ieee802154: add LIST_PHY command support

Add nl802154 command to get information about PHY's present in
the system.

Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>

diff --git a/include/linux/nl802154.h b/include/linux/nl802154.h
index b7d9435..275fd94 100644 (file)
--- a/include/linux/nl802154.h
+++ b/include/linux/nl802154.h
@@ -65,6 +65,9 @@ enum {
        IEEE802154_ATTR_SEC,
 
        IEEE802154_ATTR_PAGE,
+       IEEE802154_ATTR_CHANNEL_PAGE_LIST,
+
+       IEEE802154_ATTR_PHY_NAME,
 
        __IEEE802154_ATTR_MAX,
 };
@@ -114,6 +117,7 @@ enum {
        IEEE802154_RX_ENABLE_CONF, /* Not supported yet */
 
        IEEE802154_LIST_IFACE,
+       IEEE802154_LIST_PHY,
 
        __IEEE802154_CMD_MAX,
 };

diff --git a/net/ieee802154/Makefile b/net/ieee802154/Makefile
index 69af9f6..ce2d335 100644 (file)
--- a/net/ieee802154/Makefile
+++ b/net/ieee802154/Makefile
@@ -1,5 +1,5 @@
 obj-$(CONFIG_IEEE802154) +=    ieee802154.o af_802154.o
-ieee802154-y           := netlink.o nl-mac.o nl_policy.o wpan-class.o
+ieee802154-y           := netlink.o nl-mac.o nl-phy.o nl_policy.o wpan-class.o
 af_802154-y            := af_ieee802154.o raw.o dgram.o
 
 ccflags-y += -Wall -DDEBUG

diff --git a/net/ieee802154/netlink.c b/net/ieee802154/netlink.c
index 5b738ec..8a22173 100644 (file)
--- a/net/ieee802154/netlink.c
+++ b/net/ieee802154/netlink.c
@@ -87,6 +87,10 @@ int __init ieee802154_nl_init(void)
        if (rc)
                goto fail;
 
+       rc = nl802154_phy_register();
+       if (rc)
+               goto fail;
+
        return 0;
 
 fail:

diff --git a/net/ieee802154/nl-phy.c b/net/ieee802154/nl-phy.c
new file mode 100644 (file)
index 0000000..b7af722
--- /dev/null
+++ b/net/ieee802154/nl-phy.c
@@ -0,0 +1,188 @@
+/*
+ * Netlink inteface for IEEE 802.15.4 stack
+ *
+ * Copyright 2007, 2008 Siemens AG
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Written by:
+ * Sergey Lapin <slapin@ossfans.org>
+ * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
+ * Maxim Osipov <maxim.osipov@siemens.com>
+ */
+
+#include <linux/kernel.h>
+#include <net/netlink.h>
+#include <net/genetlink.h>
+#include <net/wpan-phy.h>
+#include <linux/nl802154.h>
+
+#include "ieee802154.h"
+
+static int ieee802154_nl_fill_phy(struct sk_buff *msg, u32 pid,
+       u32 seq, int flags, struct wpan_phy *phy)
+{
+       void *hdr;
+       int i, pages = 0;
+       uint32_t *buf = kzalloc(32 * sizeof(uint32_t), GFP_KERNEL);
+
+       pr_debug("%s\n", __func__);
+
+       if (!buf)
+               goto out;
+
+       hdr = genlmsg_put(msg, 0, seq, &nl802154_family, flags,
+               IEEE802154_LIST_PHY);
+       if (!hdr)
+               goto out;
+
+       mutex_lock(&phy->pib_lock);
+       NLA_PUT_STRING(msg, IEEE802154_ATTR_PHY_NAME, wpan_phy_name(phy));
+
+       NLA_PUT_U8(msg, IEEE802154_ATTR_PAGE, phy->current_page);
+       NLA_PUT_U8(msg, IEEE802154_ATTR_CHANNEL, phy->current_channel);
+       for (i = 0; i < 32; i++) {
+               if (phy->channels_supported[i])
+                       buf[pages++] = phy->channels_supported[i] | (i << 27);
+       }
+       if (pages)
+               NLA_PUT(msg, IEEE802154_ATTR_CHANNEL_PAGE_LIST,
+                               pages * sizeof(uint32_t), buf);
+
+       mutex_unlock(&phy->pib_lock);
+       return genlmsg_end(msg, hdr);
+
+nla_put_failure:
+       mutex_unlock(&phy->pib_lock);
+       genlmsg_cancel(msg, hdr);
+out:
+       kfree(buf);
+       return -EMSGSIZE;
+}
+
+static int ieee802154_list_phy(struct sk_buff *skb,
+       struct genl_info *info)
+{
+       /* Request for interface name, index, type, IEEE address,
+          PAN Id, short address */
+       struct sk_buff *msg;
+       struct wpan_phy *phy;
+       const char *name;
+       int rc = -ENOBUFS;
+
+       pr_debug("%s\n", __func__);
+
+       if (!info->attrs[IEEE802154_ATTR_PHY_NAME])
+               return -EINVAL;
+
+       name = nla_data(info->attrs[IEEE802154_ATTR_PHY_NAME]);
+       if (name[nla_len(info->attrs[IEEE802154_ATTR_PHY_NAME]) - 1] != '\0')
+               return -EINVAL; /* phy name should be null-terminated */
+
+
+       phy = wpan_phy_find(name);
+       if (!phy)
+               return -ENODEV;
+
+       msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+       if (!msg)
+               goto out_dev;
+
+       rc = ieee802154_nl_fill_phy(msg, info->snd_pid, info->snd_seq,
+                       0, phy);
+       if (rc < 0)
+               goto out_free;
+
+       wpan_phy_put(phy);
+
+       return genlmsg_reply(msg, info);
+out_free:
+       nlmsg_free(msg);
+out_dev:
+       wpan_phy_put(phy);
+       return rc;
+
+}
+
+struct dump_phy_data {
+       struct sk_buff *skb;
+       struct netlink_callback *cb;
+       int idx, s_idx;
+};
+
+static int ieee802154_dump_phy_iter(struct wpan_phy *phy, void *_data)
+{
+       int rc;
+       struct dump_phy_data *data = _data;
+
+       pr_debug("%s\n", __func__);
+
+       if (data->idx++ < data->s_idx)
+               return 0;
+
+       rc = ieee802154_nl_fill_phy(data->skb,
+                       NETLINK_CB(data->cb->skb).pid,
+                       data->cb->nlh->nlmsg_seq,
+                       NLM_F_MULTI,
+                       phy);
+
+       if (rc < 0) {
+               data->idx--;
+               return rc;
+       }
+
+       return 0;
+}
+
+static int ieee802154_dump_phy(struct sk_buff *skb,
+       struct netlink_callback *cb)
+{
+       struct dump_phy_data data = {
+               .cb = cb,
+               .skb = skb,
+               .s_idx = cb->args[0],
+               .idx = 0,
+       };
+
+       pr_debug("%s\n", __func__);
+
+       wpan_phy_for_each(ieee802154_dump_phy_iter, &data);
+
+       cb->args[0] = data.idx;
+
+       return skb->len;
+}
+
+static struct genl_ops ieee802154_phy_ops[] = {
+       IEEE802154_DUMP(IEEE802154_LIST_PHY, ieee802154_list_phy,
+                                                       ieee802154_dump_phy),
+};
+
+/*
+ * No need to unregister as family unregistration will do it.
+ */
+int nl802154_phy_register(void)
+{
+       int i;
+       int rc;
+
+       for (i = 0; i < ARRAY_SIZE(ieee802154_phy_ops); i++) {
+               rc = genl_register_ops(&nl802154_family,
+                               &ieee802154_phy_ops[i]);
+               if (rc)
+                       return rc;
+       }
+
+       return 0;
+}

diff --git a/net/ieee802154/nl_policy.c b/net/ieee802154/nl_policy.c
index 2363ebe..6adda4d 100644 (file)
--- a/net/ieee802154/nl_policy.c
+++ b/net/ieee802154/nl_policy.c
@@ -27,6 +27,7 @@
 const struct nla_policy ieee802154_policy[IEEE802154_ATTR_MAX + 1] = {
        [IEEE802154_ATTR_DEV_NAME] = { .type = NLA_STRING, },
        [IEEE802154_ATTR_DEV_INDEX] = { .type = NLA_U32, },
+       [IEEE802154_ATTR_PHY_NAME] = { .type = NLA_STRING, },
 
        [IEEE802154_ATTR_STATUS] = { .type = NLA_U8, },
        [IEEE802154_ATTR_SHORT_ADDR] = { .type = NLA_U16, },
@@ -50,5 +51,6 @@ const struct nla_policy ieee802154_policy[IEEE802154_ATTR_MAX + 1] = {
        [IEEE802154_ATTR_CHANNELS] = { .type = NLA_U32, },
        [IEEE802154_ATTR_DURATION] = { .type = NLA_U8, },
        [IEEE802154_ATTR_ED_LIST] = { .len = 27 },
+       [IEEE802154_ATTR_CHANNEL_PAGE_LIST] = { .len = 32 * 4, },
 };