Decode mtd/ubi ioctls

Been playing with UBI of late and it'd help if I could see what it was
doing.  Not entirely sure about the decoding of UBI_IOCVOLUP -- it takes
a pointer to a 64bit value, not a strict.

* util.c (MAX, MIN): Move to ...
* defs.h (MAX, MIN): ... here.
(CLAMP): Define.
(ubi_ioctl): New prototype.
* ioctl.c (ioctl_decode): Call ubi_ioctl when code is 'o' or 'O'.
* mtd.c: Include ubi user API header.
(ubi_volume_types): New enum decode.
(ubi_volume_props): Likewise.
(ubi_ioctl): Define.
* linux/ubi-user.h: Import from linux 3.8.

1 files changed, 10 insertions, 0 deletions

diff --git a/defs.h b/defs.h
index 42ca88e..3873c10 100644
--- a/defs.h
+++ b/defs.h
@@ -86,6 +86,15 @@ extern char *stpcpy(char *dst, const char *src);
 
 #define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
 
+/* macros */
+#ifndef MAX
+# define MAX(a, b)		(((a) > (b)) ? (a) : (b))
+#endif
+#ifndef MIN
+# define MIN(a, b)		(((a) < (b)) ? (a) : (b))
+#endif
+#define CLAMP(val, min, max) MIN(MAX(min, val), max)
+
 /* Glibc has an efficient macro for sigemptyset
  * (it just does one or two assignments of 0 to internal vector of longs).
  */
@@ -684,6 +693,7 @@ extern int rtc_ioctl(struct tcb *, long, long);
 extern int scsi_ioctl(struct tcb *, long, long);
 extern int block_ioctl(struct tcb *, long, long);
 extern int mtd_ioctl(struct tcb *, long, long);
+extern int ubi_ioctl(struct tcb *, long, long);
 extern int loop_ioctl(struct tcb *, long, long);
 
 extern int tv_nz(struct timeval *);