linux-user: Add support for FDFMT<BEG|TRK|END> ioctls

FDFMTBEG, FDFMTTRK, and FDFMTEND ioctls provide means for controlling
formatting of a floppy drive.

FDFMTTRK's third agrument is a pointer to the structure:

struct format_descr {
    unsigned int device,head,track;
};

defined in Linux kernel header <linux/fd.h>.

Since all fields of the structure are of type 'unsigned int', there is
no need to define "target_format_descr".

FDFMTBEG and FDFMTEND ioctls do not use the third argument.

Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Message-Id: <1579214991-19602-9-git-send-email-aleksandar.markovic@rt-rk.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>

linux-user/ioctls.h

@@ -115,6 +115,9 @@
      IOCTL(FDMSGON, 0, TYPE_NULL)
      IOCTL(FDMSGOFF, 0, TYPE_NULL)
      IOCTL(FDSETEMSGTRESH, 0, TYPE_NULL)
+     IOCTL(FDFMTBEG, 0, TYPE_NULL)
+     IOCTL(FDFMTTRK, IOC_W, MK_PTR(MK_STRUCT(STRUCT_format_descr)))
+     IOCTL(FDFMTEND, 0, TYPE_NULL)
      IOCTL(FDFLUSH, 0, TYPE_NULL)
      IOCTL(FDSETMAXERRS, IOC_W, MK_PTR(MK_STRUCT(STRUCT_floppy_max_errors)))
      IOCTL(FDGETMAXERRS, IOC_R, MK_PTR(MK_STRUCT(STRUCT_floppy_max_errors)))

linux-user/syscall_defs.h

@@ -899,6 +899,9 @@ struct target_pollfd {
 
 #define TARGET_FDMSGON        TARGET_IO(2, 0x45)
 #define TARGET_FDMSGOFF       TARGET_IO(2, 0x46)
+#define TARGET_FDFMTBEG       TARGET_IO(2, 0x47)
+#define TARGET_FDFMTTRK      TARGET_IOW(2, 0x48, struct format_descr)
+#define TARGET_FDFMTEND       TARGET_IO(2, 0x49)
 #define TARGET_FDSETEMSGTRESH TARGET_IO(2, 0x4a)
 #define TARGET_FDFLUSH        TARGET_IO(2, 0x4b)
 #define TARGET_FDSETMAXERRS  TARGET_IOW(2, 0x4c, struct floppy_max_errors)

linux-user/syscall_types.h

@@ -261,6 +261,11 @@ STRUCT(blkpg_ioctl_arg,
        TYPE_INT, /* datalen */
        TYPE_PTRVOID) /* data */
 
+STRUCT(format_descr,
+       TYPE_INT,     /* device */
+       TYPE_INT,     /* head */
+       TYPE_INT)     /* track */
+
 STRUCT(floppy_max_errors,
        TYPE_INT, /* abort */
        TYPE_INT, /* read_track */