diff --git a/net/dsa/dsa_priv.h b/net/dsa/dsa_priv.h index eccc62776283..d429505dc4e7 100644 --- a/net/dsa/dsa_priv.h +++ b/net/dsa/dsa_priv.h @@ -113,6 +113,25 @@ int dsa_legacy_fdb_del(struct ndmsg *ndm, struct nlattr *tb[], int dsa_master_ethtool_setup(struct net_device *dev); void dsa_master_ethtool_restore(struct net_device *dev); +static inline struct net_device *dsa_master_get_slave(struct net_device *dev, + int device, int port) +{ + struct dsa_switch_tree *dst = dev->dsa_ptr; + struct dsa_switch *ds; + + if (device < 0 || device >= DSA_MAX_SWITCHES) + return NULL; + + ds = dst->ds[device]; + if (!ds) + return NULL; + + if (port < 0 || port >= ds->num_ports) + return NULL; + + return ds->ports[port].netdev; +} + /* port.c */ int dsa_port_set_state(struct dsa_port *dp, u8 state, struct switchdev_trans *trans); @@ -182,9 +201,4 @@ static inline struct net_device *dsa_master_netdev(struct dsa_slave_priv *p) return p->dp->cpu_dp->netdev; } -static inline struct dsa_port *dsa_get_cpu_port(struct dsa_switch_tree *dst) -{ - return dst->cpu_dp; -} - #endif diff --git a/net/dsa/tag_brcm.c b/net/dsa/tag_brcm.c index dbb016434ace..8e4bdb9d9ae3 100644 --- a/net/dsa/tag_brcm.c +++ b/net/dsa/tag_brcm.c @@ -92,9 +92,6 @@ static struct sk_buff *brcm_tag_xmit(struct sk_buff *skb, struct net_device *dev static struct sk_buff *brcm_tag_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt) { - struct dsa_switch_tree *dst = dev->dsa_ptr; - struct dsa_port *cpu_dp = dsa_get_cpu_port(dst); - struct dsa_switch *ds = cpu_dp->ds; int source_port; u8 *brcm_tag; @@ -117,8 +114,8 @@ static struct sk_buff *brcm_tag_rcv(struct sk_buff *skb, struct net_device *dev, /* Locate which port this is coming from */ source_port = brcm_tag[3] & BRCM_EG_PID_MASK; - /* Validate port against switch setup, either the port is totally */ - if (source_port >= ds->num_ports || !ds->ports[source_port].netdev) + skb->dev = dsa_master_get_slave(dev, 0, source_port); + if (!skb->dev) return NULL; /* Remove Broadcom tag and update checksum */ @@ -129,8 +126,6 @@ static struct sk_buff *brcm_tag_rcv(struct sk_buff *skb, struct net_device *dev, skb->data - ETH_HLEN - BRCM_TAG_LEN, 2 * ETH_ALEN); - skb->dev = ds->ports[source_port].netdev; - return skb; } diff --git a/net/dsa/tag_dsa.c b/net/dsa/tag_dsa.c index fbf9ca954773..c77218f173d1 100644 --- a/net/dsa/tag_dsa.c +++ b/net/dsa/tag_dsa.c @@ -67,8 +67,6 @@ static struct sk_buff *dsa_xmit(struct sk_buff *skb, struct net_device *dev) static struct sk_buff *dsa_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt) { - struct dsa_switch_tree *dst = dev->dsa_ptr; - struct dsa_switch *ds; u8 *dsa_header; int source_device; int source_port; @@ -93,18 +91,8 @@ static struct sk_buff *dsa_rcv(struct sk_buff *skb, struct net_device *dev, source_device = dsa_header[0] & 0x1f; source_port = (dsa_header[1] >> 3) & 0x1f; - /* - * Check that the source device exists and that the source - * port is a registered DSA port. - */ - if (source_device >= DSA_MAX_SWITCHES) - return NULL; - - ds = dst->ds[source_device]; - if (!ds) - return NULL; - - if (source_port >= ds->num_ports || !ds->ports[source_port].netdev) + skb->dev = dsa_master_get_slave(dev, source_device, source_port); + if (!skb->dev) return NULL; /* @@ -153,8 +141,6 @@ static struct sk_buff *dsa_rcv(struct sk_buff *skb, struct net_device *dev, 2 * ETH_ALEN); } - skb->dev = ds->ports[source_port].netdev; - return skb; } diff --git a/net/dsa/tag_edsa.c b/net/dsa/tag_edsa.c index 76367ba1b2e2..0b83cbe0c9e8 100644 --- a/net/dsa/tag_edsa.c +++ b/net/dsa/tag_edsa.c @@ -80,8 +80,6 @@ static struct sk_buff *edsa_xmit(struct sk_buff *skb, struct net_device *dev) static struct sk_buff *edsa_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt) { - struct dsa_switch_tree *dst = dev->dsa_ptr; - struct dsa_switch *ds; u8 *edsa_header; int source_device; int source_port; @@ -106,18 +104,8 @@ static struct sk_buff *edsa_rcv(struct sk_buff *skb, struct net_device *dev, source_device = edsa_header[0] & 0x1f; source_port = (edsa_header[1] >> 3) & 0x1f; - /* - * Check that the source device exists and that the source - * port is a registered DSA port. - */ - if (source_device >= DSA_MAX_SWITCHES) - return NULL; - - ds = dst->ds[source_device]; - if (!ds) - return NULL; - - if (source_port >= ds->num_ports || !ds->ports[source_port].netdev) + skb->dev = dsa_master_get_slave(dev, source_device, source_port); + if (!skb->dev) return NULL; /* @@ -172,8 +160,6 @@ static struct sk_buff *edsa_rcv(struct sk_buff *skb, struct net_device *dev, 2 * ETH_ALEN); } - skb->dev = ds->ports[source_port].netdev; - return skb; } diff --git a/net/dsa/tag_ksz.c b/net/dsa/tag_ksz.c index 010ca0a336c4..b241c990cde0 100644 --- a/net/dsa/tag_ksz.c +++ b/net/dsa/tag_ksz.c @@ -80,22 +80,19 @@ static struct sk_buff *ksz_xmit(struct sk_buff *skb, struct net_device *dev) static struct sk_buff *ksz_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt) { - struct dsa_switch_tree *dst = dev->dsa_ptr; - struct dsa_port *cpu_dp = dsa_get_cpu_port(dst); - struct dsa_switch *ds = cpu_dp->ds; u8 *tag; int source_port; tag = skb_tail_pointer(skb) - KSZ_EGRESS_TAG_LEN; source_port = tag[0] & 7; - if (source_port >= ds->num_ports || !ds->ports[source_port].netdev) + + skb->dev = dsa_master_get_slave(dev, 0, source_port); + if (!skb->dev) return NULL; pskb_trim_rcsum(skb, skb->len - KSZ_EGRESS_TAG_LEN); - skb->dev = ds->ports[source_port].netdev; - return skb; } diff --git a/net/dsa/tag_lan9303.c b/net/dsa/tag_lan9303.c index 0b9826105e42..4f211e56c81f 100644 --- a/net/dsa/tag_lan9303.c +++ b/net/dsa/tag_lan9303.c @@ -71,17 +71,8 @@ static struct sk_buff *lan9303_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt) { u16 *lan9303_tag; - struct dsa_switch_tree *dst = dev->dsa_ptr; - struct dsa_switch *ds; unsigned int source_port; - ds = dst->ds[0]; - - if (unlikely(!ds)) { - dev_warn_ratelimited(&dev->dev, "Dropping packet, due to missing DSA switch device\n"); - return NULL; - } - if (unlikely(!pskb_may_pull(skb, LAN9303_TAG_LEN))) { dev_warn_ratelimited(&dev->dev, "Dropping packet, cannot pull\n"); @@ -103,16 +94,12 @@ static struct sk_buff *lan9303_rcv(struct sk_buff *skb, struct net_device *dev, source_port = ntohs(lan9303_tag[1]) & 0x3; - if (source_port >= ds->num_ports) { + skb->dev = dsa_master_get_slave(dev, 0, source_port); + if (!skb->dev) { dev_warn_ratelimited(&dev->dev, "Dropping packet due to invalid source port\n"); return NULL; } - if (!ds->ports[source_port].netdev) { - dev_warn_ratelimited(&dev->dev, "Dropping packet due to invalid netdev or device\n"); - return NULL; - } - /* remove the special VLAN tag between the MAC addresses * and the current ethertype field. */ @@ -120,9 +107,6 @@ static struct sk_buff *lan9303_rcv(struct sk_buff *skb, struct net_device *dev, memmove(skb->data - ETH_HLEN, skb->data - (ETH_HLEN + LAN9303_TAG_LEN), 2 * ETH_ALEN); - /* forward the packet to the dedicated interface */ - skb->dev = ds->ports[source_port].netdev; - return skb; } diff --git a/net/dsa/tag_mtk.c b/net/dsa/tag_mtk.c index ec8ee5f43255..968586c5d40e 100644 --- a/net/dsa/tag_mtk.c +++ b/net/dsa/tag_mtk.c @@ -46,8 +46,6 @@ static struct sk_buff *mtk_tag_xmit(struct sk_buff *skb, static struct sk_buff *mtk_tag_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt) { - struct dsa_switch_tree *dst = dev->dsa_ptr; - struct dsa_switch *ds; int port; __be16 *phdr, hdr; @@ -68,20 +66,12 @@ static struct sk_buff *mtk_tag_rcv(struct sk_buff *skb, struct net_device *dev, skb->data - ETH_HLEN - MTK_HDR_LEN, 2 * ETH_ALEN); - /* This protocol doesn't support cascading multiple - * switches so it's safe to assume the switch is first - * in the tree. - */ - ds = dst->ds[0]; - if (!ds) - return NULL; - /* Get source port information */ port = (hdr & MTK_HDR_RECV_SOURCE_PORT_MASK); - if (!ds->ports[port].netdev) - return NULL; - skb->dev = ds->ports[port].netdev; + skb->dev = dsa_master_get_slave(dev, 0, port); + if (!skb->dev) + return NULL; return skb; } diff --git a/net/dsa/tag_qca.c b/net/dsa/tag_qca.c index 1d4c70711c0f..8d33d9ebf910 100644 --- a/net/dsa/tag_qca.c +++ b/net/dsa/tag_qca.c @@ -65,9 +65,6 @@ static struct sk_buff *qca_tag_xmit(struct sk_buff *skb, struct net_device *dev) static struct sk_buff *qca_tag_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt) { - struct dsa_switch_tree *dst = dev->dsa_ptr; - struct dsa_port *cpu_dp = dsa_get_cpu_port(dst); - struct dsa_switch *ds; u8 ver; int port; __be16 *phdr, hdr; @@ -92,20 +89,12 @@ static struct sk_buff *qca_tag_rcv(struct sk_buff *skb, struct net_device *dev, memmove(skb->data - ETH_HLEN, skb->data - ETH_HLEN - QCA_HDR_LEN, ETH_HLEN - QCA_HDR_LEN); - /* This protocol doesn't support cascading multiple switches so it's - * safe to assume the switch is first in the tree - */ - ds = cpu_dp->ds; - if (!ds) - return NULL; - /* Get source port information */ port = (hdr & QCA_HDR_RECV_SOURCE_PORT_MASK); - if (!ds->ports[port].netdev) - return NULL; - /* Update skb & forward the frame accordingly */ - skb->dev = ds->ports[port].netdev; + skb->dev = dsa_master_get_slave(dev, 0, port); + if (!skb->dev) + return NULL; return skb; } diff --git a/net/dsa/tag_trailer.c b/net/dsa/tag_trailer.c index d2fd4923aa3e..61668be267f5 100644 --- a/net/dsa/tag_trailer.c +++ b/net/dsa/tag_trailer.c @@ -58,9 +58,6 @@ static struct sk_buff *trailer_xmit(struct sk_buff *skb, struct net_device *dev) static struct sk_buff *trailer_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt) { - struct dsa_switch_tree *dst = dev->dsa_ptr; - struct dsa_port *cpu_dp = dsa_get_cpu_port(dst); - struct dsa_switch *ds = cpu_dp->ds; u8 *trailer; int source_port; @@ -73,13 +70,13 @@ static struct sk_buff *trailer_rcv(struct sk_buff *skb, struct net_device *dev, return NULL; source_port = trailer[1] & 7; - if (source_port >= ds->num_ports || !ds->ports[source_port].netdev) + + skb->dev = dsa_master_get_slave(dev, 0, source_port); + if (!skb->dev) return NULL; pskb_trim_rcsum(skb, skb->len - 4); - skb->dev = ds->ports[source_port].netdev; - return skb; }