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| author | Alexander Aring <alex.aring@gmail.com> | 2014-11-12 03:36:59 +0100 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2014-11-12 05:10:40 +0100 |
| commit | 656a999e8701c1e3d17040f051d3a080ec6c710c (patch) | |
| tree | a20af2f92a05c2ab17410be17c3b563fd6f72afb /net/ieee802154/nl802154.c | |
| parent | 9830c62a0b3d57d9d00880989cfe987f581bc03f (diff) | |
| download | linux-0-day-656a999e8701c1e3d17040f051d3a080ec6c710c.tar.gz linux-0-day-656a999e8701c1e3d17040f051d3a080ec6c710c.tar.xz | |
ieee820154: add backoff exponent setting support
This patch adds support for setting backoff exponents via nl802154
framework.
Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'net/ieee802154/nl802154.c')
| -rw-r--r-- | net/ieee802154/nl802154.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/net/ieee802154/nl802154.c b/net/ieee802154/nl802154.c index 2978c1a78017b..d1cf3021ff364 100644 --- a/net/ieee802154/nl802154.c +++ b/net/ieee802154/nl802154.c @@ -616,6 +616,32 @@ static int nl802154_set_short_addr(struct sk_buff *skb, struct genl_info *info) return rdev_set_short_addr(rdev, wpan_dev, short_addr); } +static int +nl802154_set_backoff_exponent(struct sk_buff *skb, struct genl_info *info) +{ + struct cfg802154_registered_device *rdev = info->user_ptr[0]; + struct net_device *dev = info->user_ptr[1]; + struct wpan_dev *wpan_dev = dev->ieee802154_ptr; + u8 min_be, max_be; + + /* should be set on netif open inside phy settings */ + if (netif_running(dev)) + return -EBUSY; + + if (!info->attrs[NL802154_ATTR_MIN_BE] || + !info->attrs[NL802154_ATTR_MAX_BE]) + return -EINVAL; + + min_be = nla_get_u8(info->attrs[NL802154_ATTR_MIN_BE]); + max_be = nla_get_u8(info->attrs[NL802154_ATTR_MAX_BE]); + + /* check 802.15.4 constraints */ + if (max_be < 3 || max_be > 8 || min_be > max_be) + return -EINVAL; + + return rdev_set_backoff_exponent(rdev, wpan_dev, min_be, max_be); +} + #define NL802154_FLAG_NEED_WPAN_PHY 0x01 #define NL802154_FLAG_NEED_NETDEV 0x02 #define NL802154_FLAG_NEED_RTNL 0x04 @@ -750,6 +776,14 @@ static const struct genl_ops nl802154_ops[] = { .internal_flags = NL802154_FLAG_NEED_NETDEV | NL802154_FLAG_NEED_RTNL, }, + { + .cmd = NL802154_CMD_SET_BACKOFF_EXPONENT, + .doit = nl802154_set_backoff_exponent, + .policy = nl802154_policy, + .flags = GENL_ADMIN_PERM, + .internal_flags = NL802154_FLAG_NEED_NETDEV | + NL802154_FLAG_NEED_RTNL, + }, }; /* initialisation/exit functions */ |