[PATCH v3 0/2] btrfs: add error injection support for checksum verification

[Song Chen <chensong_2000@126.com>]

This patchset adds fault injection support for btrfs_data_csum_ok,
enabling controlled simulation of checksum mismatches to test btrfs
silent data corruption detection and reporting paths.

The first patch extends the error injection framework with a new type,
EI_ETYPE_FALSE, which allows bool-returning functions to be overridden
with a false return value directly.

The second patch marks btrfs_data_csum_ok with ALLOW_ERROR_INJECTION
using this new type.


Song Chen (2):
  error-injection: Introduce EI_ETYPE_FALSE for fail_function
  btrfs: Allow error injection on btrfs_data_csum_ok

 Documentation/fault-injection/fault-injection.rst | 3 +++
 fs/btrfs/inode.c                                  | 1 +
 include/asm-generic/error-injection.h             | 1 +
 kernel/fail_function.c                            | 2 ++
 lib/error-inject.c                                | 2 ++
 5 files changed, 9 insertions(+)

---
changelog:
v1 --- v2:
Add a parent field to struct fei_attr.

v2 --- v3
1, Withdraw adding parent field in fet_attr in v2.
2, Update commit message of second patch regarding sashiko-bot's
   suggestion in [1].
3, Add EI_ETYPE_FALSE in error_type_string regarding sashiko-bot's
   suggestion in [2].
4, Add EI_ETYPE_FALSE in Documentation/fault-injection/fault-injection.rst
   regarding sashiko-bot's suggestion in [2].

[1] https://lore.kernel.org/all/20260724022150.D2D811F000E9@smtp.kernel.org/
[2] https://lore.kernel.org/all/20260724022044.F31F11F000E9@smtp.kernel.org/
-- 
2.43.0