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iscsi-target: Fix early login failure statistics misses 

Due to the long standing checks in iscsit_snmp_get_tiqn()
that assume conn->sess->tpg dereference of tpg->tpg_tiqn
for iscsit_collect_login_stats() usage, some of the early
login failure cases like ISCSI_LOGIN_STATUS_TGT_FORBIDDEN
where not getting incremented, due to sess->tpg assignment
happening later in iscsi_login_zero_tsih_s2().

Instead, use the earlier conn->tpg assignment done by
iscsi_target_locate_portal() -> iscsit_get_tpg_from_np()
so the existing counters are incremented correctly for
the various early login failure cases.

Also, go ahead and drop the old rate limiting check in
iscsit_collect_login_stats(), so we get the true number
of failed login attempts in the existing statistics.

Reported-by: Ryan Stiles <ras@datera.io>
Cc: Ryan Stiles <ras@datera.io>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Nicholas Bellinger 2017-02-23 21:26:31 -08:00
parent bd4e2d2907
commit 17c61ad66f
1 changed files with 2 additions and 36 deletions
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38
drivers/target/iscsi/iscsi_target_util.c
View File

@ -1378,33 +1378,6 @@ int tx_data(
return iscsit_do_tx_data(conn, &c);
}
static bool sockaddr_equal(struct sockaddr_storage *x, struct sockaddr_storage *y)
{
switch (x->ss_family) {
case AF_INET: {
struct sockaddr_in *sinx = (struct sockaddr_in *)x;
struct sockaddr_in *siny = (struct sockaddr_in *)y;
if (sinx->sin_addr.s_addr != siny->sin_addr.s_addr)
return false;
if (sinx->sin_port != siny->sin_port)
return false;
break;
}
case AF_INET6: {
struct sockaddr_in6 *sinx = (struct sockaddr_in6 *)x;
struct sockaddr_in6 *siny = (struct sockaddr_in6 *)y;
if (!ipv6_addr_equal(&sinx->sin6_addr, &siny->sin6_addr))
return false;
if (sinx->sin6_port != siny->sin6_port)
return false;
break;
}
default:
return false;
}
return true;
}
void iscsit_collect_login_stats(
struct iscsi_conn *conn,
u8 status_class,
@ -1421,13 +1394,6 @@ void iscsit_collect_login_stats(
ls = &tiqn->login_stats;
spin_lock(&ls->lock);
if (sockaddr_equal(&conn->login_sockaddr, &ls->last_intr_fail_sockaddr) &&
((get_jiffies_64() - ls->last_fail_time) < 10)) {
/* We already have the failure info for this login */
spin_unlock(&ls->lock);
return;
}
if (status_class == ISCSI_STATUS_CLS_SUCCESS)
ls->accepts++;
else if (status_class == ISCSI_STATUS_CLS_REDIRECT) {
@ -1472,10 +1438,10 @@ struct iscsi_tiqn *iscsit_snmp_get_tiqn(struct iscsi_conn *conn)
{
struct iscsi_portal_group *tpg;
if (!conn || !conn->sess)
if (!conn)
return NULL;
tpg = conn->sess->tpg;
tpg = conn->tpg;
if (!tpg)
return NULL;