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wimax connection manager / daemon has to know what is current state of the device. Previously it was only possible to get notification whet state has changed. Note: By mistake, the new generic netlink's number for WIMAX_GNL_OP_STATE_GET was declared inserting into the existing list of API calls, not appending; thus, it'd break existing API. Fixed by Inaky Perez-Gonzalez <inaky@linux.intel.com> by moving to the tail, where we add to the interface, not modify the interface. Thanks to Stephen Hemminger <shemminger@vyatta.com> for catching this. Signed-off-by: Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
86 lines
2.5 KiB
C
86 lines
2.5 KiB
C
/*
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* Linux WiMAX
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* Implement and export a method for getting a WiMAX device current state
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*
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* Copyright (C) 2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
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*
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* Based on previous WiMAX core work by:
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* Copyright (C) 2008 Intel Corporation <linux-wimax@intel.com>
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* Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version
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* 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*/
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#include <net/wimax.h>
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#include <net/genetlink.h>
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#include <linux/wimax.h>
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#include <linux/security.h>
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#include "wimax-internal.h"
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#define D_SUBMODULE op_state_get
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#include "debug-levels.h"
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static const
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struct nla_policy wimax_gnl_state_get_policy[WIMAX_GNL_ATTR_MAX + 1] = {
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[WIMAX_GNL_STGET_IFIDX] = {
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.type = NLA_U32,
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},
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};
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/*
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* Exporting to user space over generic netlink
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*
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* Parse the state get command from user space, return a combination
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* value that describe the current state.
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*
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* No attributes.
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*/
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static
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int wimax_gnl_doit_state_get(struct sk_buff *skb, struct genl_info *info)
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{
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int result, ifindex;
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struct wimax_dev *wimax_dev;
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struct device *dev;
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d_fnstart(3, NULL, "(skb %p info %p)\n", skb, info);
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result = -ENODEV;
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if (info->attrs[WIMAX_GNL_STGET_IFIDX] == NULL) {
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printk(KERN_ERR "WIMAX_GNL_OP_STATE_GET: can't find IFIDX "
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"attribute\n");
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goto error_no_wimax_dev;
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}
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ifindex = nla_get_u32(info->attrs[WIMAX_GNL_STGET_IFIDX]);
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wimax_dev = wimax_dev_get_by_genl_info(info, ifindex);
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if (wimax_dev == NULL)
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goto error_no_wimax_dev;
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dev = wimax_dev_to_dev(wimax_dev);
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/* Execute the operation and send the result back to user space */
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result = wimax_state_get(wimax_dev);
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dev_put(wimax_dev->net_dev);
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error_no_wimax_dev:
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d_fnend(3, NULL, "(skb %p info %p) = %d\n", skb, info, result);
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return result;
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}
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struct genl_ops wimax_gnl_state_get = {
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.cmd = WIMAX_GNL_OP_STATE_GET,
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.flags = GENL_ADMIN_PERM,
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.policy = wimax_gnl_state_get_policy,
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.doit = wimax_gnl_doit_state_get,
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.dumpit = NULL,
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};
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