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Amir Goldstein 54fb347e83 ovl: verify index dir matches upper dir
An index dir contains persistent hardlinks to files in upper dir.
Therefore, we must never mount an existing index dir with a differnt
upper dir.

Store the upper root dir file handle in index dir inode when index
dir is created and verify the file handle before using an existing
index dir on mount.

Add an 'is_upper' flag to the overlay file handle encoding and set it
when encoding the upper root file handle. This is not critical for index
dir verification, but it is good practice towards a standard overlayfs
file handle format for NFS export.

Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2017-07-04 22:03:17 +02:00
Documentation A single GPIO patch fixing the compatible string for the 2017-06-23 17:40:41 -07:00
arch UUID/GUID updates: 2017-07-04 04:05:05 +02:00
block UUID/GUID updates: 2017-07-04 04:05:05 +02:00
certs
crypto crypto : asymmetric_keys : verify_pefile:zero memory content before freeing 2017-06-09 13:29:50 +10:00
drivers UUID/GUID updates: 2017-07-04 04:05:05 +02:00
firmware
fs ovl: verify index dir matches upper dir 2017-07-04 22:03:17 +02:00
include vfs: introduce inode 'inuse' lock 2017-07-04 22:03:16 +02:00
init
ipc
kernel UUID/GUID updates: 2017-07-04 04:05:05 +02:00
lib UUID/GUID updates: 2017-07-04 04:05:05 +02:00
mm UUID/GUID updates: 2017-07-04 04:05:05 +02:00
net igmp: add a missing spin_lock_init() 2017-06-20 15:51:57 -04:00
samples
scripts Kbuild fixes for v4.12 (2nd) 2017-06-24 16:18:00 -07:00
security UUID/GUID updates: 2017-07-04 04:05:05 +02:00
sound UUID/GUID updates: 2017-07-04 04:05:05 +02:00
tools UUID/GUID updates: 2017-07-04 04:05:05 +02:00
usr initramfs: fix disabling of initramfs (and its compression) 2017-06-02 15:07:37 -07:00
virt KVM: arm/arm64: Handle possible NULL stage2 pud when ageing pages 2017-06-06 15:28:40 +02:00
.cocciconfig
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MAINTAINERS UUID/GUID updates: 2017-07-04 04:05:05 +02:00
Makefile Linux 4.12-rc7 2017-06-25 18:30:05 -07:00
README

README

Linux kernel
============

This file was moved to Documentation/admin-guide/README.rst

Please notice that there are several guides for kernel developers and users.
These guides can be rendered in a number of formats, like HTML and PDF.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

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.