linux-kernel - [PATCH v2 0/2] fs: allow statmount to fetch the sb->s

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Message-Id: <20241106-statmount-v2-0-93ba2aad38d1@kernel.org>
Date: Wed, 06 Nov 2024 14:53:04 -0500
From: Jeff Layton <jlayton@...nel.org>
To: Alexander Viro <viro@...iv.linux.org.uk>, 
 Christian Brauner <brauner@...nel.org>, Jan Kara <jack@...e.cz>
Cc: Josef Bacik <josef@...icpanda.com>, linux-fsdevel@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Jeff Layton <jlayton@...nel.org>
Subject: [PATCH v2 0/2] fs: allow statmount to fetch the sb->s_subtype
 field

Meta has some internal logging that scrapes /proc/self/mountinfo today.
I'd like to convert it to use listmount()/statmount(), so we can do a
better job of monitoring with containers. We're missing some fields
though. This patchset adds them.

Signed-off-by: Jeff Layton <jlayton@...nel.org>
---
Changes in v2:
- make statmount_fs_subtype
- return fast if no subtype is emitted
- new patch to allow statmount() to return devicename
- Link to v1: https://lore.kernel.org/r/20241106-statmount-v1-1-b93bafd97621@kernel.org

---
Jeff Layton (2):
      fs: add the ability for statmount() to report the fs_subtype
      fs: add the ability for statmount() to report the mount devicename

 fs/namespace.c             | 42 +++++++++++++++++++++++++++++++++++++++++-
 include/uapi/linux/mount.h |  6 +++++-
 2 files changed, 46 insertions(+), 2 deletions(-)
---
base-commit: 26213e1a6caa5a7f508b919059b0122b451f4dfe
change-id: 20241106-statmount-3f91a7ed75fa

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