be2net: Prevent VFs from enabling VLAN promiscuous mode

Currently, a PF does not restrict its VF interface from enabling vlan
promiscuous mode. This breaks vlan isolation when a vlan
(transparent tagging) is configured on a VF.

This patch fixes this problem by disabling the vlan promisc capability
for VFs.

Reported-by: Yoann Juet <veilletechno-irts@univ-nantes.fr>
Signed-off-by: Vasundhara Volam <vasundhara.volam@emulex.com>
Signed-off-by: Sathya Perla <sathya.perla@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/emulex/benet/be.h b/drivers/net/ethernet/emulex/benet/be.h
index 27de37a..92eb0c8 100644 (file)
--- a/drivers/net/ethernet/emulex/benet/be.h
+++ b/drivers/net/ethernet/emulex/benet/be.h
@@ -354,6 +354,7 @@ struct be_vf_cfg {
        u16 vlan_tag;
        u32 tx_rate;
        u32 plink_tracking;
+       u32 privileges;
 };
 
 enum vf_state {

diff --git a/drivers/net/ethernet/emulex/benet/be_cmds.c b/drivers/net/ethernet/emulex/benet/be_cmds.c
index 36916cf..3e894f4 100644 (file)
--- a/drivers/net/ethernet/emulex/benet/be_cmds.c
+++ b/drivers/net/ethernet/emulex/benet/be_cmds.c
@@ -1918,7 +1918,7 @@ int be_cmd_modify_eqd(struct be_adapter *adapter, struct be_set_eqd *set_eqd,
 
 /* Uses sycnhronous mcc */
 int be_cmd_vlan_config(struct be_adapter *adapter, u32 if_id, u16 *vtag_array,
-                      u32 num)
+                      u32 num, u32 domain)
 {
        struct be_mcc_wrb *wrb;
        struct be_cmd_req_vlan_config *req;
@@ -1936,6 +1936,7 @@ int be_cmd_vlan_config(struct be_adapter *adapter, u32 if_id, u16 *vtag_array,
        be_wrb_cmd_hdr_prepare(&req->hdr, CMD_SUBSYSTEM_COMMON,
                               OPCODE_COMMON_NTWK_VLAN_CONFIG, sizeof(*req),
                               wrb, NULL);
+       req->hdr.domain = domain;
 
        req->interface_id = if_id;
        req->untagged = BE_IF_FLAGS_UNTAGGED & be_if_cap_flags(adapter) ? 1 : 0;

diff --git a/drivers/net/ethernet/emulex/benet/be_cmds.h b/drivers/net/ethernet/emulex/benet/be_cmds.h
index db761e8..a7634a3 100644 (file)
--- a/drivers/net/ethernet/emulex/benet/be_cmds.h
+++ b/drivers/net/ethernet/emulex/benet/be_cmds.h
@@ -2256,7 +2256,7 @@ int lancer_cmd_get_pport_stats(struct be_adapter *adapter,
 int be_cmd_get_fw_ver(struct be_adapter *adapter);
 int be_cmd_modify_eqd(struct be_adapter *adapter, struct be_set_eqd *, int num);
 int be_cmd_vlan_config(struct be_adapter *adapter, u32 if_id, u16 *vtag_array,
-                      u32 num);
+                      u32 num, u32 domain);
 int be_cmd_rx_filter(struct be_adapter *adapter, u32 flags, u32 status);
 int be_cmd_set_flow_control(struct be_adapter *adapter, u32 tx_fc, u32 rx_fc);
 int be_cmd_get_flow_control(struct be_adapter *adapter, u32 *tx_fc, u32 *rx_fc);

diff --git a/drivers/net/ethernet/emulex/benet/be_main.c b/drivers/net/ethernet/emulex/benet/be_main.c
index 0a81685..eb2bed9 100644 (file)
--- a/drivers/net/ethernet/emulex/benet/be_main.c
+++ b/drivers/net/ethernet/emulex/benet/be_main.c
@@ -1171,7 +1171,7 @@ static int be_vid_config(struct be_adapter *adapter)
        for_each_set_bit(i, adapter->vids, VLAN_N_VID)
                vids[num++] = cpu_to_le16(i);
 
-       status = be_cmd_vlan_config(adapter, adapter->if_handle, vids, num);
+       status = be_cmd_vlan_config(adapter, adapter->if_handle, vids, num, 0);
        if (status) {
                dev_err(dev, "Setting HW VLAN filtering failed\n");
                /* Set to VLAN promisc mode as setting VLAN filter failed */
@@ -1380,11 +1380,67 @@ static int be_get_vf_config(struct net_device *netdev, int vf,
        return 0;
 }
 
+static int be_set_vf_tvt(struct be_adapter *adapter, int vf, u16 vlan)
+{
+       struct be_vf_cfg *vf_cfg = &adapter->vf_cfg[vf];
+       u16 vids[BE_NUM_VLANS_SUPPORTED];
+       int vf_if_id = vf_cfg->if_handle;
+       int status;
+
+       /* Enable Transparent VLAN Tagging */
+       status = be_cmd_set_hsw_config(adapter, vlan, vf + 1, vf_if_id, 0);
+       if (status)
+               return status;
+
+       /* Clear pre-programmed VLAN filters on VF if any, if TVT is enabled */
+       vids[0] = 0;
+       status = be_cmd_vlan_config(adapter, vf_if_id, vids, 1, vf + 1);
+       if (!status)
+               dev_info(&adapter->pdev->dev,
+                        "Cleared guest VLANs on VF%d", vf);
+
+       /* After TVT is enabled, disallow VFs to program VLAN filters */
+       if (vf_cfg->privileges & BE_PRIV_FILTMGMT) {
+               status = be_cmd_set_fn_privileges(adapter, vf_cfg->privileges &
+                                                 ~BE_PRIV_FILTMGMT, vf + 1);
+               if (!status)
+                       vf_cfg->privileges &= ~BE_PRIV_FILTMGMT;
+       }
+       return 0;
+}
+
+static int be_clear_vf_tvt(struct be_adapter *adapter, int vf)
+{
+       struct be_vf_cfg *vf_cfg = &adapter->vf_cfg[vf];
+       struct device *dev = &adapter->pdev->dev;
+       int status;
+
+       /* Reset Transparent VLAN Tagging. */
+       status = be_cmd_set_hsw_config(adapter, BE_RESET_VLAN_TAG_ID, vf + 1,
+                                      vf_cfg->if_handle, 0);
+       if (status)
+               return status;
+
+       /* Allow VFs to program VLAN filtering */
+       if (!(vf_cfg->privileges & BE_PRIV_FILTMGMT)) {
+               status = be_cmd_set_fn_privileges(adapter, vf_cfg->privileges |
+                                                 BE_PRIV_FILTMGMT, vf + 1);
+               if (!status) {
+                       vf_cfg->privileges |= BE_PRIV_FILTMGMT;
+                       dev_info(dev, "VF%d: FILTMGMT priv enabled", vf);
+               }
+       }
+
+       dev_info(dev,
+                "Disable/re-enable i/f in VM to clear Transparent VLAN tag");
+       return 0;
+}
+
 static int be_set_vf_vlan(struct net_device *netdev, int vf, u16 vlan, u8 qos)
 {
        struct be_adapter *adapter = netdev_priv(netdev);
        struct be_vf_cfg *vf_cfg = &adapter->vf_cfg[vf];
-       int status = 0;
+       int status;
 
        if (!sriov_enabled(adapter))
                return -EPERM;
@@ -1394,24 +1450,19 @@ static int be_set_vf_vlan(struct net_device *netdev, int vf, u16 vlan, u8 qos)
 
        if (vlan || qos) {
                vlan |= qos << VLAN_PRIO_SHIFT;
-               if (vf_cfg->vlan_tag != vlan)
-                       status = be_cmd_set_hsw_config(adapter, vlan, vf + 1,
-                                                      vf_cfg->if_handle, 0);
+               status = be_set_vf_tvt(adapter, vf, vlan);
        } else {
-               /* Reset Transparent Vlan Tagging. */
-               status = be_cmd_set_hsw_config(adapter, BE_RESET_VLAN_TAG_ID,
-                                              vf + 1, vf_cfg->if_handle, 0);
+               status = be_clear_vf_tvt(adapter, vf);
        }
 
        if (status) {
                dev_err(&adapter->pdev->dev,
-                       "VLAN %d config on VF %d failed : %#x\n", vlan,
-                       vf, status);
+                       "VLAN %d config on VF %d failed : %#x\n", vlan, vf,
+                       status);
                return be_cmd_status(status);
        }
 
        vf_cfg->vlan_tag = vlan;
-
        return 0;
 }
 
@@ -3339,7 +3390,6 @@ static int be_if_create(struct be_adapter *adapter, u32 *if_handle,
                        u32 cap_flags, u32 vf)
 {
        u32 en_flags;
-       int status;
 
        en_flags = BE_IF_FLAGS_UNTAGGED | BE_IF_FLAGS_BROADCAST |
                   BE_IF_FLAGS_MULTICAST | BE_IF_FLAGS_PASS_L3L4_ERRORS |
@@ -3347,10 +3397,7 @@ static int be_if_create(struct be_adapter *adapter, u32 *if_handle,
 
        en_flags &= cap_flags;
 
-       status = be_cmd_if_create(adapter, cap_flags, en_flags,
-                                 if_handle, vf);
-
-       return status;
+       return be_cmd_if_create(adapter, cap_flags, en_flags, if_handle, vf);
 }
 
 static int be_vfs_if_create(struct be_adapter *adapter)
@@ -3368,8 +3415,13 @@ static int be_vfs_if_create(struct be_adapter *adapter)
                if (!BE3_chip(adapter)) {
                        status = be_cmd_get_profile_config(adapter, &res,
                                                           vf + 1);
-                       if (!status)
+                       if (!status) {
                                cap_flags = res.if_cap_flags;
+                               /* Prevent VFs from enabling VLAN promiscuous
+                                * mode
+                                */
+                               cap_flags &= ~BE_IF_FLAGS_VLAN_PROMISCUOUS;
+                       }
                }
 
                status = be_if_create(adapter, &vf_cfg->if_handle,
@@ -3403,7 +3455,6 @@ static int be_vf_setup(struct be_adapter *adapter)
        struct device *dev = &adapter->pdev->dev;
        struct be_vf_cfg *vf_cfg;
        int status, old_vfs, vf;
-       u32 privileges;
 
        old_vfs = pci_num_vf(adapter->pdev);
 
@@ -3433,15 +3484,18 @@ static int be_vf_setup(struct be_adapter *adapter)
 
        for_all_vfs(adapter, vf_cfg, vf) {
                /* Allow VFs to programs MAC/VLAN filters */
-               status = be_cmd_get_fn_privileges(adapter, &privileges, vf + 1);
-               if (!status && !(privileges & BE_PRIV_FILTMGMT)) {
+               status = be_cmd_get_fn_privileges(adapter, &vf_cfg->privileges,
+                                                 vf + 1);
+               if (!status && !(vf_cfg->privileges & BE_PRIV_FILTMGMT)) {
                        status = be_cmd_set_fn_privileges(adapter,
-                                                         privileges |
+                                                         vf_cfg->privileges |
                                                          BE_PRIV_FILTMGMT,
                                                          vf + 1);
-                       if (!status)
+                       if (!status) {
+                               vf_cfg->privileges |= BE_PRIV_FILTMGMT;
                                dev_info(dev, "VF%d has FILTMGMT privilege\n",
                                         vf);
+                       }
                }
 
                /* Allow full available bandwidth */