ext4: fix fdatasync(2) after extent manipulation operations

commit 67a7d5f561f469ad2fa5154d2888258ab8e6df7c upstream.

Currently, extent manipulation operations such as hole punch, range
zeroing, or extent shifting do not record the fact that file data has
changed and thus fdatasync(2) has a work to do. As a result if we crash
e.g. after a punch hole and fdatasync, user can still possibly see the
punched out data after journal replay. Test generic/392 fails due to
these problems.

Fix the problem by properly marking that file data has changed in these
operations.

Fixes: a4bb6b64e39abc0e41ca077725f2a72c868e7622
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 8a456f9..61d5bfc 100644 (file)
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -4902,6 +4902,8 @@ static long ext4_zero_range(struct file *file, loff_t offset,
 
        /* Zero out partial block at the edges of the range */
        ret = ext4_zero_partial_blocks(handle, inode, offset, len);
+       if (ret >= 0)
+               ext4_update_inode_fsync_trans(handle, inode, 1);
 
        if (file->f_flags & O_SYNC)
                ext4_handle_sync(handle);
@@ -5597,6 +5599,7 @@ int ext4_collapse_range(struct inode *inode, loff_t offset, loff_t len)
                ext4_handle_sync(handle);
        inode->i_mtime = inode->i_ctime = ext4_current_time(inode);
        ext4_mark_inode_dirty(handle, inode);
+       ext4_update_inode_fsync_trans(handle, inode, 1);
 
 out_stop:
        ext4_journal_stop(handle);
@@ -5770,6 +5773,8 @@ int ext4_insert_range(struct inode *inode, loff_t offset, loff_t len)
        up_write(&EXT4_I(inode)->i_data_sem);
        if (IS_SYNC(inode))
                ext4_handle_sync(handle);
+       if (ret >= 0)
+               ext4_update_inode_fsync_trans(handle, inode, 1);
 
 out_stop:
        ext4_journal_stop(handle);

diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 27e34fb..801c32e 100644 (file)
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -3793,6 +3793,8 @@ int ext4_punch_hole(struct inode *inode, loff_t offset, loff_t length)
 
        inode->i_mtime = inode->i_ctime = ext4_current_time(inode);
        ext4_mark_inode_dirty(handle, inode);
+       if (ret >= 0)
+               ext4_update_inode_fsync_trans(handle, inode, 1);
 out_stop:
        ext4_journal_stop(handle);
 out_dio: