1 files changed, 148 insertions, 0 deletions
diff --git a/fs/jfs/ioctl.c b/fs/jfs/ioctl.c
new file mode 100644
index 00000000..f19d1e04
--- /dev/null
+++ b/fs/jfs/ioctl.c
@@ -0,0 +1,148 @@
+/*
+ * linux/fs/jfs/ioctl.c
+ *
+ * Copyright (C) 2006 Herbert Poetzl
+ * adapted from Remy Card's ext2/ioctl.c
+ */
+
+#include <linux/fs.h>
+#include <linux/ctype.h>
+#include <linux/capability.h>
+#include <linux/mount.h>
+#include <linux/time.h>
+#include <linux/sched.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,	FS_NOATIME_FL},
+	{JFS_DIRSYNC_FL,	FS_DIRSYNC_FL},
+	{JFS_SYNC_FL,		FS_SYNC_FL},
+	{JFS_SECRM_FL,		FS_SECRM_FL},
+	{JFS_UNRM_FL,		FS_UNRM_FL},
+	{JFS_APPEND_FL,		FS_APPEND_FL},
+	{JFS_IMMUTABLE_FL,	FS_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;
+}
+
+
+long jfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+{
+	struct inode *inode = filp->f_dentry->d_inode;
+	struct jfs_inode_info *jfs_inode = JFS_IP(inode);
+	unsigned int flags;
+
+	switch (cmd) {
+	case JFS_IOC_GETFLAGS:
+		jfs_get_inode_flags(jfs_inode);
+		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;
+		int err;
+
+		err = mnt_want_write_file(filp);
+		if (err)
+			return err;
+
+		if (!inode_owner_or_capable(inode)) {
+			err = -EACCES;
+			goto setflags_out;
+		}
+		if (get_user(flags, (int __user *) arg)) {
+			err = -EFAULT;
+			goto setflags_out;
+		}
+
+		flags = jfs_map_ext2(flags, 1);
+		if (!S_ISDIR(inode->i_mode))
+			flags &= ~JFS_DIRSYNC_FL;
+
+		/* Is it quota file? Do not allow user to mess with it */
+		if (IS_NOQUOTA(inode)) {
+			err = -EPERM;
+			goto setflags_out;
+		}
+
+		/* Lock against other parallel changes of flags */
+		mutex_lock(&inode->i_mutex);
+
+		jfs_get_inode_flags(jfs_inode);
+		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)) {
+				mutex_unlock(&inode->i_mutex);
+				err = -EPERM;
+				goto setflags_out;
+			}
+		}
+
+		flags = flags & JFS_FL_USER_MODIFIABLE;
+		flags |= oldflags & ~JFS_FL_USER_MODIFIABLE;
+		jfs_inode->mode2 = flags;
+
+		jfs_set_inode_flags(inode);
+		mutex_unlock(&inode->i_mutex);
+		inode->i_ctime = CURRENT_TIME_SEC;
+		mark_inode_dirty(inode);
+setflags_out:
+		mnt_drop_write_file(filp);
+		return err;
+	}
+	default:
+		return -ENOTTY;
+	}
+}
+
+#ifdef CONFIG_COMPAT
+long jfs_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+{
+	/* While these ioctl numbers defined with 'long' and have different
+	 * numbers than the 64bit ABI,
+	 * the actual implementation only deals with ints and is compatible.
+	 */
+	switch (cmd) {
+	case JFS_IOC_GETFLAGS32:
+		cmd = JFS_IOC_GETFLAGS;
+		break;
+	case JFS_IOC_SETFLAGS32:
+		cmd = JFS_IOC_SETFLAGS;
+		break;
+	}
+	return jfs_ioctl(filp, cmd, arg);
+}
+#endif