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Filename Latest commit message Latest commit date
Eric Biggers 403731b15a ANDROID: ext4, f2fs: enable direct I/O with inline encryption 
ext4 and f2fs have traditionally not supported direct I/O on encrypted
files, since it's difficult to implement with the traditional
filesystem-layer encryption.  But when inline encryption is used
instead, it's straightforward to support direct I/O, as long as the I/O
is fully filesystem-block-aligned.  Add support for it by:

- Making the two generic direct I/O implementations in the kernel,
  __blockdev_direct_IO() and iomap_dio_rw(), set the encryption context
  on bios for inline-encrypted files.  __blockdev_direct_IO() is used by
  f2fs, and was used by ext4 in kernel v5.4 and earlier.  iomap_dio_rw()
  is used by ext4 in kernel v5.5 and later.

- Making ext4 and f2fs allow direct I/O to encrypted files (rather the
  current behavior of falling back to buffered I/O) when the file is
  using inline encryption and the I/O is fully filesystem-block-aligned.

Bug: 137270441
Change-Id: I4c8f7497eb8f829d03611d24281113d68c21d4d1
Signed-off-by: Eric Biggers <ebiggers@google.com>
2020-01-24 10:52:54 -08:00
arch Revert "ANDROID: security,perf: Allow further restriction of perf_event_open" 2020-01-23 22:02:32 +00:00
block ANDROID: block: export symbols needed for modules to use inline crypto 2020-01-24 10:52:54 -08:00
certs PKCS#7: Refactor verify_pkcs7_signature() 2019-08-05 18:40:18 -04:00
crypto crypto: algif_skcipher - Use chunksize instead of blocksize 2020-01-17 19:48:46 +01:00
Documentation Revert "ANDROID: security,perf: Allow further restriction of perf_event_open" 2020-01-23 22:02:32 +00:00
drivers FROMLIST: scsi: ufs: add program_key() variant op 2020-01-24 10:52:54 -08:00
fs ANDROID: ext4, f2fs: enable direct I/O with inline encryption 2020-01-24 10:52:54 -08:00
include ANDROID: block: fix some inline crypto bugs 2020-01-24 10:52:54 -08:00
init This is the 5.4.14 stable release 2020-01-23 08:37:43 +01:00
ipc Merge 5.4-rc1-prelrease into android-mainline 2019-10-02 17:58:47 +02:00
kernel Revert "ANDROID: security,perf: Allow further restriction of perf_event_open" 2020-01-23 22:02:32 +00:00
lib FROMLIST: lib/list_sort: fix function type mismatches 2020-01-15 20:49:27 +00:00
LICENSES LICENSES: Rename other to deprecated 2019-05-03 06:34:32 -06:00
mm UPSTREAM: mm/page_io.c: annotate refault stalls from swap_readpage 2020-01-24 17:54:59 +00:00
net This is the 5.4.14 stable release 2020-01-23 08:37:43 +01:00
samples samples: bpf: fix syscall_tp due to unused syscall 2020-01-12 12:21:26 +01:00
scripts This is the 5.4.13 stable release 2020-01-17 23:38:39 +01:00
security FROMLIST: security: selinux: allow per-file labelling for binderfs 2020-01-23 22:38:12 +00:00
sound This is the 5.4.14 stable release 2020-01-23 08:37:43 +01:00
tools perf script: Fix --reltime with --time 2020-01-23 08:23:01 +01:00
usr gen_initramfs_list.sh: fix 'bad variable name' error 2020-01-09 10:20:00 +01:00
virt KVM: arm/arm64: Properly handle faulting of device mappings 2019-12-31 16:46:24 +01:00
.clang-format clang-format: Update with the latest for_each macro list 2019-08-31 10:00:51 +02:00
.cocciconfig
.get_maintainer.ignore Opt out of scripts/get_maintainer.pl 2019-05-16 10:53:40 -07:00
.gitattributes
.gitignore Revert "ANDROID: Revert "Merge tag 'modules-for-v5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux"" 2019-11-13 10:14:45 +00:00
.mailmap ARM: SoC fixes 2019-11-10 13:41:59 -08:00
abi_gki_aarch64.xml ANDROID: block: provide key size as input to inline crypto APIs 2020-01-22 04:31:41 +00:00
abi_gki_aarch64_whitelist ANDROID: update ABI whitelist 2020-01-16 13:06:58 -08:00
build.config.aarch64 ANDROID: refactor build.config files to remove duplication 2019-08-30 14:55:29 +01:00
build.config.allmodconfig ANDROID: Don't base allmodconfig on gki_defconfig 2019-12-05 13:18:31 +00:00
build.config.allmodconfig.aarch64 ANDROID: create build.configs for allmodconfig 2019-09-04 15:49:40 +00:00
build.config.allmodconfig.x86_64 ANDROID: create build.configs for allmodconfig 2019-09-04 15:49:40 +00:00
build.config.common ANDROID: clang: update to 10.0.1 2019-11-27 12:49:08 -08:00
build.config.cuttlefish.aarch64 ANDROID: build config for cuttlefish ramdisk 2020-01-22 00:09:05 +00:00
build.config.cuttlefish.x86_64 ANDROID: build config for cuttlefish ramdisk 2020-01-22 00:09:05 +00:00
build.config.db845c ANDROID: db845c: Add build config 2020-01-15 21:13:30 +00:00
build.config.gki ANDROID: refactor build.config files to remove duplication 2019-08-30 14:55:29 +01:00
build.config.gki.aarch64 ANDROID: add initial ABI whitelist for android-5.4 2019-12-18 10:56:40 +00:00
build.config.gki.x86_64 ANDROID: refactor build.config files to remove duplication 2019-08-30 14:55:29 +01:00
build.config.x86_64 ANDROID: refactor build.config files to remove duplication 2019-08-30 14:55:29 +01:00
COPYING
CREDITS MAINTAINERS: Remove Simon as Renesas SoC Co-Maintainer 2019-10-10 08:12:51 -07:00
cuttlefish.fragment ANDROID: gki: Make GKI specific modules builtins 2020-01-23 02:20:52 +00:00
Kbuild kbuild: do not descend to ./Kbuild when cleaning 2019-08-21 21:03:58 +09:00
Kconfig docs: kbuild: convert docs to ReST and rename to *.rst 2019-06-14 14:21:21 -06:00
MAINTAINERS MAINTAINERS: Append missed file to the database 2020-01-17 19:48:28 +01:00
Makefile This is the 5.4.14 stable release 2020-01-23 08:37:43 +01:00
README
README.md ANDROID: Fix typo for FROMLIST: section 2019-10-29 20:31:07 +00:00

README.md

How do I submit patches to Android Common Kernels

  1. BEST: Make all of your changes to upstream Linux. If appropriate, backport to the stable releases. These patches will be merged automatically in the corresponding common kernels. If the patch is already in upstream Linux, post a backport of the patch that conforms to the patch requirements below.

  2. LESS GOOD: Develop your patches out-of-tree (from an upstream Linux point-of-view). Unless these are fixing an Android-specific bug, these are very unlikely to be accepted unless they have been coordinated with kernel-team@android.com. If you want to proceed, post a patch that conforms to the patch requirements below.

Common Kernel patch requirements

  • All patches must conform to the Linux kernel coding standards and pass script/checkpatch.pl
  • Patches shall not break gki_defconfig or allmodconfig builds for arm, arm64, x86, x86_64 architectures (see https://source.android.com/setup/build/building-kernels)
  • If the patch is not merged from an upstream branch, the subject must be tagged with the type of patch: UPSTREAM:, BACKPORT:, FROMGIT:, FROMLIST:, or ANDROID:.
  • All patches must have a Change-Id: tag (see https://gerrit-review.googlesource.com/Documentation/user-changeid.html)
  • If an Android bug has been assigned, there must be a Bug: tag.
  • All patches must have a Signed-off-by: tag by the author and the submitter

Additional requirements are listed below based on patch type

Requirements for backports from mainline Linux: UPSTREAM:, BACKPORT:

  • If the patch is a cherry-pick from Linux mainline with no changes at all
    • tag the patch subject with UPSTREAM:.
    • add upstream commit information with a (cherry-picked from ...) line
    • Example:
      • if the upstream commit message is
        important patch from upstream

        This is the detailed description of the important patch

        Signed-off-by: Fred Jones <fred.jones@foo.org>

    - then Joe Smith would upload the patch for the common kernel as

        UPSTREAM: important patch from upstream

        This is the detailed description of the important patch

        Signed-off-by: Fred Jones <fred.jones@foo.org>

        Bug: 135791357
        Change-Id: I4caaaa566ea080fa148c5e768bb1a0b6f7201c01
        (cherry-picked from c31e73121f4c1ec41143423ac6ce3ce6dafdcec1)
        Signed-off-by: Joe Smith <joe.smith@foo.org>
  • If the patch requires any changes from the upstream version, tag the patch with BACKPORT: instead of UPSTREAM:.
    • use the same tags as UPSTREAM:
    • add comments about the changes under the (cherry-picked from ...) line
    • Example:
        BACKPORT: important patch from upstream

        This is the detailed description of the important patch

        Signed-off-by: Fred Jones <fred.jones@foo.org>

        Bug: 135791357
        Change-Id: I4caaaa566ea080fa148c5e768bb1a0b6f7201c01
        (cherry-picked from c31e73121f4c1ec41143423ac6ce3ce6dafdcec1)
        [ Resolved minor conflict in drivers/foo/bar.c ]
        Signed-off-by: Joe Smith <joe.smith@foo.org>

Requirements for other backports: FROMGIT:, FROMLIST:,

  • If the patch has been merged into an upstream maintainer tree, but has not yet been merged into Linux mainline
    • tag the patch subject with FROMGIT:
    • add info on where the patch came from as (cherry picked from commit <sha1> <repo> <branch>). This must be a stable maintainer branch (not rebased, so don't use linux-next for example).
    • if changes were required, use BACKPORT: FROMGIT:
    • Example:
      • if the commit message in the maintainer tree is
        important patch from upstream

        This is the detailed description of the important patch

        Signed-off-by: Fred Jones <fred.jones@foo.org>

    - then Joe Smith would upload the patch for the common kernel as

        FROMGIT: important patch from upstream

        This is the detailed description of the important patch

        Signed-off-by: Fred Jones <fred.jones@foo.org>

        Bug: 135791357
        (cherry picked from commit 878a2fd9de10b03d11d2f622250285c7e63deace
         https://git.kernel.org/pub/scm/linux/kernel/git/foo/bar.git test-branch)
        Change-Id: I4caaaa566ea080fa148c5e768bb1a0b6f7201c01
        Signed-off-by: Joe Smith <joe.smith@foo.org>
  • If the patch has been submitted to LKML, but not accepted into any maintainer tree
    • tag the patch subject with FROMLIST:
    • add a Link: tag with a link to the submittal on lore.kernel.org
    • if changes were required, use BACKPORT: FROMLIST:
    • Example:
        FROMLIST: important patch from upstream

        This is the detailed description of the important patch

        Signed-off-by: Fred Jones <fred.jones@foo.org>

        Bug: 135791357
        Link: https://lore.kernel.org/lkml/20190619171517.GA17557@someone.com/
        Change-Id: I4caaaa566ea080fa148c5e768bb1a0b6f7201c01
        Signed-off-by: Joe Smith <joe.smith@foo.org>

Requirements for Android-specific patches: ANDROID:

  • If the patch is fixing a bug to Android-specific code
    • tag the patch subject with ANDROID:
    • add a Fixes: tag that cites the patch with the bug
    • Example:
        ANDROID: fix android-specific bug in foobar.c

        This is the detailed description of the important fix

        Fixes: 1234abcd2468 ("foobar: add cool feature")
        Change-Id: I4caaaa566ea080fa148c5e768bb1a0b6f7201c01
        Signed-off-by: Joe Smith <joe.smith@foo.org>
  • If the patch is a new feature
    • tag the patch subject with ANDROID:
    • add a Bug: tag with the Android bug (required for android-specific features)