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| author | Michael Grzeschik <m.grzeschik@pengutronix.de> | 2024-09-01 22:11:17 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-09-03 10:57:08 +0300 |
| commit | a3be076dc174d9022a71a12554feb4c97b5c4d5c (patch) | |
| tree | 2f9daaa4e0380ffcc56a4bec4f19cb96aaf657fd /Documentation/filesystems/9p.rst | |
| parent | d9c61bb33fbbcbc2d5f69efa10db116dab4b56cc (diff) | |
| download | linux-a3be076dc174d9022a71a12554feb4c97b5c4d5c.tar.xz | |
net/9p/usbg: Add new usb gadget function transport
Add the new gadget function for 9pfs transport. This function is
defining an simple 9pfs transport interface that consists of one in and
one out endpoint. The endpoints transmit and receive the 9pfs protocol
payload when mounting a 9p filesystem over usb.
Tested-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com>
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Link: https://lore.kernel.org/r/20240116-ml-topic-u9p-v12-2-9a27de5160e0@pengutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/filesystems/9p.rst')
| -rw-r--r-- | Documentation/filesystems/9p.rst | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/Documentation/filesystems/9p.rst b/Documentation/filesystems/9p.rst index 1e0e0bb6fdf9..10cf79dc287f 100644 --- a/Documentation/filesystems/9p.rst +++ b/Documentation/filesystems/9p.rst @@ -48,11 +48,25 @@ For server running on QEMU host with virtio transport:: mount -t 9p -o trans=virtio <mount_tag> /mnt/9 -where mount_tag is the tag associated by the server to each of the exported +where mount_tag is the tag generated by the server to each of the exported mount points. Each 9P export is seen by the client as a virtio device with an associated "mount_tag" property. Available mount tags can be seen by reading /sys/bus/virtio/drivers/9pnet_virtio/virtio<n>/mount_tag files. +USBG Usage +========== + +To mount a 9p FS on a USB Host accessible via the gadget at runtime:: + + mount -t 9p -o trans=usbg,aname=/path/to/fs <device> /mnt/9 + +To mount a 9p FS on a USB Host accessible via the gadget as root filesystem:: + + root=<device> rootfstype=9p rootflags=trans=usbg,cache=loose,uname=root,access=0,dfltuid=0,dfltgid=0,aname=/path/to/rootfs + +where <device> is the tag associated by the usb gadget transport. +It is defined by the configfs instance name. + Options ======= @@ -68,6 +82,7 @@ Options virtio connect to the next virtio channel available (from QEMU with trans_virtio module) rdma connect to a specified RDMA channel + usbg connect to a specified usb gadget channel ======== ============================================ uname=name user name to attempt mount as on the remote server. The |