result) + + Set write atomic feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``bool dn`` + Disable Normal + +``bool save`` + Save value across power states + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_set_features_async_event (int fd, __u32 events, bool save, __u32 *result) + + Set asynchronous event feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u32 events`` + Events to enable + +``bool save`` + Save value across power states + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_set_features_auto_pst (int fd, bool apste, bool save, struct nvme_feat_auto_pst *apst, __u32 *result) + + Set autonomous power state feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``bool apste`` + Autonomous Power State Transition Enable + +``bool save`` + Save value across power states + +``struct nvme_feat_auto_pst *apst`` + Autonomous Power State Transition + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_set_features_timestamp (int fd, bool save, __u64 timestamp) + + Set timestamp feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``bool save`` + Save value across power states + +``__u64 timestamp`` + The current timestamp value to assign to this feature + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_set_features_hctm (int fd, __u16 tmt2, __u16 tmt1, bool save, __u32 *result) + + Set thermal management feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u16 tmt2`` + Thermal Management Temperature 2 + +``__u16 tmt1`` + Thermal Management Temperature 1 + +``bool save`` + Save value across power states + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_set_features_nopsc (int fd, bool noppme, bool save, __u32 *result) + + Set non-operational power state feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``bool noppme`` + Non-Operational Power State Permissive Mode Enable + +``bool save`` + Save value across power states + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_set_features_rrl (int fd, __u8 rrl, __u16 nvmsetid, bool save, __u32 *result) + + Set read recovery level feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u8 rrl`` + Read recovery level setting + +``__u16 nvmsetid`` + NVM set id + +``bool save`` + Save value across power states + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_set_features_plm_config (int fd, bool enable, __u16 nvmsetid, bool save, struct nvme_plm_config *data, __u32 *result) + + Set predictable latency feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``bool enable`` + Predictable Latency Enable + +``__u16 nvmsetid`` + NVM Set Identifier + +``bool save`` + Save value across power states + +``struct nvme_plm_config *data`` + Pointer to structure nvme_plm_config + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_set_features_plm_window (int fd, enum nvme_feat_plm_window_select sel, __u16 nvmsetid, bool save, __u32 *result) + + Set window select feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``enum nvme_feat_plm_window_select sel`` + Window Select + +``__u16 nvmsetid`` + NVM Set Identifier + +``bool save`` + Save value across power states + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_set_features_lba_sts_interval (int fd, __u16 lsiri, __u16 lsipi, bool save, __u32 *result) + + Set LBA status information feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u16 lsiri`` + LBA Status Information Report Interval + +``__u16 lsipi`` + LBA Status Information Poll Interval + +``bool save`` + Save value across power states + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_set_features_host_behavior (int fd, bool save, struct nvme_feat_host_behavior *data) + + Set host behavior feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``bool save`` + Save value across power states + +``struct nvme_feat_host_behavior *data`` + Pointer to structure nvme_feat_host_behavior + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_set_features_sanitize (int fd, bool nodrm, bool save, __u32 *result) + + Set sanitize feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``bool nodrm`` + No-Deallocate Response Mode + +``bool save`` + Save value across power states + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_set_features_endurance_evt_cfg (int fd, __u16 endgid, __u8 egwarn, bool save, __u32 *result) + + Set endurance event config feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u16 endgid`` + Endurance Group Identifier + +``__u8 egwarn`` + Flags to enable warning, see :c:type:`enum nvme_eg_critical_warning_flags <nvme_eg_critical_warning_flags>` + +``bool save`` + Save value across power states + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_set_features_sw_progress (int fd, __u8 pbslc, bool save, __u32 *result) + + Set pre-boot software load count feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u8 pbslc`` + Pre-boot Software Load Count + +``bool save`` + Save value across power states + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_set_features_host_id (int fd, bool exhid, bool save, __u8 *hostid) + + Set enable extended host identifiers feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``bool exhid`` + Enable Extended Host Identifier + +``bool save`` + Save value across power states + +``__u8 *hostid`` + Host ID to set + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_set_features_resv_mask (int fd, __u32 mask, bool save, __u32 *result) + + Set reservation notification mask feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u32 mask`` + Reservation Notification Mask Field + +``bool save`` + Save value across power states + +``__u32 *result`` + The command completion result from CQE dword0 + +**Description** + + +Deprecated: doesn't support specifying a NSID. +Use nvme_set_features_resv_mask2() instead. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_set_features_resv_mask2 (int fd, __u32 nsid, __u32 mask, bool save, __u32 *result) + + Set reservation notification mask feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u32 nsid`` + Namespace ID + +``__u32 mask`` + Reservation Notification Mask Field + +``bool save`` + Save value across power states + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_set_features_resv_persist (int fd, bool ptpl, bool save, __u32 *result) + + Set persist through power loss feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``bool ptpl`` + Persist Through Power Loss + +``bool save`` + Save value across power states + +``__u32 *result`` + The command completion result from CQE dword0 + +**Description** + + +Deprecated: doesn't support specifying a NSID. +Use nvme_set_features_resv_persist2() instead. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_set_features_resv_persist2 (int fd, __u32 nsid, bool ptpl, bool save, __u32 *result) + + Set persist through power loss feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u32 nsid`` + Namespace ID + +``bool ptpl`` + Persist Through Power Loss + +``bool save`` + Save value across power states + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_set_features_write_protect (int fd, enum nvme_feat_nswpcfg_state state, bool save, __u32 *result) + + Set write protect feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``enum nvme_feat_nswpcfg_state state`` + Write Protection State + +``bool save`` + Save value across power states + +``__u32 *result`` + The command completion result from CQE dword0 + +**Description** + + +Deprecated: doesn't support specifying a NSID. +Use nvme_set_features_write_protect2() instead. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_set_features_write_protect2 (int fd, __u32 nsid, enum nvme_feat_nswpcfg_state state, bool save, __u32 *result) + + Set write protect feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u32 nsid`` + Namespace ID + +``enum nvme_feat_nswpcfg_state state`` + Write Protection State + +``bool save`` + Save value across power states + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_set_features_iocs_profile (int fd, __u16 iocsi, bool save) + + Set I/O command set profile feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u16 iocsi`` + I/O Command Set Combination Index + +``bool save`` + Save value across power states + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_features (struct nvme_get_features_args *args) + + Retrieve a feature attribute + +**Parameters** + +``struct nvme_get_features_args *args`` + :c:type:`struct nvme_get_features_args <nvme_get_features_args>` argument structure + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_features_data (int fd, enum nvme_features_id fid, __u32 nsid, __u32 data_len, void *data, __u32 *result) + + Helper function for **nvme_get_features\(\)** + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``enum nvme_features_id fid`` + Feature identifier + +``__u32 nsid`` + Namespace ID, if applicable + +``__u32 data_len`` + Length of feature data, if applicable, in bytes + +``void *data`` + User address of feature data, if applicable + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_features_simple (int fd, enum nvme_features_id fid, __u32 nsid, __u32 *result) + + Helper function for **nvme_get_features\(\)** + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``enum nvme_features_id fid`` + Feature identifier + +``__u32 nsid`` + Namespace ID, if applicable + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_features_arbitration (int fd, enum nvme_get_features_sel sel, __u32 *result) + + Get arbitration feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``enum nvme_get_features_sel sel`` + Select which type of attribute to return, see :c:type:`enum nvme_get_features_sel <nvme_get_features_sel>` + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_features_power_mgmt (int fd, enum nvme_get_features_sel sel, __u32 *result) + + Get power management feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``enum nvme_get_features_sel sel`` + Select which type of attribute to return, see :c:type:`enum nvme_get_features_sel <nvme_get_features_sel>` + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_features_lba_range (int fd, enum nvme_get_features_sel sel, struct nvme_lba_range_type *data, __u32 *result) + + Get LBA range feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``enum nvme_get_features_sel sel`` + Select which type of attribute to return, see :c:type:`enum nvme_get_features_sel <nvme_get_features_sel>` + +``struct nvme_lba_range_type *data`` + User address of feature data, if applicable + +``__u32 *result`` + The command completion result from CQE dword0 + +**Description** + + +Deprecated: doesn't support specifying a NSID. +Use nvme_get_features_lba_range2() instead. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_features_lba_range2 (int fd, enum nvme_get_features_sel sel, __u32 nsid, struct nvme_lba_range_type *data, __u32 *result) + + Get LBA range feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``enum nvme_get_features_sel sel`` + Select which type of attribute to return, see :c:type:`enum nvme_get_features_sel <nvme_get_features_sel>` + +``__u32 nsid`` + Namespace ID + +``struct nvme_lba_range_type *data`` + Buffer to receive LBA Range Type data structure + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_features_temp_thresh (int fd, enum nvme_get_features_sel sel, __u32 *result) + + Get temperature threshold feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``enum nvme_get_features_sel sel`` + Select which type of attribute to return, see :c:type:`enum nvme_get_features_sel <nvme_get_features_sel>` + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_features_err_recovery (int fd, enum nvme_get_features_sel sel, __u32 *result) + + Get error recovery feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``enum nvme_get_features_sel sel`` + Select which type of attribute to return, see :c:type:`enum nvme_get_features_sel <nvme_get_features_sel>` + +``__u32 *result`` + The command completion result from CQE dword0 + +**Description** + + +Deprecated: doesn't support specifying a NSID. +Use nvme_get_features_err_recovery2() instead. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_features_err_recovery2 (int fd, enum nvme_get_features_sel sel, __u32 nsid, __u32 *result) + + Get error recovery feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``enum nvme_get_features_sel sel`` + Select which type of attribute to return, see :c:type:`enum nvme_get_features_sel <nvme_get_features_sel>` + +``__u32 nsid`` + Namespace ID + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_features_volatile_wc (int fd, enum nvme_get_features_sel sel, __u32 *result) + + Get volatile write cache feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``enum nvme_get_features_sel sel`` + Select which type of attribute to return, see :c:type:`enum nvme_get_features_sel <nvme_get_features_sel>` + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_features_num_queues (int fd, enum nvme_get_features_sel sel, __u32 *result) + + Get number of queues feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``enum nvme_get_features_sel sel`` + Select which type of attribute to return, see :c:type:`enum nvme_get_features_sel <nvme_get_features_sel>` + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_features_irq_coalesce (int fd, enum nvme_get_features_sel sel, __u32 *result) + + Get IRQ coalesce feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``enum nvme_get_features_sel sel`` + Select which type of attribute to return, see :c:type:`enum nvme_get_features_sel <nvme_get_features_sel>` + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_features_irq_config (int fd, enum nvme_get_features_sel sel, __u16 iv, __u32 *result) + + Get IRQ config feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``enum nvme_get_features_sel sel`` + Select which type of attribute to return, see :c:type:`enum nvme_get_features_sel <nvme_get_features_sel>` + +``__u16 iv`` + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_features_write_atomic (int fd, enum nvme_get_features_sel sel, __u32 *result) + + Get write atomic feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``enum nvme_get_features_sel sel`` + Select which type of attribute to return, see :c:type:`enum nvme_get_features_sel <nvme_get_features_sel>` + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_features_async_event (int fd, enum nvme_get_features_sel sel, __u32 *result) + + Get asynchronous event feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``enum nvme_get_features_sel sel`` + Select which type of attribute to return, see :c:type:`enum nvme_get_features_sel <nvme_get_features_sel>` + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_features_auto_pst (int fd, enum nvme_get_features_sel sel, struct nvme_feat_auto_pst *apst, __u32 *result) + + Get autonomous power state feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``enum nvme_get_features_sel sel`` + Select which type of attribute to return, see :c:type:`enum nvme_get_features_sel <nvme_get_features_sel>` + +``struct nvme_feat_auto_pst *apst`` + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_features_host_mem_buf (int fd, enum nvme_get_features_sel sel, __u32 *result) + + Get host memory buffer feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``enum nvme_get_features_sel sel`` + Select which type of attribute to return, see :c:type:`enum nvme_get_features_sel <nvme_get_features_sel>` + +``__u32 *result`` + The command completion result from CQE dword0 + +**Description** + + +Deprecated: doesn't fetch the Host Memory Buffer Attributes data structure. +Use nvme_get_features_host_mem_buf2() instead. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_features_host_mem_buf2 (int fd, enum nvme_get_features_sel sel, struct nvme_host_mem_buf_attrs *attrs, __u32 *result) + + Get host memory buffer feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``enum nvme_get_features_sel sel`` + Select which type of attribute to return, see :c:type:`enum nvme_get_features_sel <nvme_get_features_sel>` + +``struct nvme_host_mem_buf_attrs *attrs`` + Buffer for returned Host Memory Buffer Attributes + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_features_timestamp (int fd, enum nvme_get_features_sel sel, struct nvme_timestamp *ts) + + Get timestamp feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``enum nvme_get_features_sel sel`` + Select which type of attribute to return, see :c:type:`enum nvme_get_features_sel <nvme_get_features_sel>` + +``struct nvme_timestamp *ts`` + Current timestamp + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_features_kato (int fd, enum nvme_get_features_sel sel, __u32 *result) + + Get keep alive timeout feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``enum nvme_get_features_sel sel`` + Select which type of attribute to return, see :c:type:`enum nvme_get_features_sel <nvme_get_features_sel>` + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_features_hctm (int fd, enum nvme_get_features_sel sel, __u32 *result) + + Get thermal management feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``enum nvme_get_features_sel sel`` + Select which type of attribute to return, see :c:type:`enum nvme_get_features_sel <nvme_get_features_sel>` + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_features_nopsc (int fd, enum nvme_get_features_sel sel, __u32 *result) + + Get non-operational power state feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``enum nvme_get_features_sel sel`` + Select which type of attribute to return, see :c:type:`enum nvme_get_features_sel <nvme_get_features_sel>` + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_features_rrl (int fd, enum nvme_get_features_sel sel, __u32 *result) + + Get read recovery level feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``enum nvme_get_features_sel sel`` + Select which type of attribute to return, see :c:type:`enum nvme_get_features_sel <nvme_get_features_sel>` + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_features_plm_config (int fd, enum nvme_get_features_sel sel, __u16 nvmsetid, struct nvme_plm_config *data, __u32 *result) + + Get predictable latency feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``enum nvme_get_features_sel sel`` + Select which type of attribute to return, see :c:type:`enum nvme_get_features_sel <nvme_get_features_sel>` + +``__u16 nvmsetid`` + NVM set id + +``struct nvme_plm_config *data`` + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_features_plm_window (int fd, enum nvme_get_features_sel sel, __u16 nvmsetid, __u32 *result) + + Get window select feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``enum nvme_get_features_sel sel`` + Select which type of attribute to return, see :c:type:`enum nvme_get_features_sel <nvme_get_features_sel>` + +``__u16 nvmsetid`` + NVM set id + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_features_lba_sts_interval (int fd, enum nvme_get_features_sel sel, __u32 *result) + + Get LBA status information feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``enum nvme_get_features_sel sel`` + Select which type of attribute to return, see :c:type:`enum nvme_get_features_sel <nvme_get_features_sel>` + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_features_host_behavior (int fd, enum nvme_get_features_sel sel, struct nvme_feat_host_behavior *data, __u32 *result) + + Get host behavior feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``enum nvme_get_features_sel sel`` + Select which type of attribute to return, see :c:type:`enum nvme_get_features_sel <nvme_get_features_sel>` + +``struct nvme_feat_host_behavior *data`` + Pointer to structure nvme_feat_host_behavior + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_features_sanitize (int fd, enum nvme_get_features_sel sel, __u32 *result) + + Get sanitize feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``enum nvme_get_features_sel sel`` + Select which type of attribute to return, see :c:type:`enum nvme_get_features_sel <nvme_get_features_sel>` + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_features_endurance_event_cfg (int fd, enum nvme_get_features_sel sel, __u16 endgid, __u32 *result) + + Get endurance event config feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``enum nvme_get_features_sel sel`` + Select which type of attribute to return, see :c:type:`enum nvme_get_features_sel <nvme_get_features_sel>` + +``__u16 endgid`` + Endurance Group Identifier + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_features_sw_progress (int fd, enum nvme_get_features_sel sel, __u32 *result) + + Get software progress feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``enum nvme_get_features_sel sel`` + Select which type of attribute to return, see :c:type:`enum nvme_get_features_sel <nvme_get_features_sel>` + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_features_host_id (int fd, enum nvme_get_features_sel sel, bool exhid, __u32 len, __u8 *hostid) + + Get host id feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``enum nvme_get_features_sel sel`` + Select which type of attribute to return, see :c:type:`enum nvme_get_features_sel <nvme_get_features_sel>` + +``bool exhid`` + Enable Extended Host Identifier + +``__u32 len`` + Length of **hostid** + +``__u8 *hostid`` + Buffer for returned host ID + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_features_resv_mask (int fd, enum nvme_get_features_sel sel, __u32 *result) + + Get reservation mask feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``enum nvme_get_features_sel sel`` + Select which type of attribute to return, see :c:type:`enum nvme_get_features_sel <nvme_get_features_sel>` + +``__u32 *result`` + The command completion result from CQE dword0 + +**Description** + + +Deprecated: doesn't support specifying a NSID. +Use nvme_get_features_resv_mask2() instead. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_features_resv_mask2 (int fd, enum nvme_get_features_sel sel, __u32 nsid, __u32 *result) + + Get reservation mask feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``enum nvme_get_features_sel sel`` + Select which type of attribute to return, see :c:type:`enum nvme_get_features_sel <nvme_get_features_sel>` + +``__u32 nsid`` + Namespace ID + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_features_resv_persist (int fd, enum nvme_get_features_sel sel, __u32 *result) + + Get reservation persist feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``enum nvme_get_features_sel sel`` + Select which type of attribute to return, see :c:type:`enum nvme_get_features_sel <nvme_get_features_sel>` + +``__u32 *result`` + The command completion result from CQE dword0 + +**Description** + + +Deprecated: doesn't support specifying a NSID. +Use nvme_get_features_resv_persist2() instead. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_features_resv_persist2 (int fd, enum nvme_get_features_sel sel, __u32 nsid, __u32 *result) + + Get reservation persist feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``enum nvme_get_features_sel sel`` + Select which type of attribute to return, see :c:type:`enum nvme_get_features_sel <nvme_get_features_sel>` + +``__u32 nsid`` + Namespace ID + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_features_write_protect (int fd, __u32 nsid, enum nvme_get_features_sel sel, __u32 *result) + + Get write protect feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u32 nsid`` + Namespace ID + +``enum nvme_get_features_sel sel`` + Select which type of attribute to return, see :c:type:`enum nvme_get_features_sel <nvme_get_features_sel>` + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_features_iocs_profile (int fd, enum nvme_get_features_sel sel, __u32 *result) + + Get IOCS profile feature + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``enum nvme_get_features_sel sel`` + Select which type of attribute to return, see :c:type:`enum nvme_get_features_sel <nvme_get_features_sel>` + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_format_nvm (struct nvme_format_nvm_args *args) + + Format nvme namespace(s) + +**Parameters** + +``struct nvme_format_nvm_args *args`` + :c:type:`struct nvme_format_nvme_args <nvme_format_nvme_args>` argument structure + +**Description** + +The Format NVM command low level formats the NVM media. This command is used +by the host to change the LBA data size and/or metadata size. A low level +format may destroy all data and metadata associated with all namespaces or +only the specific namespace associated with the command + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_ns_mgmt (struct nvme_ns_mgmt_args *args) + + Issue a Namespace management command + +**Parameters** + +``struct nvme_ns_mgmt_args *args`` + :c:type:`struct nvme_ns_mgmt_args <nvme_ns_mgmt_args>` Argument structure + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_ns_mgmt_create (int fd, struct nvme_id_ns *ns, __u32 *nsid, __u32 timeout, __u8 csi, struct nvme_ns_mgmt_host_sw_specified *data) + + Create a non attached namespace + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``struct nvme_id_ns *ns`` + Namespace identification that defines ns creation parameters + +``__u32 *nsid`` + On success, set to the namespace id that was created + +``__u32 timeout`` + Override the default timeout to this value in milliseconds; + set to 0 to use the system default. + +``__u8 csi`` + Command Set Identifier + +``struct nvme_ns_mgmt_host_sw_specified *data`` + Host Software Specified Fields that defines ns creation parameters + +**Description** + +On successful creation, the namespace exists in the subsystem, but is not +attached to any controller. Use the nvme_ns_attach_ctrls() to assign the +namespace to one or more controllers. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_ns_mgmt_delete (int fd, __u32 nsid) + + Delete a non attached namespace + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u32 nsid`` + Namespace identifier to delete + +**Description** + +It is recommended that a namespace being deleted is not attached to any +controller. Use the nvme_ns_detach_ctrls() first if the namespace is still +attached. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_ns_attach (struct nvme_ns_attach_args *args) + + Attach or detach namespace to controller(s) + +**Parameters** + +``struct nvme_ns_attach_args *args`` + :c:type:`struct nvme_ns_attach_args <nvme_ns_attach_args>` Argument structure + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_ns_attach_ctrls (int fd, __u32 nsid, struct nvme_ctrl_list *ctrlist) + + Attach namespace to controllers + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u32 nsid`` + Namespace ID to attach + +``struct nvme_ctrl_list *ctrlist`` + Controller list to modify attachment state of nsid + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_ns_detach_ctrls (int fd, __u32 nsid, struct nvme_ctrl_list *ctrlist) + + Detach namespace from controllers + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u32 nsid`` + Namespace ID to detach + +``struct nvme_ctrl_list *ctrlist`` + Controller list to modify attachment state of nsid + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_fw_download (struct nvme_fw_download_args *args) + + Download part or all of a firmware image to the controller + +**Parameters** + +``struct nvme_fw_download_args *args`` + :c:type:`struct nvme_fw_download_args <nvme_fw_download_args>` argument structure + +**Description** + +The Firmware Image Download command downloads all or a portion of an image +for a future update to the controller. The Firmware Image Download command +downloads a new image (in whole or in part) to the controller. + +The image may be constructed of multiple pieces that are individually +downloaded with separate Firmware Image Download commands. Each Firmware +Image Download command includes a Dword Offset and Number of Dwords that +specify a dword range. + +The new firmware image is not activated as part of the Firmware Image +Download command. Use the nvme_fw_commit() to activate a newly downloaded +image. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_fw_commit (struct nvme_fw_commit_args *args) + + Commit firmware using the specified action + +**Parameters** + +``struct nvme_fw_commit_args *args`` + :c:type:`struct nvme_fw_commit_args <nvme_fw_commit_args>` argument structure + +**Description** + +The Firmware Commit command modifies the firmware image or Boot Partitions. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. The command +status response may specify additional reset actions required to complete +the commit process. + + +.. c:function:: int nvme_security_send (struct nvme_security_send_args *args) + + Security Send command + +**Parameters** + +``struct nvme_security_send_args *args`` + :c:type:`struct nvme_security_send <nvme_security_send>` argument structure + +**Description** + +The Security Send command transfers security protocol data to the +controller. The data structure transferred to the controller as part of this +command contains security protocol specific commands to be performed by the +controller. The data structure transferred may also contain data or +parameters associated with the security protocol commands. + +The security data is protocol specific and is not defined by the NVMe +specification. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_security_receive (struct nvme_security_receive_args *args) + + Security Receive command + +**Parameters** + +``struct nvme_security_receive_args *args`` + :c:type:`struct nvme_security_receive <nvme_security_receive>` argument structure + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_lba_status (struct nvme_get_lba_status_args *args) + + Retrieve information on possibly unrecoverable LBAs + +**Parameters** + +``struct nvme_get_lba_status_args *args`` + :c:type:`struct nvme_get_lba_status_args <nvme_get_lba_status_args>` argument structure + +**Description** + +The Get LBA Status command requests information about Potentially +Unrecoverable LBAs. Refer to the specification for action type descriptions. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_directive_send (struct nvme_directive_send_args *args) + + Send directive command + +**Parameters** + +``struct nvme_directive_send_args *args`` + :c:type:`struct nvme_directive_send_args <nvme_directive_send_args>` argument structure + +**Description** + +Directives is a mechanism to enable host and NVM subsystem or controller +information exchange. The Directive Send command transfers data related to a +specific Directive Type from the host to the controller. + +See the NVMe specification for more information. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_directive_send_id_endir (int fd, __u32 nsid, bool endir, enum nvme_directive_dtype dtype, struct nvme_id_directives *id) + + Directive Send Enable Directive + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u32 nsid`` + Namespace Identifier + +``bool endir`` + Enable Directive + +``enum nvme_directive_dtype dtype`` + Directive Type + +``struct nvme_id_directives *id`` + Pointer to structure nvme_id_directives + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_directive_send_stream_release_identifier (int fd, __u32 nsid, __u16 stream_id) + + Directive Send Stream release + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u32 nsid`` + Namespace ID + +``__u16 stream_id`` + Stream identifier + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_directive_send_stream_release_resource (int fd, __u32 nsid) + + Directive Send Stream release resources + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u32 nsid`` + Namespace ID + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_directive_recv (struct nvme_directive_recv_args *args) + + Receive directive specific data + +**Parameters** + +``struct nvme_directive_recv_args *args`` + :c:type:`struct nvme_directive_recv_args <nvme_directive_recv_args>` argument structure + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_directive_recv_identify_parameters (int fd, __u32 nsid, struct nvme_id_directives *id) + + Directive receive identifier parameters + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u32 nsid`` + Namespace ID + +``struct nvme_id_directives *id`` + Identify parameters buffer + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_directive_recv_stream_parameters (int fd, __u32 nsid, struct nvme_streams_directive_params *parms) + + Directive receive stream parameters + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u32 nsid`` + Namespace ID + +``struct nvme_streams_directive_params *parms`` + Streams directive parameters buffer + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_directive_recv_stream_status (int fd, __u32 nsid, unsigned int nr_entries, struct nvme_streams_directive_status *id) + + Directive receive stream status + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u32 nsid`` + Namespace ID + +``unsigned int nr_entries`` + Number of streams to receive + +``struct nvme_streams_directive_status *id`` + Stream status buffer + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_directive_recv_stream_allocate (int fd, __u32 nsid, __u16 nsr, __u32 *result) + + Directive receive stream allocate + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u32 nsid`` + Namespace ID + +``__u16 nsr`` + Namespace Streams Requested + +``__u32 *result`` + If successful, the CQE dword0 value + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_capacity_mgmt (struct nvme_capacity_mgmt_args *args) + + Capacity management command + +**Parameters** + +``struct nvme_capacity_mgmt_args *args`` + :c:type:`struct nvme_capacity_mgmt_args <nvme_capacity_mgmt_args>` argument structure + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_lockdown (struct nvme_lockdown_args *args) + + Issue lockdown command + +**Parameters** + +``struct nvme_lockdown_args *args`` + :c:type:`struct nvme_lockdown_args <nvme_lockdown_args>` argument structure + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_set_property (struct nvme_set_property_args *args) + + Set controller property + +**Parameters** + +``struct nvme_set_property_args *args`` + :c:type:`struct nvme_set_property_args <nvme_set_property_args>` argument structure + +**Description** + +This is an NVMe-over-Fabrics specific command, not applicable to PCIe. These +properties align to the PCI MMIO controller registers. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_get_property (struct nvme_get_property_args *args) + + Get a controller property + +**Parameters** + +``struct nvme_get_property_args *args`` + :c:type:`struct nvme_get_propert_args <nvme_get_propert_args>` argument structure + +**Description** + +This is an NVMe-over-Fabrics specific command, not applicable to PCIe. These +properties align to the PCI MMIO controller registers. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_sanitize_nvm (struct nvme_sanitize_nvm_args *args) + + Start a sanitize operation + +**Parameters** + +``struct nvme_sanitize_nvm_args *args`` + :c:type:`struct nvme_sanitize_nvm_args <nvme_sanitize_nvm_args>` argument structure + +**Description** + +A sanitize operation alters all user data in the NVM subsystem such that +recovery of any previous user data from any cache, the non-volatile media, +or any Controller Memory Buffer is not possible. + +The Sanitize command starts a sanitize operation or to recover from a +previously failed sanitize operation. The sanitize operation types that may +be supported are Block Erase, Crypto Erase, and Overwrite. All sanitize +operations are processed in the background, i.e., completion of the sanitize +command does not indicate completion of the sanitize operation. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_dev_self_test (struct nvme_dev_self_test_args *args) + + Start or abort a self test + +**Parameters** + +``struct nvme_dev_self_test_args *args`` + :c:type:`struct nvme_dev_self_test <nvme_dev_self_test>` argument structure + +**Description** + +The Device Self-test command starts a device self-test operation or abort a +device self-test operation. A device self-test operation is a diagnostic +testing sequence that tests the integrity and functionality of the +controller and may include testing of the media associated with namespaces. +The controller may return a response to this command immediately while +running the self-test in the background. + +Set the 'nsid' field to 0 to not include namespaces in the test. Set to +0xffffffff to test all namespaces. All other values tests a specific +namespace, if present. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_virtual_mgmt (struct nvme_virtual_mgmt_args *args) + + Virtualization resource management + +**Parameters** + +``struct nvme_virtual_mgmt_args *args`` + :c:type:`struct nvme_virtual_mgmt_args <nvme_virtual_mgmt_args>` argument structure + +**Description** + +The Virtualization Management command is supported by primary controllers +that support the Virtualization Enhancements capability. This command is +used for several functions: + + - Modifying Flexible Resource allocation for the primary controller + - Assigning Flexible Resources for secondary controllers + - Setting the Online and Offline state for secondary controllers + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_flush (int fd, __u32 nsid) + + Send an nvme flush command + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u32 nsid`` + Namespace identifier + +**Description** + +The Flush command requests that the contents of volatile write cache be made +non-volatile. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_io (struct nvme_io_args *args, __u8 opcode) + + Submit an nvme user I/O command + +**Parameters** + +``struct nvme_io_args *args`` + :c:type:`struct nvme_io_args <nvme_io_args>` argument structure + +``__u8 opcode`` + Opcode to execute + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_read (struct nvme_io_args *args) + + Submit an nvme user read command + +**Parameters** + +``struct nvme_io_args *args`` + :c:type:`struct nvme_io_args <nvme_io_args>` argument structure + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_write (struct nvme_io_args *args) + + Submit an nvme user write command + +**Parameters** + +``struct nvme_io_args *args`` + :c:type:`struct nvme_io_args <nvme_io_args>` argument structure + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_compare (struct nvme_io_args *args) + + Submit an nvme user compare command + +**Parameters** + +``struct nvme_io_args *args`` + :c:type:`struct nvme_io_args <nvme_io_args>` argument structure + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_write_zeros (struct nvme_io_args *args) + + Submit an nvme write zeroes command + +**Parameters** + +``struct nvme_io_args *args`` + :c:type:`struct nvme_io_args <nvme_io_args>` argument structure + +**Description** + +The Write Zeroes command sets a range of logical blocks to zero. After +successful completion of this command, the value returned by subsequent +reads of logical blocks in this range shall be all bytes cleared to 0h until +a write occurs to this LBA range. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_write_uncorrectable (struct nvme_io_args *args) + + Submit an nvme write uncorrectable command + +**Parameters** + +``struct nvme_io_args *args`` + :c:type:`struct nvme_io_args <nvme_io_args>` argument structure + +**Description** + +The Write Uncorrectable command marks a range of logical blocks as invalid. +When the specified logical block(s) are read after this operation, a failure +is returned with Unrecovered Read Error status. To clear the invalid logical +block status, a write operation on those logical blocks is required. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_verify (struct nvme_io_args *args) + + Send an nvme verify command + +**Parameters** + +``struct nvme_io_args *args`` + :c:type:`struct nvme_io_args <nvme_io_args>` argument structure + +**Description** + +The Verify command verifies integrity of stored information by reading data +and metadata, if applicable, for the LBAs indicated without transferring any +data or metadata to the host. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_dsm (struct nvme_dsm_args *args) + + Send an nvme data set management command + +**Parameters** + +``struct nvme_dsm_args *args`` + :c:type:`struct nvme_dsm_args <nvme_dsm_args>` argument structure + +**Description** + +The Dataset Management command is used by the host to indicate attributes +for ranges of logical blocks. This includes attributes like frequency that +data is read or written, access size, and other information that may be used +to optimize performance and reliability, and may be used to +deallocate/unmap/trim those logical blocks. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_copy (struct nvme_copy_args *args) + + Copy command + +**Parameters** + +``struct nvme_copy_args *args`` + :c:type:`struct nvme_copy_args <nvme_copy_args>` argument structure + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_resv_acquire (struct nvme_resv_acquire_args *args) + + Send an nvme reservation acquire + +**Parameters** + +``struct nvme_resv_acquire_args *args`` + :c:type:`struct nvme_resv_acquire <nvme_resv_acquire>` argument structure + +**Description** + +The Reservation Acquire command acquires a reservation on a namespace, +preempt a reservation held on a namespace, and abort a reservation held on a +namespace. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_resv_register (struct nvme_resv_register_args *args) + + Send an nvme reservation register + +**Parameters** + +``struct nvme_resv_register_args *args`` + :c:type:`struct nvme_resv_register_args <nvme_resv_register_args>` argument structure + +**Description** + +The Reservation Register command registers, unregisters, or replaces a +reservation key. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_resv_release (struct nvme_resv_release_args *args) + + Send an nvme reservation release + +**Parameters** + +``struct nvme_resv_release_args *args`` + :c:type:`struct nvme_resv_release_args <nvme_resv_release_args>` argument structure + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_resv_report (struct nvme_resv_report_args *args) + + Send an nvme reservation report + +**Parameters** + +``struct nvme_resv_report_args *args`` + struct nvme_resv_report_args argument structure + +**Description** + +Returns a Reservation Status data structure to memory that describes the +registration and reservation status of a namespace. See the definition for +the returned structure, :c:type:`struct nvme_reservation_status <nvme_reservation_status>`, for more details. + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_io_mgmt_recv (struct nvme_io_mgmt_recv_args *args) + + I/O Management Receive command + +**Parameters** + +``struct nvme_io_mgmt_recv_args *args`` + :c:type:`struct nvme_io_mgmt_recv_args <nvme_io_mgmt_recv_args>` argument structure + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_fdp_reclaim_unit_handle_status (int fd, __u32 nsid, __u32 data_len, void *data) + + Get reclaim unit handle status + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u32 nsid`` + Namespace identifier + +``__u32 data_len`` + Length of response buffer + +``void *data`` + Response buffer + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_io_mgmt_send (struct nvme_io_mgmt_send_args *args) + + I/O Management Send command + +**Parameters** + +``struct nvme_io_mgmt_send_args *args`` + :c:type:`struct nvme_io_mgmt_send_args <nvme_io_mgmt_send_args>` argument structure + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_fdp_reclaim_unit_handle_update (int fd, __u32 nsid, unsigned int npids, __u16 *pids) + + Update a list of reclaim unit handles + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u32 nsid`` + Namespace identifier + +``unsigned int npids`` + Number of placement identifiers + +``__u16 *pids`` + List of placement identifiers + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_zns_mgmt_send (struct nvme_zns_mgmt_send_args *args) + + ZNS management send command + +**Parameters** + +``struct nvme_zns_mgmt_send_args *args`` + :c:type:`struct nvme_zns_mgmt_send_args <nvme_zns_mgmt_send_args>` argument structure + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_zns_mgmt_recv (struct nvme_zns_mgmt_recv_args *args) + + ZNS management receive command + +**Parameters** + +``struct nvme_zns_mgmt_recv_args *args`` + :c:type:`struct nvme_zns_mgmt_recv_args <nvme_zns_mgmt_recv_args>` argument structure + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_zns_report_zones (int fd, __u32 nsid, __u64 slba, enum nvme_zns_report_options opts, bool extended, bool partial, __u32 data_len, void *data, __u32 timeout, __u32 *result) + + Return the list of zones + +**Parameters** + +``int fd`` + File descriptor of nvme device + +``__u32 nsid`` + Namespace ID + +``__u64 slba`` + Starting LBA + +``enum nvme_zns_report_options opts`` + Reporting options + +``bool extended`` + Extended report + +``bool partial`` + Partial report requested + +``__u32 data_len`` + Length of the data buffer + +``void *data`` + Userspace address of the report zones data + +``__u32 timeout`` + timeout in ms + +``__u32 *result`` + The command completion result from CQE dword0 + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_zns_append (struct nvme_zns_append_args *args) + + Append data to a zone + +**Parameters** + +``struct nvme_zns_append_args *args`` + :c:type:`struct nvme_zns_append_args <nvme_zns_append_args>` argument structure + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: int nvme_dim_send (struct nvme_dim_args *args) + + Send a Discovery Information Management (DIM) command + +**Parameters** + +``struct nvme_dim_args *args`` + :c:type:`struct nvme_dim_args <nvme_dim_args>` argument structure + +**Return** + +The nvme command status if a response was received (see +:c:type:`enum nvme_status_field <nvme_status_field>`) or -1 with errno set otherwise. + + +.. c:function:: void nvme_set_debug (bool debug) + + Set NVMe command debugging output + +**Parameters** + +``bool debug`` + true to enable or false to disable + + +.. c:function:: bool nvme_get_debug (void) + + Get NVMe command debugging output + +**Parameters** + +``void`` + no arguments + +**Return** + +false if disabled or true if enabled. + + |