[PATCH] udf: fix default mode and dmode options handling

Marcin Slusarz
2008-12-01T23:23:05Z

On Mon, Dec 01, 2008 at 08:28:02PM +0100, Laurent Riffard wrote:
> >> With next-2008-11-28, I was unable to mount an UDF-formatted DVD-RW:
> > Can you check whether attached patch fixes it?
> Current kernel is next-20081128 + reiser4 patches + your patch: it seems to works well now.
> (...)
> Tested-by: Laurent Riffard <laurent.riffard@free.fr>

Thanks!

Jan, please apply this patch:

---
From: Marcin Slusarz <marcin.slusarz@gmail.com>
Subject: [PATCH] udf: fix default mode and dmode options handling

On x86 (and several other archs) mode_t is defined as "unsigned short"
and comparing unsigned shorts to negative ints is broken (because short
is promoted to int and then compared). Fix it.

Reported-and-tested-by: Laurent Riffard <laurent.riffard@free.fr>
Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
---
fs/udf/inode.c | 4 ++--
fs/udf/super.c | 8 ++++----
fs/udf/udf_sb.h | 2 ++
3 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index 6612a27..2d7e56a 100644
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -1222,10 +1222,10 @@ static void udf_fill_inode(struct inode *inode, struct buffer_head *bh)
iinfo->i_lenExtents = inode->i_size;

if (fe->icbTag.fileType != ICBTAG_FILE_TYPE_DIRECTORY &&
- sbi->s_fmode != -1)
+ sbi->s_fmode != UDF_INVALID_MODE)
inode->i_mode = sbi->s_fmode;
else if (fe->icbTag.fileType == ICBTAG_FILE_TYPE_DIRECTORY &&
- sbi->s_dmode != -1)
+ sbi->s_dmode != UDF_INVALID_MODE)
inode->i_mode = sbi->s_dmode;
else
inode->i_mode = udf_convert_permissions(fe);
diff --git a/fs/udf/super.c b/fs/udf/super.c
index e5d121d..8deaa61 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -284,9 +284,9 @@ static int udf_show_options(struct seq_file *seq, struct vfsmount *mnt)
seq_printf(seq, ",gid=%u", sbi->s_gid);
if (sbi->s_umask != 0)
seq_printf(seq, ",umask=%o", sbi->s_umask);
- if (sbi->s_fmode != -1)
+ if (sbi->s_fmode != UDF_INVALID_MODE)
seq_printf(seq, ",mode=%o", sbi->s_fmode);
- if (sbi->s_dmode != -1)
+ if (sbi->s_dmode != UDF_INVALID_MODE)
seq_printf(seq, ",dmode=%o", sbi->s_dmode);
if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET))
seq_printf(seq, ",session=%u", sbi->s_session);
@@ -1894,8 +1894,8 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
uopt.uid = -1;
uopt.gid = -1;
uopt.umask = 0;
- uopt.fmode = -1;
- uopt.dmode = -1;
+ uopt.fmode = UDF_INVALID_MODE;
+ uopt.dmode = UDF_INVALID_MODE;

sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
if (!sbi)
diff --git a/fs/udf/udf_sb.h b/fs/udf/udf_sb.h
index 5d32c60..158221e 100644
--- a/fs/udf/udf_sb.h
+++ b/fs/udf/udf_sb.h
@@ -48,6 +48,8 @@
#define UDF_SPARABLE_MAP15 0x1522U
#define UDF_METADATA_MAP25 0x2511U

+#define UDF_INVALID_MODE ((mode_t)-1)
+
#pragma pack(1) /* XXX(hch): Why? This file just defines in-core structures */

struct udf_meta_data {
--
1.5.6.4