cifs: display iocharset= option in /proc/mounts

...but only if it's not the default charset.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>

1 files changed, 15 insertions, 0 deletions

diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 85ea98d139fc..d70e551f0bfb 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -357,6 +357,18 @@ cifs_show_cache_flavor(struct seq_file *s, struct cifs_sb_info *cifs_sb)
                 seq_printf(s, "loose");
 }
 
+static void
+cifs_show_nls(struct seq_file *s, struct nls_table *cur)
+{
+        struct nls_table *def;
+
+        /* Display iocharset= option if it's not default charset */
+        def = load_nls_default();
+        if (def != cur)
+                seq_printf(s, ",iocharset=%s", cur->charset);
+        unload_nls(def);
+}
+
 /*
  * cifs_show_options() is for displaying mount options in /proc/mounts.
  * Not all settable options are displayed but most of the important
@@ -418,6 +430,9 @@ cifs_show_options(struct seq_file *s, struct dentry *root)
                 seq_printf(s, ",file_mode=0%ho,dir_mode=0%ho",
                                            cifs_sb->mnt_file_mode,
                                            cifs_sb->mnt_dir_mode);
+
+        cifs_show_nls(s, cifs_sb->local_nls);
+
         if (tcon->seal)
                 seq_printf(s, ",seal");
         if (tcon->nocase)