From: Christoph Hellwig hch@lst.de
commit 82742f8c3f1a93787a05a00aca50c2a565231f84 upstream.
[backport: dependency of 6a18765b]
Currently only the new agcount is passed to xfs_initialize_perag, which requires lookups of existing AGs to skip them and complicates error handling. Also pass the previous agcount so that the range that xfs_initialize_perag operates on is exactly defined. That way the extra lookups can be avoided, and error handling can clean up the exact range from the old count to the last added perag structure.
Signed-off-by: Christoph Hellwig hch@lst.de Reviewed-by: Darrick J. Wong djwong@kernel.org Reviewed-by: Brian Foster bfoster@redhat.com Signed-off-by: Carlos Maiolino cem@kernel.org Signed-off-by: Catherine Hoang catherine.hoang@oracle.com Acked-by: Darrick J. Wong djwong@kernel.org --- fs/xfs/libxfs/xfs_ag.c | 28 ++++++---------------------- fs/xfs/libxfs/xfs_ag.h | 5 +++-- fs/xfs/xfs_fsops.c | 18 ++++++++---------- fs/xfs/xfs_log_recover.c | 5 +++-- fs/xfs/xfs_mount.c | 4 ++-- 5 files changed, 22 insertions(+), 38 deletions(-)
diff --git a/fs/xfs/libxfs/xfs_ag.c b/fs/xfs/libxfs/xfs_ag.c index 1531bd0ee359..b75928dc1866 100644 --- a/fs/xfs/libxfs/xfs_ag.c +++ b/fs/xfs/libxfs/xfs_ag.c @@ -360,27 +360,16 @@ xfs_free_unused_perag_range( int xfs_initialize_perag( struct xfs_mount *mp, - xfs_agnumber_t agcount, + xfs_agnumber_t old_agcount, + xfs_agnumber_t new_agcount, xfs_rfsblock_t dblocks, xfs_agnumber_t *maxagi) { struct xfs_perag *pag; xfs_agnumber_t index; - xfs_agnumber_t first_initialised = NULLAGNUMBER; int error;
- /* - * Walk the current per-ag tree so we don't try to initialise AGs - * that already exist (growfs case). Allocate and insert all the - * AGs we don't find ready for initialisation. - */ - for (index = 0; index < agcount; index++) { - pag = xfs_perag_get(mp, index); - if (pag) { - xfs_perag_put(pag); - continue; - } - + for (index = old_agcount; index < new_agcount; index++) { pag = kmem_zalloc(sizeof(*pag), KM_MAYFAIL); if (!pag) { error = -ENOMEM; @@ -425,21 +414,17 @@ xfs_initialize_perag( /* Active ref owned by mount indicates AG is online. */ atomic_set(&pag->pag_active_ref, 1);
- /* first new pag is fully initialized */ - if (first_initialised == NULLAGNUMBER) - first_initialised = index; - /* * Pre-calculated geometry */ - pag->block_count = __xfs_ag_block_count(mp, index, agcount, + pag->block_count = __xfs_ag_block_count(mp, index, new_agcount, dblocks); pag->min_block = XFS_AGFL_BLOCK(mp); __xfs_agino_range(mp, pag->block_count, &pag->agino_min, &pag->agino_max); }
- index = xfs_set_inode_alloc(mp, agcount); + index = xfs_set_inode_alloc(mp, new_agcount);
if (maxagi) *maxagi = index; @@ -455,8 +440,7 @@ xfs_initialize_perag( out_free_pag: kmem_free(pag); out_unwind_new_pags: - /* unwind any prior newly initialized pags */ - xfs_free_unused_perag_range(mp, first_initialised, agcount); + xfs_free_unused_perag_range(mp, old_agcount, index); return error; }
diff --git a/fs/xfs/libxfs/xfs_ag.h b/fs/xfs/libxfs/xfs_ag.h index 40d7b6427afb..ebebb1242c2a 100644 --- a/fs/xfs/libxfs/xfs_ag.h +++ b/fs/xfs/libxfs/xfs_ag.h @@ -135,8 +135,9 @@ __XFS_AG_OPSTATE(agfl_needs_reset, AGFL_NEEDS_RESET)
void xfs_free_unused_perag_range(struct xfs_mount *mp, xfs_agnumber_t agstart, xfs_agnumber_t agend); -int xfs_initialize_perag(struct xfs_mount *mp, xfs_agnumber_t agcount, - xfs_rfsblock_t dcount, xfs_agnumber_t *maxagi); +int xfs_initialize_perag(struct xfs_mount *mp, xfs_agnumber_t old_agcount, + xfs_agnumber_t agcount, xfs_rfsblock_t dcount, + xfs_agnumber_t *maxagi); int xfs_initialize_perag_data(struct xfs_mount *mp, xfs_agnumber_t agno); void xfs_free_perag(struct xfs_mount *mp);
diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c index c3f0e3cae87e..a2c1eab5fa4a 100644 --- a/fs/xfs/xfs_fsops.c +++ b/fs/xfs/xfs_fsops.c @@ -87,6 +87,7 @@ xfs_growfs_data_private( struct xfs_mount *mp, /* mount point for filesystem */ struct xfs_growfs_data *in) /* growfs data input struct */ { + xfs_agnumber_t oagcount = mp->m_sb.sb_agcount; struct xfs_buf *bp; int error; xfs_agnumber_t nagcount; @@ -94,7 +95,6 @@ xfs_growfs_data_private( xfs_rfsblock_t nb, nb_div, nb_mod; int64_t delta; bool lastag_extended = false; - xfs_agnumber_t oagcount; struct xfs_trans *tp; struct aghdr_init_data id = {}; struct xfs_perag *last_pag; @@ -138,16 +138,14 @@ xfs_growfs_data_private( if (delta == 0) return 0;
- oagcount = mp->m_sb.sb_agcount; - /* allocate the new per-ag structures */ - if (nagcount > oagcount) { - error = xfs_initialize_perag(mp, nagcount, nb, &nagimax); - if (error) - return error; - } else if (nagcount < oagcount) { - /* TODO: shrinking the entire AGs hasn't yet completed */ + /* TODO: shrinking the entire AGs hasn't yet completed */ + if (nagcount < oagcount) return -EINVAL; - } + + /* allocate the new per-ag structures */ + error = xfs_initialize_perag(mp, oagcount, nagcount, nb, &nagimax); + if (error) + return error;
if (delta > 0) error = xfs_trans_alloc(mp, &M_RES(mp)->tr_growdata, diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c index 9ef5d0b1cfdb..79fdd4c91c44 100644 --- a/fs/xfs/xfs_log_recover.c +++ b/fs/xfs/xfs_log_recover.c @@ -3317,6 +3317,7 @@ xlog_do_recover( struct xfs_mount *mp = log->l_mp; struct xfs_buf *bp = mp->m_sb_bp; struct xfs_sb *sbp = &mp->m_sb; + xfs_agnumber_t orig_agcount = sbp->sb_agcount; int error;
trace_xfs_log_recover(log, head_blk, tail_blk); @@ -3365,8 +3366,8 @@ xlog_do_recover( /* re-initialise in-core superblock and geometry structures */ mp->m_features |= xfs_sb_version_to_features(sbp); xfs_reinit_percpu_counters(mp); - error = xfs_initialize_perag(mp, sbp->sb_agcount, sbp->sb_dblocks, - &mp->m_maxagi); + error = xfs_initialize_perag(mp, orig_agcount, sbp->sb_agcount, + sbp->sb_dblocks, &mp->m_maxagi); if (error) { xfs_warn(mp, "Failed post-recovery per-ag init: %d", error); return error; diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c index 0a0fd19573d8..747db90731e8 100644 --- a/fs/xfs/xfs_mount.c +++ b/fs/xfs/xfs_mount.c @@ -797,8 +797,8 @@ xfs_mountfs( /* * Allocate and initialize the per-ag data. */ - error = xfs_initialize_perag(mp, sbp->sb_agcount, mp->m_sb.sb_dblocks, - &mp->m_maxagi); + error = xfs_initialize_perag(mp, 0, sbp->sb_agcount, + mp->m_sb.sb_dblocks, &mp->m_maxagi); if (error) { xfs_warn(mp, "Failed per-ag init: %d", error); goto out_free_dir;