linux-kernel - [PATCH v2 0/8] ref_tracker: add ability to register a debugfs file for a ref_tracker

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20250415-reftrack-dbgfs-v2-0-b18c4abd122f@kernel.org>
Date: Tue, 15 Apr 2025 14:49:38 -0400
From: Jeff Layton <jlayton@...nel.org>
To: Andrew Morton <akpm@...ux-foundation.org>, 
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
 Simon Horman <horms@...nel.org>
Cc: Kuniyuki Iwashima <kuniyu@...zon.com>, Qasim Ijaz <qasdev00@...il.com>, 
 Nathan Chancellor <nathan@...nel.org>, Andrew Lunn <andrew@...n.ch>, 
 linux-kernel@...r.kernel.org, netdev@...r.kernel.org, 
 Jeff Layton <jlayton@...nel.org>, 
 Thomas Weißschuh <thomas.weissschuh@...utronix.de>
Subject: [PATCH v2 0/8] ref_tracker: add ability to register a debugfs file
 for a ref_tracker_dir

I had previously sent some patches to add debugfs files for the net
namespace refcount trackers, but Andrew convinced me to make this more
generic and better-integrated into the ref_tracker infrastructure.

This adds a new ref_tracker_dir_debugfs() call that subsystems can call
to finalize the name of their dir and register a debugfs file for it.
The last two patches add these calls for the netns and netdev
ref_trackers.

Signed-off-by: Jeff Layton <jlayton@...nel.org>
---
Changes in v2:
- Add patch to do %pK -> %p conversion in ref_tracker.c
- Pass in output function to pr_ostream() instead of if statement
- Widen ref_tracker_dir.name to 64 bytes to accomodate unique names
- Eliminate error handling with debugfs manipulation
- Incorporate pointer value into netdev name
- Link to v1: https://lore.kernel.org/r/20250414-reftrack-dbgfs-v1-0-f03585832203@kernel.org

---
Jeff Layton (8):
      ref_tracker: don't use %pK in pr_ostream() output
      ref_tracker: add a top level debugfs directory for ref_tracker
      ref_tracker: have callers pass output function to pr_ostream()
      ref_tracker: allow pr_ostream() to print directly to a seq_file
      ref_tracker: add ability to register a file in debugfs for a ref_tracker_dir
      net: add ref_tracker_dir_debugfs() calls for netns refcount tracking
      ref_tracker: widen the ref_tracker_dir.name field
      net: register debugfs file for net_device refcnt tracker

 include/linux/ref_tracker.h |  15 ++++-
 lib/ref_tracker.c           | 153 +++++++++++++++++++++++++++++++++++++++-----
 net/core/dev.c              |   6 +-
 net/core/net_namespace.c    |  34 +++++++++-
 4 files changed, 190 insertions(+), 18 deletions(-)
---
base-commit: 695caca9345a160ecd9645abab8e70cfe849e9ff
change-id: 20250413-reftrack-dbgfs-3767b303e2fa

Best regards,
-- 
Jeff Layton <jlayton@...nel.org>