libnvmf_registry_update(9)    libnvme API manual    libnvmf_registry_update(9)

NAME
       libnvmf_registry_update - Update an attribute in a controller's
       registry entry

SYNOPSIS
       int libnvmf_registry_update (struct libnvme_global_ctx *ctx , const
       char *device , const char *attr , const char *value );

ARGUMENTS
       ctx         libnvme global context; must not be NULL

       device      Kernel device name (e.g. "nvme3")

       attr        Attribute name to update (e.g. "owner")

       value       New attribute value, or NULL to remove the attribute file

DESCRIPTION
       Writes the attribute value to the controller's registry entry using an
       atomic tmp-file rename.  If the entry does not exist, it is created
       atomically the same way as on connect, including the best-effort seqnum
       stamp for the udev cleanup rule.  If value is NULL, the attribute file
       is removed instead; a missing entry is left alone in this case.

RETURN
       0 on success, negative errno from underlying system calls otherwise.

October 2026                libnvmf_registry_update libnvmf_registry_update(9)