CONFIG_NETFS_SUPPORT (not configurable)

modulename: netfs.ko

configname: CONFIG_NETFS_SUPPORT

Linux Kernel Configuration
└─>File systems
└─>Caches
└─>NETFS_SUPPORT
In linux kernel since version 4.14.326 (release Date: 2023-09-23)  
This option enables support for network filesystems, including
helpers for high-level buffered I/O, abstracting out read
segmentation, local caching and transparent huge page support.

source code:
fs/netfs/