[PATCH] hfs: NLS support

This adds NLS support to HFS.  Using the kernel options iocharset and codepage
it's possible to map the disk encoding to a local mapping.  If these options
are not used, it falls back to the old direct mapping.

Signed-off-by: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 43 insertions, 0 deletions

diff --git a/fs/hfs/super.c b/fs/hfs/super.c
index fd78414ee7e4..c5074aeafcae 100644
--- a/fs/hfs/super.c
+++ b/fs/hfs/super.c
@@ -17,6 +17,7 @@
 #include <linux/blkdev.h>
 #include <linux/mount.h>
 #include <linux/init.h>
+#include <linux/nls.h>
 #include <linux/parser.h>
 #include <linux/seq_file.h>
 #include <linux/vfs.h>
@@ -130,6 +131,10 @@ static int hfs_show_options(struct seq_file *seq, struct vfsmount *mnt)
                 seq_printf(seq, ",part=%u", sbi->part);
         if (sbi->session >= 0)
                 seq_printf(seq, ",session=%u", sbi->session);
+        if (sbi->nls_disk)
+                seq_printf(seq, ",codepage=%s", sbi->nls_disk->charset);
+        if (sbi->nls_io)
+                seq_printf(seq, ",iocharset=%s", sbi->nls_io->charset);
         if (sbi->s_quiet)
                 seq_printf(seq, ",quiet");
         return 0;
@@ -163,6 +168,7 @@ static struct super_operations hfs_super_operations = {
 enum {
         opt_uid, opt_gid, opt_umask, opt_file_umask, opt_dir_umask,
         opt_part, opt_session, opt_type, opt_creator, opt_quiet,
+        opt_codepage, opt_iocharset,
         opt_err
 };
 
@@ -177,6 +183,8 @@ static match_table_t tokens = {
         { opt_type, "type=%s" },
         { opt_creator, "creator=%s" },
         { opt_quiet, "quiet" },
+        { opt_codepage, "codepage=%s" },
+        { opt_iocharset, "iocharset=%s" },
         { opt_err, NULL }
 };
 
@@ -282,11 +290,46 @@ static int parse_options(char *options, struct hfs_sb_info *hsb)
                 case opt_quiet:
                         hsb->s_quiet = 1;
                         break;
+                case opt_codepage:
+                        if (hsb->nls_disk) {
+                                printk("HFS+-fs: unable to change codepage\n");
+                                return 0;
+                        }
+                        p = match_strdup(&args[0]);
+                        hsb->nls_disk = load_nls(p);
+                        if (!hsb->nls_disk) {
+                                printk("HFS+-fs: unable to load codepage \"%s\"\n", p);
+                                kfree(p);
+                                return 0;
+                        }
+                        kfree(p);
+                        break;
+                case opt_iocharset:
+                        if (hsb->nls_io) {
+                                printk("HFS: unable to change iocharset\n");
+                                return 0;
+                        }
+                        p = match_strdup(&args[0]);
+                        hsb->nls_io = load_nls(p);
+                        if (!hsb->nls_io) {
+                                printk("HFS: unable to load iocharset \"%s\"\n", p);
+                                kfree(p);
+                                return 0;
+                        }
+                        kfree(p);
+                        break;
                 default:
                         return 0;
                 }
         }
 
+        if (hsb->nls_disk && !hsb->nls_io) {
+                hsb->nls_io = load_nls_default();
+                if (!hsb->nls_io) {
+                        printk("HFS: unable to load default iocharset\n");
+                        return 0;
+                }
+        }
         hsb->s_dir_umask &= 0777;
         hsb->s_file_umask &= 0577;