Add in support for older style extended query device.
Signed-off-by: Kanoj Sarcar <[email protected]>
---
kern/drivers/net/udrvr/compat.c | 32 ++++++++++++++++++++++++++++++++
1 file changed, 32 insertions(+)
diff --git a/kern/drivers/net/udrvr/compat.c b/kern/drivers/net/udrvr/compat.c
index 6ec029b..75b286d 100644
--- a/kern/drivers/net/udrvr/compat.c
+++ b/kern/drivers/net/udrvr/compat.c
@@ -618,6 +618,36 @@ static ssize_t compat(struct ib_uverbs_file *file, size_t
count,
}
/*
+ * Request structure is:
+ * ib_uverbs_cmd_hdr :: (almost) ib_uverbs_ex_cmd_hdr_compat.
+ * Response structure is:
+ * 8B comp_mask :: ib_uverbs_query_device_resp :: 8B timestamp_mask ::
+ * 8B hca_core_clock
+ */
+static ssize_t compat_query(struct ib_uverbs_file *file, size_t count,
+ const char __user *buf)
+{
+ unsigned long tmpbuf[17], tval = 0;
+ struct ib_uverbs_cmd_hdr *p = (struct ib_uverbs_cmd_hdr *)tmpbuf;
+ char __user *dst = (char __user *)buf;
+ int insz, outsz;
+
+ if (copy_from_user(tmpbuf, buf, count))
+ return -EFAULT;
+ insz = p->in_words * 4;
+ outsz = p->out_words * 4;
+
+ /* Zero out expected comp_mask field in response */
+ copy_to_user((void *)tmpbuf[3], &tval, 8);
+ /* Kernel writes out after expected comp_mask field */
+ tmpbuf[3] += 8;
+ /* Move "response" upwards to "buf" */
+ copy_to_user(dst, &tmpbuf[3], sizeof(struct ib_uverbs_query_device));
+
+ return ib_uverbs_query_device(file, buf, insz, outsz);
+}
+
+/*
* Compat hack for applications/libraries we care about. Retrofit Linux 3.12
* style APIs.
*/
@@ -635,6 +665,8 @@ ssize_t check_old_abi(struct file *filp, const char __user
*buf, size_t count)
return compat_ex(file, count, buf);
} else if (tmp == IB_USER_VERBS_CMD_MODIFY_QP) {
return compat(file, count, buf);
+ } else if (tmp == 56) {
+ return compat_query(file, count, buf);
} else if (tmp == IB_USER_VERBS_CMD_QUERY_QP) {
panic("query_qp API difference not handled\n");
}
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