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04173501a6The namespace file handle struct nsfs_file_handle is uapi and userspace is expressly allowed to generate file handles without going through name_to_handle_at(). Allow userspace to generate a file handle where both the inode number and the namespace type are zero and just pass in the unique namespace id. The kernel uses the unified namespace tree to find the namespace and open the file handle. When the kernel creates a file handle via name_to_handle_at() it will always fill in the type and the inode number allowing userspace to retrieve core information. Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-14-2e6f823ebdc0@kernel.org Tested-by: syzbot@syzkaller.appspotmail.com Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Christian Brauner <brauner@kernel.org> |
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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.