[PATCH v5 7/7] xfs: Support setting FMODE_CAN_ATOMIC_WRITE
From: John Garry <john.g.garry@oracle.com>
Date: 2024-08-17 09:50:41
Also in:
linux-fsdevel, linux-xfs, lkml
Subsystem:
filesystems (vfs and infrastructure), the rest, xfs filesystem · Maintainers:
Alexander Viro, Christian Brauner, Linus Torvalds, Carlos Maiolino
For when an inode is enabled for atomic writes, set FMODE_CAN_ATOMIC_WRITE flag. Only direct IO is currently supported, so check for that also. We rely on the block layer to reject atomic writes which exceed the bdev request_queue limits, so don't bother checking any such thing here. Signed-off-by: John Garry <john.g.garry@oracle.com> --- fs/xfs/xfs_file.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+)
diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index 9b6530a4eb4a..3489d478809e 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c@@ -1149,6 +1149,18 @@ xfs_file_remap_range( return remapped > 0 ? remapped : ret; } +static bool xfs_file_open_can_atomicwrite( + struct inode *inode, + struct file *file) +{ + struct xfs_inode *ip = XFS_I(inode); + + if (!(file->f_flags & O_DIRECT)) + return false; + + return xfs_inode_has_atomicwrites(ip); +} + STATIC int xfs_file_open( struct inode *inode,
@@ -1157,6 +1169,8 @@ xfs_file_open( if (xfs_is_shutdown(XFS_M(inode->i_sb))) return -EIO; file->f_mode |= FMODE_NOWAIT | FMODE_CAN_ODIRECT; + if (xfs_file_open_can_atomicwrite(inode, file)) + file->f_mode |= FMODE_CAN_ATOMIC_WRITE; return generic_file_open(inode, file); }
--
2.31.1