Because we have lazy counters, it's possible that we over-allocate inodes past the maxicount (imaxpct) limit. A previous commit, 2fe3366 xfs: ensure f_ffree returned by statfs() is non-negative stopped statfs from underflowing f_ffree in this case, but that only happened when we mis-reported f_files, capped at maxicount. Change statfs to report the actual number of inodes allocated, even if it is greater than maxicount. It's reality. Deal with it. Also rework code & rename vars for clarity after input from dchinner & bfoster. Signed-off-by: Eric Sandeen <sandeen@xxxxxxxxxx> --- V2: code cleanup thanks to Brian V3: more cleanup thanks to Dave diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c index f317488..2f80923 100644 --- a/fs/xfs/xfs_super.c +++ b/fs/xfs/xfs_super.c @@ -1081,9 +1081,8 @@ xfs_fs_statfs( struct xfs_mount *mp = XFS_M(dentry->d_sb); xfs_sb_t *sbp = &mp->m_sb; struct xfs_inode *ip = XFS_I(dentry->d_inode); - __uint64_t fakeinos, id; + __uint64_t potential, id; xfs_extlen_t lsize; - __int64_t ffree; statp->f_type = XFS_SB_MAGIC; statp->f_namelen = MAXNAMELEN - 1; @@ -1100,17 +1099,17 @@ xfs_fs_statfs( statp->f_blocks = sbp->sb_dblocks - lsize; statp->f_bfree = statp->f_bavail = sbp->sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp); - fakeinos = statp->f_bfree << sbp->sb_inopblog; - statp->f_files = - MIN(sbp->sb_icount + fakeinos, (__uint64_t)XFS_MAXINUMBER); - if (mp->m_maxicount) - statp->f_files = min_t(typeof(statp->f_files), - statp->f_files, - mp->m_maxicount); - - /* make sure statp->f_ffree does not underflow */ - ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree); - statp->f_ffree = max_t(__int64_t, ffree, 0); + + /* Potential new inodes in free blocks, limited by maxicount */ + potential = statp->f_bfree << sbp->sb_inopblog; + if (mp->m_maxicount > sbp->sb_icount) + potential = min(mp->m_maxicount - sbp->sb_icount, potential); + else + potential = 0; + + /* Total possible files is current inodes + potential new inodes */ + statp->f_files = min_t(u64, sbp->sb_icount + potential, XFS_MAXINUMBER); + statp->f_ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree); spin_unlock(&mp->m_sb_lock); _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
