Manual browser: rump_syspuffs(8)

RUMP_SYSPUFFS(8) System Manager's Manual RUMP_SYSPUFFS(8)


rump_syspuffsmount a puffs file server with a userspace puffs loop


file-system PUFFS
pseudo-device putter

rump_syspuffs file_server arguments


The rump_syspuffs utility can be used to mount any puffs(3) file server so that the requests are passed through the kernel puffs code in userspace as well. Therefore the approximate callgraph looks a little like the following, where k and u denote code running in the kernel space and userspace, respectively: puffs vfs (k) → libpuffs (u) → p2k (u) → puffs vfs (u) → libpuffs (u) → file server (u). The response path is the same, but in reverse.

In its current state, rump_syspuffs is most useful as a proof of concept for file system distribution and for developing and debugging the kernel portion of puffs.


Mount a file system with sshfs:
rump_syspuffs mount_psshfs server.address /mnt

Mount an ntfs file system using ntfs-3g (from pkgsrc/filesystems/fuse-ntfs-3g), set the default uid to 1323:

rump_syspuffs ntfs-3g -o uid=1323 /path/to/filesystem /mnt


The rump_syspuffs debugging utility first appeared in NetBSD 5.0.
June 9, 2009 NetBSD 7.0