SLES10 Fixes (part 9)

- Proper ioctl() 32/64-bit binary compatibility.  We need to ensure the
  ioctl data itself is always packed the same for 32/64-bit binaries.
  Additionally, the correct thing to do is encode this size in bytes
  as part of the command using _IOC_SIZE().
- Minor formatting changes to respect the 80 character limit.
- Move all SPLAT_SUBSYSTEM_* defines in to splat-ctl.h.
- Increase SPLAT_SUBSYSTEM_UNKNOWN because we were getting close
  to accidentally using it for a real registered subsystem.

module/splat/splat-atomic.c

@@ -26,7 +26,6 @@
 
 #include "splat-internal.h"
 
-#define SPLAT_SUBSYSTEM_ATOMIC		0x0b00
 #define SPLAT_ATOMIC_NAME		"atomic"
 #define SPLAT_ATOMIC_DESC		"Kernel Atomic Tests"
 

module/splat/splat-condvar.c

@@ -26,7 +26,6 @@
 
 #include "splat-internal.h"
 
-#define SPLAT_SUBSYSTEM_CONDVAR		0x0500
 #define SPLAT_CONDVAR_NAME		"condvar"
 #define SPLAT_CONDVAR_DESC		"Kernel Condition Variable Tests"
 

module/splat/splat-ctl.c

@@ -326,11 +326,15 @@ splat_validate(struct file *file, splat_subsystem_t *sub, int cmd, void *arg)
 }
 
 static int
-splat_ioctl_cfg(struct file *file, unsigned long arg)
+splat_ioctl_cfg(struct file *file, unsigned int cmd, unsigned long arg)
 {
 	splat_cfg_t kcfg;
 	int rc = 0;
 
+	/* User and kernel space agree about arg size */
+	if (_IOC_SIZE(cmd) != sizeof(kcfg))
+		return -EBADMSG;
+
 	if (copy_from_user(&kcfg, (splat_cfg_t *)arg, sizeof(kcfg)))
 		return -EFAULT;
 
@@ -362,7 +366,7 @@ splat_ioctl_cfg(struct file *file, unsigned long arg)
 		case SPLAT_CFG_SUBSYSTEM_LIST:
 			/* cfg_arg1 - Unused
 			 * cfg_rc1  - Set to number of subsystems
-			 * cfg_data.splat_subsystems - Populated with subsystems
+			 * cfg_data.splat_subsystems - Set with subsystems
 			 */
 			rc = splat_subsystem_list(&kcfg, arg);
 			break;
@@ -380,7 +384,8 @@ splat_ioctl_cfg(struct file *file, unsigned long arg)
 			rc = splat_test_list(&kcfg, arg);
 			break;
 		default:
-			splat_print(file, "Bad config command %d\n", kcfg.cfg_cmd);
+			splat_print(file, "Bad config command %d\n",
+				    kcfg.cfg_cmd);
 			rc = -EINVAL;
 			break;
 	}
@@ -389,13 +394,17 @@ splat_ioctl_cfg(struct file *file, unsigned long arg)
 }
 
 static int
-splat_ioctl_cmd(struct file *file, unsigned long arg)
+splat_ioctl_cmd(struct file *file, unsigned int cmd, unsigned long arg)
 {
 	splat_subsystem_t *sub;
 	splat_cmd_t kcmd;
 	int rc = -EINVAL;
 	void *data = NULL;
 
+	/* User and kernel space agree about arg size */
+	if (_IOC_SIZE(cmd) != sizeof(kcmd))
+		return -EBADMSG;
+
 	if (copy_from_user(&kcmd, (splat_cfg_t *)arg, sizeof(kcmd)))
 		return -EFAULT;
 
@@ -432,7 +441,7 @@ splat_ioctl_cmd(struct file *file, unsigned long arg)
 
 static int
 splat_ioctl(struct inode *inode, struct file *file,
-	  unsigned int cmd, unsigned long arg)
+	    unsigned int cmd, unsigned long arg)
 {
         unsigned int minor = iminor(file->f_dentry->d_inode);
 	int rc = 0;
@@ -446,10 +455,10 @@ splat_ioctl(struct inode *inode, struct file *file,
 
 	switch (cmd) {
 		case SPLAT_CFG:
-			rc = splat_ioctl_cfg(file, arg);
+			rc = splat_ioctl_cfg(file, cmd, arg);
 			break;
 		case SPLAT_CMD:
-			rc = splat_ioctl_cmd(file, arg);
+			rc = splat_ioctl_cmd(file, cmd, arg);
 			break;
 		default:
 			splat_print(file, "Bad ioctl command %d\n", cmd);

module/splat/splat-generic.c

@@ -26,7 +26,6 @@
 
 #include "splat-internal.h"
 
-#define SPLAT_SUBSYSTEM_GENERIC		0x0d00
 #define SPLAT_GENERIC_NAME		"generic"
 #define SPLAT_GENERIC_DESC		"Kernel Generic Tests"
 

module/splat/splat-kmem.c

@@ -26,7 +26,6 @@
 
 #include "splat-internal.h"
 
-#define SPLAT_SUBSYSTEM_KMEM		0x0100
 #define SPLAT_KMEM_NAME			"kmem"
 #define SPLAT_KMEM_DESC			"Kernel Malloc/Slab Tests"
 

module/splat/splat-kobj.c

@@ -26,7 +26,6 @@
 
 #include "splat-internal.h"
 
-#define SPLAT_SUBSYSTEM_KOBJ		0x0a00
 #define SPLAT_KOBJ_NAME			"kobj"
 #define SPLAT_KOBJ_DESC			"Kernel Kobj Tests"
 

module/splat/splat-list.c

@@ -26,7 +26,6 @@
 
 #include "splat-internal.h"
 
-#define SPLAT_SUBSYSTEM_LIST		0x0c00
 #define SPLAT_LIST_NAME			"list"
 #define SPLAT_LIST_DESC			"Kernel List Tests"
 

module/splat/splat-mutex.c

@@ -26,7 +26,6 @@
 
 #include "splat-internal.h"
 
-#define SPLAT_SUBSYSTEM_MUTEX		0x0400
 #define SPLAT_MUTEX_NAME		"mutex"
 #define SPLAT_MUTEX_DESC		"Kernel Mutex Tests"
 

module/splat/splat-random.c

@@ -26,7 +26,6 @@
 
 #include "splat-internal.h"
 
-#define SPLAT_SUBSYSTEM_KRNG		0x0300
 #define SPLAT_KRNG_NAME			"krng"
 #define SPLAT_KRNG_DESC			"Kernel Random Number Generator Tests"
 

module/splat/splat-rwlock.c

@@ -26,7 +26,6 @@
 
 #include "splat-internal.h"
 
-#define SPLAT_SUBSYSTEM_RWLOCK		0x0700
 #define SPLAT_RWLOCK_NAME		"rwlock"
 #define SPLAT_RWLOCK_DESC		"Kernel RW Lock Tests"
 

module/splat/splat-taskq.c

@@ -26,7 +26,6 @@
 
 #include "splat-internal.h"
 
-#define SPLAT_SUBSYSTEM_TASKQ		0x0200
 #define SPLAT_TASKQ_NAME		"taskq"
 #define SPLAT_TASKQ_DESC		"Kernel Task Queue Tests"
 

module/splat/splat-thread.c

@@ -26,7 +26,6 @@
 
 #include "splat-internal.h"
 
-#define SPLAT_SUBSYSTEM_THREAD		0x0600
 #define SPLAT_THREAD_NAME		"thread"
 #define SPLAT_THREAD_DESC		"Kernel Thread Tests"
 

module/splat/splat-time.c

@@ -26,7 +26,6 @@
 
 #include "splat-internal.h"
 
-#define SPLAT_SUBSYSTEM_TIME		0x0800
 #define SPLAT_TIME_NAME			"time"
 #define SPLAT_TIME_DESC			"Kernel Time Tests"
 

module/splat/splat-vnode.c

@@ -27,7 +27,6 @@
 #include "splat-internal.h"
 #include <linux/rcupdate.h>
 
-#define SPLAT_SUBSYSTEM_VNODE		0x0900
 #define SPLAT_VNODE_NAME		"vnode"
 #define SPLAT_VNODE_DESC		"Kernel Vnode Tests"