libnvme(9)                        API Manual                        libnvme(9)

NAME
       struct nvme_rate_limiting_controller_descriptor - Rate Limiting
       Controller Descriptor (QCD)

SYNOPSIS
       struct nvme_rate_limiting_controller_descriptor {
           __le16 cntlid;
           __le16 nnsmad;
           __u8 rsvd4[4];
           struct nvme_rate_limiting_max_access_descriptor rlma;
           __u8 rsvd40[24];
           __u8 vs[256];
           __le32 nvsma_offset[];
        };


Members
       cntlid      Controller Identifier

       nnsmad      Number of Non-Volatile Storage Medium Access Descriptors in
                   nvsma_offset, non-zero

       rsvd4       Reserved

       rlma        Rate Limiting Maximum Access of the controller to the NVM
                   subsystem port

       rsvd40      Reserved

       vs          Vendor Specific

       nvsma_offset
                   Dword offsets, relative to the start of the Rate Limiting
                   log page, to the Non-Volatile Storage Medium Access
                   Descriptors, nnsmad entries

October 2026    struct nvme_rate_limiting_controller_descriptor     libnvme(9)