[PATCH 1/5] ieee802154: document the skb->cb usage clearly.
From: Dmitry Eremin-Solenikov <hidden>
Date: 2009-08-20 16:13:03
Subsystem:
documentation, networking [general], the rest · Maintainers:
Jonathan Corbet, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Signed-off-by: Dmitry Eremin-Solenikov <redacted> --- Documentation/networking/ieee802154.txt | 9 +++++++-- 1 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/Documentation/networking/ieee802154.txt b/Documentation/networking/ieee802154.txt
index 1c0c82c..23c995e 100644
--- a/Documentation/networking/ieee802154.txt
+++ b/Documentation/networking/ieee802154.txt@@ -56,8 +56,12 @@ HardMAC See the header include/net/ieee802154_netdev.h. You have to implement Linux net_device, with .type = ARPHRD_IEEE802154. Data is exchanged with socket family -code via plain sk_buffs. The control block of sk_buffs will contain additional -info as described in the struct ieee802154_mac_cb. +code via plain sk_buffs. On skb reception skb->cb must contain additional +info as described in the struct ieee802154_mac_cb. During packet transmission +the skb->cb is used to provide additional data to device's header_ops->create +function. Be aware, that this data can be overriden later (when socket code +submits skb to qdisc), so if you need something from that cb later, you should +store info in the skb->data on your own. To hook the MLME interface you have to populate the ml_priv field of your net_device with a pointer to struct ieee802154_mlme_ops instance. All fields are
@@ -73,3 +77,4 @@ We are going to provide intermediate layer implementing IEEE 802.15.4 MAC in software. This is currently WIP. See header include/net/mac802154.h and several drivers in drivers/ieee802154/. +
--
1.6.3.3
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