From: Darrick J. Wong <djwong@xxxxxxxxxx> On a modern filesystem, we don't allow userspace to allocate blocks for data storage from the per-AG space reservations, the user-controlled reservation pool that prevents ENOSPC in the middle of internal operations, or the internal per-AG set-aside that prevents unwanted filesystem shutdowns due to ENOSPC during a bmap btree split. Since we now consider freespace btree blocks as unavailable for allocation for data storage, we shouldn't report those blocks via statfs either. This makes the numbers that we return via the statfs f_bavail and f_bfree fields a more conservative estimate of actual free space. Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx> Reviewed-by: Brian Foster <bfoster@xxxxxxxxxx> Reviewed-by: Dave Chinner <dchinner@xxxxxxxxxx> --- fs/xfs/xfs_fsops.c | 2 +- fs/xfs/xfs_super.c | 3 ++- 2 files changed, 3 insertions(+), 2 deletions(-) diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c index 5b5b68affe66..196e2c51309c 100644 --- a/fs/xfs/xfs_fsops.c +++ b/fs/xfs/xfs_fsops.c @@ -347,7 +347,7 @@ xfs_fs_counts( cnt->allocino = percpu_counter_read_positive(&mp->m_icount); cnt->freeino = percpu_counter_read_positive(&mp->m_ifree); cnt->freedata = percpu_counter_read_positive(&mp->m_fdblocks) - - mp->m_alloc_set_aside; + xfs_fdblocks_unavailable(mp); spin_lock(&mp->m_sb_lock); cnt->freertx = mp->m_sb.sb_frextents; diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c index d84714e4e46a..54be9d64093e 100644 --- a/fs/xfs/xfs_super.c +++ b/fs/xfs/xfs_super.c @@ -815,7 +815,8 @@ xfs_fs_statfs( spin_unlock(&mp->m_sb_lock); /* make sure statp->f_bfree does not underflow */ - statp->f_bfree = max_t(int64_t, fdblocks - mp->m_alloc_set_aside, 0); + statp->f_bfree = max_t(int64_t, 0, + fdblocks - xfs_fdblocks_unavailable(mp)); statp->f_bavail = statp->f_bfree; fakeinos = XFS_FSB_TO_INO(mp, statp->f_bfree);
