struct nvme_id_ns - Identify Namespace data structure
struct nvme_id_ns {
__le64 nsze;
__le64 ncap;
__le64 nuse;
__u8 nsfeat;
__u8 nlbaf;
__u8 flbas;
__u8 mc;
__u8 dpc;
__u8 dps;
__u8 nmic;
__u8 rescap;
__u8 fpi;
__u8 dlfeat;
__le16 nawun;
__le16 nawupf;
__le16 nacwu;
__le16 nabsn;
__le16 nabo;
__le16 nabspf;
__le16 noiob;
__u8 nvmcap[16];
__le16 npwg;
__le16 npwa;
__le16 npdg;
__le16 npda;
__le16 nows;
__le16 mssrl;
__le32 mcl;
__u8 msrc;
__u8 rsvd81;
__u8 nulbaf;
__u8 rsvd83[9];
__le32 anagrpid;
__u8 rsvd96[3];
__u8 nsattr;
__le16 nvmsetid;
__le16 endgid;
__u8 nguid[16];
__u8 eui64[8];
struct nvme_lbaf lbaf[64];
__u8 vs[3712];
};
- nsze
- Namespace Size indicates the total size of the namespace in logical
blocks. The number of logical blocks is based on the formatted LBA
size.
- ncap
- Namespace Capacity indicates the maximum number of logical blocks that may
be allocated in the namespace at any point in time. The number of logical
blocks is based on the formatted LBA size.
- nuse
- Namespace Utilization indicates the current number of logical blocks
allocated in the namespace. This field is smaller than or equal to the
Namespace Capacity. The number of logical blocks is based on the formatted
LBA size.
- nsfeat
- Namespace Features, see enum nvme_id_nsfeat.
- nlbaf
- Number of LBA Formats defines the number of supported LBA data size and
metadata size combinations supported by the namespace and the highest
possible index to struct nvme_id_ns.lbaf.
- flbas
- Formatted LBA Size, see enum nvme_id_ns_flbas.
- mc
- Metadata Capabilities, see enum nvme_id_ns_mc.
- dpc
- End-to-end Data Protection Capabilities, see enum
nvme_id_ns_dpc.
- dps
- End-to-end Data Protection Type Settings, see enum
nvme_id_ns_dps.
- nmic
- Namespace Multi-path I/O and Namespace Sharing Capabilities, see enum
nvme_id_ns_nmic.
- rescap
- Reservation Capabilities, see enum nvme_id_ns_rescap.
- fpi
- Format Progress Indicator, see enum nvme_nd_ns_fpi.
- dlfeat
- Deallocate Logical Block Features, see enum nvme_id_ns_dlfeat.
- nawun
- Namespace Atomic Write Unit Normal indicates the namespace specific size
of the write operation guaranteed to be written atomically to the NVM
during normal operation.
- nawupf
- Namespace Atomic Write Unit Power Fail indicates the namespace specific
size of the write operation guaranteed to be written atomically to the NVM
during a power fail or error condition.
- nacwu
- Namespace Atomic Compare & Write Unit indicates the namespace specific
size of the write operation guaranteed to be written atomically to the NVM
for a Compare and Write fused command.
- nabsn
- Namespace Atomic Boundary Size Normal indicates the atomic boundary size
for this namespace for the NAWUN value. This field is specified in logical
blocks.
- nabo
- Namespace Atomic Boundary Offset indicates the LBA on this namespace where
the first atomic boundary starts.
- nabspf
- Namespace Atomic Boundary Size Power Fail indicates the atomic boundary
size for this namespace specific to the Namespace Atomic Write Unit Power
Fail value. This field is specified in logical blocks.
- noiob
- Namespace Optimal I/O Boundary indicates the optimal I/O boundary for this
namespace. This field is specified in logical blocks. The host should
construct Read and Write commands that do not cross the I/O boundary to
achieve optimal performance.
- nvmcap
- NVM Capacity indicates the total size of the NVM allocated to this
namespace. The value is in bytes.
- npwg
- Namespace Preferred Write Granularity indicates the smallest recommended
write granularity in logical blocks for this namespace. This is a 0's
based value.
- npwa
- Namespace Preferred Write Alignment indicates the recommended write
alignment in logical blocks for this namespace. This is a 0's based
value.
- npdg
- Namespace Preferred Deallocate Granularity indicates the recommended
granularity in logical blocks for the Dataset Management command with the
Attribute - Deallocate bit.
- npda
- Namespace Preferred Deallocate Alignment indicates the recommended
alignment in logical blocks for the Dataset Management command with the
Attribute - Deallocate bit
- nows
- Namespace Optimal Write Size indicates the size in logical blocks for
optimal write performance for this namespace. This is a 0's based
value.
- mssrl
- Maximum Single Source Range Length indicates the maximum number of logical
blocks that may be specified in each valid Source Range field of a Copy
command.
- mcl
- Maximum Copy Length indicates the maximum number of logical blocks that
may be specified in a Copy command.
- msrc
- Maximum Source Range Count indicates the maximum number of Source Range
entries that may be used to specify source data in a Copy command. This is
a 0’s based value.
- rsvd81
- Reserved
- nulbaf
- Number of Unique Capability LBA Formats defines the number of supported
user data size and metadata size combinations supported by the namespace
that may not share the same capabilities. LBA formats shall be allocated
in order and packed sequentially.
- rsvd83
- Reserved
- anagrpid
- ANA Group Identifier indicates the ANA Group Identifier of the ANA group
of which the namespace is a member.
- rsvd96
- Reserved
- nsattr
- Namespace Attributes, see enum nvme_id_ns_attr.
- nvmsetid
- NVM Set Identifier indicates the NVM Set with which this namespace is
associated.
- endgid
- Endurance Group Identifier indicates the Endurance Group with which this
namespace is associated.
- nguid
- Namespace Globally Unique Identifier contains a 128-bit value that is
globally unique and assigned to the namespace when the namespace is
created. This field remains fixed throughout the life of the namespace and
is preserved across namespace and controller operations
- eui64
- IEEE Extended Unique Identifier contains a 64-bit IEEE Extended Unique
Identifier (EUI-64) that is globally unique and assigned to the namespace
when the namespace is created. This field remains fixed throughout the
life of the namespace and is preserved across namespace and controller
operations
- lbaf
- LBA Format, see struct nvme_lbaf.
- vs
- Vendor Specific