1 files changed, 95 insertions, 0 deletions

diff --git a/fs/coda/pioctl.c b/fs/coda/pioctl.c
new file mode 100644
index 000000000000..127714936c66
--- /dev/null
+++ b/fs/coda/pioctl.c
@@ -0,0 +1,95 @@
+/*
+ * Pioctl operations for Coda.
+ * Original version: (C) 1996 Peter Braam 
+ * Rewritten for Linux 2.1: (C) 1997 Carnegie Mellon University
+ *
+ * Carnegie Mellon encourages users of this code to contribute improvements
+ * to the Coda project. Contact Peter Braam <coda@cs.cmu.edu>.
+ */
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/time.h>
+#include <linux/fs.h>
+#include <linux/stat.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/namei.h>
+#include <linux/module.h>
+#include <asm/uaccess.h>
+
+#include <linux/coda.h>
+#include <linux/coda_linux.h>
+#include <linux/coda_fs_i.h>
+#include <linux/coda_psdev.h>
+
+/* pioctl ops */
+static int coda_ioctl_permission(struct inode *inode, int mask,
+                                 struct nameidata *nd);
+static int coda_pioctl(struct inode * inode, struct file * filp, 
+                       unsigned int cmd, unsigned long user_data);
+
+/* exported from this file */
+struct inode_operations coda_ioctl_inode_operations =
+{
+        .permission     = coda_ioctl_permission,
+        .setattr        = coda_setattr,
+};
+
+struct file_operations coda_ioctl_operations = {
+        .owner          = THIS_MODULE,
+        .ioctl          = coda_pioctl,
+};
+
+/* the coda pioctl inode ops */
+static int coda_ioctl_permission(struct inode *inode, int mask,
+                                 struct nameidata *nd)
+{
+        return 0;
+}
+
+static int coda_pioctl(struct inode * inode, struct file * filp, 
+                       unsigned int cmd, unsigned long user_data)
+{
+        struct nameidata nd;
+        int error;
+        struct PioctlData data;
+        struct inode *target_inode = NULL;
+        struct coda_inode_info *cnp;
+
+        /* get the Pioctl data arguments from user space */
+        if (copy_from_user(&data, (void __user *)user_data, sizeof(data))) {
+            return -EINVAL;
+        }
+       
+        /* 
+         * Look up the pathname. Note that the pathname is in 
+         * user memory, and namei takes care of this
+         */
+        if ( data.follow ) {
+                error = user_path_walk(data.path, &nd);
+        } else {
+                error = user_path_walk_link(data.path, &nd);
+        }
+                
+        if ( error ) {
+                return error;
+        } else {
+                target_inode = nd.dentry->d_inode;
+        }
+        
+        /* return if it is not a Coda inode */
+        if ( target_inode->i_sb != inode->i_sb ) {
+                path_release(&nd);
+                return  -EINVAL;
+        }
+
+        /* now proceed to make the upcall */
+        cnp = ITOC(target_inode);
+
+        error = venus_pioctl(inode->i_sb, &(cnp->c_fid), cmd, &data);
+
+        path_release(&nd);
+        return error;
+}
+