diff options
Diffstat (limited to 'fs/ext4/inode.c')
| -rw-r--r-- | fs/ext4/inode.c | 31 |
1 files changed, 20 insertions, 11 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 17bfa42ac971..779ef4c11bc1 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -5452,22 +5452,29 @@ int ext4_change_inode_journal_flag(struct inode *inode, int val) return 0; if (is_journal_aborted(journal)) return -EROFS; - /* We have to allocate physical blocks for delalloc blocks - * before flushing journal. otherwise delalloc blocks can not - * be allocated any more. even more truncate on delalloc blocks - * could trigger BUG by flushing delalloc blocks in journal. - * There is no delalloc block in non-journal data mode. - */ - if (val && test_opt(inode->i_sb, DELALLOC)) { - err = ext4_alloc_da_blocks(inode); - if (err < 0) - return err; - } /* Wait for all existing dio workers */ ext4_inode_block_unlocked_dio(inode); inode_dio_wait(inode); + /* + * Before flushing the journal and switching inode's aops, we have + * to flush all dirty data the inode has. There can be outstanding + * delayed allocations, there can be unwritten extents created by + * fallocate or buffered writes in dioread_nolock mode covered by + * dirty data which can be converted only after flushing the dirty + * data (and journalled aops don't know how to handle these cases). + */ + if (val) { + down_write(&EXT4_I(inode)->i_mmap_sem); + err = filemap_write_and_wait(inode->i_mapping); + if (err < 0) { + up_write(&EXT4_I(inode)->i_mmap_sem); + ext4_inode_resume_unlocked_dio(inode); + return err; + } + } + jbd2_journal_lock_updates(journal); /* @@ -5492,6 +5499,8 @@ int ext4_change_inode_journal_flag(struct inode *inode, int val) ext4_set_aops(inode); jbd2_journal_unlock_updates(journal); + if (val) + up_write(&EXT4_I(inode)->i_mmap_sem); ext4_inode_resume_unlocked_dio(inode); /* Finally we can mark the inode as dirty. */ |