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xfs: update lazy sb counters immediately for resizefs 

sb_fdblocks will be updated lazily if lazysbcount is enabled,
therefore when shrinking the filesystem sb_fdblocks could be
larger than sb_dblocks and xfs_validate_sb_write() would fail.

Even for growfs case, it'd be better to update lazy sb counters
immediately to reflect the real sb counters.

Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Gao Xiang <hsiangkao@redhat.com>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
This commit is contained in:
Gao Xiang 2021-03-23 19:05:37 -07:00 committed by Darrick J. Wong
parent f9dd7ba430
commit 014695c0a7
1 changed files with 9 additions and 0 deletions
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9
fs/xfs/xfs_fsops.c
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@ -128,6 +128,15 @@ xfs_growfs_data_private(
nb - mp->m_sb.sb_dblocks);
if (id.nfree)
xfs_trans_mod_sb(tp, XFS_TRANS_SB_FDBLOCKS, id.nfree);
/*
* Sync sb counters now to reflect the updated values. This is
* particularly important for shrink because the write verifier
* will fail if sb_fdblocks is ever larger than sb_dblocks.
*/
if (xfs_sb_version_haslazysbcount(&mp->m_sb))
xfs_log_sb(tp);
xfs_trans_set_sync(tp);
error = xfs_trans_commit(tp);
if (error)