JFS: Add missing file from fa3241d24c

My mistake here.  I failed to checkin fs/jfs/ioctl.c

Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>

fs/jfs/ioctl.c

@@ -0,0 +1,107 @@
+/*
+ * linux/fs/jfs/ioctl.c
+ *
+ * Copyright (C) 2006 Herbert Poetzl
+ * adapted from Remy Card's ext2/ioctl.c
+ */
+
+#include <linux/fs.h>
+#include <linux/ext2_fs.h>
+#include <linux/ctype.h>
+#include <linux/capability.h>
+#include <linux/time.h>
+#include <asm/current.h>
+#include <asm/uaccess.h>
+
+#include "jfs_incore.h"
+#include "jfs_dinode.h"
+#include "jfs_inode.h"
+
+
+static struct {
+	long jfs_flag;
+	long ext2_flag;
+} jfs_map[] = {
+	{JFS_NOATIME_FL, EXT2_NOATIME_FL},
+	{JFS_DIRSYNC_FL, EXT2_DIRSYNC_FL},
+	{JFS_SYNC_FL, EXT2_SYNC_FL},
+	{JFS_SECRM_FL, EXT2_SECRM_FL},
+	{JFS_UNRM_FL, EXT2_UNRM_FL},
+	{JFS_APPEND_FL, EXT2_APPEND_FL},
+	{JFS_IMMUTABLE_FL, EXT2_IMMUTABLE_FL},
+	{0, 0},
+};
+
+static long jfs_map_ext2(unsigned long flags, int from)
+{
+	int index=0;
+	long mapped=0;
+
+	while (jfs_map[index].jfs_flag) {
+		if (from) {
+			if (jfs_map[index].ext2_flag & flags)
+				mapped |= jfs_map[index].jfs_flag;
+		} else {
+			if (jfs_map[index].jfs_flag & flags)
+				mapped |= jfs_map[index].ext2_flag;
+		}
+		index++;
+	}
+	return mapped;
+}
+
+
+int jfs_ioctl(struct inode * inode, struct file * filp, unsigned int cmd,
+		unsigned long arg)
+{
+	struct jfs_inode_info *jfs_inode = JFS_IP(inode);
+	unsigned int flags;
+
+	switch (cmd) {
+	case JFS_IOC_GETFLAGS:
+		flags = jfs_inode->mode2 & JFS_FL_USER_VISIBLE;
+		flags = jfs_map_ext2(flags, 0);
+		return put_user(flags, (int __user *) arg);
+	case JFS_IOC_SETFLAGS: {
+		unsigned int oldflags;
+
+		if (IS_RDONLY(inode))
+			return -EROFS;
+
+		if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
+			return -EACCES;
+
+		if (get_user(flags, (int __user *) arg))
+			return -EFAULT;
+
+		flags = jfs_map_ext2(flags, 1);
+		if (!S_ISDIR(inode->i_mode))
+			flags &= ~JFS_DIRSYNC_FL;
+
+		oldflags = jfs_inode->mode2;
+
+		/*
+		 * The IMMUTABLE and APPEND_ONLY flags can only be changed by
+		 * the relevant capability.
+		 */
+		if ((oldflags & JFS_IMMUTABLE_FL) ||
+			((flags ^ oldflags) &
+			(JFS_APPEND_FL | JFS_IMMUTABLE_FL))) {
+			if (!capable(CAP_LINUX_IMMUTABLE))
+				return -EPERM;
+		}
+
+		flags = flags & JFS_FL_USER_MODIFIABLE;
+		flags |= oldflags & ~JFS_FL_USER_MODIFIABLE;
+		jfs_inode->mode2 = flags;
+
+		jfs_set_inode_flags(inode);
+		inode->i_ctime = CURRENT_TIME_SEC;
+		mark_inode_dirty(inode);
+		return 0;
+	}
+	default:
+		return -ENOTTY;
+	}
+}
+