gfs2: move check_journal_clean to util.c for future use

Before this patch function check_journal_clean was in ops_fstype.c.
This patch moves it to util.c so we can make use of it elsewhere
in a future patch.
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Reviewed-by: Andreas Gruenbacher <agruenba@redhat.com>

fs/gfs2/ops_fstype.c

@@ -600,48 +600,6 @@ static int gfs2_jindex_hold(struct gfs2_sbd *sdp, struct gfs2_holder *ji_gh)
 	return error;
 }
 
-/**
- * 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;
-}
-
 static int init_journal(struct gfs2_sbd *sdp, int undo)
 {
 	struct inode *master = d_inode(sdp->sd_master_dir);

fs/gfs2/util.c

@@ -16,7 +16,10 @@
 #include "gfs2.h"
 #include "incore.h"
 #include "glock.h"
+#include "lops.h"
+#include "recovery.h"
 #include "rgrp.h"
+#include "super.h"
 #include "util.h"
 
 struct kmem_cache *gfs2_glock_cachep __read_mostly;
@@ -33,6 +36,48 @@ void gfs2_assert_i(struct gfs2_sbd *sdp)
 	fs_emerg(sdp, "fatal assertion failed\n");
 }
 
+/**
+ * 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
+ */
+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;
+}
+
 void gfs2_lm(struct gfs2_sbd *sdp, const char *fmt, ...)
 {
 	struct va_format vaf;

fs/gfs2/util.h

@@ -136,6 +136,7 @@ static inline void gfs2_metatype_set(struct buffer_head *bh, u16 type,
 
 int gfs2_io_error_i(struct gfs2_sbd *sdp, const char *function,
 		    char *file, unsigned int line);
+int check_journal_clean(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd);
 
 #define gfs2_io_error(sdp) \
 gfs2_io_error_i((sdp), __func__, __FILE__, __LINE__);