projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 6bc506b4 IS |
1 | #include <linux/kernel.h> |
| 2 | #include <linux/list.h> | |
| 3 | #include <linux/netdevice.h> | |
| 4 | #include <linux/rtnetlink.h> | |
| 5 | #include <linux/skbuff.h> | |
| 6 | #include <net/switchdev.h> | |
| 7 | ||
| 8 | #include "br_private.h" | |
| 9 | ||
| 10 | static int br_switchdev_mark_get(struct net_bridge *br, struct net_device *dev) | |
| 11 | { | |
| 12 | struct net_bridge_port *p; | |
| 13 | ||
| 14 | /* dev is yet to be added to the port list. */ | |
| 15 | list_for_each_entry(p, &br->port_list, list) { | |
| 16 | if (switchdev_port_same_parent_id(dev, p->dev)) | |
| 17 | return p->offload_fwd_mark; | |
| 18 | } | |
| 19 | ||
| 20 | return ++br->offload_fwd_mark; | |
| 21 | } | |
| 22 | ||
| 23 | int nbp_switchdev_mark_set(struct net_bridge_port *p) | |
| 24 | { | |
| 25 | struct switchdev_attr attr = { | |
| 26 | .orig_dev = p->dev, | |
| 27 | .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID, | |
| 28 | }; | |
| 29 | int err; | |
| 30 | ||
| 31 | ASSERT_RTNL(); | |
| 32 | ||
| 33 | err = switchdev_port_attr_get(p->dev, &attr); | |
| 34 | if (err) { | |
| 35 | if (err == -EOPNOTSUPP) | |
| 36 | return 0; | |
| 37 | return err; | |
| 38 | } | |
| 39 | ||
| 40 | p->offload_fwd_mark = br_switchdev_mark_get(p->br, p->dev); | |
| 41 | ||
| 42 | return 0; | |
| 43 | } | |
| 44 | ||
| 45 | void nbp_switchdev_frame_mark(const struct net_bridge_port *p, | |
| 46 | struct sk_buff *skb) | |
| 47 | { | |
| 48 | if (skb->offload_fwd_mark && !WARN_ON_ONCE(!p->offload_fwd_mark)) | |
| 49 | BR_INPUT_SKB_CB(skb)->offload_fwd_mark = p->offload_fwd_mark; | |
| 50 | } | |
| 51 | ||
| 52 | bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, | |
| 53 | const struct sk_buff *skb) | |
| 54 | { | |
| 55 | return !skb->offload_fwd_mark || | |
| 56 | BR_INPUT_SKB_CB(skb)->offload_fwd_mark != p->offload_fwd_mark; | |
| 57 | } | |
| 3922285d AS |
58 | |
| 59 | /* Flags that can be offloaded to hardware */ | |
| 60 | #define BR_PORT_FLAGS_HW_OFFLOAD (BR_LEARNING | BR_FLOOD | \ | |
| 61 | BR_MCAST_FLOOD | BR_BCAST_FLOOD) | |
| 62 | ||
| 63 | int br_switchdev_set_port_flag(struct net_bridge_port *p, | |
| 64 | unsigned long flags, | |
| 65 | unsigned long mask) | |
| 66 | { | |
| 67 | struct switchdev_attr attr = { | |
| 68 | .orig_dev = p->dev, | |
| 69 | .id = SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS_SUPPORT, | |
| 70 | }; | |
| 71 | int err; | |
| 72 | ||
| 73 | if (mask & ~BR_PORT_FLAGS_HW_OFFLOAD) | |
| 74 | return 0; | |
| 75 | ||
| 76 | err = switchdev_port_attr_get(p->dev, &attr); | |
| 77 | if (err == -EOPNOTSUPP) | |
| 78 | return 0; | |
| 79 | if (err) | |
| 80 | return err; | |
| 81 | ||
| 82 | /* Check if specific bridge flag attribute offload is supported */ | |
| 83 | if (!(attr.u.brport_flags_support & mask)) { | |
| 84 | br_warn(p->br, "bridge flag offload is not supported %u(%s)\n", | |
| 85 | (unsigned int)p->port_no, p->dev->name); | |
| 86 | return -EOPNOTSUPP; | |
| 87 | } | |
| 88 | ||
| 89 | attr.id = SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS; | |
| 90 | attr.flags = SWITCHDEV_F_DEFER; | |
| 91 | attr.u.brport_flags = flags; | |
| 92 | err = switchdev_port_attr_set(p->dev, &attr); | |
| 93 | if (err) { | |
| 94 | br_warn(p->br, "error setting offload flag on port %u(%s)\n", | |
| 95 | (unsigned int)p->port_no, p->dev->name); | |
| 96 | return err; | |
| 97 | } | |
| 98 | ||
| 99 | return 0; | |
| 100 | } |