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Eric Biggers f0a5b1cce7 ext4: add support for IV_INO_LBLK_64 encryption policies
IV_INO_LBLK_64 encryption policies have special requirements from the
filesystem beyond those of the existing encryption policies:

- Inode numbers must never change, even if the filesystem is resized.
- Inode numbers must be <= 32 bits.
- File logical block numbers must be <= 32 bits.

ext4 has 32-bit inode and file logical block numbers.  However,
resize2fs can re-number inodes when shrinking an ext4 filesystem.

However, typically the people who would want to use this format don't
care about filesystem shrinking.  They'd be fine with a solution that
just prevents the filesystem from being shrunk.

Therefore, add a new feature flag EXT4_FEATURE_COMPAT_STABLE_INODES that
will do exactly that.  Then wire up the fscrypt_operations to expose
this flag to fs/crypto/, so that it allows IV_INO_LBLK_64 policies when
this flag is set.

Acked-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Eric Biggers <ebiggers@google.com>
2020-01-08 15:26:58 -08:00
arch
block block: set the zone size in blk_revalidate_disk_zones atomically 2020-01-07 16:02:50 -08:00
certs
crypto
Documentation fscrypt: add support for IV_INO_LBLK_64 policies 2020-01-08 15:26:58 -08:00
drivers null_blk: remove unused variable warning on !CONFIG_BLK_DEV_ZONED 2020-01-07 16:02:50 -08:00
fs ext4: add support for IV_INO_LBLK_64 encryption policies 2020-01-08 15:26:58 -08:00
include fscrypt: add support for IV_INO_LBLK_64 policies 2020-01-08 15:26:58 -08:00
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sound ALSA: hda - Fix pending unsol events at shutdown 2019-12-13 08:43:27 +01:00
tools kselftest: Fix NULL INSTALL_PATH for TARGETS runlist 2019-12-13 08:43:31 +01:00
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Makefile Linux 5.4.3 2019-12-13 08:43:32 +01:00
README

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 Restructured Text 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.