struct libnvme_passthru_cmd

nvme passthrough command structure

Definition

struct libnvme_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 rsvd2;
  __u64 result;
};

Members

opcode

Operation code, see enum libnvme_io_opcodes and enum libnvme_admin_opcodes

flags

Supported only for NVMe-MI

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

struct libnvme_uring_cmd

nvme uring command structure

Definition

struct libnvme_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 enum libnvme_io_opcodes and enum libnvme_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