+struct compat_blk_user_trace_setup {
+ char name[32];
+ u16 act_mask;
+ u32 buf_size;
+ u32 buf_nr;
+ compat_u64 start_lba;
+ compat_u64 end_lba;
+ u32 pid;
+};
+#define BLKTRACESETUP32 _IOWR(0x12, 115, struct compat_blk_user_trace_setup)
+
+static int compat_blk_trace_setup(struct block_device *bdev, char __user *arg)
+{
+ struct blk_user_trace_setup buts;
+ struct compat_blk_user_trace_setup cbuts;
+ struct request_queue *q;
+ int ret;
+
+ q = bdev_get_queue(bdev);
+ if (!q)
+ return -ENXIO;
+
+ if (copy_from_user(&cbuts, arg, sizeof(cbuts)))
+ return -EFAULT;
+
+ buts = (struct blk_user_trace_setup) {
+ .act_mask = cbuts.act_mask,
+ .buf_size = cbuts.buf_size,
+ .buf_nr = cbuts.buf_nr,
+ .start_lba = cbuts.start_lba,
+ .end_lba = cbuts.end_lba,
+ .pid = cbuts.pid,
+ };
+ memcpy(&buts.name, &cbuts.name, 32);
+
+ mutex_lock(&bdev->bd_mutex);
+ ret = do_blk_trace_setup(q, bdev, &buts);
+ mutex_unlock(&bdev->bd_mutex);
+ if (ret)
+ return ret;
+
+ if (copy_to_user(arg, &buts.name, 32))
+ return -EFAULT;
+
+ return 0;
+}
+