libnvme(9) API Manual libnvme(9)

# [NAME](#NAME)

enum nvme\_id\_ctrl\_trattr - Tracking Attributes

# [SYNOPSIS](#SYNOPSIS)

enum nvme\_id\_ctrl\_trattr {  
**NVME\_CTRL\_TRATTR\_THMCS\_SHIFT** ,  
**NVME\_CTRL\_TRATTR\_TUDCS\_SHIFT** ,  
**NVME\_CTRL\_TRATTR\_MRTLL\_SHIFT** ,  
**NVME\_CTRL\_TRATTR\_THMCS\_MASK** ,  
**NVME\_CTRL\_TRATTR\_TUDCS\_MASK** ,  
**NVME\_CTRL\_TRATTR\_MRTLL\_MASK**

};

# [Constants](#Constants)

[NVME\_CTRL\_TRATTR\_THMCS\_SHIFT](#NVME_CTRL_TRATTR_THMCS_SHIFT)

Shift amount to get the Track Host Memory Changes Support from the *struct nvme\_id\_ctrl*.trattr field.

[NVME\_CTRL\_TRATTR\_TUDCS\_SHIFT](#NVME_CTRL_TRATTR_TUDCS_SHIFT)

Shift amount to get the Track User Data Changes Support from the *struct nvme\_id\_ctrl*.trattr field.

[NVME\_CTRL\_TRATTR\_MRTLL\_SHIFT](#NVME_CTRL_TRATTR_MRTLL_SHIFT)

Shift amount to get the Memory Range Tracking Length Limit from the *struct nvme\_id\_ctrl*.trattr field.

[NVME\_CTRL\_TRATTR\_THMCS\_MASK](#NVME_CTRL_TRATTR_THMCS_MASK)

Mask to get the Track Host Memory Changes Support from the *struct nvme\_id\_ctrl*.trattr field.

[NVME\_CTRL\_TRATTR\_TUDCS\_MASK](#NVME_CTRL_TRATTR_TUDCS_MASK)

Mask to get the Track User Data Changes Support from the *struct nvme\_id\_ctrl*.trattr field.

[NVME\_CTRL\_TRATTR\_MRTLL\_MASK](#NVME_CTRL_TRATTR_MRTLL_MASK)

Mask to get the Memory Range Tracking Length Limit from the *struct nvme\_id\_ctrl*.trattr field.

enum nvme\_id\_ctrl\_trattr October 2026

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