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authorRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2011-02-03 15:26:17 +0300
committerRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2011-03-08 08:58:30 +0300
commit828b1c50ae11e6dda68f8dfefe43b74c7182b157 (patch)
tree9c258f65382865edb71e06bf11007071fb058806 /fs/nilfs2/ioctl.c
parentcde98f0f84ccff78e87235cb7b551747d6ad00de (diff)
downloadlinux-828b1c50ae11e6dda68f8dfefe43b74c7182b157.tar.xz
nilfs2: add compat ioctl
The current FS_IOC_GETFLAGS/SETFLAGS/GETVERSION will fail if application is 32 bit and kernel is 64 bit. This issue is avoidable by adding compat_ioctl method. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Diffstat (limited to 'fs/nilfs2/ioctl.c')
-rw-r--r--fs/nilfs2/ioctl.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/fs/nilfs2/ioctl.c b/fs/nilfs2/ioctl.c
index 3aad6413aba4..d89173edd7fe 100644
--- a/fs/nilfs2/ioctl.c
+++ b/fs/nilfs2/ioctl.c
@@ -26,6 +26,7 @@
#include <linux/capability.h> /* capable() */
#include <linux/uaccess.h> /* copy_from_user(), copy_to_user() */
#include <linux/vmalloc.h>
+#include <linux/compat.h> /* compat_ptr() */
#include <linux/mount.h> /* mnt_want_write(), mnt_drop_write() */
#include <linux/nilfs2_fs.h>
#include "nilfs.h"
@@ -766,3 +767,23 @@ long nilfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
return -ENOTTY;
}
}
+
+#ifdef CONFIG_COMPAT
+long nilfs_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+{
+ switch (cmd) {
+ case FS_IOC32_GETFLAGS:
+ cmd = FS_IOC_GETFLAGS;
+ break;
+ case FS_IOC32_SETFLAGS:
+ cmd = FS_IOC_SETFLAGS;
+ break;
+ case FS_IOC32_GETVERSION:
+ cmd = FS_IOC_GETVERSION;
+ break;
+ default:
+ return -ENOIOCTLCMD;
+ }
+ return nilfs_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
+}
+#endif