From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 29ACD2459EF; Thu, 17 Apr 2025 13:11:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744895481; cv=none; b=ejRJSNGgbFpIBHMXBK8NNSQoIml0W89tbY/S86JTxveon3GgQRxdSE6bX+8chZa097LFBkMe8x/kJ3csK8PyjFrjla88Q5K0d5zCVnUhVBRD9dhFZiM1Znrx4jV3j/5tNO3Eda4xzprnW97185lfgSXeUE20k1UW9afuKxrFhag= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744895481; c=relaxed/simple; bh=OUxNWwrgg8j3G4t3OFx/R6btyXfDE8RJw7HclDZsGhs=; h=From:Subject:Date:Message-Id:MIME-Version:Content-Type:To:Cc; b=Yrw8dMzI7jniYfWtMTky7BCXmb642uYTu5m841+AudfEANukWXkAHGZPWGcBIDVkVOqIN+Kj/fw8pnH9o0xs7cIKxvoC+MDXo2dJVinppQ+lT4aAdvD3U5KgKyvJG1SVdOVEj+NsyVux9piZ7ZYgBlf1ohlJbtlu73C4s4iAE6Y= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=DvQDlgYU; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="DvQDlgYU" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 83B1BC4CEEB; Thu, 17 Apr 2025 13:11:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1744895480; bh=OUxNWwrgg8j3G4t3OFx/R6btyXfDE8RJw7HclDZsGhs=; h=From:Subject:Date:To:Cc:From; b=DvQDlgYUDPe1mX2ENKDI9+XTvQn/iPj1bO2WpAmSsAslei0e4jfLmPCAHc5zimuie wDGHWgQUOXhRYwviuU2nLgRJ8+e6LzgxEuE4zBTjJwuQYa0P9cK194JIM6581XBhpL H347j5nuabDiMOE0fOOCzRhUd6MxTbeKoF2o3PE/MZ+0R4Y0DSR9SgSTVHUKqi9Q7J DvC3GHNqlgtCMiY13tPHKHiNTv/GFNlLgRfMtTSTB46PAqxTjXFZ5FX2QKPQW/FOr4 5xByBWEZHGAdPIG6McNJZcPK6Xqg9OInVAOy5cPDpyuoHeR0HRldhH+atAEB4hq773 p6LtODri6XWAQ== From: Jeff Layton Subject: [PATCH v3 0/8] ref_tracker: add ability to register a debugfs file for a ref_tracker_dir Date: Thu, 17 Apr 2025 09:11:03 -0400 Message-Id: <20250417-reftrack-dbgfs-v3-0-c3159428c8fb@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-B4-Tracking: v=1; b=H4sIAOf9AGgC/2WMywqDMBBFf6XMuinJjKnSVf+jdJHoRINFSyKhR fz3RqHQx/LcyzkzRA6eI5x2MwROPvpxyED7HdSdGVoWvskMKFHLQpEI7KZg6l40tnVRUHksLUl idAaydM+/f2zByzVz5+M0hufWT2pd36niN5WUkMJJ0pWuCFHSuecw8O0whhbWVsJPX//5mH2rq rowtlGI7stfluUFZxaX1+0AAAA= X-Change-ID: 20250413-reftrack-dbgfs-3767b303e2fa To: Andrew Morton , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman Cc: Kuniyuki Iwashima , Qasim Ijaz , Nathan Chancellor , Andrew Lunn , linux-kernel@vger.kernel.org, netdev@vger.kernel.org, Jeff Layton , =?utf-8?q?Thomas_Wei=C3=9Fschuh?= X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=2122; i=jlayton@kernel.org; h=from:subject:message-id; bh=OUxNWwrgg8j3G4t3OFx/R6btyXfDE8RJw7HclDZsGhs=; b=kA0DAAgBAA5oQRlWghUByyZiAGgA/e7IMar3vmCgsyCLDC7IMa65WUNtIC07DtMKSrKE0INin okCMwQAAQgAHRYhBEvA17JEcbKhhOr10wAOaEEZVoIVBQJoAP3uAAoJEAAOaEEZVoIVMf0P/A/A c3HgXO1eZujzv4qdBLZoYLTDgQnOlO9R/Hv5E/0pBxBrvTVOxEc0PlQiI6vofGOJYBrTy0fdE2u 83eoJpc8i4KUp1P2IG7g5kUJT1KzOpAL8OyOCb4hAYFS4BalfeSG4AZ460bF8jEqwMqJXnD5FKn LsaaixCy2TBDcBZ1n905lYwOq9dS9cYKnb3ndJ976l5kjaX1QN79qXRaaknSK0+o0n7+91CsW+g f09/GHlZ2MuweKQ+DWIuQeymUTY5nf1Zb7GL7swnCl+j1yL3QxP6xvK1E9hR/rbjobCiofAd2Za qN3W1dcmmTz3BDpqWpcfOsHUgilPgBX9kSA0yMvK3LhI9JfQdhYR+h4pkfuNYZyuR7TqSizpYNh qbnuo6ljdKdK4zEj3Yc7UV64kzS4+xr/ellk8AdIHVJ4UZA0t8+sKfqD7YrNgUoeI9u+Fddf02s Y7IOPn3Rbb65kKuHm+oGsGUP0mJCmtbuW4kEz4kbk8rV+7BvzJCoF179MivZIDRYjIGAdtJpjtz 2Vmm9zVylv2hNV+lxITUdVH+mAcRX+Z4112tMirzXgIQljgcuQO1/dtsoEL59AF6IHkLC/uzPTk Jmpqba9WP1X6z22meI3rGr6fthoILMzuEyJzbPvIX/EsnifhVS8t+mE/eNP8nTu95gSS47U+0k0 jRcib X-Developer-Key: i=jlayton@kernel.org; a=openpgp; fpr=4BC0D7B24471B2A184EAF5D3000E684119568215 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 --- Changes in v3: - don't overwrite dir->name in ref_tracker_dir_debugfs - define REF_TRACKER_NAMESZ and use it when setting name - Link to v2: https://lore.kernel.org/r/20250415-reftrack-dbgfs-v2-0-b18c4abd122f@kernel.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 ref_tracker: widen the ref_tracker_dir.name field net: add ref_tracker_dir_debugfs() calls for netns refcount tracking net: register debugfs file for net_device refcnt tracker include/linux/ref_tracker.h | 17 ++++- lib/ref_tracker.c | 151 +++++++++++++++++++++++++++++++++++++++----- 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