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[BFD]Retry create BFD with different source UDP port on failure #2225

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merged 5 commits into from
Apr 7, 2022
Merged

[BFD]Retry create BFD with different source UDP port on failure #2225

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54cda1e
[BFD]Retry create BFD with different source UDP port on failure
dgsudharsan Apr 5, 2022
31ca179
Addressing code review comments
dgsudharsan Apr 6, 2022
0741287
Changing log level to warn
dgsudharsan Apr 6, 2022
a0b80e4
Fixing build issue
dgsudharsan Apr 6, 2022
f29c5db
Addressing code review comments
dgsudharsan Apr 7, 2022
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40 changes: 40 additions & 0 deletions orchagent/bfdorch.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,7 @@ using namespace swss;
#define BFD_SESSION_MILLISECOND_TO_MICROSECOND 1000
#define BFD_SRCPORTINIT 49152
#define BFD_SRCPORTMAX 65536
#define NUM_BFD_SRCPORT_RETRIES 3

extern sai_bfd_api_t* sai_bfd_api;
extern sai_object_id_t gSwitchId;
Expand Down Expand Up @@ -416,6 +417,12 @@ bool BfdOrch::create_bfd_session(const string& key, const vector<FieldValueTuple

sai_object_id_t bfd_session_id = SAI_NULL_OBJECT_ID;
sai_status_t status = sai_bfd_api->create_bfd_session(&bfd_session_id, gSwitchId, (uint32_t)attrs.size(), attrs.data());

if (status != SAI_STATUS_SUCCESS)
{
status = retry_create_bfd_session(bfd_session_id, attrs);
}

if (status != SAI_STATUS_SUCCESS)
{
SWSS_LOG_ERROR("Failed to create bfd session %s, rv:%d", key.c_str(), status);
Expand All @@ -439,6 +446,38 @@ bool BfdOrch::create_bfd_session(const string& key, const vector<FieldValueTuple
return true;
}

void BfdOrch::update_port_number(vector<sai_attribute_t> &attrs)
{
for (uint32_t attr_idx = 0; attr_idx < (uint32_t)attrs.size(); attr_idx++)
{
if (attrs[attr_idx].id == SAI_BFD_SESSION_ATTR_UDP_SRC_PORT)
{
auto old_num = attrs[attr_idx].value.u32;
attrs[attr_idx].value.u32 = bfd_src_port();
SWSS_LOG_WARN("BFD create using port number %d failed. Retrying with port number %d",
old_num, attrs[attr_idx].value.u32);
return;
}
}
}

sai_status_t BfdOrch::retry_create_bfd_session(sai_object_id_t &bfd_session_id, vector<sai_attribute_t> attrs)
{
sai_status_t status = SAI_STATUS_FAILURE;

for (int retry = 0; retry < NUM_BFD_SRCPORT_RETRIES; retry++)
{
update_port_number(attrs);
status = sai_bfd_api->create_bfd_session(&bfd_session_id, gSwitchId,
(uint32_t)attrs.size(), attrs.data());
if (status == SAI_STATUS_SUCCESS)
{
return status;
}
}
return status;
}

bool BfdOrch::remove_bfd_session(const string& key)
{
if (bfd_session_map.find(key) == bfd_session_map.end())
Expand Down Expand Up @@ -487,3 +526,4 @@ uint32_t BfdOrch::bfd_src_port(void)

return (port++);
}

2 changes: 2 additions & 0 deletions orchagent/bfdorch.h
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Original file line number Diff line number Diff line change
Expand Up @@ -27,6 +27,8 @@ class BfdOrch: public Orch, public Subject
uint32_t bfd_src_port(void);

bool register_bfd_state_change_notification(void);
void update_port_number(std::vector<sai_attribute_t> &attrs);
sai_status_t retry_create_bfd_session(sai_object_id_t &bfd_session_id, vector<sai_attribute_t> attrs);

std::map<std::string, sai_object_id_t> bfd_session_map;
std::map<sai_object_id_t, BfdUpdate> bfd_session_lookup;
Expand Down