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authorDave Barach <dave@barachs.net>2019-07-23 16:28:36 -0400
committerDave Barach <dave@barachs.net>2019-07-24 08:14:39 -0400
commitb71b5ffbfb2ddbad408a22ef17046dfe5fea1cad (patch)
tree73490766e73d335ae722f45c89b092cfcd707b34 /src/vnet/interface_funcs.h
parent9fb50d83dbe22cab30532cec8c85e711af1f82ff (diff)
api: binary api cleanup
Multiple API message handlers call vnet_get_sup_hw_interface(...) without checking the inbound sw_if_index. This can cause a pool_elt_at_index ASSERT in a debug image, and major disorder in a production image. Given that a number of places are coded as follows, add an "api_visible_or_null" variant of vnet_get_sup_hw_interface, which returns NULL given an invalid sw_if_index, or a hidden sw interface: - hw = vnet_get_sup_hw_interface (vnm, sw_if_index); + hw = vnet_get_sup_hw_interface_api_visible_or_null (vnm, sw_if_index); if (hw == NULL || memif_device_class.index != hw->dev_class_index) return clib_error_return (0, "not a memif interface"); Rename two existing xxx_safe functions -> xxx_or_null to make it obvious what they return. Type: fix Change-Id: I29996e8d0768fd9e0c5495bd91ff8bedcf2c5697 Signed-off-by: Dave Barach <dave@barachs.net> (cherry picked from commit 3940de36728b768574a3e998389bb90d55f690d1)
Diffstat (limited to 'src/vnet/interface_funcs.h')
-rw-r--r--src/vnet/interface_funcs.h20
1 files changed, 18 insertions, 2 deletions
diff --git a/src/vnet/interface_funcs.h b/src/vnet/interface_funcs.h
index b862f48ef36..18a1065201b 100644
--- a/src/vnet/interface_funcs.h
+++ b/src/vnet/interface_funcs.h
@@ -47,7 +47,7 @@ vnet_get_hw_interface (vnet_main_t * vnm, u32 hw_if_index)
}
always_inline vnet_hw_interface_t *
-vnet_get_hw_interface_safe (vnet_main_t * vnm, u32 hw_if_index)
+vnet_get_hw_interface_or_null (vnet_main_t * vnm, u32 hw_if_index)
{
if (!pool_is_free_index (vnm->interface_main.hw_interfaces, hw_if_index))
return pool_elt_at_index (vnm->interface_main.hw_interfaces, hw_if_index);
@@ -61,7 +61,7 @@ vnet_get_sw_interface (vnet_main_t * vnm, u32 sw_if_index)
}
always_inline vnet_sw_interface_t *
-vnet_get_sw_interface_safe (vnet_main_t * vnm, u32 sw_if_index)
+vnet_get_sw_interface_or_null (vnet_main_t * vnm, u32 sw_if_index)
{
if (!pool_is_free_index (vnm->interface_main.sw_interfaces, sw_if_index))
return pool_elt_at_index (vnm->interface_main.sw_interfaces, sw_if_index);
@@ -97,6 +97,22 @@ vnet_get_sup_hw_interface (vnet_main_t * vnm, u32 sw_if_index)
return vnet_get_hw_interface (vnm, sw->hw_if_index);
}
+always_inline vnet_hw_interface_t *
+vnet_get_sup_hw_interface_api_visible_or_null (vnet_main_t * vnm,
+ u32 sw_if_index)
+{
+ vnet_sw_interface_t *si;
+ if (PREDICT_FALSE (pool_is_free_index (vnm->interface_main.sw_interfaces,
+ sw_if_index)))
+ return NULL;
+ si = vnet_get_sup_sw_interface (vnm, sw_if_index);
+ if (PREDICT_FALSE (si->flags & VNET_SW_INTERFACE_FLAG_HIDDEN))
+ return NULL;
+ ASSERT ((si->type == VNET_SW_INTERFACE_TYPE_HARDWARE) ||
+ (si->type == VNET_SW_INTERFACE_TYPE_PIPE));
+ return vnet_get_hw_interface (vnm, si->hw_if_index);
+}
+
always_inline vnet_hw_interface_class_t *
vnet_get_hw_interface_class (vnet_main_t * vnm, u32 hw_class_index)
{