RUMP_LFS(8) | System Manager's Manual | RUMP_LFS(8) |
rump_lfs
—
file-system PUFFS
pseudo-device putter
rump_lfs |
[options] image mountpoint |
The rump_lfs
utility can be used to mount
lfs file systems. It uses
rump(3) and
p2k(3) to facilitate running the
file system as a server in userspace. As opposed to
mount_lfs(8),
rump_lfs
does not use file system code within the
kernel and therefore does not require kernel support except
puffs(4). Apart from a minor
speed penalty there is no downside with respect to in-kernel code.
rump_lfs
does not require using
vnconfig(8) for mounts from
regular files and the file path can be passed directly as the
image parameter. In fact, the use of
vnconfig(8) is discouraged,
since it is unable to properly deal with images on sparse files.
In case the image contains multiple partitions, the desired partition must be indicated by appending the token “%DISKLABEL:p%” to the image path. The letter “p” specifies the partition as obtained via disklabel(8). For example, to mount partition “e” from image /tmp/wd0.img, use “/tmp/wd0.img%DISKLABEL:e%”.
It is recommended that untrusted file system images be mounted
with rump_lfs
instead of
mount_lfs(8). Corrupt file
system images commonly cause the file system to crash the entire kernel, but
with rump_lfs
only the userspace server process will
dump core.
To use rump_lfs
via
mount(8), the flags
-o
rump and
-t
lfs should be given.
Similarly, rump_lfs
is used instead of
mount_lfs(8) if
“rump” is added to the options field of
fstab(5).
rump_lfs
utility first appeared in
NetBSD 5.0.
November 21, 2010 | NetBSD 9.4 |