[PATCH] kill HDIO_GETGEO_BIG_RAW ioctl

HDIO_GETGEO_BIG_RAW is an ide specific hack introduced in 2.3.99-pre3.
There are no known programs using this ioctl.

Its aim was to provide current CHS translation to the user-space,
but very often it provides what driver thinks is a current translation
(drive with LBA have to support only one physical translation, also
 drive may not support chosen translation and there is no return value check).

hdparm -I can be used instead, it provides correct information
(and bogus data is still accessible through /proc/ide/hdX/geometry).

arch/ppc64/kernel/ioctl32.c

@@ -28,34 +28,6 @@
 #define CODE
 #include "compat_ioctl.c"
 
-struct hd_big_geometry32 {
-	unsigned char heads;
-	unsigned char sectors;
-	unsigned int cylinders;
-	u32 start;
-};
-                        
-static int hdio_getgeo_big(unsigned int fd, unsigned int cmd, unsigned long arg)
-{
-	mm_segment_t old_fs = get_fs();
-	struct hd_big_geometry geo;
-	int err;
-	
-	set_fs (KERNEL_DS);
-	err = sys_ioctl(fd, cmd, (unsigned long)&geo);
-	set_fs (old_fs);
-	if (!err) {
-		struct hd_big_geometry32 *up = (struct hd_big_geometry32 *) arg;
-
-		if (put_user(geo.heads, &up->heads) ||
-		    __put_user(geo.sectors, &up->sectors) ||
-		    __put_user(geo.cylinders, &up->cylinders) ||
-		    __put_user(((u32) geo.start), &up->start))
-			err = -EFAULT;
-	}
-	return err;
-}
-
 struct ncp_ioctl_request_32 {
 	unsigned int function;
 	unsigned int size;
@@ -773,7 +745,6 @@ COMPATIBLE_IOCTL(_IOR('p', 20, int[7])) /* RTCGET */
 COMPATIBLE_IOCTL(_IOW('p', 21, int[7])) /* RTCSET */
 
 /* And these ioctls need translation */
-HANDLE_IOCTL(HDIO_GETGEO_BIG_RAW, hdio_getgeo_big)
 
 /* NCPFS */
 HANDLE_IOCTL(NCP_IOC_NCPREQUEST_32, do_ncp_ncprequest)

arch/sparc64/kernel/ioctl32.c

@@ -40,34 +40,6 @@ static __inline__ void *alloc_user_space(long len)
 #define CODE
 #include "compat_ioctl.c"
 
-struct hd_big_geometry32 {
-	unsigned char heads;
-	unsigned char sectors;
-	unsigned int cylinders;
-	u32 start;
-};
-                        
-static int hdio_getgeo_big(unsigned int fd, unsigned int cmd, unsigned long arg)
-{
-	mm_segment_t old_fs = get_fs();
-	struct hd_big_geometry geo;
-	int err;
-	
-	set_fs (KERNEL_DS);
-	err = sys_ioctl(fd, cmd, (unsigned long)&geo);
-	set_fs (old_fs);
-	if (!err) {
-		struct hd_big_geometry32 *up = (struct hd_big_geometry32 *) arg;
-
-		if (put_user(geo.heads, &up->heads) ||
-		    __put_user(geo.sectors, &up->sectors) ||
-		    __put_user(geo.cylinders, &up->cylinders) ||
-		    __put_user(((u32) geo.start), &up->start))
-			err = -EFAULT;
-	}
-	return err;
-}
-
 struct  fbcmap32 {
 	int             index;          /* first element (0 origin) */
 	int             count;
@@ -1574,7 +1546,6 @@ COMPATIBLE_IOCTL(DM_TARGET_STATUS)
 COMPATIBLE_IOCTL(DM_TARGET_WAIT)
 #endif
 /* And these ioctls need translation */
-HANDLE_IOCTL(HDIO_GETGEO_BIG_RAW, hdio_getgeo_big)
 /* NCPFS */
 HANDLE_IOCTL(NCP_IOC_NCPREQUEST_32, do_ncp_ncprequest)
 HANDLE_IOCTL(NCP_IOC_GETMOUNTUID2_32, do_ncp_getmountuid2)

drivers/ide/ide.c

@@ -1619,18 +1619,6 @@ int generic_ide_ioctl(struct block_device *bdev, unsigned int cmd,
 			return 0;
 		}
 
-		case HDIO_GETGEO_BIG_RAW:
-		{
-			struct hd_big_geometry *loc = (struct hd_big_geometry *) arg;
-			if (!loc || (drive->media != ide_disk && drive->media != ide_floppy)) return -EINVAL;
-			if (put_user(drive->head, (u8 *) &loc->heads)) return -EFAULT;
-			if (put_user(drive->sect, (u8 *) &loc->sectors)) return -EFAULT;
-			if (put_user(drive->cyl, (unsigned int *) &loc->cylinders)) return -EFAULT;
-			if (put_user((unsigned)get_start_sect(bdev),
-				(unsigned long *) &loc->start)) return -EFAULT;
-			return 0;
-		}
-
 		case HDIO_OBSOLETE_IDENTITY:
 		case HDIO_GET_IDENTITY:
 			if (bdev != bdev->bd_contains)

include/linux/hdreg.h

@@ -395,14 +395,6 @@ struct hd_geometry {
       unsigned long start;
 };
 
-/* BIG GEOMETRY - dying, used only by HDIO_GETGEO_BIG_RAW */
-struct hd_big_geometry {
-	unsigned char heads;
-	unsigned char sectors;
-	unsigned int cylinders;
-	unsigned long start;
-};
-
 /* hd/ide ctl's that pass (arg) ptrs to user space are numbered 0x030n/0x031n */
 #define HDIO_GETGEO		0x0301	/* get device geometry */
 #define HDIO_GET_UNMASKINTR	0x0302	/* get current unmask setting */
@@ -456,7 +448,7 @@ enum {
 
 /* hd/ide ctl's that pass (arg) ptrs to user space are numbered 0x033n/0x033n */
 /* 0x330 is reserved - used to be HDIO_GETGEO_BIG */
-#define HDIO_GETGEO_BIG_RAW	0x0331	/* */
+/* 0x331 is reserved - used to be HDIO_GETGEO_BIG_RAW */
 
 #define HDIO_SET_IDE_SCSI      0x0338
 #define HDIO_SET_SCSI_IDE      0x0339