[PATCH v2 0/3] CONFIG_VFS_DEBUG at last

[Mateusz Guzik <mjguzik@gmail.com>]

This adds a super basic version just to get the mechanism going and
adds sample usage.

The macro set is incomplete (e.g., lack of locking macros) and
dump_inode routine fails to dump any state yet, to be implemented(tm).

I think despite the primitive state this is complete enough to start
sprinkling warns as necessary.

v2:
- correct may_open
- fixed up condition reporting:
before:
VFS_WARN_ON_INODE(__builtin_choose_expr((sizeof(int) ==
sizeof(*(8 ? ((void *)((long)(__builtin_strlen(link)) * 0l)) : (int
*)8))), __builtin_strlen(link), __fortify_strlen(link)) != linklen)
failed for inode ff32f7c350c8aec8
after:
VFS_WARN_ON_INODE(strlen(link) != linklen) failed for inode ff2b81ddca13f338

Mateusz Guzik (3):
  vfs: add initial support for CONFIG_VFS_DEBUG
  vfs: catch invalid modes in may_open()
  vfs: use the new debug macros in inode_set_cached_link()

 fs/namei.c               |  2 ++
 include/linux/fs.h       | 16 +++----------
 include/linux/vfsdebug.h | 49 ++++++++++++++++++++++++++++++++++++++++
 lib/Kconfig.debug        |  9 ++++++++
 4 files changed, 63 insertions(+), 13 deletions(-)
 create mode 100644 include/linux/vfsdebug.h

-- 
2.43.0