diff options
Diffstat (limited to 'fs/xfs/xfs_mount.c')
| -rw-r--r-- | fs/xfs/xfs_mount.c | 24 |
1 files changed, 19 insertions, 5 deletions
diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c index 0b690bc119d7..dc32c5e34d81 100644 --- a/fs/xfs/xfs_mount.c +++ b/fs/xfs/xfs_mount.c @@ -673,11 +673,6 @@ static inline xfs_extlen_t xfs_calc_atomic_write_max(struct xfs_mount *mp) return rounddown_pow_of_two(XFS_B_TO_FSB(mp, MAX_RW_COUNT)); } -static inline unsigned int max_pow_of_two_factor(const unsigned int nr) -{ - return 1 << (ffs(nr) - 1); -} - /* * If the underlying device advertises atomic write support, limit the size of * atomic writes to the greatest power-of-two factor of the group size so @@ -784,6 +779,25 @@ xfs_set_max_atomic_write_opt( return -EINVAL; } + if (xfs_has_reflink(mp)) + goto set_limit; + + if (new_max_fsbs == 1) { + if (mp->m_ddev_targp->bt_awu_max || + (mp->m_rtdev_targp && mp->m_rtdev_targp->bt_awu_max)) { + } else { + xfs_warn(mp, + "cannot support atomic writes of size %lluk with no reflink or HW support", + new_max_bytes >> 10); + return -EINVAL; + } + } else { + xfs_warn(mp, + "cannot support atomic writes of size %lluk with no reflink support", + new_max_bytes >> 10); + return -EINVAL; + } + set_limit: error = xfs_calc_atomic_write_reservation(mp, new_max_fsbs); if (error) { |