[PATCH 1/1] cxgb3i: Fix a login over vlan issue

Rakesh Ranjan
2009-12-04T11:04:25Z

Fix a login over vlan issue, when parent interface is vlan and we are using cxgb3i sepecific
private ip address in '/etc/iscsi/ifaces/' iface file.

Acked-by: Karen Xie <kxie-ut6Up61K2wZBDgjK7y7TUQ@public.gmane.org>
Signed-off-by: Rakesh Ranjan <rakesh-ut6Up61K2wZBDgjK7y7TUQ@public.gmane.org>
---
drivers/scsi/cxgb3i/cxgb3i_offload.c | 34 +++++++++++++++++++++++++++++++++-
1 files changed, 33 insertions(+), 1 deletions(-)

diff --git a/drivers/scsi/cxgb3i/cxgb3i_offload.c b/drivers/scsi/cxgb3i/cxgb3i_offload.c
index c1d5be4..66d52e4 100644
--- a/drivers/scsi/cxgb3i/cxgb3i_offload.c
+++ b/drivers/scsi/cxgb3i/cxgb3i_offload.c
@@ -1440,6 +1440,10 @@ void cxgb3i_c3cn_release(struct s3_conn *c3cn)
static int is_cxgb3_dev(struct net_device *dev)
{
struct cxgb3i_sdev_data *cdata;
+ struct net_device *ndev = dev;
+
+ if (dev->priv_flags & IFF_802_1Q_VLAN)
+ ndev = vlan_dev_real_dev(dev);

write_lock(&cdata_rwlock);
list_for_each_entry(cdata, &cdata_list, list) {
@@ -1447,7 +1451,7 @@ static int is_cxgb3_dev(struct net_device *dev)
int i;

for (i = 0; i < ports->nports; i++)
- if (dev == ports->lldevs[i]) {
+ if (ndev == ports->lldevs[i]) {
write_unlock(&cdata_rwlock);
return 1;
}
@@ -1566,6 +1570,26 @@ out_err:
return -1;
}

+/**
+ * cxgb3i_find_dev - find the interface associated with the given address
+ * @ipaddr: ip address
+ */
+static struct net_device *
+cxgb3i_find_dev(__be32 ipaddr)
+{
+ struct flowi fl;
+ int err;
+ struct rtable *rt;
+
+ memset(&fl, 0, sizeof(fl));
+ fl.nl_u.ip4_u.daddr = ipaddr;
+
+ err = ip_route_output_key(&init_net, &rt, &fl);
+ if (!err)
+ return (&rt->u.dst)->dev;
+
+ return NULL;
+}

/**
* cxgb3i_c3cn_connect - initiates an iscsi tcp connection to a given address
@@ -1581,6 +1605,7 @@ int cxgb3i_c3cn_connect(struct net_device *dev, struct s3_conn *c3cn,
struct cxgb3i_sdev_data *cdata;
struct t3cdev *cdev;
__be32 sipv4;
+ struct net_device *dstdev;
int err;

c3cn_conn_debug("c3cn 0x%p, dev 0x%p.\n", c3cn, dev);
@@ -1591,6 +1616,13 @@ int cxgb3i_c3cn_connect(struct net_device *dev, struct s3_conn *c3cn,
c3cn->daddr.sin_port = usin->sin_port;
c3cn->daddr.sin_addr.s_addr = usin->sin_addr.s_addr;

+ dstdev = cxgb3i_find_dev(usin->sin_addr.s_addr);
+ if (!dstdev || !is_cxgb3_dev(dstdev))
+ return -ENETUNREACH;
+
+ if (dstdev->priv_flags & IFF_802_1Q_VLAN)
+ dev = dstdev;
+
rt = find_route(dev, c3cn->saddr.sin_addr.s_addr,
c3cn->daddr.sin_addr.s_addr,
c3cn->saddr.sin_port,
--
1.6.0.6

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