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diff --git a/Documentation/filesystems/9p.txt b/Documentation/filesystems/9p.txt
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+++ b/Documentation/filesystems/9p.txt
@@ -88,6 +88,16 @@ OPTIONS
This can be used to share devices/named pipes/sockets between
hosts. This functionality will be expanded in later versions.
+ access there are three access modes.
+ user = if a user tries to access a file on v9fs
+ filesystem for the first time, v9fs sends an
+ attach command (Tattach) for that user.
+ This is the default mode.
+ <uid> = allows only user with uid=<uid> to access
+ the files on the mounted filesystem
+ any = v9fs does single attach and performs all
+ operations as one user
+
RESOURCES
=========