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Diffstat (limited to 'net/nfc/netlink.c')
-rw-r--r--net/nfc/netlink.c104
1 files changed, 93 insertions, 11 deletions
diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c
index 581d419083aa..4c51714ee741 100644
--- a/net/nfc/netlink.c
+++ b/net/nfc/netlink.c
@@ -49,6 +49,8 @@ static const struct nla_policy nfc_genl_policy[NFC_ATTR_MAX + 1] = {
[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 },
};
static int nfc_genl_send_target(struct sk_buff *msg, struct nfc_target *target,
@@ -165,7 +167,7 @@ int nfc_genl_targets_found(struct nfc_dev *dev)
dev->genl_data.poll_req_pid = 0;
- msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
if (!msg)
return -ENOMEM;
@@ -193,7 +195,7 @@ int nfc_genl_target_lost(struct nfc_dev *dev, u32 target_idx)
struct sk_buff *msg;
void *hdr;
- msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
@@ -219,12 +221,74 @@ free_msg:
return -EMSGSIZE;
}
+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(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL);
+
+ return 0;
+
+nla_put_failure:
+ genlmsg_cancel(msg, hdr);
+free_msg:
+ nlmsg_free(msg);
+ return -EMSGSIZE;
+}
+
+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(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL);
+
+ return 0;
+
+nla_put_failure:
+ genlmsg_cancel(msg, hdr);
+free_msg:
+ nlmsg_free(msg);
+ return -EMSGSIZE;
+}
+
int nfc_genl_device_added(struct nfc_dev *dev)
{
struct sk_buff *msg;
void *hdr;
- msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
@@ -257,7 +321,7 @@ int nfc_genl_device_removed(struct nfc_dev *dev)
struct sk_buff *msg;
void *hdr;
- msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
@@ -370,7 +434,7 @@ int nfc_genl_dep_link_up_event(struct nfc_dev *dev, u32 target_idx,
pr_debug("DEP link is up\n");
- msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
if (!msg)
return -ENOMEM;
@@ -409,7 +473,7 @@ int nfc_genl_dep_link_down_event(struct nfc_dev *dev)
pr_debug("DEP link is down\n");
- msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
if (!msg)
return -ENOMEM;
@@ -450,7 +514,7 @@ static int nfc_genl_get_device(struct sk_buff *skb, struct genl_info *info)
if (!dev)
return -ENODEV;
- msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg) {
rc = -ENOMEM;
goto out_putdev;
@@ -519,16 +583,25 @@ static int nfc_genl_start_poll(struct sk_buff *skb, struct genl_info *info)
struct nfc_dev *dev;
int rc;
u32 idx;
- u32 protocols;
+ u32 im_protocols = 0, tm_protocols = 0;
pr_debug("Poll start\n");
if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
- !info->attrs[NFC_ATTR_PROTOCOLS])
+ ((!info->attrs[NFC_ATTR_IM_PROTOCOLS] &&
+ !info->attrs[NFC_ATTR_PROTOCOLS]) &&
+ !info->attrs[NFC_ATTR_TM_PROTOCOLS]))
return -EINVAL;
idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
- protocols = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]);
+
+ if (info->attrs[NFC_ATTR_TM_PROTOCOLS])
+ tm_protocols = nla_get_u32(info->attrs[NFC_ATTR_TM_PROTOCOLS]);
+
+ if (info->attrs[NFC_ATTR_IM_PROTOCOLS])
+ im_protocols = nla_get_u32(info->attrs[NFC_ATTR_IM_PROTOCOLS]);
+ else if (info->attrs[NFC_ATTR_PROTOCOLS])
+ im_protocols = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]);
dev = nfc_get_device(idx);
if (!dev)
@@ -536,7 +609,7 @@ static int nfc_genl_start_poll(struct sk_buff *skb, struct genl_info *info)
mutex_lock(&dev->genl_data.genl_data_mutex);
- rc = nfc_start_poll(dev, protocols);
+ rc = nfc_start_poll(dev, im_protocols, tm_protocols);
if (!rc)
dev->genl_data.poll_req_pid = info->snd_pid;
@@ -561,6 +634,15 @@ static int nfc_genl_stop_poll(struct sk_buff *skb, struct genl_info *info)
if (!dev)
return -ENODEV;
+ device_lock(&dev->dev);
+
+ if (!dev->polling) {
+ device_unlock(&dev->dev);
+ return -EINVAL;
+ }
+
+ device_unlock(&dev->dev);
+
mutex_lock(&dev->genl_data.genl_data_mutex);
if (dev->genl_data.poll_req_pid != info->snd_pid) {
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