int nfc_genl_device_added(struct nfc_dev *dev)
{
struct sk_buff *msg;
void *hdr;
msg = nlmsg_new(NLMSG_GOODSIZE, 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;
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);
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_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;
}
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;
}
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;
}
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;
}
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;
}
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 (nfc_genl_setup_device_added(dev, msg))
goto nla_put_failure;
genlmsg_end(msg, hdr);
genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
return 0;
nla_put_failure:
free_msg:
nlmsg_free(msg);
return -EMSGSIZE;
}
/* This is called when we haven't heard from the node with MAC address addr for
* some time (just before the node is removed from the node table/list).
*/
void hsr_nl_nodedown(struct hsr_priv *hsr, unsigned char addr[ETH_ALEN])
{
struct sk_buff *skb;
void *msg_head;
struct hsr_port *master;
int res;
skb = genlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
if (!skb)
goto fail;
msg_head = genlmsg_put(skb, 0, 0, &hsr_genl_family, 0, HSR_C_NODE_DOWN);
if (!msg_head)
goto nla_put_failure;
res = nla_put(skb, HSR_A_NODE_ADDR, ETH_ALEN, addr);
if (res < 0)
goto nla_put_failure;
genlmsg_end(skb, msg_head);
genlmsg_multicast(&hsr_genl_family, skb, 0, 0, GFP_ATOMIC);
return;
nla_put_failure:
kfree_skb(skb);
fail:
rcu_read_lock();
master = hsr_port_get_hsr(hsr, HSR_PT_MASTER);
netdev_warn(master->dev, "Could not send HSR node down\n");
rcu_read_unlock();
}
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;
}
void ptp_work_send_rtc_change(struct work_struct *work) {
struct ptp_device *ptp = container_of(work, struct ptp_device, work_send_rtc_change);
struct sk_buff *skb;
uint8_t commandByte;
void *msgHead;
int returnValue = 0;
skb = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
if(skb == NULL) return;
/* Decide which command byte to send with the message based upon the lock state */
if(ptp->rtcLockState == PTP_RTC_LOCKED) {
commandByte = PTP_EVENTS_C_RTC_LOCK;
} else {
commandByte = PTP_EVENTS_C_RTC_UNLOCK;
}
/* Create the message headers */
msgHead = genlmsg_put(skb,
0,
ptp->netlinkSequence++,
&ptp_events_genl_family,
0,
commandByte);
if(msgHead == NULL) {
returnValue = -ENOMEM;
goto rtc_change_fail;
}
/* Write the PTP domain identifier to the message */
returnValue = nla_put_u8(skb, PTP_EVENTS_A_DOMAIN, ptp->properties.domainNumber);
if(returnValue != 0) goto rtc_change_fail;
/* Finalize the message and multicast it */
genlmsg_end(skb, msgHead);
returnValue = genlmsg_multicast(skb, 0, rtc_mcast.id, GFP_ATOMIC);
skb = NULL;
switch(returnValue) {
case 0:
case -ESRCH:
// Success or no process was listening, simply break
break;
default:
// This is an actual error, print the return code
printk(KERN_INFO DRIVER_NAME ": Failure delivering multicast Netlink message: %d\n",
returnValue);
goto rtc_change_fail;
}
rtc_change_fail:
if (NULL != skb) {
nlmsg_free(skb);
skb = NULL;
}
}
void quota_send_warning(struct kqid qid, dev_t dev,
const char warntype)
{
static atomic_t seq;
struct sk_buff *skb;
void *msg_head;
int ret;
int msg_size = 4 * nla_total_size(sizeof(u32)) +
2 * nla_total_size(sizeof(u64));
/* We have to allocate using GFP_NOFS as we are called from a
* filesystem performing write and thus further recursion into
* the fs to free some data could cause deadlocks. */
skb = genlmsg_new(msg_size, GFP_NOFS);
if (!skb) {
printk(KERN_ERR
"VFS: Not enough memory to send quota warning.\n");
return;
}
msg_head = genlmsg_put(skb, 0, atomic_add_return(1, &seq),
"a_genl_family, 0, QUOTA_NL_C_WARNING);
if (!msg_head) {
printk(KERN_ERR
"VFS: Cannot store netlink header in quota warning.\n");
goto err_out;
}
ret = nla_put_u32(skb, QUOTA_NL_A_QTYPE, qid.type);
if (ret)
goto attr_err_out;
ret = nla_put_u64(skb, QUOTA_NL_A_EXCESS_ID,
from_kqid_munged(&init_user_ns, qid));
if (ret)
goto attr_err_out;
ret = nla_put_u32(skb, QUOTA_NL_A_WARNING, warntype);
if (ret)
goto attr_err_out;
ret = nla_put_u32(skb, QUOTA_NL_A_DEV_MAJOR, MAJOR(dev));
if (ret)
goto attr_err_out;
ret = nla_put_u32(skb, QUOTA_NL_A_DEV_MINOR, MINOR(dev));
if (ret)
goto attr_err_out;
ret = nla_put_u64(skb, QUOTA_NL_A_CAUSED_ID,
from_kuid_munged(&init_user_ns, current_uid()));
if (ret)
goto attr_err_out;
genlmsg_end(skb, msg_head);
genlmsg_multicast("a_genl_family, skb, 0, 0, GFP_NOFS);
return;
attr_err_out:
printk(KERN_ERR "VFS: Not enough space to compose quota message!\n");
err_out:
kfree_skb(skb);
}
void quota_send_warning(short type, unsigned int id, dev_t dev,
const char warntype)
{
static atomic_t seq;
struct sk_buff *skb;
void *msg_head;
int ret;
int msg_size = 4 * nla_total_size(sizeof(u32)) +
2 * nla_total_size(sizeof(u64));
/*
*/
skb = genlmsg_new(msg_size, GFP_NOFS);
if (!skb) {
printk(KERN_ERR
"VFS: Not enough memory to send quota warning.\n");
return;
}
msg_head = genlmsg_put(skb, 0, atomic_add_return(1, &seq),
"a_genl_family, 0, QUOTA_NL_C_WARNING);
if (!msg_head) {
printk(KERN_ERR
"VFS: Cannot store netlink header in quota warning.\n");
goto err_out;
}
ret = nla_put_u32(skb, QUOTA_NL_A_QTYPE, type);
if (ret)
goto attr_err_out;
ret = nla_put_u64(skb, QUOTA_NL_A_EXCESS_ID, id);
if (ret)
goto attr_err_out;
ret = nla_put_u32(skb, QUOTA_NL_A_WARNING, warntype);
if (ret)
goto attr_err_out;
ret = nla_put_u32(skb, QUOTA_NL_A_DEV_MAJOR, MAJOR(dev));
if (ret)
goto attr_err_out;
ret = nla_put_u32(skb, QUOTA_NL_A_DEV_MINOR, MINOR(dev));
if (ret)
goto attr_err_out;
ret = nla_put_u64(skb, QUOTA_NL_A_CAUSED_ID, current_uid());
if (ret)
goto attr_err_out;
genlmsg_end(skb, msg_head);
genlmsg_multicast(skb, 0, quota_genl_family.id, GFP_NOFS);
return;
attr_err_out:
printk(KERN_ERR "VFS: Not enough space to compose quota message!\n");
err_out:
kfree_skb(skb);
}
int ieee802154_nl_mcast(struct sk_buff *msg, unsigned int group)
{
/* XXX: nlh is right at the start of msg */
void *hdr = genlmsg_data(NLMSG_DATA(msg->data));
if (genlmsg_end(msg, hdr) < 0)
goto out;
return genlmsg_multicast(msg, 0, group, GFP_ATOMIC);
out:
nlmsg_free(msg);
return -ENOBUFS;
}
int wimax_msg_send(struct wimax_dev *wimax_dev, struct sk_buff *skb)
{
struct device *dev = wimax_dev_to_dev(wimax_dev);
void *msg = skb->data;
size_t size = skb->len;
might_sleep();
d_printf(1, dev, "CTX: wimax msg, %zu bytes\n", size);
d_dump(2, dev, msg, size);
genlmsg_multicast(skb, 0, wimax_gnl_mcg.id, GFP_KERNEL);
d_printf(1, dev, "CTX: genl multicast done\n");
return 0;
}
int ieee802154_nl_mcast(struct sk_buff *msg, unsigned int group)
{
struct nlmsghdr *nlh = nlmsg_hdr(msg);
void *hdr = genlmsg_data(nlmsg_data(nlh));
if (genlmsg_end(msg, hdr) < 0)
goto out;
return genlmsg_multicast(&nl802154_family, msg, 0, group, GFP_ATOMIC);
out:
nlmsg_free(msg);
return -ENOBUFS;
}
static int ieee802154_nl_finish(struct sk_buff *msg)
{
/* XXX: nlh is right at the start of msg */
void *hdr = genlmsg_data(NLMSG_DATA(msg->data));
if (!genlmsg_end(msg, hdr))
goto out;
return genlmsg_multicast(msg, 0, ieee802154_coord_mcgrp.id,
GFP_ATOMIC);
out:
nlmsg_free(msg);
return -ENOBUFS;
}
static struct sk_buff *brc_send_command(struct sk_buff *request,
struct nlattr **attrs)
{
unsigned long int flags;
struct sk_buff *reply;
int error;
mutex_lock(&brc_serial);
/* Increment sequence number first, so that we ignore any replies
* to stale requests. */
spin_lock_irqsave(&brc_lock, flags);
nlmsg_hdr(request)->nlmsg_seq = ++brc_seq;
INIT_COMPLETION(brc_done);
spin_unlock_irqrestore(&brc_lock, flags);
nlmsg_end(request, nlmsg_hdr(request));
/* Send message. */
error = genlmsg_multicast(request, 0, brc_mc_group.id, GFP_KERNEL);
if (error < 0)
goto error;
/* Wait for reply. */
error = -ETIMEDOUT;
if (!wait_for_completion_timeout(&brc_done, BRC_TIMEOUT)) {
pr_warn("timed out waiting for userspace\n");
goto error;
}
/* Grab reply. */
spin_lock_irqsave(&brc_lock, flags);
reply = brc_reply;
brc_reply = NULL;
spin_unlock_irqrestore(&brc_lock, flags);
mutex_unlock(&brc_serial);
/* Re-parse message. Can't fail, since it parsed correctly once
* already. */
error = nlmsg_parse(nlmsg_hdr(reply), GENL_HDRLEN,
attrs, BRC_GENL_A_MAX, brc_genl_policy);
WARN_ON(error);
return reply;
error:
mutex_unlock(&brc_serial);
return ERR_PTR(error);
}
/**
* wimax_msg_send - Send a pre-allocated message to user space
*
* @wimax_dev: WiMAX device descriptor
*
* @skb: &struct sk_buff returned by wimax_msg_alloc(). Note the
* ownership of @skb is transferred to this function.
*
* Returns: 0 if ok, < 0 errno code on error
*
* Description:
*
* Sends a free-form message that was preallocated with
* wimax_msg_alloc() and filled up.
*
* Assumes that once you pass an skb to this function for sending, it
* owns it and will release it when done (on success).
*
* IMPORTANT:
*
* Don't use skb_push()/skb_pull()/skb_reserve() on the skb, as
* wimax_msg_send() depends on skb->data being placed at the
* beginning of the user message.
*/
int wimax_msg_send(struct wimax_dev *wimax_dev, struct sk_buff *skb)
{
int result;
struct device *dev = wimax_dev->net_dev->dev.parent;
void *msg = skb->data;
size_t size = skb->len;
might_sleep();
d_printf(1, dev, "CTX: wimax msg, %zu bytes\n", size);
d_dump(2, dev, msg, size);
result = genlmsg_multicast(skb, 0, wimax_gnl_mcg.id, GFP_KERNEL);
d_printf(1, dev, "CTX: genl multicast result %d\n", result);
if (result == -ESRCH) /* Nobody connected, ignore it */
result = 0; /* btw, the skb is freed already */
return result;
}
/*
* Send a Report State Change message (as created with _alloc).
*
* @report_skb: as returned by wimax_gnl_re_state_change_alloc()
* @header: as returned by wimax_gnl_re_state_change_alloc()
*
* Returns: 0 if ok, < 0 errno code on error.
*
* If the message is NULL, pretend it didn't happen.
*/
static
int wimax_gnl_re_state_change_send(
struct wimax_dev *wimax_dev, struct sk_buff *report_skb,
void *header)
{
int result = 0;
struct device *dev = wimax_dev_to_dev(wimax_dev);
d_fnstart(3, dev, "(wimax_dev %p report_skb %p)\n",
wimax_dev, report_skb);
if (report_skb == NULL) {
result = -ENOMEM;
goto out;
}
genlmsg_end(report_skb, header);
genlmsg_multicast(&wimax_gnl_family, report_skb, 0, 0, GFP_KERNEL);
out:
d_fnend(3, dev, "(wimax_dev %p report_skb %p) = %d\n",
wimax_dev, report_skb, result);
return result;
}
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_DEFAULT_SIZE, 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;
if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
goto nla_put_failure;
if (rf_mode == NFC_RF_INITIATOR &&
nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
goto nla_put_failure;
if (nla_put_u8(msg, NFC_ATTR_COMM_MODE, comm_mode) ||
nla_put_u8(msg, NFC_ATTR_RF_MODE, rf_mode))
goto nla_put_failure;
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;
}
/* This is called if for some node with MAC address addr, we only get frames
* over one of the slave interfaces. This would indicate an open network ring
* (i.e. a link has failed somewhere).
*/
void hsr_nl_ringerror(struct hsr_priv *hsr, unsigned char addr[ETH_ALEN],
struct hsr_port *port)
{
struct sk_buff *skb;
void *msg_head;
struct hsr_port *master;
int res;
skb = genlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
if (!skb)
goto fail;
msg_head = genlmsg_put(skb, 0, 0, &hsr_genl_family, 0, HSR_C_RING_ERROR);
if (!msg_head)
goto nla_put_failure;
res = nla_put(skb, HSR_A_NODE_ADDR, ETH_ALEN, addr);
if (res < 0)
goto nla_put_failure;
res = nla_put_u32(skb, HSR_A_IFINDEX, port->dev->ifindex);
if (res < 0)
goto nla_put_failure;
genlmsg_end(skb, msg_head);
genlmsg_multicast(&hsr_genl_family, skb, 0, 0, GFP_ATOMIC);
return;
nla_put_failure:
kfree_skb(skb);
fail:
rcu_read_lock();
master = hsr_port_get_hsr(hsr, HSR_PT_MASTER);
netdev_warn(master->dev, "Could not send HSR ring error message\n");
rcu_read_unlock();
}
/*
* Send a Report State Change message (as created with _alloc).
*
* @report_skb: as returned by wimax_gnl_re_state_change_alloc()
* @header: as returned by wimax_gnl_re_state_change_alloc()
*
* Returns: 0 if ok, < 0 errno code on error.
*
* If the message is NULL, pretend it didn't happen.
*/
static
int wimax_gnl_re_state_change_send(
struct wimax_dev *wimax_dev, struct sk_buff *report_skb,
void *header)
{
int result = 0;
struct device *dev = wimax_dev_to_dev(wimax_dev);
d_fnstart(3, dev, "(wimax_dev %p report_skb %p)\n",
wimax_dev, report_skb);
if (report_skb == NULL)
goto out;
genlmsg_end(report_skb, header);
result = genlmsg_multicast(report_skb, 0, wimax_gnl_mcg.id, GFP_KERNEL);
if (result == -ESRCH) /* Nobody connected, ignore it */
result = 0; /* btw, the skb is freed already */
if (result < 0) {
dev_err(dev, "RE_STCH: Error sending: %d\n", result);
nlmsg_free(report_skb);
}
out:
d_fnend(3, dev, "(wimax_dev %p report_skb %p) = %d\n",
wimax_dev, report_skb, result);
return result;
}
s32
wl_genl_send_msg(
struct net_device *ndev,
u32 event_type,
u8 *buf,
u16 len,
u8 *subhdr,
u16 subhdr_len)
{
int ret = 0;
struct sk_buff *skb;
void *msg;
u32 attr_type = 0;
bcm_event_hdr_t *hdr = NULL;
int mcast = 1; /* By default sent as mutlicast type */
int pid = 0;
u8 *ptr = NULL, *p = NULL;
u32 tot_len = sizeof(bcm_event_hdr_t) + subhdr_len + len;
u16 kflags = in_atomic() ? GFP_ATOMIC : GFP_KERNEL;
WL_DBG(("Enter \n"));
/* Decide between STRING event and Data event */
if (event_type == 0)
attr_type = BCM_GENL_ATTR_STRING;
else
attr_type = BCM_GENL_ATTR_MSG;
skb = genlmsg_new(NLMSG_GOODSIZE, kflags);
if (skb == NULL) {
ret = -ENOMEM;
goto out;
}
msg = genlmsg_put(skb, 0, 0, &wl_genl_family, 0, BCM_GENL_CMD_MSG);
if (msg == NULL) {
ret = -ENOMEM;
goto out;
}
if (attr_type == BCM_GENL_ATTR_STRING) {
/* Add a BCM_GENL_MSG attribute. Since it is specified as a string.
* make sure it is null terminated
*/
if (subhdr || subhdr_len) {
WL_ERR(("No sub hdr support for the ATTR STRING type \n"));
ret = -EINVAL;
goto out;
}
ret = nla_put_string(skb, BCM_GENL_ATTR_STRING, buf);
if (ret != 0) {
WL_ERR(("nla_put_string failed\n"));
goto out;
}
} else {
/* ATTR_MSG */
/* Create a single buffer for all */
p = ptr = kzalloc(tot_len, kflags);
if (!ptr) {
ret = -ENOMEM;
WL_ERR(("ENOMEM!!\n"));
goto out;
}
/* Include the bcm event header */
hdr = (bcm_event_hdr_t *)ptr;
hdr->event_type = wl_event_to_bcm_event(event_type);
hdr->len = len + subhdr_len;
ptr += sizeof(bcm_event_hdr_t);
/* Copy subhdr (if any) */
if (subhdr && subhdr_len) {
memcpy(ptr, subhdr, subhdr_len);
ptr += subhdr_len;
}
/* Copy the data */
if (buf && len) {
memcpy(ptr, buf, len);
}
ret = nla_put(skb, BCM_GENL_ATTR_MSG, tot_len, p);
if (ret != 0) {
WL_ERR(("nla_put_string failed\n"));
goto out;
}
}
if (mcast) {
int err = 0;
/* finalize the message */
genlmsg_end(skb, msg);
/* NETLINK_CB(skb).dst_group = 1; */
if ((err = genlmsg_multicast(skb, 0, wl_genl_mcast.id, GFP_ATOMIC)) < 0)
WL_ERR(("genlmsg_multicast for attr(%d) failed. Error:%d \n",
attr_type, err));
else
WL_DBG(("Multicast msg sent successfully. attr_type:%d len:%d \n",
attr_type, tot_len));
} else {
NETLINK_CB(skb).dst_group = 0; /* Not in multicast group */
/* finalize the message */
genlmsg_end(skb, msg);
/* send the message back */
if (genlmsg_unicast(&init_net, skb, pid) < 0)
WL_ERR(("genlmsg_unicast failed\n"));
}
out:
if (p)
kfree(p);
if (ret)
nlmsg_free(skb);
return ret;
}
void ptp_work_send_gm_change(struct work_struct *work) {
struct ptp_device *ptp = container_of(work, struct ptp_device, work_send_gm_change);
struct sk_buff *skb;
struct nlattr *valueMap;
int32_t pairIndex;
uint8_t *gmIdentity;
char gmIdentityString[NEW_GM_BUF_SIZE];
void *msgHead;
int returnValue = 0;
skb = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
if(skb == NULL) return;
/* Create the message headers */
msgHead = genlmsg_put(skb,
0,
ptp->netlinkSequence++,
&ptp_events_genl_family,
0,
PTP_EVENTS_C_GM_CHANGE);
if(msgHead == NULL) {
returnValue = -ENOMEM;
goto gm_change_fail;
}
/* Write the PTP domain identifier to the message */
returnValue = nla_put_u8(skb, PTP_EVENTS_A_DOMAIN, ptp->properties.domainNumber);
if(returnValue != 0) goto gm_change_fail;
/* Put a single entry into a key / value map to communicate the new Grandmaster */
valueMap = nla_nest_start(skb, PTP_EVENTS_A_VALUEMAP);
if(valueMap == NULL) goto gm_change_fail;
/* Place the length of the map, then the key / value strings */
nla_put_u32(skb, PTP_VALUEMAP_A_LENGTH, 1);
pairIndex = PTP_VALUEMAP_A_PAIRS;
/* Capture the Grandmaster identity as a string value */
gmIdentity = ptp->gmPriority->rootSystemIdentity.clockIdentity;
snprintf(gmIdentityString, NEW_GM_BUF_SIZE, "%s:%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X",
NEW_GM_KEY_STRING,
gmIdentity[0], gmIdentity[1], gmIdentity[2], gmIdentity[3],
gmIdentity[4], gmIdentity[5], gmIdentity[6], gmIdentity[7]);
gmIdentityString[NEW_GM_BUF_SIZE-1] = 0;
nla_put_string(skb, pairIndex++, gmIdentityString);
/* End the value map nesting */
nla_nest_end(skb, valueMap);
/* Finalize the message and multicast it */
genlmsg_end(skb, msgHead);
returnValue = genlmsg_multicast(skb, 0, rtc_mcast.id, GFP_ATOMIC);
skb = NULL;
switch(returnValue) {
case 0:
// Success, simply break
break;
case -ESRCH:
// No process was listening, auto-acknowledge the result
printk(KERN_INFO DRIVER_NAME ": No process listening for netlink events; auto-acknowledging ...\n");
ack_grandmaster_change(ptp);
break;
default:
// This is an actual error, print the return code
printk(KERN_INFO DRIVER_NAME ": Failure delivering multicast Netlink message: %d\n",
returnValue);
goto gm_change_fail;
}
gm_change_fail:
if (returnValue != 0) {
printk(KERN_INFO DRIVER_NAME ": GM change event failure %d; auto-acknowledging ...\n", returnValue);
ack_grandmaster_change(ptp);
}
if (NULL != skb) {
nlmsg_free(skb);
skb = NULL;
}
}
/* Method to conditionally transmit a Netlink packet containing one or more
* packets of information from the status FIFO */
static int tx_netlink_status(struct aes3_rx *rx) {
struct sk_buff *skb;
void *msgHead;
int returnValue = 0;
uint32_t status;
/* Make sure we have something to do */
if(rx->statusReadyAes != AES_NEW_STATUS_READY && rx->statusReadyMeter != AES_NEW_STATUS_READY) {
return(returnValue);
}
/* We will send a packet, allocate a socket buffer */
skb = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
if(skb == NULL) return(-ENOMEM);
/* Create the message headers. AES status messages get priority. */
msgHead = genlmsg_put(skb, 0, rx->netlinkSequence++, &events_genl_family, 0, (rx->statusReadyAes == AES_NEW_STATUS_READY ? LABX_AES_EVENTS_C_AES_STATUS_PACKETS : LABX_AES_EVENTS_C_METER_STATUS_PACKETS));
if(msgHead == NULL) {
returnValue = -ENOMEM;
goto tx_failure;
}
/* Write the AES device's ID, properly translated for userspace, to identify the
* message source. The full ID is required since this driver can be used encapsulated
* within any number of more complex devices. */
returnValue = nla_put_u32(skb, LABX_AES_EVENTS_A_AES_DEVICE, new_encode_dev(rx->deviceNode));
if(returnValue != 0) goto tx_failure;
/* AES interrupts get priority. Calling code must make sure to call us multiple
* times if there are multiple statuses to send out. */
if(rx->statusReadyAes == AES_NEW_STATUS_READY) {
/* Clear the AES status flag */
rx->statusReadyAes = AES_STATUS_IDLE;
/* Read the AES rx status register and send it out */
status = XIo_In32(REGISTER_ADDRESS(rx, AES_RX_STREAM_STATUS_REG));
returnValue = nla_put_u32(skb, LABX_AES_EVENTS_A_AES_RX_STATUS, status);
if(returnValue != 0) goto tx_failure;
/* Read the AES tx status register and send it out */
status = XIo_In32(REGISTER_ADDRESS(rx, AES_TX_STREAM_STATUS_REG));
returnValue = nla_put_u32(skb, LABX_AES_EVENTS_A_AES_TX_STATUS, status);
if(returnValue != 0) goto tx_failure;
} else if(rx->statusReadyMeter == AES_NEW_STATUS_READY) {
/* Clear the metering status flag */
rx->statusReadyMeter = AES_STATUS_IDLE;
/* Read the metering rx status register and send it out */
status = XIo_In32(REGISTER_ADDRESS(rx, AES_RX_AUDIO_METER_REG));
returnValue = nla_put_u32(skb, LABX_AES_EVENTS_A_METER_RX_STATUS, status);
if(returnValue != 0) goto tx_failure;
/* Read the metering tx status register and send it out */
status = XIo_In32(REGISTER_ADDRESS(rx, AES_TX_AUDIO_METER_REG));
returnValue = nla_put_u32(skb, LABX_AES_EVENTS_A_METER_TX_STATUS, status);
if(returnValue != 0) goto tx_failure;
}
/* Finalize the message and multicast it */
genlmsg_end(skb, msgHead);
returnValue = genlmsg_multicast(skb, 0, labx_aes_mcast.id, GFP_ATOMIC);
switch(returnValue) {
case 0:
case -ESRCH:
/* Success or no process was listening, simply break */
break;
default:
/* This is an actual error, print the return code */
printk(KERN_INFO DRIVER_NAME ": Failure delivering multicast Netlink message: %d\n", returnValue);
goto tx_failure;
}
tx_failure:
return(returnValue);
}
