From 4cb6e89a3d901d4da515977e55f9a9a779238660 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Tue, 9 Jun 2026 09:52:44 +0200 Subject: [PATCH] xfs: pass back updated nb from xfs_growfs_compute_deltas xfs_growfs_compute_deltas can update nb for corner cases like a number of blocks that would create a less the minimal sized AG, or running past the max AG limit. Pass back the calculated value to the caller, as it relies on to calculate the new number of perag structures. Note that the grown file system size is not affected by this miscalculation as it uses the passed back delta value. Fixes: a49b7ff63f98 ("xfs: Refactoring the nagcount and delta calculation") Cc: stable@vger.kernel.org # v7.0 Signed-off-by: Christoph Hellwig Reviewed-by: "Darrick J. Wong" Reviewed-by: Carlos Maiolino Signed-off-by: Carlos Maiolino --- fs/xfs/libxfs/xfs_ag.c | 10 +++++----- fs/xfs/libxfs/xfs_ag.h | 2 +- fs/xfs/xfs_fsops.c | 2 +- 3 files changed, 7 insertions(+), 7 deletions(-) diff --git a/fs/xfs/libxfs/xfs_ag.c b/fs/xfs/libxfs/xfs_ag.c index dcd2f93b6a6c..0c5f0548021f 100644 --- a/fs/xfs/libxfs/xfs_ag.c +++ b/fs/xfs/libxfs/xfs_ag.c @@ -866,7 +866,7 @@ xfs_ag_shrink_space( void xfs_growfs_compute_deltas( struct xfs_mount *mp, - xfs_rfsblock_t nb, + xfs_rfsblock_t *nb, int64_t *deltap, xfs_agnumber_t *nagcountp) { @@ -874,19 +874,19 @@ xfs_growfs_compute_deltas( int64_t delta; xfs_agnumber_t nagcount; - nb_div = nb; + nb_div = *nb; nb_mod = do_div(nb_div, mp->m_sb.sb_agblocks); if (nb_mod && nb_mod >= XFS_MIN_AG_BLOCKS) nb_div++; else if (nb_mod) - nb = nb_div * mp->m_sb.sb_agblocks; + *nb = nb_div * mp->m_sb.sb_agblocks; if (nb_div > XFS_MAX_AGNUMBER + 1) { nb_div = XFS_MAX_AGNUMBER + 1; - nb = nb_div * mp->m_sb.sb_agblocks; + *nb = nb_div * mp->m_sb.sb_agblocks; } nagcount = nb_div; - delta = nb - mp->m_sb.sb_dblocks; + delta = *nb - mp->m_sb.sb_dblocks; *deltap = delta; *nagcountp = nagcount; } diff --git a/fs/xfs/libxfs/xfs_ag.h b/fs/xfs/libxfs/xfs_ag.h index 16a9b43a3c27..8aa4266c5571 100644 --- a/fs/xfs/libxfs/xfs_ag.h +++ b/fs/xfs/libxfs/xfs_ag.h @@ -330,7 +330,7 @@ int xfs_ag_init_headers(struct xfs_mount *mp, struct aghdr_init_data *id); int xfs_ag_shrink_space(struct xfs_perag *pag, struct xfs_trans **tpp, xfs_extlen_t delta); void -xfs_growfs_compute_deltas(struct xfs_mount *mp, xfs_rfsblock_t nb, +xfs_growfs_compute_deltas(struct xfs_mount *mp, xfs_rfsblock_t *nb, int64_t *deltap, xfs_agnumber_t *nagcountp); int xfs_ag_extend_space(struct xfs_perag *pag, struct xfs_trans *tp, xfs_extlen_t len); diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c index 8d64d904d73c..436857356a0a 100644 --- a/fs/xfs/xfs_fsops.c +++ b/fs/xfs/xfs_fsops.c @@ -124,7 +124,7 @@ xfs_growfs_data_private( mp->m_sb.sb_rextsize); if (error) return error; - xfs_growfs_compute_deltas(mp, nb, &delta, &nagcount); + xfs_growfs_compute_deltas(mp, &nb, &delta, &nagcount); /* * Reject filesystems with a single AG because they are not