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Diffstat (limited to 'net/nfc/netlink.c')
-rw-r--r--net/nfc/netlink.c179
1 files changed, 149 insertions, 30 deletions
diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c
index 03f8818e1f1..6989dfa28ee 100644
--- a/net/nfc/netlink.c
+++ b/net/nfc/netlink.c
@@ -21,6 +21,8 @@
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
+#define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
+
#include <net/genetlink.h>
#include <linux/nfc.h>
#include <linux/slab.h>
@@ -44,6 +46,8 @@ static const struct nla_policy nfc_genl_policy[NFC_ATTR_MAX + 1] = {
[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 },
};
static int nfc_genl_send_target(struct sk_buff *msg, struct nfc_target *target,
@@ -51,8 +55,6 @@ static int nfc_genl_send_target(struct sk_buff *msg, struct nfc_target *target,
{
void *hdr;
- nfc_dbg("entry");
-
hdr = genlmsg_put(msg, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq,
&nfc_genl_family, flags, NFC_CMD_GET_TARGET);
if (!hdr)
@@ -65,6 +67,9 @@ static int nfc_genl_send_target(struct sk_buff *msg, struct nfc_target *target,
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);
+ if (target->nfcid1_len > 0)
+ NLA_PUT(msg, NFC_ATTR_TARGET_NFCID1, target->nfcid1_len,
+ target->nfcid1);
return genlmsg_end(msg, hdr);
@@ -105,8 +110,6 @@ static int nfc_genl_dump_targets(struct sk_buff *skb,
struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
int rc;
- nfc_dbg("entry");
-
if (!dev) {
dev = __get_device_from_cb(cb);
if (IS_ERR(dev))
@@ -139,8 +142,6 @@ static int nfc_genl_dump_targets_done(struct netlink_callback *cb)
{
struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
- nfc_dbg("entry");
-
if (dev)
nfc_put_device(dev);
@@ -152,8 +153,6 @@ int nfc_genl_targets_found(struct nfc_dev *dev)
struct sk_buff *msg;
void *hdr;
- nfc_dbg("entry");
-
dev->genl_data.poll_req_pid = 0;
msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
@@ -183,8 +182,6 @@ int nfc_genl_device_added(struct nfc_dev *dev)
struct sk_buff *msg;
void *hdr;
- nfc_dbg("entry");
-
msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
@@ -216,8 +213,6 @@ int nfc_genl_device_removed(struct nfc_dev *dev)
struct sk_buff *msg;
void *hdr;
- nfc_dbg("entry");
-
msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
@@ -249,8 +244,6 @@ static int nfc_genl_send_device(struct sk_buff *msg, struct nfc_dev *dev,
{
void *hdr;
- nfc_dbg("entry");
-
hdr = genlmsg_put(msg, pid, seq, &nfc_genl_family, flags,
NFC_CMD_GET_DEVICE);
if (!hdr)
@@ -277,8 +270,6 @@ static int nfc_genl_dump_devices(struct sk_buff *skb,
struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
bool first_call = false;
- nfc_dbg("entry");
-
if (!iter) {
first_call = true;
iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL);
@@ -319,14 +310,81 @@ static int nfc_genl_dump_devices_done(struct netlink_callback *cb)
{
struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
- nfc_dbg("entry");
-
nfc_device_iter_exit(iter);
kfree(iter);
return 0;
}
+int nfc_genl_dep_link_up_event(struct nfc_dev *dev, u32 target_idx,
+ u8 comm_mode, u8 rf_mode)
+{
+ struct sk_buff *msg;
+ void *hdr;
+
+ pr_debug("DEP link is up\n");
+
+ msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
+ if (!msg)
+ return -ENOMEM;
+
+ hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
+ NFC_CMD_DEP_LINK_UP);
+ if (!hdr)
+ goto free_msg;
+
+ NLA_PUT_U32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx);
+ if (rf_mode == NFC_RF_INITIATOR)
+ NLA_PUT_U32(msg, NFC_ATTR_TARGET_INDEX, target_idx);
+ NLA_PUT_U8(msg, NFC_ATTR_COMM_MODE, comm_mode);
+ NLA_PUT_U8(msg, NFC_ATTR_RF_MODE, rf_mode);
+
+ genlmsg_end(msg, hdr);
+
+ dev->dep_link_up = true;
+
+ genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC);
+
+ return 0;
+
+nla_put_failure:
+ genlmsg_cancel(msg, hdr);
+free_msg:
+ nlmsg_free(msg);
+ return -EMSGSIZE;
+}
+
+int nfc_genl_dep_link_down_event(struct nfc_dev *dev)
+{
+ struct sk_buff *msg;
+ void *hdr;
+
+ pr_debug("DEP link is down\n");
+
+ msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
+ if (!msg)
+ return -ENOMEM;
+
+ hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
+ NFC_CMD_DEP_LINK_DOWN);
+ if (!hdr)
+ goto free_msg;
+
+ NLA_PUT_U32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx);
+
+ genlmsg_end(msg, hdr);
+
+ genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC);
+
+ return 0;
+
+nla_put_failure:
+ genlmsg_cancel(msg, hdr);
+free_msg:
+ nlmsg_free(msg);
+ return -EMSGSIZE;
+}
+
static int nfc_genl_get_device(struct sk_buff *skb, struct genl_info *info)
{
struct sk_buff *msg;
@@ -334,8 +392,6 @@ static int nfc_genl_get_device(struct sk_buff *skb, struct genl_info *info)
u32 idx;
int rc = -ENOBUFS;
- nfc_dbg("entry");
-
if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
return -EINVAL;
@@ -373,8 +429,6 @@ static int nfc_genl_dev_up(struct sk_buff *skb, struct genl_info *info)
int rc;
u32 idx;
- nfc_dbg("entry");
-
if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
return -EINVAL;
@@ -396,8 +450,6 @@ static int nfc_genl_dev_down(struct sk_buff *skb, struct genl_info *info)
int rc;
u32 idx;
- nfc_dbg("entry");
-
if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
return -EINVAL;
@@ -420,7 +472,7 @@ static int nfc_genl_start_poll(struct sk_buff *skb, struct genl_info *info)
u32 idx;
u32 protocols;
- nfc_dbg("entry");
+ pr_debug("Poll start\n");
if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
!info->attrs[NFC_ATTR_PROTOCOLS])
@@ -451,8 +503,6 @@ static int nfc_genl_stop_poll(struct sk_buff *skb, struct genl_info *info)
int rc;
u32 idx;
- nfc_dbg("entry");
-
if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
return -EINVAL;
@@ -478,6 +528,67 @@ out:
return rc;
}
+static int nfc_genl_dep_link_up(struct sk_buff *skb, struct genl_info *info)
+{
+ struct nfc_dev *dev;
+ int rc, tgt_idx;
+ u32 idx;
+ u8 comm, rf;
+
+ pr_debug("DEP link up\n");
+
+ if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
+ !info->attrs[NFC_ATTR_COMM_MODE] ||
+ !info->attrs[NFC_ATTR_RF_MODE])
+ return -EINVAL;
+
+ idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
+ if (!info->attrs[NFC_ATTR_TARGET_INDEX])
+ tgt_idx = NFC_TARGET_IDX_ANY;
+ else
+ tgt_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
+
+ comm = nla_get_u8(info->attrs[NFC_ATTR_COMM_MODE]);
+ rf = nla_get_u8(info->attrs[NFC_ATTR_RF_MODE]);
+
+ if (comm != NFC_COMM_ACTIVE && comm != NFC_COMM_PASSIVE)
+ return -EINVAL;
+
+ if (rf != NFC_RF_INITIATOR && comm != NFC_RF_TARGET)
+ return -EINVAL;
+
+ dev = nfc_get_device(idx);
+ if (!dev)
+ return -ENODEV;
+
+ rc = nfc_dep_link_up(dev, tgt_idx, comm, rf);
+
+ nfc_put_device(dev);
+
+ return rc;
+}
+
+static int nfc_genl_dep_link_down(struct sk_buff *skb, struct genl_info *info)
+{
+ struct nfc_dev *dev;
+ int rc;
+ u32 idx;
+
+ if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
+ return -EINVAL;
+
+ idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
+
+ dev = nfc_get_device(idx);
+ if (!dev)
+ return -ENODEV;
+
+ rc = nfc_dep_link_down(dev);
+
+ nfc_put_device(dev);
+ return rc;
+}
+
static struct genl_ops nfc_genl_ops[] = {
{
.cmd = NFC_CMD_GET_DEVICE,
@@ -507,6 +618,16 @@ static struct genl_ops nfc_genl_ops[] = {
.policy = nfc_genl_policy,
},
{
+ .cmd = NFC_CMD_DEP_LINK_UP,
+ .doit = nfc_genl_dep_link_up,
+ .policy = nfc_genl_policy,
+ },
+ {
+ .cmd = NFC_CMD_DEP_LINK_DOWN,
+ .doit = nfc_genl_dep_link_down,
+ .policy = nfc_genl_policy,
+ },
+ {
.cmd = NFC_CMD_GET_TARGET,
.dumpit = nfc_genl_dump_targets,
.done = nfc_genl_dump_targets_done,
@@ -524,18 +645,16 @@ static int nfc_genl_rcv_nl_event(struct notifier_block *this,
if (event != NETLINK_URELEASE || n->protocol != NETLINK_GENERIC)
goto out;
- nfc_dbg("NETLINK_URELEASE event from id %d", n->pid);
+ pr_debug("NETLINK_URELEASE event from id %d\n", n->pid);
nfc_device_iter_init(&iter);
dev = nfc_device_iter_next(&iter);
while (dev) {
- mutex_lock(&dev->genl_data.genl_data_mutex);
if (dev->genl_data.poll_req_pid == n->pid) {
nfc_stop_poll(dev);
dev->genl_data.poll_req_pid = 0;
}
- mutex_unlock(&dev->genl_data.genl_data_mutex);
dev = nfc_device_iter_next(&iter);
}