Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

1 files changed, 41 insertions, 35 deletions

diff --git a/fs/coda/pioctl.c b/fs/coda/pioctl.c
index 773f2ce..ca25d96 100644
--- a/fs/coda/pioctl.c
+++ b/fs/coda/pioctl.c
@@ -1,6 +1,6 @@
 /*
  * Pioctl operations for Coda.
- * Original version: (C) 1996 Peter Braam 
+ * 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
@@ -23,21 +23,22 @@
 #include <linux/coda_fs_i.h>
 #include <linux/coda_psdev.h>
 
+#include <linux/smp_lock.h>
+
 /* pioctl ops */
 static int coda_ioctl_permission(struct inode *inode, int mask);
-static int coda_pioctl(struct inode * inode, struct file * filp, 
-                       unsigned int cmd, unsigned long user_data);
+static long coda_pioctl(struct file *filp, unsigned int cmd,
+			unsigned long user_data);
 
 /* exported from this file */
-const struct inode_operations coda_ioctl_inode_operations =
-{
+const struct inode_operations coda_ioctl_inode_operations = {
 	.permission	= coda_ioctl_permission,
 	.setattr	= coda_setattr,
 };
 
 const struct file_operations coda_ioctl_operations = {
 	.owner		= THIS_MODULE,
-	.ioctl		= coda_pioctl,
+	.unlocked_ioctl	= coda_pioctl,
 };
 
 /* the coda pioctl inode ops */
@@ -46,48 +47,53 @@ static int coda_ioctl_permission(struct inode *inode, int mask)
 	return (mask & MAY_EXEC) ? -EACCES : 0;
 }
 
-static int coda_pioctl(struct inode * inode, struct file * filp, 
-                       unsigned int cmd, unsigned long user_data)
+static long coda_pioctl(struct file *filp, unsigned int cmd,
+			unsigned long user_data)
 {
 	struct path path;
-        int error;
+	int error;
 	struct PioctlData data;
-        struct inode *target_inode = NULL;
-        struct coda_inode_info *cnp;
+	struct inode *inode = filp->f_dentry->d_inode;
+	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(data.path, &path);
-	} else {
-	        error = user_lpath(data.path, &path);
+	lock_kernel();
+
+	/* get the Pioctl data arguments from user space */
+	if (copy_from_user(&data, (void __user *)user_data, sizeof(data))) {
+		error = -EINVAL;
+		goto out;
 	}
-		
-	if ( error ) {
-		return error;
-        } else {
+
+	/*
+	 * Look up the pathname. Note that the pathname is in
+	 * user memory, and namei takes care of this
+	 */
+	if (data.follow)
+		error = user_path(data.path, &path);
+	else
+		error = user_lpath(data.path, &path);
+
+	if (error)
+		goto out;
+	else
 		target_inode = path.dentry->d_inode;
-	}
-	
+
 	/* return if it is not a Coda inode */
-	if ( target_inode->i_sb != inode->i_sb ) {
+	if (target_inode->i_sb != inode->i_sb) {
 		path_put(&path);
-	        return  -EINVAL;
+		error = -EINVAL;
+		goto out;
 	}
 
 	/* now proceed to make the upcall */
-        cnp = ITOC(target_inode);
+	cnp = ITOC(target_inode);
 
 	error = venus_pioctl(inode->i_sb, &(cnp->c_fid), cmd, &data);
 
 	path_put(&path);
-        return error;
-}
 
+out:
+	unlock_kernel();
+	return error;
+}