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Christian Brauner 91d837cae3
pidfs: support xattrs on pidfds
Now that we have a way to persist information for pidfs dentries we can
start supporting extended attributes on pidfds. This will allow
userspace to attach meta information to tasks.

One natural extension would be to introduce a custom pidfs.* extended
attribute space and allow for the inheritance of extended attributes
across fork() and exec().

The first simple scheme will allow privileged userspace to set trusted
extended attributes on pidfs inodes.

Link: https://lore.kernel.org/20250618-work-pidfs-persistent-v2-12-98f3456fd552@kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
History 2025-06-23 12:21:37 +02:00
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Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.