NAME

nvme_io_passthru - Submit an nvme io passthrough command

SYNOPSIS

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 );

ARGUMENTS

fd

File descriptor of nvme device

opcode

The nvme io command to send

flags

NVMe command flags (not used)

rsvd

Reserved for future use

nsid

Namespace identifier

cdw2

Command dword 2

cdw3

Command dword 3

cdw10

Command dword 10

cdw11

Command dword 11

cdw12

Command dword 12

cdw13

Command dword 13

cdw14

Command dword 14

cdw15

Command dword 15

data_len

Length of the data transferred in this command in bytes

data

Pointer to user address of the data buffer

metadata_len

Length of metadata transferred in this command

metadata

Pointer to user address of the metadata buffer

timeout_ms

How long the kernel waits for the command to complete

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 struct nvme_passthru_cmd.

Known values for opcode are defined in enum nvme_io_opcode.

RETURN

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.