Re: Submitting patches for unmaintained areas (Solaris x86 UFS bug)

[Alex Kiernan]

On Wed, 13 Oct 2004 12:06:29 +0100, Alex Kiernan <alex.kiernan@xxxxxxxxx> wrote:
> I've run into a bug in the UFS reading code (on Solaris x86 the
> major/minor numbers are in 2nd indirect offset not the first), so I've
> patched it & bugzilled it
> (http://bugzilla.kernel.org/show_bug.cgi?id=3475).
> 
> But where do I go from here? There doesn't seem to be a maintainer for
> UFS so I can't send it there.
> 

After advice from Alan (thanks), here's the patch which addresses the
problem I'm seeing. Specifically it appears that on x86 Solaris stores
the major/minor device numbers in the 2nd indirect block, not the
first.

-- 
Alex Kiernan
===== namei.c 1.24 vs edited =====
--- 1.24/fs/ufs/namei.c	2004-03-12 09:30:20 +00:00
+++ edited/namei.c	2004-09-27 16:52:58 +01:00
@@ -30,6 +30,7 @@
 #include <linux/smp_lock.h>
 #include <linux/buffer_head.h>
 #include "swab.h"	/* will go away - see comment in mknod() */
+#include "util.h"
 
 /*
 #undef UFS_NAMEI_DEBUG
@@ -125,8 +126,8 @@
 	if (!IS_ERR(inode)) {
 		init_special_inode(inode, mode, rdev);
 		/* NOTE: that'll go when we get wide dev_t */
-		UFS_I(inode)->i_u1.i_data[0] = cpu_to_fs32(inode->i_sb,
-							old_encode_dev(rdev));
+		ufs_set_inode_dev(inode->i_sb, UFS_I(inode),
+			old_encode_dev(rdev));
 		mark_inode_dirty(inode);
 		lock_kernel();
 		err = ufs_add_nondir(dentry, inode);
===== inode.c 1.24 vs edited =====
--- 1.24/fs/ufs/inode.c	2004-09-17 07:58:42 +01:00
+++ edited/inode.c	2004-09-27 16:50:47 +01:00
@@ -629,7 +629,7 @@
 		}
 	} else
 		init_special_inode(inode, inode->i_mode,
-			old_decode_dev(fs32_to_cpu(sb, ufsi->i_u1.i_data[0])));
+			old_decode_dev(ufs_get_inode_dev(sb, ufsi)));
 
 	brelse (bh);
 
@@ -705,7 +705,7 @@
 		}
 	} else   /* TODO  : here ...*/
 		init_special_inode(inode, inode->i_mode,
-			old_decode_dev(fs32_to_cpu(sb, ufsi->i_u1.i_data[0])));
+			old_decode_dev(ufs_get_inode_dev(sb, ufsi)));
 
 	brelse(bh);
 
===== util.h 1.9 vs edited =====
--- 1.9/fs/ufs/util.h	2004-03-12 09:30:20 +00:00
+++ edited/util.h	2004-09-27 16:49:21 +01:00
@@ -223,6 +223,24 @@
 	inode->ui_u1.oldids.ui_sgid =  cpu_to_fs16(sb, value);
 }
 
+static inline u32
+ufs_get_inode_dev(struct super_block *sb, struct ufs_inode_info *inode)
+{
+	if ((UFS_SB(sb)->s_flags & UFS_ST_MASK) == UFS_ST_SUNx86)
+		return fs32_to_cpu(sb, ufsi->i_u1.i_data[1]);
+	else
+		return fs32_to_cpu(sb, ufsi->i_u1.i_data[0]);
+}
+
+static inline void
+ufs_set_inode_dev(struct super_block *sb, struct ufs_inode_info *inode, u32 value)
+{
+	if ((UFS_SB(sb)->s_flags & UFS_ST_MASK) == UFS_ST_SUNx86)
+		ufsi->i_u1.i_data[1] = cpu_to_fs32(sb, value);
+	else
+		ufsi->i_u1.i_data[0] = cpu_to_fs32(sb, value);
+}
+
 
 /*
  * These functions manipulate ufs buffers