[PATCH 0/3] btrfs: avoid data races when accessing an inode's delayed_node

[fdmanana@kernel.org]

From: Filipe Manana <fdmanana@suse.com>

We do have some data races when accessing an inode's delayed_node, namely
we use READ_ONCE() in a couple places while there's no pairing WRITE_ONCE()
anywhere, and in one place (btrfs_dirty_inode()) we neither user READ_ONCE()
nor take the lock that protects the delayed_node. So fix these and add
helpers to access and update an inode's delayed_node.

Filipe Manana (3):
  btrfs: always set an inode's delayed_inode with WRITE_ONCE()
  btrfs: use READ_ONCE() when accessing delayed_node at btrfs_dirty_node()
  btrfs: add and use helpers to get and set an inode's delayed_node

 fs/btrfs/btrfs_inode.h   | 12 ++++++++++++
 fs/btrfs/delayed-inode.c | 10 +++++-----
 fs/btrfs/inode.c         |  4 ++--
 3 files changed, 19 insertions(+), 7 deletions(-)

-- 
2.43.0