+int ext4_journal_start(const char *mount_point)
+{
+ int r = EOK;
+ struct ext4_mountpoint *mp = ext4_get_mount(mount_point);
+ if (!mp)
+ return ENOENT;
+
+ if (ext4_sb_feature_com(&mp->fs.sb,
+ EXT4_FCOM_HAS_JOURNAL)) {
+ r = jbd_get_fs(&mp->fs, &mp->jbd_fs);
+ if (r != EOK)
+ goto Finish;
+
+ r = jbd_journal_start(&mp->jbd_fs, &mp->jbd_journal);
+ if (r != EOK) {
+ mp->jbd_fs.dirty = false;
+ jbd_put_fs(&mp->jbd_fs);
+ goto Finish;
+ }
+ mp->fs.jbd_fs = &mp->jbd_fs;
+ mp->fs.jbd_journal = &mp->jbd_journal;
+ }
+Finish:
+ return r;
+}
+
+int ext4_journal_stop(const char *mount_point)
+{
+ int r = EOK;
+ struct ext4_mountpoint *mp = ext4_get_mount(mount_point);
+ if (!mp)
+ return ENOENT;
+
+ if (ext4_sb_feature_com(&mp->fs.sb,
+ EXT4_FCOM_HAS_JOURNAL)) {
+ r = jbd_journal_stop(&mp->jbd_journal);
+ if (r != EOK) {
+ mp->jbd_fs.dirty = false;
+ jbd_put_fs(&mp->jbd_fs);
+ mp->fs.jbd_journal = NULL;
+ mp->fs.jbd_fs = NULL;
+ goto Finish;
+ }
+
+ r = jbd_put_fs(&mp->jbd_fs);
+ if (r != EOK) {
+ mp->fs.jbd_journal = NULL;
+ mp->fs.jbd_fs = NULL;
+ goto Finish;
+ }
+
+ mp->fs.jbd_journal = NULL;
+ mp->fs.jbd_fs = NULL;
+ }
+Finish:
+ return r;
+}
+