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xfs: update the pag for the last AG at recovery time

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Currently log recovery never updates the in-core perag values for the
last allocation group when they were grown by growfs.  This leads to
btree record validation failures for the alloc, ialloc or finotbt
trees if a transaction references this new space.

Found by Brian's new growfs recovery stress test.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Carlos Maiolino <cem@kernel.org>
This commit is contained in:
Christoph Hellwig 2024-10-14 08:04:55 +02:00 committed by Carlos Maiolino
parent 069cf5e32b
commit 4a201dcfa1
3 changed files with 34 additions and 3 deletions
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17
fs/xfs/libxfs/xfs_ag.c
View File

@ -273,6 +273,23 @@ xfs_agino_range(
return __xfs_agino_range(mp, xfs_ag_block_count(mp, agno), first, last);
}
int
xfs_update_last_ag_size(
struct xfs_mount *mp,
xfs_agnumber_t prev_agcount)
{
struct xfs_perag *pag = xfs_perag_grab(mp, prev_agcount - 1);
if (!pag)
return -EFSCORRUPTED;
pag->block_count = __xfs_ag_block_count(mp, prev_agcount - 1,
mp->m_sb.sb_agcount, mp->m_sb.sb_dblocks);
__xfs_agino_range(mp, pag->block_count, &pag->agino_min,
&pag->agino_max);
xfs_perag_rele(pag);
return 0;
}
int
xfs_initialize_perag(
struct xfs_mount *mp,

1
fs/xfs/libxfs/xfs_ag.h
View File

@ -150,6 +150,7 @@ int xfs_initialize_perag(struct xfs_mount *mp, xfs_agnumber_t old_agcount,
void xfs_free_perag_range(struct xfs_mount *mp, xfs_agnumber_t first_agno,
xfs_agnumber_t end_agno);
int xfs_initialize_perag_data(struct xfs_mount *mp, xfs_agnumber_t agno);
int xfs_update_last_ag_size(struct xfs_mount *mp, xfs_agnumber_t prev_agcount);
/* Passive AG references */
struct xfs_perag *xfs_perag_get(struct xfs_mount *mp, xfs_agnumber_t agno);

19
fs/xfs/xfs_buf_item_recover.c
View File

@ -708,6 +708,11 @@ xlog_recover_do_primary_sb_buffer(
xlog_recover_do_reg_buffer(mp, item, bp, buf_f, current_lsn);
if (orig_agcount == 0) {
xfs_alert(mp, "Trying to grow file system without AGs");
return -EFSCORRUPTED;
}
/*
* Update the in-core super block from the freshly recovered on-disk one.
*/
@ -718,15 +723,23 @@ xlog_recover_do_primary_sb_buffer(
return -EFSCORRUPTED;
}
/*
* Growfs can also grow the last existing AG. In this case we also need
* to update the length in the in-core perag structure and values
* depending on it.
*/
error = xfs_update_last_ag_size(mp, orig_agcount);
if (error)
return error;
/*
* Initialize the new perags, and also update various block and inode
* allocator setting based off the number of AGs or total blocks.
* Because of the latter this also needs to happen if the agcount did
* not change.
*/
error = xfs_initialize_perag(mp, orig_agcount,
mp->m_sb.sb_agcount, mp->m_sb.sb_dblocks,
&mp->m_maxagi);
error = xfs_initialize_perag(mp, orig_agcount, mp->m_sb.sb_agcount,
mp->m_sb.sb_dblocks, &mp->m_maxagi);
if (error) {
xfs_warn(mp, "Failed recovery per-ag init: %d", error);
return error;