81d3e123cb
This patch adds steps about configuring and using the RPMsg file system with simple example. Signed-off-by: Yanfeng Liu <yfliu2008@qq.com>
33 lines
1.3 KiB
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33 lines
1.3 KiB
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=================
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RPMSG File System
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=================
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Once RPMsg link is available, we can use rpmsg file system to mount remote directories with the help of RPMsg file system drivers.
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Here we show an example of mounting and using a master file system path from remote side, it is as easy as using a local file system.
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Building
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========
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At file system server side (the master), we need enable the ``CONFIG_FS_RPMSGFS_SERVER`` configuration.
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At file system client side (the remote), we need enable the ``CONFIG_FS_RPMSGFS`` configuration.
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Then we build the two sides accordingly.
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Running
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=======
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Using the following command to mount the master's ``/proc`` file system to ``/proc.master`` from the ``nsh`` sessino of the remote node.
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.. code:: console
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remote> mount -t rpmsgfs -o cpu=master,fs=/proc /proc.master
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remote> cat /proc/uptime /proc.master/uptime
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39.06
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39.06
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remote>
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Note the ``-o cpu=master,fs=/proc`` specifies the ``master`` node's ``/proc`` path as the source, the ``/proc.master`` is the mount point at remote side. All files under that mount point is actually hosted at the master side. The ``-t rpmsgfs`` selects the RPMsg file system driver to serve the operation.
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