ext4: note the error in ext4_end_bio()

commit 9503c67c93ed0b95ba62d12d1fd09da6245dbdd6 upstream.

ext4_end_bio() currently throws away the error that it receives.  Chances
are this is part of a spate of errors, one of which will end up getting
the error returned to userspace somehow, but we shouldn't take that risk.
Also print out the errno to aid in debug.

Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c
index ab95508e3d4018eab92647c6d2308e98524080d1..c18d95b5054081c75e0c7a2fab975976838f9b02 100644 (file)
--- a/fs/ext4/page-io.c
+++ b/fs/ext4/page-io.c
@@ -308,13 +308,14 @@ static void ext4_end_bio(struct bio *bio, int error)
        if (error) {
                struct inode *inode = io_end->inode;
 
-               ext4_warning(inode->i_sb, "I/O error writing to inode %lu "
+               ext4_warning(inode->i_sb, "I/O error %d writing to inode %lu "
                             "(offset %llu size %ld starting block %llu)",
-                            inode->i_ino,
+                            error, inode->i_ino,
                             (unsigned long long) io_end->offset,
                             (long) io_end->size,
                             (unsigned long long)
                             bi_sector >> (inode->i_blkbits - 9));
+               mapping_set_error(inode->i_mapping, error);
        }
 
        if (io_end->flag & EXT4_IO_END_UNWRITTEN) {