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f2fs: add compat_ioctl to provide backward compatability

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adding compat_ioctl to provide support for backward comptability - 32bit binary
execution on 64bit kernel.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Amit Sahrawat <a.sahrawat@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
This commit is contained in:
Namjae Jeon
2013-02-04 23:41:41 +09:00
committed by Jaegeuk Kim
parent b7250d2d84
commit e975082411
2 changed files with 36 additions and 0 deletions
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21
fs/f2fs/file.c
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@@ -15,6 +15,7 @@
#include <linux/writeback.h>
#include <linux/falloc.h>
#include <linux/types.h>
#include <linux/compat.h>
#include <linux/uaccess.h>
#include <linux/mount.h>
@@ -634,6 +635,23 @@ out:
}
}
#ifdef CONFIG_COMPAT
long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
switch (cmd) {
case F2FS_IOC32_GETFLAGS:
cmd = F2FS_IOC_GETFLAGS;
break;
case F2FS_IOC32_SETFLAGS:
cmd = F2FS_IOC_SETFLAGS;
break;
default:
return -ENOIOCTLCMD;
}
return f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
}
#endif
const struct file_operations f2fs_file_operations = {
.llseek = generic_file_llseek,
.read = do_sync_read,
@@ -645,6 +663,9 @@ const struct file_operations f2fs_file_operations = {
.fsync = f2fs_sync_file,
.fallocate = f2fs_fallocate,
.unlocked_ioctl = f2fs_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = f2fs_compat_ioctl,
#endif
.splice_read = generic_file_splice_read,
.splice_write = generic_file_splice_write,
};