From ccbd0c991985afc53670e2b01840517922fc30e4 Mon Sep 17 00:00:00 2001 From: Rodrigo Campos Date: Fri, 29 Apr 2022 15:57:48 +0200 Subject: docs: Add small intro to idmap examples When reading the documentation, I didn't understand why this list examples of things that fail without using the mount idmap feature. It seems pretty pointless and I doubted if I was missing something, until I finished the examples, the next section and saw the examples revisited. After that, it all made sense. Let's add one small sentence before, so the reader knows where this is going and why examples that don't might seem relevant are used. Link: https://lore.kernel.org/r/20220429135748.481301-1-rodrigo@sdfg.com.ar Reviewed-by: Christian Brauner (Microsoft) Signed-off-by: Rodrigo Campos Signed-off-by: Christian Brauner (Microsoft) --- Documentation/filesystems/idmappings.rst | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'Documentation/filesystems') diff --git a/Documentation/filesystems/idmappings.rst b/Documentation/filesystems/idmappings.rst index 7a879ec3b6bf..c1db8748389c 100644 --- a/Documentation/filesystems/idmappings.rst +++ b/Documentation/filesystems/idmappings.rst @@ -369,6 +369,11 @@ kernel maps the caller's userspace id down into a kernel id according to the caller's idmapping and then maps that kernel id up according to the filesystem's idmapping. +Let's see some examples with caller/filesystem idmapping but without mount +idmappings. This will exhibit some problems we can hit. After that we will +revisit/reconsider these examples, this time using mount idmappings, to see how +they can solve the problems we observed before. + Example 1 ~~~~~~~~~ -- cgit v1.2.3