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mac80211-hwsim: Add support for HWSIM_ATTR_DESTROY_RADIO_ON_CLOSE

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Add support for new attribute HWSIM_ATTR_DESTROY_RADIO_ON_CLOSE
which can be set by the user space component. The attribute
will cause the kernel to destroy all those radios that were
created by a process if that process dies. The old behaviour
i.e., radios are persistent is still the default.

Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Jukka Rissanen 2014-10-09 15:27:51 +03:00 committed by Johannes Berg
parent 0f791eb47f
commit e9ed49bf4c
2 changed files with 40 additions and 3 deletions
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40
drivers/net/wireless/mac80211_hwsim.c
View File

@ -412,6 +412,9 @@ struct mac80211_hwsim_data {
struct mac_address addresses[2];
int channels, idx;
bool use_chanctx;
bool destroy_on_close;
struct work_struct destroy_work;
u32 portid;
struct ieee80211_channel *tmp_chan;
struct delayed_work roc_done;
@ -496,6 +499,7 @@ static const struct nla_policy hwsim_genl_policy[HWSIM_ATTR_MAX + 1] = {
[HWSIM_ATTR_REG_CUSTOM_REG] = { .type = NLA_U32 },
[HWSIM_ATTR_REG_STRICT_REG] = { .type = NLA_FLAG },
[HWSIM_ATTR_SUPPORT_P2P_DEVICE] = { .type = NLA_FLAG },
[HWSIM_ATTR_DESTROY_RADIO_ON_CLOSE] = { .type = NLA_FLAG },
};
static void mac80211_hwsim_tx_frame(struct ieee80211_hw *hw,
@ -1947,7 +1951,8 @@ static struct ieee80211_ops mac80211_hwsim_mchan_ops;
static int mac80211_hwsim_create_radio(int channels, const char *reg_alpha2,
const struct ieee80211_regdomain *regd,
bool reg_strict, bool p2p_device,
bool use_chanctx)
bool use_chanctx, bool destroy_on_close,
u32 portid)
{
int err;
u8 addr[ETH_ALEN];
@ -2007,6 +2012,8 @@ static int mac80211_hwsim_create_radio(int channels, const char *reg_alpha2,
data->channels = channels;
data->use_chanctx = use_chanctx;
data->idx = idx;
data->destroy_on_close = destroy_on_close;
data->portid = portid;
if (data->use_chanctx) {
hw->wiphy->max_scan_ssids = 255;
@ -2434,6 +2441,7 @@ static int hwsim_create_radio_nl(struct sk_buff *msg, struct genl_info *info)
const struct ieee80211_regdomain *regd = NULL;
bool reg_strict = info->attrs[HWSIM_ATTR_REG_STRICT_REG];
bool p2p_device = info->attrs[HWSIM_ATTR_SUPPORT_P2P_DEVICE];
bool destroy_on_close = info->attrs[HWSIM_ATTR_DESTROY_RADIO_ON_CLOSE];
bool use_chanctx;
if (info->attrs[HWSIM_ATTR_CHANNELS])
@ -2456,7 +2464,8 @@ static int hwsim_create_radio_nl(struct sk_buff *msg, struct genl_info *info)
}
return mac80211_hwsim_create_radio(chans, alpha2, regd, reg_strict,
p2p_device, use_chanctx);
p2p_device, use_chanctx,
destroy_on_close, info->snd_portid);
}
static int hwsim_destroy_radio_nl(struct sk_buff *msg, struct genl_info *info)
@ -2514,6 +2523,29 @@ static const struct genl_ops hwsim_ops[] = {
},
};
static void destroy_radio(struct work_struct *work)
{
struct mac80211_hwsim_data *data =
container_of(work, struct mac80211_hwsim_data, destroy_work);
mac80211_hwsim_destroy_radio(data);
}
static void remove_user_radios(u32 portid)
{
struct mac80211_hwsim_data *entry, *tmp;
spin_lock_bh(&hwsim_radio_lock);
list_for_each_entry_safe(entry, tmp, &hwsim_radios, list) {
if (entry->destroy_on_close && entry->portid == portid) {
list_del(&entry->list);
INIT_WORK(&entry->destroy_work, destroy_radio);
schedule_work(&entry->destroy_work);
}
}
spin_unlock_bh(&hwsim_radio_lock);
}
static int mac80211_hwsim_netlink_notify(struct notifier_block *nb,
unsigned long state,
void *_notify)
@ -2523,6 +2555,8 @@ static int mac80211_hwsim_netlink_notify(struct notifier_block *nb,
if (state != NETLINK_URELEASE)
return NOTIFY_DONE;
remove_user_radios(notify->portid);
if (notify->portid == wmediumd_portid) {
printk(KERN_INFO "mac80211_hwsim: wmediumd released netlink"
" socket, switching to perfect channel medium\n");
@ -2676,7 +2710,7 @@ static int __init init_mac80211_hwsim(void)
err = mac80211_hwsim_create_radio(channels, reg_alpha2,
regd, reg_strict,
support_p2p_device,
channels > 1);
channels > 1, false, 0);
if (err < 0)
goto out_free_radios;
}

3
drivers/net/wireless/mac80211_hwsim.h
View File

@ -111,6 +111,8 @@ enum {
* @HWSIM_ATTR_USE_CHANCTX: used with the %HWSIM_CMD_CREATE_RADIO
* command to force use of channel contexts even when only a
* single channel is supported
* @HWSIM_ATTR_DESTROY_RADIO_ON_CLOSE: used with the %HWSIM_CMD_CREATE_RADIO
* command to force radio removal when process that created the radio dies
* @__HWSIM_ATTR_MAX: enum limit
*/
@ -132,6 +134,7 @@ enum {
HWSIM_ATTR_REG_STRICT_REG,
HWSIM_ATTR_SUPPORT_P2P_DEVICE,
HWSIM_ATTR_USE_CHANCTX,
HWSIM_ATTR_DESTROY_RADIO_ON_CLOSE,
__HWSIM_ATTR_MAX,
};
#define HWSIM_ATTR_MAX (__HWSIM_ATTR_MAX - 1)