1 files changed, 107 insertions, 0 deletions

diff --git a/fs/jfs/ioctl.c b/fs/jfs/ioctl.c
new file mode 100644
index 000000000000..67b3774820eb
--- /dev/null
+++ b/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;
+        }
+}
+