linux-kernel - add file system helpers that take kernel pointers for the init code

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Message-Id: <20200720155902.181712-1-hch@lst.de>
Date:   Mon, 20 Jul 2020 17:58:38 +0200
From:   Christoph Hellwig <hch@....de>
To:     Al Viro <viro@...iv.linux.org.uk>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        linux-kernel@...r.kernel.org, linux-raid@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-api@...r.kernel.org
Subject: add file system helpers that take kernel pointers for the init code

Hi Al,

currently a lot of the file system calls in the early in code (and the
devtmpfs kthread) rely on the implicit set_fs(KERNEL_DS) during boot.
This is one of the few last remaining places we need to deal with to kill
off set_fs entirely, so this series adds new helpers that take kernel
pointers.  That is mostly done by pushing the getname() call further up
the stack so that we can add variants using getname_kernel() without
duplicating code.

The series sits on top of my previous

  "decruft the early init / initrd / initramfs code v2"

series.


Git tree:

    git://git.infradead.org/users/hch/misc.git kern_path

Gitweb:

    http://git.infradead.org/users/hch/misc.git/shortlog/refs/heads/kern_path


Diffstat:
 drivers/base/devtmpfs.c    |    8 +-
 drivers/md/md-autodetect.c |    2 
 fs/coredump.c              |    2 
 fs/fs_parser.c             |    1 
 fs/internal.h              |   12 ---
 fs/namei.c                 |  166 +++++++++++++++++++++++++++++++--------------
 fs/namespace.c             |  134 +++++++++++++++++++++---------------
 fs/open.c                  |  149 ++++++++++++++++++++++++++++------------
 fs/stat.c                  |   92 ++++++++++++------------
 fs/utimes.c                |   19 +++--
 include/linux/fs.h         |   39 +++++-----
 include/linux/syscalls.h   |   82 ----------------------
 init/do_mounts.c           |   12 +--
 init/do_mounts.h           |    4 -
 init/do_mounts_initrd.c    |   26 +++----
 init/do_mounts_rd.c        |    2 
 init/initramfs.c           |   27 +++----
 init/main.c                |    9 --
 init/noinitramfs.c         |    9 +-
 kernel/uid16.c             |   15 ----
 20 files changed, 434 insertions(+), 376 deletions(-)