ocfs2: Implement show_options()

Implement sops->show_options() so as to allow /proc/mounts to show the mount
options.

Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>

1 files changed, 38 insertions, 0 deletions

diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index 19436d1ff57f..e5ac0714dab2 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -39,6 +39,7 @@
 #include <linux/parser.h>
 #include <linux/crc32.h>
 #include <linux/debugfs.h>
+#include <linux/mount.h>
 
 #include <cluster/nodemanager.h>
 
@@ -91,6 +92,7 @@ struct mount_options
 static int ocfs2_parse_options(struct super_block *sb, char *options,
                                struct mount_options *mopt,
                                int is_remount);
+static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt);
 static void ocfs2_put_super(struct super_block *sb);
 static int ocfs2_mount_volume(struct super_block *sb);
 static int ocfs2_remount(struct super_block *sb, int *flags, char *data);
@@ -133,6 +135,7 @@ static const struct super_operations ocfs2_sops = {
         .write_super    = ocfs2_write_super,
         .put_super      = ocfs2_put_super,
         .remount_fs     = ocfs2_remount,
+        .show_options   = ocfs2_show_options,
 };
 
 enum {
@@ -830,6 +833,41 @@ bail:
         return status;
 }
 
+static int ocfs2_show_options(struct seq_file *s, struct vfsmount *mnt)
+{
+        struct ocfs2_super *osb = OCFS2_SB(mnt->mnt_sb);
+        unsigned long opts = osb->s_mount_opt;
+
+        if (opts & OCFS2_MOUNT_HB_LOCAL)
+                seq_printf(s, ",_netdev,heartbeat=local");
+        else
+                seq_printf(s, ",heartbeat=none");
+
+        if (opts & OCFS2_MOUNT_NOINTR)
+                seq_printf(s, ",nointr");
+
+        if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
+                seq_printf(s, ",data=writeback");
+        else
+                seq_printf(s, ",data=ordered");
+
+        if (opts & OCFS2_MOUNT_BARRIER)
+                seq_printf(s, ",barrier=1");
+
+        if (opts & OCFS2_MOUNT_ERRORS_PANIC)
+                seq_printf(s, ",errors=panic");
+        else
+                seq_printf(s, ",errors=remount-ro");
+
+        if (osb->preferred_slot != OCFS2_INVALID_SLOT)
+                seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
+
+        if (osb->s_atime_quantum != OCFS2_DEFAULT_ATIME_QUANTUM)
+                seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
+
+        return 0;
+}
+
 static int __init ocfs2_init(void)
 {
         int status;