kevin/linux
1
Fork 0
Code

xfs: error out when a superblock buffer update reduces the agcount

Browse Source 
XFS currently does not support reducing the agcount, so error out if
a logged sb buffer tries to shrink the agcount.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Carlos Maiolino <cem@kernel.org>
This commit is contained in:
Christoph Hellwig 2024-10-14 08:04:53 +02:00 committed by Carlos Maiolino
parent 6a18765b54
commit b882b0f813
1 changed files with 5 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
fs/xfs/xfs_buf_item_recover.c
View File

@ -713,6 +713,11 @@ xlog_recover_do_primary_sb_buffer(
*/
xfs_sb_from_disk(&mp->m_sb, dsb);
if (mp->m_sb.sb_agcount < orig_agcount) {
xfs_alert(mp, "Shrinking AG count in log recovery not supported");
return -EFSCORRUPTED;
}
/*
* Initialize the new perags, and also update various block and inode
* allocator setting based off the number of AGs or total blocks.