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| author | Johannes Berg <johannes.berg@intel.com> | 2018-05-23 11:05:26 +0200 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2018-05-23 11:05:59 +0200 |
| commit | dd8070bff204a67fcb6585f18047841a895b68d7 (patch) | |
| tree | cce17d4b8eb8987194beb40498c8f83e74d6799f /include/net/erspan.h | |
| parent | cfg80211: add missing kernel-doc (diff) | |
| parent | Merge branch 'qed-firmware-TLV' (diff) | |
| download | linux-dd8070bff204a67fcb6585f18047841a895b68d7.tar.xz linux-dd8070bff204a67fcb6585f18047841a895b68d7.zip | |
Merge remote-tracking branch 'net-next/master' into mac80211-next
Bring in net-next which had pulled in net, so I have the changes
from mac80211 and can apply a patch that would otherwise conflict.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'include/net/erspan.h')
| -rw-r--r-- | include/net/erspan.h | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/include/net/erspan.h b/include/net/erspan.h index d044aa60cc76..b39643ef4c95 100644 --- a/include/net/erspan.h +++ b/include/net/erspan.h @@ -219,6 +219,33 @@ static inline __be32 erspan_get_timestamp(void) return htonl((u32)h_usecs); } +/* ERSPAN BSO (Bad/Short/Oversized), see RFC1757 + * 00b --> Good frame with no error, or unknown integrity + * 01b --> Payload is a Short Frame + * 10b --> Payload is an Oversized Frame + * 11b --> Payload is a Bad Frame with CRC or Alignment Error + */ +enum erspan_bso { + BSO_NOERROR = 0x0, + BSO_SHORT = 0x1, + BSO_OVERSIZED = 0x2, + BSO_BAD = 0x3, +}; + +static inline u8 erspan_detect_bso(struct sk_buff *skb) +{ + /* BSO_BAD is not handled because the frame CRC + * or alignment error information is in FCS. + */ + if (skb->len < ETH_ZLEN) + return BSO_SHORT; + + if (skb->len > ETH_FRAME_LEN) + return BSO_OVERSIZED; + + return BSO_NOERROR; +} + static inline void erspan_build_header_v2(struct sk_buff *skb, u32 id, u8 direction, u16 hwid, bool truncate, bool is_ipv4) @@ -248,6 +275,7 @@ static inline void erspan_build_header_v2(struct sk_buff *skb, vlan_tci = ntohs(qp->tci); } + bso = erspan_detect_bso(skb); skb_push(skb, sizeof(*ershdr) + ERSPAN_V2_MDSIZE); ershdr = (struct erspan_base_hdr *)skb->data; memset(ershdr, 0, sizeof(*ershdr) + ERSPAN_V2_MDSIZE); |