commit 586d232b191b776a1c6d51c10c662b8b3e238fdf
author Mark Fasheh <mark.fasheh@oracle.com> Fri Mar 09 15:56:28 2007 -0800
committer Mark Fasheh <mark.fasheh@oracle.com> Wed May 02 15:07:16 2007 -0700
tree 8963261875e046d405d6e23b7ee67ff7c03f5c91
parent 40caf5ea5a7d47f8a33e26b63ca81dea4b5109d2

ocfs2: Implement compat_ioctl()

We need this to support 32 bit system calls on 64 bit kernels.

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>

fs/ocfs2/file.c

diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index 520a2a6..3b5a157 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -1853,6 +1853,9 @@
 	.aio_read	= ocfs2_file_aio_read,
 	.aio_write	= ocfs2_file_aio_write,
 	.ioctl		= ocfs2_ioctl,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl   = ocfs2_compat_ioctl,
+#endif
 	.splice_read	= ocfs2_file_splice_read,
 	.splice_write	= ocfs2_file_splice_write,
 };
@@ -1862,4 +1865,7 @@
 	.readdir	= ocfs2_readdir,
 	.fsync		= ocfs2_sync_file,
 	.ioctl		= ocfs2_ioctl,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl   = ocfs2_compat_ioctl,
+#endif
 };

fs/ocfs2/ioctl.c

diff --git a/fs/ocfs2/ioctl.c b/fs/ocfs2/ioctl.c
index 4768be5..7e59c93 100644
--- a/fs/ocfs2/ioctl.c
+++ b/fs/ocfs2/ioctl.c
@@ -134,3 +134,26 @@
 	}
 }
 
+#ifdef CONFIG_COMPAT
+long ocfs2_compat_ioctl(struct file *file, unsigned cmd, unsigned long arg)
+{
+	struct inode *inode = file->f_path.dentry->d_inode;
+	int ret;
+
+	switch (cmd) {
+	case OCFS2_IOC32_GETFLAGS:
+		cmd = OCFS2_IOC_GETFLAGS;
+		break;
+	case OCFS2_IOC32_SETFLAGS:
+		cmd = OCFS2_IOC_SETFLAGS;
+		break;
+	default:
+		return -ENOIOCTLCMD;
+	}
+
+	lock_kernel();
+	ret = ocfs2_ioctl(inode, file, cmd, arg);
+	unlock_kernel();
+	return ret;
+}
+#endif

fs/ocfs2/ioctl.h

diff --git a/fs/ocfs2/ioctl.h b/fs/ocfs2/ioctl.h
index 4a7c829..4d6c4f4 100644
--- a/fs/ocfs2/ioctl.h
+++ b/fs/ocfs2/ioctl.h
@@ -12,5 +12,6 @@
 
 int ocfs2_ioctl(struct inode * inode, struct file * filp,
 	unsigned int cmd, unsigned long arg);
+long ocfs2_compat_ioctl(struct file *file, unsigned cmd, unsigned long arg);
 
 #endif /* OCFS2_IOCTL_H */

fs/ocfs2/ocfs2_fs.h

diff --git a/fs/ocfs2/ocfs2_fs.h b/fs/ocfs2/ocfs2_fs.h
index 7130647..f0d9eb0 100644
--- a/fs/ocfs2/ocfs2_fs.h
+++ b/fs/ocfs2/ocfs2_fs.h
@@ -166,6 +166,8 @@
  */
 #define OCFS2_IOC_GETFLAGS	_IOR('f', 1, long)
 #define OCFS2_IOC_SETFLAGS	_IOW('f', 2, long)
+#define OCFS2_IOC32_GETFLAGS	_IOR('f', 1, int)
+#define OCFS2_IOC32_SETFLAGS	_IOW('f', 2, int)
 
 /*
  * Journal Flags (ocfs2_dinode.id1.journal1.i_flags)