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client->data is copied to session->data already in session_alloc to ensure that authentication information is set when background connection is started to establish in concurrent thread.

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vraatikka
2013-08-28 23:06:09 +03:00
parent 786468fc5d
commit 9a8e271417
2 changed files with 59 additions and 15 deletions
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49
server/core/session.c
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@ -31,12 +31,16 @@
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <session.h>
#include <service.h>
#include <router.h>
#include <dcb.h>
#include <spinlock.h>
#include <atomic.h>
#include <skygw_utils.h>
#include <log_manager.h>
static SPINLOCK session_spin = SPINLOCK_INIT;
static SESSION *allSessions = NULL;
@ -55,18 +59,40 @@ static SESSION *allSessions = NULL;
SESSION *
session_alloc(SERVICE *service, DCB *client)
{
SESSION *session;
SESSION *session;
if ((session = (SESSION *)malloc(sizeof(SESSION))) == NULL)
session = (SESSION *)calloc(1, sizeof(SESSION));
if (session == NULL) {
int eno = errno;
errno = 0;
skygw_log_write_flush(
LOGFILE_ERROR,
"%lu [session_alloc] Allocating memory for session "
"object failed. Errno %d, %s.",
pthread_self(),
eno,
strerror(eno));
return NULL;
}
session->ses_chk_top = CHK_NUM_SESSION;
session->ses_chk_tail = CHK_NUM_SESSION;
spinlock_init(&session->ses_lock);
session->service = service;
/**
* Prevent backend threads from accessing before session is completely
* initialized.
*/
spinlock_acquire(&session->ses_lock);
session->service = service;
session->client = client;
memset(&session->stats, 0, sizeof(SESSION_STATS));
session->stats.connect = time(0);
session->state = SESSION_STATE_ALLOC;
/**
* If client has data pointer to authentication info, set it to session.
*/
session->data = client->data;
client->session = session;
/*
* Only create a router session if we are not the listening
* DCB. Creating a router session may create a connection to a
@ -75,17 +101,22 @@ SESSION *session;
*/
if (client->state != DCB_STATE_LISTENING)
{
session->router_session = service->router->newSession(service->router_instance, session);
session->router_session =
service->router->newSession(service->router_instance, session);
}
spinlock_acquire(&session_spin);
session->next = allSessions;
allSessions = session;
spinlock_release(&session_spin);
/** This indicates that session is ready to be shared with backend DCBs. */
session->state = SESSION_STATE_READY;
/** Release session lock */
spinlock_release(&session->ses_lock);
atomic_add(&service->stats.n_sessions, 1);
atomic_add(&service->stats.n_current, 1);
CHK_SESSION(session);
return session;
}
@ -98,8 +129,9 @@ void
session_free(SESSION *session)
{
SESSION *ptr;
CHK_SESSION(session);
/* First of all remove from the linked list */
spinlock_acquire(&session_spin);
if (allSessions == session)
{
@ -117,7 +149,6 @@ SESSION *ptr;
}
spinlock_release(&session_spin);
atomic_add(&session->service->stats.n_current, -1);
/* Clean up session and free the memory */
free(session);
}