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mbuf: extend meaning of QinQ stripped bit

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Clarify the documentation of QinQ flags, and extend the meaning of the
flag: if PKT_RX_QINQ_STRIPPED is set and PKT_RX_VLAN_STRIPPED is unset,
only the outer VLAN is removed from packet data, but both tci are saved
in mbuf->vlan_tci (inner) and mbuf->vlan_tci_outer (outer).

Signed-off-by: Somnath Kotur <somnath.kotur@broadcom.com>
Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
Acked-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
This commit is contained in:
Somnath Kotur 2020-10-06 09:22:32 +02:00 committed by David Marchand
parent cd5db556ac
commit ed94631da7
1 changed files with 14 additions and 7 deletions
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21
lib/librte_mbuf/rte_mbuf_core.h
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@ -126,12 +126,19 @@ extern "C" {
#define PKT_RX_FDIR_FLX (1ULL << 14)
/**
* The 2 vlans have been stripped by the hardware and their tci are
* saved in mbuf->vlan_tci (inner) and mbuf->vlan_tci_outer (outer).
* This can only happen if vlan stripping is enabled in the RX
* The outer VLAN has been stripped by the hardware and its TCI is
* saved in mbuf->vlan_tci_outer.
* This can only happen if VLAN stripping is enabled in the Rx
* configuration of the PMD.
* When PKT_RX_QINQ_STRIPPED is set, the flags (PKT_RX_VLAN |
* PKT_RX_VLAN_STRIPPED | PKT_RX_QINQ) must also be set.
* When PKT_RX_QINQ_STRIPPED is set, the flags PKT_RX_VLAN and PKT_RX_QINQ
* must also be set.
*
* - If both PKT_RX_QINQ_STRIPPED and PKT_RX_VLAN_STRIPPED are set, the 2 VLANs
* have been stripped by the hardware and their TCIs are saved in
* mbuf->vlan_tci (inner) and mbuf->vlan_tci_outer (outer).
* - If PKT_RX_QINQ_STRIPPED is set and PKT_RX_VLAN_STRIPPED is unset, only the
* outer VLAN is removed from packet data, but both tci are saved in
* mbuf->vlan_tci (inner) and mbuf->vlan_tci_outer (outer).
*/
#define PKT_RX_QINQ_STRIPPED (1ULL << 15)
@ -159,8 +166,8 @@ extern "C" {
/**
* The RX packet is a double VLAN, and the outer tci has been
* saved in in mbuf->vlan_tci_outer. If PKT_RX_QINQ set, PKT_RX_VLAN
* also should be set and inner tci should be saved to mbuf->vlan_tci.
* saved in mbuf->vlan_tci_outer. If this flag is set, PKT_RX_VLAN
* must also be set and the inner tci is saved in mbuf->vlan_tci.
* If the flag PKT_RX_QINQ_STRIPPED is also present, both VLANs
* headers have been stripped from mbuf data, else they are still
* present.