Merge branch 'dsa-add-fabric-notifier'

Vivien Didelot says:

====================
net: dsa: add fabric notifier

When a switch fabric is composed of multiple switch chips, these chips
must be programmed accordingly when an event occurred on one of them.

Examples of such event include hardware bridging: when a Linux bridge
spans interconnected chips, they must be programmed to allow external
ports to ingress frames on their internal ports.

Another example is cross-chip hardware VLANs. Switch chips in-between
interconnected bridge ports must also configure a given VLAN to allow
packets to pass through them.

In order to support that, this patchset introduces a non-intrusive
notifier mechanism. It adds a notifier head in every DSA switch tree
(the said fabric), and a notifier block in every DSA switch chip.

When an even occurs, it is chained to all notifiers of the fabric.
Switch chips can react accordingly if they are cross-chip capable.

On a dynamic debug enabled system, bridging a port in a multi-chip
fabric will print something like this (ZII Rev B board):

    # brctl addif br0 lan3
    mv88e6085 0.1:00: crosschip DSA port 1.0 bridged to br0
    mv88e6085 0.4:00: crosschip DSA port 1.0 bridged to br0
    # brctl delif br0 lan3
    mv88e6085 0.1:00: crosschip DSA port 1.0 unbridged from br0
    mv88e6085 0.4:00: crosschip DSA port 1.0 unbridged from br0

Currently only bridging events are added. A patchset introducing support
for cross-chip hardware bridging configuration in mv88e6xxx will follow
right after. Then events for switchdev operations are next on the line.

We should note that non-switchdev events do not support rolling-back
switch-wide operations. We'll have to work on closer integration with
switchdev for that, like introducing new attributes or objects, to
benefit from the prepare and commit phases.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

7 files changed, 205 insertions, 49 deletions

diff --git a/include/net/dsa.h b/include/net/dsa.h

path: root/crypto.h

#ifndef CRYPTO_H
#define CRYPTO_H

#include "taia.h"
#include "crypto_verify_32.h"
#include "crypto_hash_sha512.h"
#include "crypto_box_curve25519xsalsa20poly1305.h"
#include "crypto_scalarmult_curve25519.h"
#include "crypto_auth_hmacsha512256.h"

#define crypto_box_zerobytes		crypto_box_curve25519xsalsa20poly1305_ZEROBYTES
#define crypto_box_boxzerobytes		crypto_box_curve25519xsalsa20poly1305_BOXZEROBYTES
#define crypto_box_noncebytes		crypto_box_curve25519xsalsa20poly1305_NONCEBYTES
#define crypto_box_beforenmbytes	crypto_box_curve25519xsalsa20poly1305_BEFORENMBYTES
#define crypto_box_beforenm		crypto_box_curve25519xsalsa20poly1305_beforenm
#define crypto_box_afternm		crypto_box_curve25519xsalsa20poly1305_afternm
#define crypto_box_open_afternm		crypto_box_curve25519xsalsa20poly1305_open_afternm
#define crypto_box_pub_key_size		crypto_box_curve25519xsalsa20poly1305_PUBLICKEYBYTES
#define crypto_box_sec_key_size		crypto_box_curve25519xsalsa20poly1305_SECRETKEYBYTES

#define NONCE_LENGTH			(sizeof(struct taia))
#define NONCE_RND_LENGTH		(crypto_box_boxzerobytes - NONCE_LENGTH)
#define NONCE_ALL_LENGTH		(crypto_box_boxzerobytes + NONCE_LENGTH)
#define NONCE_OFFSET			(crypto_box_noncebytes - NONCE_LENGTH)
#define NONCE_EDN_OFFSET(x)		((x) + NONCE_OFFSET)
#define NONCE_PKT_OFFSET(x)		((x) + NONCE_RND_LENGTH)

#endif /* CRYPTO_H */