Find the file system @a path was mounted from. The statfs() and stat() information for @a path should be in @a sfs and @a s, respectively. Finds currently mounted file system that @a path is owned by, and returns the FSInfo object for it, or null if no matching live file system can be found. If the return value is non-null, then it is guaranteed @a path was on that file
source not stored for this graph (policy: none)