From ff95ec22cd7faa0d8b58dcc4207f21502df7b00b Mon Sep 17 00:00:00 2001 From: Dmitry Monakhov Date: Mon, 4 Mar 2013 00:41:05 -0500 Subject: [PATCH] ext4: add warning to ext4_convert_unwritten_extents_endio Splitting extents inside endio is a bad thing, but unfortunately it is still possible. In fact we are pretty close to the moment when all related issues will be fixed. Let's warn developer if it still the case. Signed-off-by: Dmitry Monakhov Signed-off-by: "Theodore Ts'o" Reviewed-by: Jan Kara --- fs/ext4/extents.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index 60818ed1f6a9..265cb0e50c51 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -3387,8 +3387,19 @@ static int ext4_convert_unwritten_extents_endio(handle_t *handle, "block %llu, max_blocks %u\n", inode->i_ino, (unsigned long long)ee_block, ee_len); - /* If extent is larger than requested then split is required */ + /* If extent is larger than requested it is a clear sign that we still + * have some extent state machine issues left. So extent_split is still + * required. + * TODO: Once all related issues will be fixed this situation should be + * illegal. + */ if (ee_block != map->m_lblk || ee_len > map->m_len) { +#ifdef EXT4_DEBUG + ext4_warning("Inode (%ld) finished: extent logical block %llu," + " len %u; IO logical block %llu, len %u\n", + inode->i_ino, (unsigned long long)ee_block, ee_len, + (unsigned long long)map->m_lblk, map->m_len); +#endif err = ext4_split_unwritten_extents(handle, inode, map, path, EXT4_GET_BLOCKS_CONVERT); if (err < 0)