This is xnu-6153.11.26. See this file in:
Directory listing for xnu-6153.11.26//bsd/vfs
Makefile
doc_tombstone.c
kpi_vfs.c
vfs_attrlist.c
vfs_bio.c
vfs_cache.c
vfs_cluster.c
vfs_conf.c
vfs_cprotect.c
vfs_disk_conditioner.c
vfs_disk_conditioner.h
vfs_fsevents.c
vfs_fslog.c
vfs_init.c
vfs_lookup.c
vfs_quota.c
vfs_subr.c
vfs_support.c
vfs_support.h
vfs_syscalls.c
vfs_utfconv.c
vfs_utfconvdata.h
vfs_vnops.c
vfs_xattr.c
vnode_if.c
vnode_if.sh
vnode_if.src