-/**
- * check_journal_clean - Make sure a journal is clean for a spectator mount
- * @sdp: The GFS2 superblock
- * @jd: The journal descriptor
- *
- * Returns: 0 if the journal is clean or locked, else an error
- */
-static int check_journal_clean(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd)
-{
- int error;
- struct gfs2_holder j_gh;
- struct gfs2_log_header_host head;
- struct gfs2_inode *ip;
-
- ip = GFS2_I(jd->jd_inode);
- error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_NOEXP |
- GL_EXACT | GL_NOCACHE, &j_gh);
- if (error) {
- fs_err(sdp, "Error locking journal for spectator mount.\n");
- return -EPERM;
- }
- error = gfs2_jdesc_check(jd);
- if (error) {
- fs_err(sdp, "Error checking journal for spectator mount.\n");
- goto out_unlock;
- }
- error = gfs2_find_jhead(jd, &head, false);
- if (error) {
- fs_err(sdp, "Error parsing journal for spectator mount.\n");
- goto out_unlock;
- }
- if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) {
- error = -EPERM;
- fs_err(sdp, "jid=%u: Journal is dirty, so the first mounter "
- "must not be a spectator.\n", jd->jd_jid);
- }
-
-out_unlock:
- gfs2_glock_dq_uninit(&j_gh);
- return error;
-}
-