udf: Treat symlink component of type 2 as /

Currently, we ignore symlink component of type 2. But mkisofs and other OS'
seem to treat it as / so do the same for compatibility.

Reported-by: "Gábor S." <otnaccess@hotmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>

1 files changed, 10 insertions, 4 deletions

diff --git a/fs/udf/symlink.c b/fs/udf/symlink.c
index b1d4488b0f14..d7c6dbe4194b 100644
--- a/fs/udf/symlink.c
+++ b/fs/udf/symlink.c
@@ -41,10 +41,16 @@ static void udf_pc_to_char(struct super_block *sb, unsigned char *from,
                 pc = (struct pathComponent *)(from + elen);
                 switch (pc->componentType) {
                 case 1:
-                        if (pc->lengthComponentIdent == 0) {
-                                p = to;
-                                *p++ = '/';
-                        }
+                        /*
+                         * Symlink points to some place which should be agreed
+                         * upon between originator and receiver of the media. Ignore.
+                         */
+                        if (pc->lengthComponentIdent > 0)
+                                break;
+                        /* Fall through */
+                case 2:
+                        p = to;
+                        *p++ = '/';
                         break;
                 case 3:
                         memcpy(p, "../", 3);