[PATCH v8 00/13] module: core code clean up

Aaron Tomlin
2022-02-22T14:13:13Z

Hi Luis, Christophe,

As per your suggestion [1], this is an attempt to refactor and split
optional code out of core module support code into separate components.
This version is based on Linus' commit 7993e65fdd0f ("Merge tag
'mtd/fixes-for-5.17-rc5' of
git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux").

Hopefully this iteration is all right. Please let me know your thoughts.

Changes since v7 [2]

- Removed redundant ifdef CONFIG_MODULES and endif pairing from
kernel/module/Makefile

Changes since v6 [3]

- Moved KCOV_INSTRUMENT_module.o out of kernel/Makefile into
kernel/module/Makefile (Christophe Leroy)
- Moved kernel/module/signature.c back into kernel/
(Christophe Leroy)
- Fixed Oops in add_kallsyms() due to an invalid pointer assignment
(Christophe Leroy)

Changes since v5 [4]:

- Updated MAINTAINERS to include the entire kernel/module/ directory
(Christophe Leroy)
- Reintroduce commit a97ac8cb24a3 ("module: fix signature check failures
when using in-kernel decompression") (Michal Suchánek)
- Refactored code to address some (i.e.
--ignore=MULTIPLE_ASSIGNMENTS,ASSIGN_IN_IF was used) style violations
e.g. "Alignment should match open parenthesis", reported by
scripts/checkpatch.pl --strict (Christophe Leroy)
- Used PAGE_ALIGN() and PAGE_ALIGNED() instead (Christophe Leroy)
- Removed sig_enforce from include/linux/module.h as it is only
used in kernel/module/signing.c (Christophe Leroy)
- Added static keyword for anything not used outside a source file
(Christophe Leroy)
- Moved mod_sysfs_teardown() to kernel/module/sysfs.c (Christophe Leroy)
- Removed kdb_modules from kernel/debug/kdb/kdb_private.h
(Christophe Leroy)

Changes since v4 [5]:

- Moved is_livepatch_module() and set_livepatch_module() to
kernel/module/livepatch.c
- Addressed minor compiler warning concerning
kernel/module/internal.h (0-day)
- Resolved style violations reported by scripts/checkpatch.pl
- Dropped patch 5 [6] so external patch [7] can be applied at
a later date post merge into module-next (Christophe Leroy)

Changes since v3 [8]:

- Refactored both is_livepatch_module() and set_livepatch_module(),
respectively, to use IS_ENABLED(CONFIG_LIVEPATCH) (Joe Perches)
- Addressed various compiler warnings e.g., no previous prototype (0-day)

Changes since v2 [9]:

- Moved module decompress support to a separate file
- Made check_modinfo_livepatch() generic (Petr Mladek)
- Removed filename from each newly created file (Luis Chamberlain)
- Addressed some (i.e. --ignore=ASSIGN_IN_IF,AVOID_BUG was used)
minor scripts/checkpatch.pl concerns e.g., use strscpy over
strlcpy and missing a blank line after declarations (Allen)

Changes since v1 [10]:

- Moved module version support code into a new file

[1]: https://lore.kernel.org/lkml/YbEZ4HgSYQEPuRmS@bombadil.infradead.org/
[2]: https://lore.kernel.org/lkml/20220222130911.1348513-1-atomlin@redhat.com/
[3]: https://lore.kernel.org/lkml/20220218212511.887059-1-atomlin@redhat.com/
[4]: https://lore.kernel.org/lkml/20220209170358.3266629-1-atomlin@redhat.com/
[5]: https://lore.kernel.org/lkml/20220130213214.1042497-1-atomlin@redhat.com/
[6]: https://lore.kernel.org/lkml/20220130213214.1042497-6-atomlin@redhat.com/
[7]: https://lore.kernel.org/lkml/203348805c9ac9851d8939d15cb9802ef047b5e2.1643919758.git.christophe.leroy@csgroup.eu/
[8]: https://lore.kernel.org/lkml/20220128203934.600247-1-atomlin@redhat.com/
[9]: https://lore.kernel.org/lkml/20220106234319.2067842-1-atomlin@redhat.com/
[10]: https://lore.kernel.org/lkml/20211228213041.1356334-1-atomlin@redhat.com/

Aaron Tomlin (13):
module: Move all into module/
module: Simple refactor in preparation for split
module: Make internal.h and decompress.c more compliant
module: Move livepatch support to a separate file
module: Move latched RB-tree support to a separate file
module: Move strict rwx support to a separate file
module: Move extra signature support out of core code
module: Move kmemleak support to a separate file
module: Move kallsyms support into a separate file
module: Move procfs support into a separate file
module: Move sysfs support into a separate file
module: Move kdb_modules list out of core code
module: Move version support into a separate file

MAINTAINERS | 2 +-
include/linux/module.h | 9 +-
kernel/Makefile | 5 +-
kernel/debug/kdb/kdb_main.c | 5 +
kernel/debug/kdb/kdb_private.h | 4 -
kernel/module-internal.h | 50 -
kernel/module/Makefile | 20 +
kernel/module/debug_kmemleak.c | 30 +
.../decompress.c} | 5 +-
kernel/module/internal.h | 275 +++
kernel/module/kallsyms.c | 506 +++++
kernel/module/livepatch.c | 74 +
kernel/{module.c => module/main.c} | 1856 +----------------
kernel/module/procfs.c | 142 ++
kernel/module/signing.c | 122 ++
kernel/module/strict_rwx.c | 85 +
kernel/module/sysfs.c | 436 ++++
kernel/module/tree_lookup.c | 109 +
kernel/module/version.c | 109 +
kernel/module_signing.c | 45 -
20 files changed, 2007 insertions(+), 1882 deletions(-)
delete mode 100644 kernel/module-internal.h
create mode 100644 kernel/module/Makefile
create mode 100644 kernel/module/debug_kmemleak.c
rename kernel/{module_decompress.c => module/decompress.c} (99%)
create mode 100644 kernel/module/internal.h
create mode 100644 kernel/module/kallsyms.c
create mode 100644 kernel/module/livepatch.c
rename kernel/{module.c => module/main.c} (64%)
create mode 100644 kernel/module/procfs.c
create mode 100644 kernel/module/signing.c
create mode 100644 kernel/module/strict_rwx.c
create mode 100644 kernel/module/sysfs.c
create mode 100644 kernel/module/tree_lookup.c
create mode 100644 kernel/module/version.c
delete mode 100644 kernel/module_signing.c

base-commit: 7993e65fdd0fe07beb9f36f998f9bbef2c0ee391
--
2.34.1