linux-kernel - [RFC PATCH 0/3] vfs, overlayfs: Fix syncfs() to return error

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Date:   Wed, 16 Dec 2020 18:31:46 -0500
From:   Vivek Goyal <vgoyal@...hat.com>
To:     linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-unionfs@...r.kernel.org
Cc:     jlayton@...nel.org, vgoyal@...hat.com, amir73il@...il.com,
        sargun@...gun.me, miklos@...redi.hu, willy@...radead.org,
        jack@...e.cz, neilb@...e.com, viro@...iv.linux.org.uk
Subject: [RFC PATCH 0/3] vfs, overlayfs: Fix syncfs() to return error

Hi,

This is V2 of patches which tries to fix syncfs() for overlayfs to
return error code when sync_filesystem(upper_sb) returns error or
there are writeback errors on upper_sb.

I posted V1 of patch here.

https://lore.kernel.org/linux-fsdevel/20201216143802.GA10550@redhat.com/

This is just compile tested patch series. Trying to get early feedback
to figure out what direction to move in to fix this issue. 

Thanks
Vivek

Vivek Goyal (3):
  vfs: add new f_op->syncfs vector
  overlayfs: Implement f_op->syncfs() call
  overlayfs: Check writeback errors w.r.t upper in ->syncfs()

 fs/overlayfs/file.c      |  1 +
 fs/overlayfs/overlayfs.h |  3 +++
 fs/overlayfs/ovl_entry.h |  2 ++
 fs/overlayfs/readdir.c   |  1 +
 fs/overlayfs/super.c     | 41 +++++++++++++++++++++++++++++++++++++++-
 fs/sync.c                | 29 +++++++++++++++++++---------
 include/linux/fs.h       |  1 +
 7 files changed, 68 insertions(+), 10 deletions(-)

-- 
2.25.4