[PATCH 08/12] xfs: implement the F_IOINFO fcntl

[Christoph Hellwig]

Signed-off-by: Christoph Hellwig <h...@lst.de>
---
 fs/xfs/xfs_file.c | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index a7d8324b59c5..4d955b3266df 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -898,6 +898,39 @@ xfs_file_dedupe_range(
        return len;
 }
 
+static uint16_t
+xfs_dio_alignment(struct file *file)
+{
+       struct xfs_inode        *ip = XFS_I(file_inode(file));
+       struct xfs_mount        *mp = ip->i_mount;
+
+       if (file->f_flags & O_ATOMIC)
+               return mp->m_sb.sb_blocksize;
+       else if (XFS_IS_REALTIME_INODE(ip))
+               return mp->m_rtdev_targp->bt_logical_sectorsize;
+       else
+               return mp->m_ddev_targp->bt_logical_sectorsize;
+}
+
+static int
+xfs_file_ioinfo(
+       struct file             *file,
+       struct fcntl_ioinfo     *fio)
+{
+       if (file->f_flags & O_DIRECT)
+               fio->fio_alignment = xfs_dio_alignment(file);
+
+       if (file->f_flags & O_ATOMIC) {
+               fio->fio_flags = FIO_FL_ATOMIC_OSYNC | FIO_FL_ATOMIC_FSYNC;
+               fio->fio_max_atomic = INT_MAX;
+               if (fio->fio_alignment)
+                       fio->fio_max_atomic &= ~(fio->fio_alignment - 1);
+       }
+
+
+       return 0;
+};
+
 STATIC int
 xfs_file_open(
        struct inode    *inode,
@@ -1556,6 +1589,7 @@ const struct file_operations xfs_file_operations = {
        .fallocate      = xfs_file_fallocate,
        .clone_file_range = xfs_file_clone_range,
        .dedupe_file_range = xfs_file_dedupe_range,
+       .ioinfo         = xfs_file_ioinfo,
 };
 
 const struct file_operations xfs_dir_file_operations = {
-- 
2.11.0