fs: convert __generic_file_fsync to use errseq_t based reporting

Many simple, block-based filesystems use generic_file_fsync as their
fsync operation. Some others (ext* and fat) also call this function
to handle syncing out data.

Switch this code over to use errseq_t based error reporting so that
all of these filesystems get reliable error reporting via fsync,
fdatasync and msync.

Signed-off-by: Jeff Layton <jlayton@redhat.com>

1 files changed, 6 insertions, 4 deletions

diff --git a/fs/libfs.c b/fs/libfs.c
index 1b76f29799bf..3aabe553fc45 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -974,7 +974,7 @@ int __generic_file_fsync(struct file *file, loff_t start, loff_t end,
         int err;
         int ret;
 
-        err = filemap_write_and_wait_range(inode->i_mapping, start, end);
+        err = file_write_and_wait_range(file, start, end);
         if (err)
                 return err;
 
@@ -991,9 +991,11 @@ int __generic_file_fsync(struct file *file, loff_t start, loff_t end,
 
 out:
         inode_unlock(inode);
-        /* must call this unconditionally as it clears AS_* error flags */
-        err = filemap_check_errors(inode->i_mapping);
-        return ret ? ret : err;
+        /* check and advance again to catch errors after syncing out buffers */
+        err = file_check_and_advance_wb_err(file);
+        if (ret == 0)
+                ret = err;
+        return ret;
 }
 EXPORT_SYMBOL(__generic_file_fsync);