diff options
| author | Eugene Crosser <Eugene.Crosser@ru.ibm.com> | 2015-05-18 12:27:57 (GMT) |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-05-18 16:14:17 (GMT) |
| commit | ff1d929110424cd432955e3d1e005442179192b8 (patch) | |
| tree | ffb329c4d3263287b2228c85becd01499d820075 | |
| parent | 9c23f4dab1a467f41a27c7d7b87a987c5a3cfc2d (diff) | |
| download | linux-ff1d929110424cd432955e3d1e005442179192b8.tar.xz | |
qeth: BRIDGEPORT "sanity check"
Forbid enabling IFF_PROMISC reflection to BRIDGEPORT when a role
is already assigned, and forbid direct manipulation of the role
when reflection mode is engaged.
Reviewed-by: Thomas Richter <tmricht@linux.vnet.ibm.com>
Signed-off-by: Eugene Crosser <Eugene.Crosser@ru.ibm.com>
Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/s390/net/qeth_l2_sys.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/drivers/s390/net/qeth_l2_sys.c b/drivers/s390/net/qeth_l2_sys.c index a553fba..52673cd 100644 --- a/drivers/s390/net/qeth_l2_sys.c +++ b/drivers/s390/net/qeth_l2_sys.c @@ -86,7 +86,9 @@ static ssize_t qeth_bridge_port_role_store(struct device *dev, mutex_lock(&card->conf_mutex); - if (qeth_card_hw_is_reachable(card)) { + if (card->options.sbp.reflect_promisc) /* Forbid direct manipulation */ + rc = -EPERM; + else if (qeth_card_hw_is_reachable(card)) { rc = qeth_bridgeport_setrole(card, role); if (!rc) card->options.sbp.role = role; @@ -184,6 +186,7 @@ static ssize_t qeth_bridgeport_reflect_store(struct device *dev, { struct qeth_card *card = dev_get_drvdata(dev); int enable, primary; + int rc = 0; if (!card) return -EINVAL; @@ -202,12 +205,17 @@ static ssize_t qeth_bridgeport_reflect_store(struct device *dev, mutex_lock(&card->conf_mutex); - card->options.sbp.reflect_promisc = enable; - card->options.sbp.reflect_promisc_primary = primary; + if (card->options.sbp.role != QETH_SBP_ROLE_NONE) + rc = -EPERM; + else { + card->options.sbp.reflect_promisc = enable; + card->options.sbp.reflect_promisc_primary = primary; + rc = 0; + } mutex_unlock(&card->conf_mutex); - return count; + return rc ? rc : count; } static DEVICE_ATTR(bridge_reflect_promisc, 0644, |