libnvme(9) API Manual libnvme(9)

# [NAME](#NAME)

enum nvme\_cmbebs - This field indicates the controller memory buffer elasticity buffer size

# [SYNOPSIS](#SYNOPSIS)

enum nvme\_cmbebs {  
**NVME\_CMBEBS\_CMBSZU\_SHIFT** ,  
**NVME\_CMBEBS\_RBB\_SHIFT** ,  
**NVME\_CMBEBS\_CMBWBZ\_SHIFT** ,  
**NVME\_CMBEBS\_CMBSZU\_MASK** ,  
**NVME\_CMBEBS\_RBB\_MASK** ,  
**NVME\_CMBEBS\_CMBWBZ\_MASK** ,  
**NVME\_CMBEBS\_CMBSZU\_B** ,  
**NVME\_CMBEBS\_CMBSZU\_1K** ,  
**NVME\_CMBEBS\_CMBSZU\_1M** ,  
**NVME\_CMBEBS\_CMBSZU\_1G**

};

# [Constants](#Constants)

[NVME\_CMBEBS\_CMBSZU\_SHIFT](#NVME_CMBEBS_CMBSZU_SHIFT)

Shift amount to get the CMB elasticity buffer size units

[NVME\_CMBEBS\_RBB\_SHIFT](#NVME_CMBEBS_RBB_SHIFT)

Shift amount to get the read bypass behavior

[NVME\_CMBEBS\_CMBWBZ\_SHIFT](#NVME_CMBEBS_CMBWBZ_SHIFT)

Shift amount to get the CMB elasiticity buffer size base

[NVME\_CMBEBS\_CMBSZU\_MASK](#NVME_CMBEBS_CMBSZU_MASK)

Mask to get the CMB elasticity buffer size units

[NVME\_CMBEBS\_RBB\_MASK](#NVME_CMBEBS_RBB_MASK)

Mask to get the read bypass behavior

[NVME\_CMBEBS\_CMBWBZ\_MASK](#NVME_CMBEBS_CMBWBZ_MASK)

Mask to get the CMB elasiticity buffer size base

[NVME\_CMBEBS\_CMBSZU\_B](#NVME_CMBEBS_CMBSZU_B)

Bytes granularity

[NVME\_CMBEBS\_CMBSZU\_1K](#NVME_CMBEBS_CMBSZU_1K)

1 KiB granularity

[NVME\_CMBEBS\_CMBSZU\_1M](#NVME_CMBEBS_CMBSZU_1M)

1 MiB granularity

[NVME\_CMBEBS\_CMBSZU\_1G](#NVME_CMBEBS_CMBSZU_1G)

1 GiB granularity

enum nvme\_cmbebs October 2026

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Document: nvme_cmbebs-libnvme3(2) from nvme-cli 3.2-r0 (Chainguard OS)
Source: https://github.com/linux-nvme/nvme-cli