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nilfs2: ensure to clear dirty state when deleting metadata file block

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This would fix the following failure during GC:

 nilfs_cpfile_delete_checkpoints: cannot delete block
 NILFS: GC failed during preparation: cannot delete checkpoints: err=-2

The problem was caused by a break in state consistency between page
cache and btree; the above block was removed from the btree but the
page buffering the block was remaining in the page cache in dirty
state.

This resolves the inconsistency by ensuring to clear dirty state of
the page buffering the deleted block.

Reported-by: David Arendt <admin@prnet.org>
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
This commit is contained in:
Ryusuke Konishi 2009-05-05 21:52:06 +09:00
parent 201913ed74
commit 843382370e
2 changed files with 3 additions and 2 deletions
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2
fs/nilfs2/mdt.c
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@ -300,7 +300,7 @@ int nilfs_mdt_delete_block(struct inode *inode, unsigned long block)
int err;
err = nilfs_bmap_delete(ii->i_bmap, block);
if (likely(!err)) {
if (!err || err == -ENOENT) {
nilfs_mdt_mark_dirty(inode);
nilfs_mdt_forget_block(inode, block);
}

3
fs/nilfs2/page.c
View file

@ -128,7 +128,8 @@ void nilfs_forget_buffer(struct buffer_head *bh)
lock_buffer(bh);
clear_buffer_nilfs_volatile(bh);
if (test_clear_buffer_dirty(bh) && nilfs_page_buffers_clean(page))
clear_buffer_dirty(bh);
if (nilfs_page_buffers_clean(page))
__nilfs_clear_page_dirty(page);
clear_buffer_uptodate(bh);