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authorSamuel Ortiz <sameo@linux.intel.com>2013-05-10 15:47:37 +0200
committerSamuel Ortiz <sameo@linux.intel.com>2013-06-14 13:44:59 +0200
commit2757c3723c3d2b13e3a8bfaa034826f64e9cca43 (patch)
tree05a2c978fc9edbc973f1f6b55afbddf6ccb79f55 /net/nfc
parentfed7c25ec0d4894edfc36bbe5c5231e52f45483a (diff)
NFC: Send netlink events for secure elements additions and removals
When an NFC driver or host controller stack discovers a secure element, it will call nfc_add_se(). In order for userspace applications to use these secure elements, a netlink event will then be sent with the SE index and its type. With that information userspace applications can decide wether or not to enable SEs, through their indexes. Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'net/nfc')
-rw-r--r--net/nfc/core.c14
-rw-r--r--net/nfc/netlink.c63
-rw-r--r--net/nfc/nfc.h3
3 files changed, 80 insertions, 0 deletions
diff --git a/net/nfc/core.c b/net/nfc/core.c
index dacadfbcacea..bb5f16cfc201 100644
--- a/net/nfc/core.c
+++ b/net/nfc/core.c
@@ -763,6 +763,7 @@ EXPORT_SYMBOL(nfc_driver_failure);
int nfc_add_se(struct nfc_dev *dev, u32 se_idx, u16 type)
{
struct nfc_se *se, *n;
+ int rc;
pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx);
@@ -781,6 +782,14 @@ int nfc_add_se(struct nfc_dev *dev, u32 se_idx, u16 type)
list_add(&se->list, &dev->secure_elements);
+ rc = nfc_genl_se_added(dev, se_idx, type);
+ if (rc < 0) {
+ list_del(&se->list);
+ kfree(se);
+
+ return rc;
+ }
+
return 0;
}
EXPORT_SYMBOL(nfc_add_se);
@@ -788,11 +797,16 @@ EXPORT_SYMBOL(nfc_add_se);
int nfc_remove_se(struct nfc_dev *dev, u32 se_idx)
{
struct nfc_se *se, *n;
+ int rc;
pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx);
list_for_each_entry_safe(se, n, &dev->secure_elements, list)
if (se->idx == se_idx) {
+ rc = nfc_genl_se_removed(dev, se_idx);
+ if (rc < 0)
+ return rc;
+
list_del(&se->list);
kfree(se);
diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c
index fdbc662c564a..8a11a3a27e69 100644
--- a/net/nfc/netlink.c
+++ b/net/nfc/netlink.c
@@ -426,6 +426,69 @@ free_msg:
return rc;
}
+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(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_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(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;
+}
+
static int nfc_genl_send_device(struct sk_buff *msg, struct nfc_dev *dev,
u32 portid, u32 seq,
struct netlink_callback *cb,
diff --git a/net/nfc/nfc.h b/net/nfc/nfc.h
index cf0c48165996..a6aeee094aa4 100644
--- a/net/nfc/nfc.h
+++ b/net/nfc/nfc.h
@@ -94,6 +94,9 @@ int nfc_genl_tm_deactivated(struct nfc_dev *dev);
int nfc_genl_llc_send_sdres(struct nfc_dev *dev, struct hlist_head *sdres_list);
+int nfc_genl_se_added(struct nfc_dev *dev, u32 se_idx, u16 type);
+int nfc_genl_se_removed(struct nfc_dev *dev, u32 se_idx);
+
struct nfc_dev *nfc_get_device(unsigned int idx);
static inline void nfc_put_device(struct nfc_dev *dev)

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