Release 4.11 net/nfc/netlink.c

Directory: net/nfc
/*
 * Copyright (C) 2011 Instituto Nokia de Tecnologia
 *
 * Authors:
 *    Lauro Ramos Venancio <lauro.venancio@openbossa.org>
 *    Aloisio Almeida Jr <aloisio.almeida@openbossa.org>
 *
 * Vendor commands implementation based on net/wireless/nl80211.c
 * which is:
 *
 * Copyright 2006-2010  Johannes Berg <johannes@sipsolutions.net>
 * Copyright 2013-2014  Intel Mobile Communications GmbH
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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, see <http://www.gnu.org/licenses/>.
 */


#define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__

#include <net/genetlink.h>
#include <linux/nfc.h>
#include <linux/slab.h>

#include "nfc.h"
#include "llcp.h"


static const struct genl_multicast_group nfc_genl_mcgrps[] = {
	{ .name = NFC_GENL_MCAST_EVENT_NAME, },
};


static struct genl_family nfc_genl_family;

static const struct nla_policy nfc_genl_policy[NFC_ATTR_MAX + 1] = {
	[NFC_ATTR_DEVICE_INDEX] = { .type = NLA_U32 },
	[NFC_ATTR_DEVICE_NAME] = { .type = NLA_STRING,
				.len = NFC_DEVICE_NAME_MAXSIZE },
	[NFC_ATTR_PROTOCOLS] = { .type = NLA_U32 },
	[NFC_ATTR_COMM_MODE] = { .type = NLA_U8 },
	[NFC_ATTR_RF_MODE] = { .type = NLA_U8 },
	[NFC_ATTR_DEVICE_POWERED] = { .type = NLA_U8 },
	[NFC_ATTR_IM_PROTOCOLS] = { .type = NLA_U32 },
	[NFC_ATTR_TM_PROTOCOLS] = { .type = NLA_U32 },
	[NFC_ATTR_LLC_PARAM_LTO] = { .type = NLA_U8 },
	[NFC_ATTR_LLC_PARAM_RW] = { .type = NLA_U8 },
	[NFC_ATTR_LLC_PARAM_MIUX] = { .type = NLA_U16 },
	[NFC_ATTR_LLC_SDP] = { .type = NLA_NESTED },
	[NFC_ATTR_FIRMWARE_NAME] = { .type = NLA_STRING,
				     .len = NFC_FIRMWARE_NAME_MAXSIZE },
	[NFC_ATTR_SE_APDU] = { .type = NLA_BINARY },
	[NFC_ATTR_VENDOR_DATA] = { .type = NLA_BINARY },

};


static const struct nla_policy nfc_sdp_genl_policy[NFC_SDP_ATTR_MAX + 1] = {
	[NFC_SDP_ATTR_URI] = { .type = NLA_STRING },
	[NFC_SDP_ATTR_SAP] = { .type = NLA_U8 },
};



static int nfc_genl_send_target(struct sk_buff *msg, struct nfc_target *target,
				struct netlink_callback *cb, int flags)
{
	void *hdr;

	hdr = genlmsg_put(msg, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
			  &nfc_genl_family, flags, NFC_CMD_GET_TARGET);
	if (!hdr)
		return -EMSGSIZE;

	genl_dump_check_consistent(cb, hdr, &nfc_genl_family);

	if (nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target->idx) ||
	    nla_put_u32(msg, NFC_ATTR_PROTOCOLS, target->supported_protocols) ||
	    nla_put_u16(msg, NFC_ATTR_TARGET_SENS_RES, target->sens_res) ||
	    nla_put_u8(msg, NFC_ATTR_TARGET_SEL_RES, target->sel_res))
		goto nla_put_failure;
	if (target->nfcid1_len > 0 &&
	    nla_put(msg, NFC_ATTR_TARGET_NFCID1, target->nfcid1_len,
		    target->nfcid1))
		goto nla_put_failure;
	if (target->sensb_res_len > 0 &&
	    nla_put(msg, NFC_ATTR_TARGET_SENSB_RES, target->sensb_res_len,
		    target->sensb_res))
		goto nla_put_failure;
	if (target->sensf_res_len > 0 &&
	    nla_put(msg, NFC_ATTR_TARGET_SENSF_RES, target->sensf_res_len,
		    target->sensf_res))
		goto nla_put_failure;

	if (target->is_iso15693) {
		if (nla_put_u8(msg, NFC_ATTR_TARGET_ISO15693_DSFID,
			       target->iso15693_dsfid) ||
		    nla_put(msg, NFC_ATTR_TARGET_ISO15693_UID,
			    sizeof(target->iso15693_uid), target->iso15693_uid))
			goto nla_put_failure;
	}

	genlmsg_end(msg, hdr);
	return 0;

nla_put_failure:
	genlmsg_cancel(msg, hdr);
	return -EMSGSIZE;
}

Contributors
Person Tokens Prop Commits CommitProp
Lauro Ramos Venancio 131 48.88% 1 14.29%
Ilan Elias 60 22.39% 2 28.57%
Mark A. Greer 42 15.67% 1 14.29%
David S. Miller 31 11.57% 1 14.29%
Johannes Berg 3 1.12% 1 14.29%
Eric W. Biedermann 1 0.37% 1 14.29%
Total 268 100.00% 7 100.00%



static struct nfc_dev *__get_device_from_cb(struct netlink_callback *cb)
{
	struct nlattr **attrbuf = genl_family_attrbuf(&nfc_genl_family);
	struct nfc_dev *dev;
	int rc;
	u32 idx;

	rc = nlmsg_parse(cb->nlh, GENL_HDRLEN + nfc_genl_family.hdrsize,
			 attrbuf, nfc_genl_family.maxattr, nfc_genl_policy);
	if (rc < 0)
		return ERR_PTR(rc);

	if (!attrbuf[NFC_ATTR_DEVICE_INDEX])
		return ERR_PTR(-EINVAL);

	idx = nla_get_u32(attrbuf[NFC_ATTR_DEVICE_INDEX]);

	dev = nfc_get_device(idx);
	if (!dev)
		return ERR_PTR(-ENODEV);

	return dev;
}

Contributors
Person Tokens Prop Commits CommitProp
Lauro Ramos Venancio 106 89.83% 1 50.00%
Johannes Berg 12 10.17% 1 50.00%
Total 118 100.00% 2 100.00%



static int nfc_genl_dump_targets(struct sk_buff *skb,
				 struct netlink_callback *cb)
{
	int i = cb->args[0];
	struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
	int rc;

	if (!dev) {
		dev = __get_device_from_cb(cb);
		if (IS_ERR(dev))
			return PTR_ERR(dev);

		cb->args[1] = (long) dev;
	}

	device_lock(&dev->dev);

	cb->seq = dev->targets_generation;

	while (i < dev->n_targets) {
		rc = nfc_genl_send_target(skb, &dev->targets[i], cb,
					  NLM_F_MULTI);
		if (rc < 0)
			break;

		i++;
	}

	device_unlock(&dev->dev);

	cb->args[0] = i;

	return skb->len;
}

Contributors
Person Tokens Prop Commits CommitProp
Lauro Ramos Venancio 158 97.53% 1 50.00%
Eric Lapuyade 4 2.47% 1 50.00%
Total 162 100.00% 2 100.00%



static int nfc_genl_dump_targets_done(struct netlink_callback *cb)
{
	struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];

	if (dev)
		nfc_put_device(dev);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Lauro Ramos Venancio 40 100.00% 1 100.00%
Total 40 100.00% 1 100.00%



int nfc_genl_targets_found(struct nfc_dev *dev)
{
	struct sk_buff *msg;
	void *hdr;

	dev->genl_data.poll_req_portid = 0;

	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
	if (!msg)
		return -ENOMEM;

	hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
			  NFC_EVENT_TARGETS_FOUND);
	if (!hdr)
		goto free_msg;

	if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
		goto nla_put_failure;

	genlmsg_end(msg, hdr);

	return genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);

nla_put_failure:
	genlmsg_cancel(msg, hdr);
free_msg:
	nlmsg_free(msg);
	return -EMSGSIZE;
}

Contributors
Person Tokens Prop Commits CommitProp
Lauro Ramos Venancio 116 89.92% 1 16.67%
David S. Miller 7 5.43% 1 16.67%
Johannes Berg 4 3.10% 2 33.33%
Thomas Graf 1 0.78% 1 16.67%
Eric W. Biedermann 1 0.78% 1 16.67%
Total 129 100.00% 6 100.00%



int nfc_genl_target_lost(struct nfc_dev *dev, u32 target_idx)
{
	struct sk_buff *msg;
	void *hdr;

	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
	if (!msg)
		return -ENOMEM;

	hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
			  NFC_EVENT_TARGET_LOST);
	if (!hdr)
		goto free_msg;

	if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
	    nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
		goto nla_put_failure;

	genlmsg_end(msg, hdr);

	genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);

	return 0;

nla_put_failure:
	genlmsg_cancel(msg, hdr);
free_msg:
	nlmsg_free(msg);
	return -EMSGSIZE;
}

Contributors
Person Tokens Prop Commits CommitProp
Samuel Ortiz 122 89.71% 2 33.33%
John W. Linville 9 6.62% 1 16.67%
Johannes Berg 4 2.94% 2 33.33%
Thomas Graf 1 0.74% 1 16.67%
Total 136 100.00% 6 100.00%



int nfc_genl_tm_activated(struct nfc_dev *dev, u32 protocol)
{
	struct sk_buff *msg;
	void *hdr;

	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
	if (!msg)
		return -ENOMEM;

	hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
			  NFC_EVENT_TM_ACTIVATED);
	if (!hdr)
		goto free_msg;

	if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
		goto nla_put_failure;
	if (nla_put_u32(msg, NFC_ATTR_TM_PROTOCOLS, protocol))
		goto nla_put_failure;

	genlmsg_end(msg, hdr);

	genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);

	return 0;

nla_put_failure:
	genlmsg_cancel(msg, hdr);
free_msg:
	nlmsg_free(msg);
	return -EMSGSIZE;
}

Contributors
Person Tokens Prop Commits CommitProp
Samuel Ortiz 135 96.43% 1 25.00%
Johannes Berg 4 2.86% 2 50.00%
Thomas Graf 1 0.71% 1 25.00%
Total 140 100.00% 4 100.00%



int nfc_genl_tm_deactivated(struct nfc_dev *dev)
{
	struct sk_buff *msg;
	void *hdr;

	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
	if (!msg)
		return -ENOMEM;

	hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
			  NFC_EVENT_TM_DEACTIVATED);
	if (!hdr)
		goto free_msg;

	if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
		goto nla_put_failure;

	genlmsg_end(msg, hdr);

	genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);

	return 0;

nla_put_failure:
	genlmsg_cancel(msg, hdr);
free_msg:
	nlmsg_free(msg);
	return -EMSGSIZE;
}

Contributors
Person Tokens Prop Commits CommitProp
Samuel Ortiz 109 88.62% 2 33.33%
Lauro Ramos Venancio 9 7.32% 1 16.67%
Johannes Berg 4 3.25% 2 33.33%
Thomas Graf 1 0.81% 1 16.67%
Total 123 100.00% 6 100.00%



int nfc_genl_device_added(struct nfc_dev *dev)
{
	struct sk_buff *msg;
	void *hdr;

	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
	if (!msg)
		return -ENOMEM;

	hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
			  NFC_EVENT_DEVICE_ADDED);
	if (!hdr)
		goto free_msg;

	if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
	    nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
	    nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) ||
	    nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up))
		goto nla_put_failure;

	genlmsg_end(msg, hdr);

	genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);

	return 0;

nla_put_failure:
	genlmsg_cancel(msg, hdr);
free_msg:
	nlmsg_free(msg);
	return -EMSGSIZE;
}

Contributors
Person Tokens Prop Commits CommitProp
Lauro Ramos Venancio 130 82.80% 1 16.67%
David S. Miller 13 8.28% 1 16.67%
Samuel Ortiz 9 5.73% 1 16.67%
Johannes Berg 4 2.55% 2 33.33%
Thomas Graf 1 0.64% 1 16.67%
Total 157 100.00% 6 100.00%



int nfc_genl_device_removed(struct nfc_dev *dev)
{
	struct sk_buff *msg;
	void *hdr;

	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
	if (!msg)
		return -ENOMEM;

	hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
			  NFC_EVENT_DEVICE_REMOVED);
	if (!hdr)
		goto free_msg;

	if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
		goto nla_put_failure;

	genlmsg_end(msg, hdr);

	genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);

	return 0;

nla_put_failure:
	genlmsg_cancel(msg, hdr);
free_msg:
	nlmsg_free(msg);
	return -EMSGSIZE;
}

Contributors
Person Tokens Prop Commits CommitProp
Lauro Ramos Venancio 111 90.24% 1 20.00%
David S. Miller 7 5.69% 1 20.00%
Johannes Berg 4 3.25% 2 40.00%
Thomas Graf 1 0.81% 1 20.00%
Total 123 100.00% 5 100.00%



int nfc_genl_llc_send_sdres(struct nfc_dev *dev, struct hlist_head *sdres_list)
{
	struct sk_buff *msg;
	struct nlattr *sdp_attr, *uri_attr;
	struct nfc_llcp_sdp_tlv *sdres;
	struct hlist_node *n;
	void *hdr;
	int rc = -EMSGSIZE;
	int i;

	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
	if (!msg)
		return -ENOMEM;

	hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
			  NFC_EVENT_LLC_SDRES);
	if (!hdr)
		goto free_msg;

	if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
		goto nla_put_failure;

	sdp_attr = nla_nest_start(msg, NFC_ATTR_LLC_SDP);
	if (sdp_attr == NULL) {
		rc = -ENOMEM;
		goto nla_put_failure;
	}

	i = 1;
	hlist_for_each_entry_safe(sdres, n, sdres_list, node) {
		pr_debug("uri: %s, sap: %d\n", sdres->uri, sdres->sap);

		uri_attr = nla_nest_start(msg, i++);
		if (uri_attr == NULL) {
			rc = -ENOMEM;
			goto nla_put_failure;
		}

		if (nla_put_u8(msg, NFC_SDP_ATTR_SAP, sdres->sap))
			goto nla_put_failure;

		if (nla_put_string(msg, NFC_SDP_ATTR_URI, sdres->uri))
			goto nla_put_failure;

		nla_nest_end(msg, uri_attr);

		hlist_del(&sdres->node);

		nfc_llcp_free_sdp_tlv(sdres);
	}

	nla_nest_end(msg, sdp_attr);

	genlmsg_end(msg, hdr);

	return genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);

nla_put_failure:
	genlmsg_cancel(msg, hdr);

free_msg:
	nlmsg_free(msg);

	nfc_llcp_free_sdp_tlv_list(sdres_list);

	return rc;
}

Contributors
Person Tokens Prop Commits CommitProp
Thierry Escande 213 71.96% 2 25.00%
Lauro Ramos Venancio 64 21.62% 1 12.50%
Samuel Ortiz 10 3.38% 2 25.00%
David S. Miller 5 1.69% 1 12.50%
Johannes Berg 4 1.35% 2 25.00%
Total 296 100.00% 8 100.00%



int nfc_genl_se_added(struct nfc_dev *dev, u32 se_idx, u16 type)
{
	struct sk_buff *msg;
	void *hdr;

	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
	if (!msg)
		return -ENOMEM;

	hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
			  NFC_EVENT_SE_ADDED);
	if (!hdr)
		goto free_msg;

	if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
	    nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) ||
	    nla_put_u8(msg, NFC_ATTR_SE_TYPE, type))
		goto nla_put_failure;

	genlmsg_end(msg, hdr);

	genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);

	return 0;

nla_put_failure:
	genlmsg_cancel(msg, hdr);
free_msg:
	nlmsg_free(msg);
	return -EMSGSIZE;
}

Contributors
Person Tokens Prop Commits CommitProp
Samuel Ortiz 143 97.28% 1 33.33%
Johannes Berg 4 2.72% 2 66.67%
Total 147 100.00% 3 100.00%



int nfc_genl_se_removed(struct nfc_dev *dev, u32 se_idx)
{
	struct sk_buff *msg;
	void *hdr;

	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
	if (!msg)
		return -ENOMEM;

	hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
			  NFC_EVENT_SE_REMOVED);
	if (!hdr)
		goto free_msg;

	if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
	    nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx))
		goto nla_put_failure;

	genlmsg_end(msg, hdr);

	genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);

	return 0;

nla_put_failure:
	genlmsg_cancel(msg, hdr);
free_msg:
	nlmsg_free(msg);
	return -EMSGSIZE;
}

Contributors
Person Tokens Prop Commits CommitProp
Samuel Ortiz 131 97.04% 1 33.33%
Johannes Berg 4 2.96% 2 66.67%
Total 135 100.00% 3 100.00%



int nfc_genl_se_transaction(struct nfc_dev *dev, u8 se_idx,
			    struct nfc_evt_transaction *evt_transaction)
{
	struct nfc_se *se;
	struct sk_buff *msg;
	void *hdr;

	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
	if (!msg)
		return -ENOMEM;

	hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
			  NFC_EVENT_SE_TRANSACTION);
	if (!hdr)
		goto free_msg;

	se = nfc_find_se(dev, se_idx);
	if (!se)
		goto free_msg;

	if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
	    nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) ||
	    nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type) ||
	    nla_put(msg, NFC_ATTR_SE_AID, evt_transaction->aid_len,
		    evt_transaction->aid) ||
	    nla_put(msg, NFC_ATTR_SE_PARAMS, evt_transaction->params_len,
		    evt_transaction->params))
		goto nla_put_failure;

	/* evt_transaction is no more used */
	devm_kfree(&dev->dev, evt_transaction);

	genlmsg_end(msg, hdr);

	genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);

	return 0;

nla_put_failure:
	genlmsg_cancel(msg, hdr);
free_msg:
	/* evt_transaction is no more used */
	devm_kfree(&dev->dev, evt_transaction);
	nlmsg_free(msg);
	return -EMSGSIZE;
}

Contributors
Person Tokens Prop Commits CommitProp
Christophe Ricard 225 100.00% 1 100.00%
Total 225 100.00% 1 100.00%



int nfc_genl_se_connectivity(struct nfc_dev *dev, u8 se_idx)
{
	struct nfc_se *se;
	struct sk_buff *msg;
	void *hdr;

	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
	if (!msg)
		return -ENOMEM;

	hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
			  NFC_EVENT_SE_CONNECTIVITY);
	if (!hdr)
		goto free_msg;

	se = nfc_find_se(dev, se_idx);
	if (!se)
		goto free_msg;

	if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
	    nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) ||
	    nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type))
		goto nla_put_failure;

	genlmsg_end(msg, hdr);

	genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);

	return 0;

nla_put_failure:
	genlmsg_cancel(msg, hdr);
free_msg:
	nlmsg_free(msg);
	return -EMSGSIZE;
}

Contributors
Person Tokens Prop Commits CommitProp
Christophe Ricard 168 100.00% 1 100.00%
Total 168 100.00% 1 100.00%



static int nfc_genl_send_device(struct sk_buff *msg, struct nfc_dev *dev,
				u32 portid, u32 seq,
				struct netlink_callback *cb,
				int flags)
{
	void *hdr;

	hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags,
			  NFC_CMD_GET_DEVICE);
	if (!hdr)
		return -EMSGSIZE;

	if (cb)
		genl_dump_check_consistent(cb, hdr, &nfc_genl_family);

	if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
	    nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
	    nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) ||
	    nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up) ||
	    nla_put_u8(msg, NFC_ATTR_RF_MODE, dev->rf_mode))
		goto nla_put_failure;

	genlmsg_end(msg, hdr);
	return 0;

nla_put_failure:
	genlmsg_cancel(msg, hdr);
	return -EMSGSIZE;
}

Contributors
Person Tokens Prop Commits CommitProp
Thierry Escande 156 98.11% 1 50.00%
Johannes Berg 3 1.89% 1 50.00%
Total 159 100.00% 2 100.00%



static int nfc_genl_dump_devices(struct sk_buff *skb,
				 struct netlink_callback *cb)
{
	struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
	struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
	bool first_call = false;

	if (!iter) {
		first_call = true;
		iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL);
		if (!iter)
			return -ENOMEM;
		cb->args[0] = (long) iter;
	}

	mutex_lock(&nfc_devlist_mutex);

	cb->seq = nfc_devlist_generation;

	if (first_call) {
		nfc_device_iter_init(iter);
		dev = nfc_device_iter_next(iter);
	}

	while (dev) {
		int rc;

		rc = nfc_genl_send_device(skb, dev, NETLINK_CB(cb->skb).portid,
					  cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
		if (rc < 0)
			break;

		dev = nfc_device_iter_next(iter);
	}

	mutex_unlock(&nfc_devlist_mutex);

	cb->args[1] = (long) dev;

	return skb->len;
}

Contributors
Person Tokens Prop Commits CommitProp
Lauro Ramos Venancio 203 99.51% 1 50.00%
Eric W. Biedermann 1 0.49% 1 50.00%
Total 204 100.00% 2 100.00%



static int nfc_genl_dump_devices_done(struct netlink_callback *cb)
{
	struct class_dev_iter *iter
Person	Tokens	Prop	Commits	CommitProp
Lauro Ramos Venancio	131	48.88%	1	14.29%
Ilan Elias	60	22.39%	2	28.57%
Mark A. Greer	42	15.67%	1	14.29%
David S. Miller	31	11.57%	1	14.29%
Johannes Berg	3	1.12%	1	14.29%
Eric W. Biedermann	1	0.37%	1	14.29%
Total	268	100.00%	7	100.00%
cregit-Linux how code gets into the kernel

Release 4.11 net/nfc/netlink.c

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