RUMP_V7FS(8) | System Manager's Manual | RUMP_V7FS(8) |
rump_v7fs
—
file-system PUFFS
pseudo-device putter
rump_v7fs |
[options] image mountpoint |
The rump_v7fs
utility can be used to mount
v7fs file systems. It uses
rump(3) and
p2k(3) to facilitate running the
file system as a server in userspace. As opposed to
mount_v7fs(8),
rump_v7fs
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_v7fs
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_v7fs
instead of
mount_v7fs(8). Corrupt
file system images commonly cause the file system to crash the entire
kernel, but with rump_v7fs
only the userspace server
process will dump core.
To use rump_v7fs
via
mount(8), the flags
-o
rump and
-t
v7fs should be given.
Similarly, rump_v7fs
is used instead of
mount_v7fs(8) if
“rump” is added to the options field of
fstab(5).
rump_v7fs
utility first appeared in
NetBSD 6.0.
November 21, 2010 | NetBSD 9.4 |