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MXS-2011 Immediately validate the connection name

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And convert it to an index. This is subsequently needed when
connections configs can be updated and not just added.
This commit is contained in:
Johan Wikman 2018-09-03 12:45:37 +03:00
parent 4789f3f193
commit 9c06a60b48
1 changed files with 25 additions and 19 deletions
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44
server/modules/routing/binlogrouter/blr_slave.cc
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@ -4235,16 +4235,28 @@ bool ChangeMasterOptions::validate(ROUTER_INSTANCE* router,
namespace
{
bool validate_connection_name(ROUTER_INSTANCE* router, const std::string& name, char* error)
int validate_connection_name(ROUTER_INSTANCE* router, const std::string& name, char* error)
{
static const char DEFAULT_MESSAGE[] =
"If a connection name is provided, it must be of the format ':N' where N "
"is an integer larger than 1.";
int index = -1;
char custom_message[BINLOG_ERROR_MSG_LEN + 1];
const char* message = DEFAULT_MESSAGE;
if (name.length() >= 2) // At minimum ":N".
if (name.length() == 0)
{
index = 0;
message = nullptr;
}
else if (name.length() == 1)
{
// We are fine with 'index' == -1, and the message being the default message.
}
else // name.length() >= 2.
{
if (name.front() == ':')
{
@ -4255,6 +4267,7 @@ bool validate_connection_name(ROUTER_INSTANCE* router, const std::string& name,
{
if (router->configs.size() == static_cast<size_t>(n - 1))
{
index = n - 1;
message = nullptr;
}
else if (router->configs.size() == 0)
@ -4289,7 +4302,7 @@ bool validate_connection_name(ROUTER_INSTANCE* router, const std::string& name,
snprintf(error, BINLOG_ERROR_MSG_LEN, "%s", message);
}
return message == nullptr;
return index;
}
}
@ -4405,21 +4418,6 @@ int blr_apply_change_master_0(ROUTER_INSTANCE* router,
return change_binlog;
}
int blr_apply_change_master_N(ROUTER_INSTANCE* router,
const ChangeMasterConfig& new_config,
char* error)
{
int rc = -1;
if (validate_connection_name(router, new_config.connection_name, error))
{
router->configs.push_back(new_config);
rc = 0;
}
return rc;
}
}
static int blr_apply_change_master(ROUTER_INSTANCE* router,
@ -4440,7 +4438,7 @@ static int blr_apply_change_master(ROUTER_INSTANCE* router,
}
else
{
rc = blr_apply_change_master_N(router, new_config, error);
router->configs.push_back(new_config);
}
spinlock_release(&router->lock);
@ -4532,6 +4530,14 @@ int blr_handle_change_master(ROUTER_INSTANCE* router,
return -1;
}
int index = validate_connection_name(router, connection_name, error);
if (index == -1)
{
// An error was already generated.
return -1;
}
std::vector<char> cmd_string(command, command + strlen(command) + 1); // Include the NULL
/* Parse SQL command and populate the change_master struct */