GEOM provides a simple mechanism for providing remote access to devices such as disks, CDs, and file systems through the use of the GEOM Gate network daemon, ggated. The system with the device runs the server daemon which handles requests made by clients using ggatec. The devices should not contain any sensitive data as the connection between the client and the server is not encrypted.
Similar to NFS, which is discussed in
節 29.3, “網路檔案系統 (NFS)”, ggated
is configured using an exports file. This file specifies which
systems are permitted to access the exported resources and what
level of access they are offered. For example, to give the
client 192.168.1.5
read and write access to the fourth slice on the first
SCSI disk, create
/etc/gg.exports
with this line:
192.168.1.5 RW /dev/da0s4d
Before exporting the device, ensure it is not currently mounted. Then, start ggated:
#
ggated
Several options are available for specifying an alternate listening port or changing the default location of the exports file. Refer to ggated(8) for details.
To access the exported device on the client machine, first
use ggatec
to specify the
IP address of the server and the device name
of the exported device. If successful, this command will
display a ggate
device name to mount. Mount
that specified device name on a free mount point. This example
connects to the /dev/da0s4d
partition on
192.168.1.1
, then mounts
/dev/ggate0
on
/mnt
:
#
ggatec create -o rw 192.168.1.1 /dev/da0s4d
ggate0
#
mount /dev/ggate0 /mnt
The device on the server may now be accessed through
/mnt
on the client. For more details about
ggatec
and a few usage examples, refer to
ggatec(8).
The mount will fail if the device is currently mounted on either the server or any other client on the network. If simultaneous access is needed to network resources, use NFS instead.
When the device is no longer needed, unmount it with
umount
so that the resource is available to
other clients.
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