mount options: fix hpfs

Add a .show_options super operation to hpfs.

Use generic_show_options() and save the complete option string in
hpfs_fill_super() and hpfs_remount_fs().

Also add a small fix: hpfs_remount_fs() should return -EINVAL on
error, instead of 1, which is not an error value.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Cc: Mikulas Patocka <mikulas@artax.karlin.mff.cuni.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 14 insertions, 3 deletions

diff --git a/fs/hpfs/super.c b/fs/hpfs/super.c
index 00971d999964..f63a699ec659 100644
--- a/fs/hpfs/super.c
+++ b/fs/hpfs/super.c
@@ -386,6 +386,7 @@ static int hpfs_remount_fs(struct super_block *s, int *flags, char *data)
         int lowercase, conv, eas, chk, errs, chkdsk, timeshift;
         int o;
         struct hpfs_sb_info *sbi = hpfs_sb(s);
+        char *new_opts = kstrdup(data, GFP_KERNEL);
         
         *flags |= MS_NOATIME;
         
@@ -398,15 +399,15 @@ static int hpfs_remount_fs(struct super_block *s, int *flags, char *data)
         if (!(o = parse_opts(data, &uid, &gid, &umask, &lowercase, &conv,
             &eas, &chk, &errs, &chkdsk, &timeshift))) {
                 printk("HPFS: bad mount options.\n");
-                return 1;
+                goto out_err;
         }
         if (o == 2) {
                 hpfs_help();
-                return 1;
+                goto out_err;
         }
         if (timeshift != sbi->sb_timeshift) {
                 printk("HPFS: timeshift can't be changed using remount.\n");
-                return 1;
+                goto out_err;
         }
 
         unmark_dirty(s);
@@ -419,7 +420,14 @@ static int hpfs_remount_fs(struct super_block *s, int *flags, char *data)
 
         if (!(*flags & MS_RDONLY)) mark_dirty(s);
 
+        kfree(s->s_options);
+        s->s_options = new_opts;
+
         return 0;
+
+out_err:
+        kfree(new_opts);
+        return -EINVAL;
 }
 
 /* Super operations */
@@ -432,6 +440,7 @@ static const struct super_operations hpfs_sops =
         .put_super      = hpfs_put_super,
         .statfs         = hpfs_statfs,
         .remount_fs     = hpfs_remount_fs,
+        .show_options   = generic_show_options,
 };
 
 static int hpfs_fill_super(struct super_block *s, void *options, int silent)
@@ -454,6 +463,8 @@ static int hpfs_fill_super(struct super_block *s, void *options, int silent)
 
         int o;
 
+        save_mount_options(s, options);
+
         sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
         if (!sbi)
                 return -ENOMEM;