[PATCH v3 0/6] Refactor *_fs_sysfs_* helpers

[Zorro Lang <zlang@kernel.org>]

As we talked in:
  https://lore.kernel.org/fstests/amhKovVDjwawoWdQ@zlang-mailbox/

This patchset refactors two redundant and messy sets of *_fs_sysfs_* helpers
(PATCH 1/6 2/6), move btrfs specific sysfs policy helpers to common/btrfs
(PATCH 3/6), introduces helpers for /sys/fs/$FSTYP/features (PATCH 4/6),
and replaces the original btrfs-specific helpers with these common ones
(PATCH 6/6).

V2 did below changes:

1) According to review point:
     https://lore.kernel.org/fstests/aqjsBs6QUtIukk05@infradead.org/
   split original patch 1/5 to two patches 1/6 and 2/6.
2) According to review point:
     https://lore.kernel.org/fstests/aqjsZZD4RPVK-uBn@infradead.org/
   rename functions in common/sysfs and move them to common/btrfs.

V3 did below changes:
1) Address Christoph's review points on [PATCH 2/6] by introducing
   _require_{test,scratch}_sysfs_dev_attr and wrapping lines that were too
   long (Waiting for RVB).
2) Since an upcoming test case (btrfs/363) is also affected by [PATCH 6/6],
   I have rebased patch 6/6 and the entire patchset onto the latest
   patches-in-queue branch.

Thanks,
Zorro

Zorro Lang (6):
  fstests: rename _*_fs_sysfs_attr helpers to _*_fs_sysfs_dev_attr
  fstests: consolidate _require_fs_sysfs and _require_fs_sysfs_dev_attr
  common: move btrfs-only sysfs policy helpers out of common/sysfs
  common/rc: add helpers for /sys/fs/$FSTYP/features/
  common/rc: use common helper in _require_fanotify_ioerrors for f2fs
  fstests: replace btrfs specific helpers with common sysfs helpers

 common/btrfs      | 176 ++++++++++++++++++++++++++++++++++++----------
 common/rc         | 109 +++++++++++++++++++++-------
 common/sysfs      | 145 --------------------------------------
 common/xfs        |  24 ++++---
 tests/btrfs/010   |   3 +-
 tests/btrfs/055   |   2 +-
 tests/btrfs/056   |   2 +-
 tests/btrfs/112   |   2 +-
 tests/btrfs/131   |   2 +-
 tests/btrfs/165   |   2 +-
 tests/btrfs/188   |   2 +-
 tests/btrfs/192   |   2 +-
 tests/btrfs/201   |   2 +-
 tests/btrfs/205   |   2 +-
 tests/btrfs/209   |   2 +-
 tests/btrfs/211   |   2 +-
 tests/btrfs/219   |   3 +-
 tests/btrfs/231   |   2 +-
 tests/btrfs/253   |  29 ++++----
 tests/btrfs/285   |   3 +-
 tests/btrfs/296   |   8 +--
 tests/btrfs/304   |   4 +-
 tests/btrfs/305   |   4 +-
 tests/btrfs/306   |   4 +-
 tests/btrfs/307   |   4 +-
 tests/btrfs/308   |   4 +-
 tests/btrfs/311   |   2 +-
 tests/btrfs/313   |   2 +-
 tests/btrfs/314   |   2 +-
 tests/btrfs/315   |   2 +-
 tests/btrfs/329   |   5 +-
 tests/btrfs/334   |   5 +-
 tests/btrfs/342   |   2 +-
 tests/btrfs/352   |   2 +-
 tests/btrfs/363   |   2 +-
 tests/f2fs/025    |   2 +-
 tests/generic/098 |   2 +-
 tests/generic/101 |   2 +-
 tests/xfs/006     |   4 +-
 tests/xfs/177     |   4 +-
 tests/xfs/264     |  14 ++--
 tests/xfs/668     |   6 +-
 tests/xfs/669     |   6 +-
 tests/xfs/670     |   2 +-
 44 files changed, 307 insertions(+), 303 deletions(-)
 delete mode 100644 common/sysfs

-- 
2.56.0