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mysql_client.c:gw_error_client_event & gw_client_hangup_event: added session state check, if session is already closing, don't start redundant call to dcb_close.

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mysql_common.c:mysql_protocol_done: added protocol state check. Used not to check it which caused double free of allocated memory.
This commit is contained in:
VilhoRaatikka 2014-08-14 15:15:22 +03:00
parent d3a79ce7c4
commit 77e5525436
5 changed files with 36 additions and 17 deletions
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7
server/core/dcb.c
View File

@ -978,9 +978,10 @@ int below_water;
}
if (dolog)
{
LOGIF(LE, (skygw_log_write_flush(
LOGFILE_ERROR,
"Error : Writing to %s socket failed due %d, %s.",
LOGIF(LD, (skygw_log_write(
LOGFILE_DEBUG,
"%lu [dcb_write] Writing to %s socket failed due %d, %s.",
pthread_self(),
dcb_isclient(dcb) ? "client" : "backend server",
saved_errno,
strerror(saved_errno))));

25
server/modules/protocol/mysql_backend.c
View File

@ -777,11 +777,6 @@ static int gw_error_backend_event(DCB *dcb)
router = session->service->router;
router_instance = session->service->router_instance;
#if defined(SS_DEBUG)
LOGIF(LE, (skygw_log_write_flush(
LOGFILE_ERROR,
"Backend error event handling.")));
#endif
/**
* Avoid running redundant error handling procedure.
* dcb_close is already called for the DCB. Thus, either connection is
@ -820,6 +815,11 @@ static int gw_error_backend_event(DCB *dcb)
goto retblock;
}
#if defined(SS_DEBUG)
LOGIF(LE, (skygw_log_write_flush(
LOGFILE_ERROR,
"Backend error event handling.")));
#endif
router->handleError(router_instance,
rsession,
errbuf,
@ -963,14 +963,7 @@ gw_backend_hangup(DCB *dcb)
rsession = session->router_session;
router = session->service->router;
router_instance = session->service->router_instance;
#if defined(SS_DEBUG)
LOGIF(LE, (skygw_log_write_flush(
LOGFILE_ERROR,
"Backend hangup error handling.")));
#endif
router_instance = session->service->router_instance;
errbuf = mysql_create_custom_error(
1,
@ -999,6 +992,12 @@ gw_backend_hangup(DCB *dcb)
gwbuf_free(errbuf);
goto retblock;
}
#if defined(SS_DEBUG)
LOGIF(LE, (skygw_log_write_flush(
LOGFILE_ERROR,
"Backend hangup error handling.")));
#endif
router->handleError(router_instance,
rsession,
errbuf,

14
server/modules/protocol/mysql_client.c
View File

@ -1300,12 +1300,19 @@ static int gw_error_client_event(
STRDCBSTATE(dcb->state),
(session != NULL ? session : NULL))));
if (session != NULL && session->state == SESSION_STATE_STOPPING)
{
goto retblock;
}
#if defined(SS_DEBUG)
LOGIF(LE, (skygw_log_write_flush(
LOGFILE_ERROR,
"Client error event handling.")));
#endif
dcb_close(dcb);
retblock:
return 1;
}
@ -1380,12 +1387,19 @@ gw_client_hangup_event(DCB *dcb)
{
CHK_SESSION(session);
}
if (session != NULL && session->state == SESSION_STATE_STOPPING)
{
goto retblock;
}
#if defined(SS_DEBUG)
LOGIF(LE, (skygw_log_write_flush(
LOGFILE_ERROR,
"Client hangup error handling.")));
#endif
dcb_close(dcb);
retblock:
return 1;
}

5
server/modules/protocol/mysql_common.c
View File

@ -117,6 +117,10 @@ void mysql_protocol_done (
spinlock_acquire(&p->protocol_lock);
if (p->protocol_state != MYSQL_PROTOCOL_ACTIVE)
{
goto retblock;
}
scmd = p->protocol_cmd_history;
while (scmd != NULL)
@ -127,6 +131,7 @@ void mysql_protocol_done (
}
p->protocol_state = MYSQL_PROTOCOL_DONE;
retblock:
spinlock_release(&p->protocol_lock);
}

2
server/modules/routing/readwritesplit/readwritesplit.c
View File

@ -1548,7 +1548,7 @@ static void clientReply (
(uint8_t *)GWBUF_DATA((scur->scmd_cur_cmd->my_sescmd_buf));
size_t len = MYSQL_GET_PACKET_LEN(buf);
char* cmdstr = (char *)malloc(len+1);
/** data+termination character == len */
snprintf(cmdstr, len, "%s", &buf[5]);
LOGIF(LE, (skygw_log_write_flush(