From: Dedy Lansky <qca_dlansky@xxxxxxxxxxxxxxxx> supporting p2p_find, p2p_listen and p2p_connect Use updated cfg80211_get_bss API (additional argument) Signed-off-by: Dedy Lansky <qca_dlansky@xxxxxxxxxxxxxxxx> Signed-off-by: Lior David <qca_liord@xxxxxxxxxxxxxxxx> Signed-off-by: Maya Erez <qca_merez@xxxxxxxxxxxxxxxx> --- drivers/net/wireless/ath/wil6210/Makefile | 1 + drivers/net/wireless/ath/wil6210/cfg80211.c | 67 +++++++-- drivers/net/wireless/ath/wil6210/main.c | 6 + drivers/net/wireless/ath/wil6210/p2p.c | 220 ++++++++++++++++++++++++++++ drivers/net/wireless/ath/wil6210/wil6210.h | 31 +++- drivers/net/wireless/ath/wil6210/wmi.c | 80 +++++++++- 6 files changed, 389 insertions(+), 16 deletions(-) create mode 100644 drivers/net/wireless/ath/wil6210/p2p.c diff --git a/drivers/net/wireless/ath/wil6210/Makefile b/drivers/net/wireless/ath/wil6210/Makefile index fdf63d5..11b544b 100644 --- a/drivers/net/wireless/ath/wil6210/Makefile +++ b/drivers/net/wireless/ath/wil6210/Makefile @@ -18,6 +18,7 @@ wil6210-$(CONFIG_WIL6210_TRACING) += trace.o wil6210-y += wil_platform.o wil6210-y += ethtool.o wil6210-y += wil_crash_dump.o +wil6210-y += p2p.o # for tracing framework to find trace.h CFLAGS_trace.o := -I$(src) diff --git a/drivers/net/wireless/ath/wil6210/cfg80211.c b/drivers/net/wireless/ath/wil6210/cfg80211.c index 4a95e1c..80e1482f 100644 --- a/drivers/net/wireless/ath/wil6210/cfg80211.c +++ b/drivers/net/wireless/ath/wil6210/cfg80211.c @@ -18,6 +18,8 @@ #include "wil6210.h" #include "wmi.h" +#define WIL_MAX_ROC_DURATION_MS 5000 + #define CHAN60G(_channel, _flags) { \ .band = IEEE80211_BAND_60GHZ, \ .center_freq = 56160 + (2160 * (_channel)), \ @@ -239,6 +241,20 @@ static int wil_cfg80211_change_iface(struct wiphy *wiphy, { struct wil6210_priv *wil = wiphy_to_wil(wiphy); struct wireless_dev *wdev = wil->wdev; + int rc; + + wil_dbg_misc(wil, "%s() type=%d\n", __func__, type); + + if (netif_running(wil_to_ndev(wil))) { + wil_dbg_misc(wil, "interface is up. resetting...\n"); + mutex_lock(&wil->mutex); + __wil_down(wil); + rc = __wil_up(wil); + mutex_unlock(&wil->mutex); + + if (rc) + return rc; + } switch (type) { case NL80211_IFTYPE_STATION: @@ -274,6 +290,8 @@ static int wil_cfg80211_scan(struct wiphy *wiphy, uint i, n; int rc; + wil_dbg_misc(wil, "%s()\n", __func__); + if (wil->scan_request) { wil_err(wil, "Already scanning\n"); return -EAGAIN; @@ -294,6 +312,14 @@ static int wil_cfg80211_scan(struct wiphy *wiphy, return -EBUSY; } + /* check if scan request is a P2P search request */ + if (wil_scan_is_p2p_search(wil, request)) { + wil->scan_request = request; + return wil_p2p_search(wil, request); + } + + wil_p2p_stop_discovery(wil); + wil_dbg_misc(wil, "Start scan_request 0x%p\n", request); wil_dbg_misc(wil, "SSID count: %d", request->n_ssids); @@ -419,6 +445,7 @@ static int wil_cfg80211_connect(struct wiphy *wiphy, int rc = 0; enum ieee80211_bss_type bss_type = IEEE80211_BSS_TYPE_ESS; + wil_dbg_misc(wil, "%s()\n", __func__); wil_print_connect_params(wil, sme); if (test_bit(wil_status_fwconnecting, wil->status) || @@ -584,6 +611,16 @@ int wil_cfg80211_mgmt_tx(struct wiphy *wiphy, struct wireless_dev *wdev, struct wmi_sw_tx_complete_event evt; } __packed evt; + /* Note, currently we do not support the "wait" parameter, user-space + * must call remain_on_channel before mgmt_tx or listen on a channel + * another way (AP/PCP or connected station) + * in addition we need to check if specified "chan" argument is + * different from currently "listened" channel and fail if it is. + */ + + wil_dbg_misc(wil, "%s()\n", __func__); + print_hex_dump_bytes("mgmt tx frame ", DUMP_PREFIX_OFFSET, buf, len); + cmd = kmalloc(sizeof(*cmd) + len, GFP_KERNEL); if (!cmd) { rc = -ENOMEM; @@ -628,9 +665,11 @@ static enum wmi_key_usage wil_detect_key_usage(struct wil6210_priv *wil, } else { switch (wdev->iftype) { case NL80211_IFTYPE_STATION: + case NL80211_IFTYPE_P2P_CLIENT: rc = WMI_KEY_USE_RX_GROUP; break; case NL80211_IFTYPE_AP: + case NL80211_IFTYPE_P2P_GO: rc = WMI_KEY_USE_TX_GROUP; break; default: @@ -770,16 +809,17 @@ static int wil_remain_on_channel(struct wiphy *wiphy, struct wil6210_priv *wil = wiphy_to_wil(wiphy); int rc; - /* TODO: handle duration */ - wil_info(wil, "%s(%d, %d ms)\n", __func__, chan->center_freq, duration); + wil_dbg_misc(wil, "%s() center_freq=%d, duration=%d\n", __func__, + chan->center_freq, duration); - rc = wmi_set_channel(wil, chan->hw_value); + rc = wil_p2p_listen(wil, duration, chan, cookie); if (rc) return rc; - rc = wmi_rxon(wil, true); + cfg80211_ready_on_channel(wil->wdev, *cookie, chan, duration, + GFP_KERNEL); - return rc; + return 0; } static int wil_cancel_remain_on_channel(struct wiphy *wiphy, @@ -787,13 +827,12 @@ static int wil_cancel_remain_on_channel(struct wiphy *wiphy, u64 cookie) { struct wil6210_priv *wil = wiphy_to_wil(wiphy); - int rc; - wil_info(wil, "%s()\n", __func__); + wil_dbg_misc(wil, "%s()\n", __func__); - rc = wmi_rxon(wil, false); + wil_p2p_cancel_listen(wil, cookie); - return rc; + return 0; } /** @@ -1251,14 +1290,18 @@ static void wil_wiphy_init(struct wiphy *wiphy) { wiphy->max_scan_ssids = 1; wiphy->max_scan_ie_len = WMI_MAX_IE_LEN; + wiphy->max_remain_on_channel_duration = WIL_MAX_ROC_DURATION_MS; wiphy->max_num_pmkids = 0 /* TODO: */; wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_AP) | + BIT(NL80211_IFTYPE_P2P_CLIENT) | + BIT(NL80211_IFTYPE_P2P_GO) | + /* enable this when supporting multi vif + * BIT(NL80211_IFTYPE_P2P_DEVICE) | + */ BIT(NL80211_IFTYPE_MONITOR); - /* TODO: enable P2P when integrated with supplicant: - * BIT(NL80211_IFTYPE_P2P_CLIENT) | BIT(NL80211_IFTYPE_P2P_GO) - */ wiphy->flags |= WIPHY_FLAG_HAVE_AP_SME | + WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL | WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD; dev_dbg(wiphy_dev(wiphy), "%s : flags = 0x%08x\n", __func__, wiphy->flags); diff --git a/drivers/net/wireless/ath/wil6210/main.c b/drivers/net/wireless/ath/wil6210/main.c index 1472978..025751e 100644 --- a/drivers/net/wireless/ath/wil6210/main.c +++ b/drivers/net/wireless/ath/wil6210/main.c @@ -453,6 +453,8 @@ int wil_priv_init(struct wil6210_priv *wil) wil->bcast_vring = -1; setup_timer(&wil->connect_timer, wil_connect_timer_fn, (ulong)wil); setup_timer(&wil->scan_timer, wil_scan_timer_fn, (ulong)wil); + setup_timer(&wil->p2p.discovery_timer, wil_p2p_discovery_timer_fn, + (ulong)wil); INIT_WORK(&wil->disconnect_worker, wil_disconnect_worker); INIT_WORK(&wil->wmi_event_worker, wmi_event_worker); @@ -513,8 +515,10 @@ void wil_priv_deinit(struct wil6210_priv *wil) wil_set_recovery_state(wil, fw_recovery_idle); del_timer_sync(&wil->scan_timer); + del_timer_sync(&wil->p2p.discovery_timer); cancel_work_sync(&wil->disconnect_worker); cancel_work_sync(&wil->fw_error_worker); + cancel_work_sync(&wil->p2p.discovery_expired_work); mutex_lock(&wil->mutex); wil6210_disconnect(wil, NULL, WLAN_REASON_DEAUTH_LEAVING, false); mutex_unlock(&wil->mutex); @@ -979,6 +983,8 @@ int __wil_down(struct wil6210_priv *wil) } wil_enable_irq(wil); + wil_p2p_stop_discovery(wil); + if (wil->scan_request) { wil_dbg_misc(wil, "Abort scan_request 0x%p\n", wil->scan_request); diff --git a/drivers/net/wireless/ath/wil6210/p2p.c b/drivers/net/wireless/ath/wil6210/p2p.c new file mode 100644 index 0000000..974bf84 --- /dev/null +++ b/drivers/net/wireless/ath/wil6210/p2p.c @@ -0,0 +1,220 @@ +/* + * Copyright (c) 2014-2016 Qualcomm Atheros, Inc. + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include "wil6210.h" +#include "wmi.h" + +#define P2P_WILDCARD_SSID "DIRECT-" +#define P2P_DMG_SOCIAL_CHANNEL 2 +#define P2P_SEARCH_DURATION_MS 500 +#define P2P_DEFAULT_BI 100 + +int wil_scan_is_p2p_search(struct wil6210_priv *wil, + struct cfg80211_scan_request *request) +{ + /* need P2P_DEVICE changes to make this work */ + return 0; +} + +void wil_p2p_discovery_timer_fn(ulong x) +{ + struct wil6210_priv *wil = (void *)x; + + wil_dbg_misc(wil, "%s\n", __func__); + + schedule_work(&wil->p2p.discovery_expired_work); +} + +int wil_p2p_search(struct wil6210_priv *wil, + struct cfg80211_scan_request *request) +{ + int rc; + struct wil_p2p_info *p2p = &wil->p2p; + + wil_dbg_misc(wil, "%s: channel %d\n", + __func__, P2P_DMG_SOCIAL_CHANNEL); + + mutex_lock(&wil->mutex); + + if (p2p->discovery_started) { + wil_err(wil, "%s: search failed. discovery already ongoing\n", + __func__); + rc = -EBUSY; + goto out; + } + + rc = wmi_p2p_cfg(wil, P2P_DMG_SOCIAL_CHANNEL, P2P_DEFAULT_BI); + if (rc) { + wil_err(wil, "%s: wmi_p2p_cfg failed\n", __func__); + goto out; + } + + rc = wmi_set_ssid(wil, strlen(P2P_WILDCARD_SSID), P2P_WILDCARD_SSID); + if (rc) { + wil_err(wil, "%s: wmi_set_ssid failed\n", __func__); + goto out_stop; + } + + /* Set application IE to probe request and probe response */ + rc = wmi_set_ie(wil, WMI_FRAME_PROBE_REQ, + request->ie_len, request->ie); + if (rc) { + wil_err(wil, "%s: wmi_set_ie(WMI_FRAME_PROBE_REQ) failed\n", + __func__); + goto out_stop; + } + + /* supplicant doesn't provide Probe Response IEs. As a workaround - + * re-use Probe Request IEs + */ + rc = wmi_set_ie(wil, WMI_FRAME_PROBE_RESP, + request->ie_len, request->ie); + if (rc) { + wil_err(wil, "%s: wmi_set_ie(WMI_FRAME_PROBE_RESP) failed\n", + __func__); + goto out_stop; + } + + rc = wmi_start_search(wil); + if (rc) { + wil_err(wil, "%s: wmi_start_search failed\n", __func__); + goto out_stop; + } + + p2p->discovery_started = 1; + INIT_WORK(&p2p->discovery_expired_work, wil_p2p_search_expired); + mod_timer(&p2p->discovery_timer, + jiffies + msecs_to_jiffies(P2P_SEARCH_DURATION_MS)); + +out_stop: + if (rc) + wmi_stop_discovery(wil); + +out: + mutex_unlock(&wil->mutex); + return rc; +} + +int wil_p2p_listen(struct wil6210_priv *wil, unsigned int duration, + struct ieee80211_channel *chan, u64 *cookie) +{ + struct wil_p2p_info *p2p = &wil->p2p; + u8 channel = P2P_DMG_SOCIAL_CHANNEL; + int rc; + + if (chan) + channel = chan->hw_value; + + wil_dbg_misc(wil, "%s: duration %d\n", __func__, duration); + + mutex_lock(&wil->mutex); + + if (p2p->discovery_started) { + wil_err(wil, "%s: discovery already ongoing\n", __func__); + rc = -EBUSY; + goto out; + } + + rc = wmi_p2p_cfg(wil, channel, P2P_DEFAULT_BI); + if (rc) { + wil_err(wil, "%s: wmi_p2p_cfg failed\n", __func__); + goto out; + } + + rc = wmi_set_ssid(wil, strlen(P2P_WILDCARD_SSID), P2P_WILDCARD_SSID); + if (rc) { + wil_err(wil, "%s: wmi_set_ssid failed\n", __func__); + goto out_stop; + } + + rc = wmi_start_listen(wil); + if (rc) { + wil_err(wil, "%s: wmi_start_listen failed\n", __func__); + goto out_stop; + } + + memcpy(&p2p->listen_chan, chan, sizeof(*chan)); + *cookie = ++p2p->cookie; + + p2p->discovery_started = 1; + INIT_WORK(&p2p->discovery_expired_work, wil_p2p_listen_expired); + mod_timer(&p2p->discovery_timer, + jiffies + msecs_to_jiffies(duration)); + +out_stop: + if (rc) + wmi_stop_discovery(wil); + +out: + mutex_unlock(&wil->mutex); + return rc; +} + +void wil_p2p_stop_discovery(struct wil6210_priv *wil) +{ + struct wil_p2p_info *p2p = &wil->p2p; + + if (p2p->discovery_started) { + del_timer_sync(&p2p->discovery_timer); + p2p->discovery_started = 0; + wmi_stop_discovery(wil); + } +} + +void wil_p2p_cancel_listen(struct wil6210_priv *wil, u64 cookie) +{ + struct wil_p2p_info *p2p = &wil->p2p; + + if (cookie != p2p->cookie) + wil_info(wil, "%s: Cookie mismatch: 0x%016llx vs. 0x%016llx\n", + __func__, p2p->cookie, cookie); + + wil_p2p_stop_discovery(wil); + cfg80211_remain_on_channel_expired(wil->wdev, + p2p->cookie, + &p2p->listen_chan, + GFP_KERNEL); +} + +void wil_p2p_listen_expired(struct work_struct *work) +{ + struct wil_p2p_info *p2p = container_of(work, + struct wil_p2p_info, discovery_expired_work); + struct wil6210_priv *wil = container_of(p2p, + struct wil6210_priv, p2p); + + wil_dbg_misc(wil, "%s()\n", __func__); + + wil_p2p_stop_discovery(wil); + cfg80211_remain_on_channel_expired(wil->wdev, + p2p->cookie, + &p2p->listen_chan, + GFP_KERNEL); +} + +void wil_p2p_search_expired(struct work_struct *work) +{ + struct wil_p2p_info *p2p = container_of(work, + struct wil_p2p_info, discovery_expired_work); + struct wil6210_priv *wil = container_of(p2p, + struct wil6210_priv, p2p); + + wil_dbg_misc(wil, "%s()\n", __func__); + + wil_p2p_stop_discovery(wil); + cfg80211_scan_done(wil->scan_request, 0); + wil->scan_request = NULL; +} diff --git a/drivers/net/wireless/ath/wil6210/wil6210.h b/drivers/net/wireless/ath/wil6210/wil6210.h index 69d970a..0aba86c 100644 --- a/drivers/net/wireless/ath/wil6210/wil6210.h +++ b/drivers/net/wireless/ath/wil6210/wil6210.h @@ -453,6 +453,14 @@ struct wil_tid_crypto_rx { struct wil_tid_crypto_rx_single key_id[4]; }; +struct wil_p2p_info { + struct ieee80211_channel listen_chan; + u8 discovery_started; + u64 cookie; + struct timer_list discovery_timer; /* listen/search duration */ + struct work_struct discovery_expired_work; /* listen/search expire */ +}; + enum wil_sta_status { wil_sta_unused = 0, wil_sta_conn_pending = 1, @@ -606,6 +614,8 @@ struct wil6210_priv { struct pmc_ctx pmc; bool pbss; + + struct wil_p2p_info p2p; }; #define wil_to_wiphy(i) (i->wdev->wiphy) @@ -731,7 +741,6 @@ int wmi_add_cipher_key(struct wil6210_priv *wil, u8 key_index, int wmi_echo(struct wil6210_priv *wil); int wmi_set_ie(struct wil6210_priv *wil, u8 type, u16 ie_len, const void *ie); int wmi_rx_chain_add(struct wil6210_priv *wil, struct vring *vring); -int wmi_p2p_cfg(struct wil6210_priv *wil, int channel); int wmi_rxon(struct wil6210_priv *wil, bool on); int wmi_get_temperature(struct wil6210_priv *wil, u32 *t_m, u32 *t_r); int wmi_disconnect_sta(struct wil6210_priv *wil, const u8 *mac, u16 reason, @@ -754,6 +763,26 @@ void wil_unmask_irq(struct wil6210_priv *wil); void wil_configure_interrupt_moderation(struct wil6210_priv *wil); void wil_disable_irq(struct wil6210_priv *wil); void wil_enable_irq(struct wil6210_priv *wil); + +/* P2P */ +int wil_scan_is_p2p_search(struct wil6210_priv *wil, + struct cfg80211_scan_request *request); +void wil_p2p_discovery_timer_fn(ulong x); +int wil_p2p_search(struct wil6210_priv *wil, + struct cfg80211_scan_request *request); +int wil_p2p_listen(struct wil6210_priv *wil, unsigned int duration, + struct ieee80211_channel *chan, u64 *cookie); +void wil_p2p_stop_discovery(struct wil6210_priv *wil); +void wil_p2p_cancel_listen(struct wil6210_priv *wil, u64 cookie); +void wil_p2p_listen_expired(struct work_struct *work); +void wil_p2p_search_expired(struct work_struct *work); + +/* WMI for P2P */ +int wmi_p2p_cfg(struct wil6210_priv *wil, int channel, int bi); +int wmi_start_listen(struct wil6210_priv *wil); +int wmi_start_search(struct wil6210_priv *wil); +int wmi_stop_discovery(struct wil6210_priv *wil); + int wil_cfg80211_mgmt_tx(struct wiphy *wiphy, struct wireless_dev *wdev, struct cfg80211_mgmt_tx_params *params, u64 *cookie); diff --git a/drivers/net/wireless/ath/wil6210/wmi.c b/drivers/net/wireless/ath/wil6210/wmi.c index db7d2b6..4a1cdd2 100644 --- a/drivers/net/wireless/ath/wil6210/wmi.c +++ b/drivers/net/wireless/ath/wil6210/wmi.c @@ -368,6 +368,8 @@ static void wmi_evt_rx_mgmt(struct wil6210_priv *wil, int id, void *d, int len) wil_hex_dump_wmi("IE ", DUMP_PREFIX_OFFSET, 16, 1, ie_buf, ie_len, true); + wil_dbg_wmi(wil, "Capability info : 0x%04x\n", cap); + bss = cfg80211_inform_bss_frame(wiphy, channel, rx_mgmt_frame, d_len, signal, GFP_KERNEL); if (bss) { @@ -1072,14 +1074,86 @@ int wmi_get_channel(struct wil6210_priv *wil, int *channel) return 0; } -int wmi_p2p_cfg(struct wil6210_priv *wil, int channel) +int wmi_p2p_cfg(struct wil6210_priv *wil, int channel, int bi) { + int rc; struct wmi_p2p_cfg_cmd cmd = { - .discovery_mode = WMI_DISCOVERY_MODE_NON_OFFLOAD, + .discovery_mode = WMI_DISCOVERY_MODE_PEER2PEER, + .bcon_interval = cpu_to_le16(bi), .channel = channel - 1, }; + struct { + struct wmi_cmd_hdr wmi; + struct wmi_p2p_cfg_done_event evt; + } __packed reply; + + wil_dbg_wmi(wil, "sending WMI_P2P_CFG_CMDID\n"); + + rc = wmi_call(wil, WMI_P2P_CFG_CMDID, &cmd, sizeof(cmd), + WMI_P2P_CFG_DONE_EVENTID, &reply, sizeof(reply), 300); + if (!rc && reply.evt.status != WMI_FW_STATUS_SUCCESS) { + wil_err(wil, "P2P_CFG failed. status %d\n", reply.evt.status); + rc = -EINVAL; + } + + return rc; +} + +int wmi_start_listen(struct wil6210_priv *wil) +{ + int rc; + struct { + struct wmi_cmd_hdr wmi; + struct wmi_listen_started_event evt; + } __packed reply; + + wil_dbg_wmi(wil, "sending WMI_START_LISTEN_CMDID\n"); + + rc = wmi_call(wil, WMI_START_LISTEN_CMDID, NULL, 0, + WMI_LISTEN_STARTED_EVENTID, &reply, sizeof(reply), 300); + if (!rc && reply.evt.status != WMI_FW_STATUS_SUCCESS) { + wil_err(wil, "device failed to start listen. status %d\n", + reply.evt.status); + rc = -EINVAL; + } - return wmi_send(wil, WMI_P2P_CFG_CMDID, &cmd, sizeof(cmd)); + return rc; +} + +int wmi_start_search(struct wil6210_priv *wil) +{ + int rc; + struct { + struct wmi_cmd_hdr wmi; + struct wmi_search_started_event evt; + } __packed reply; + + wil_dbg_wmi(wil, "sending WMI_START_SEARCH_CMDID\n"); + + rc = wmi_call(wil, WMI_START_SEARCH_CMDID, NULL, 0, + WMI_SEARCH_STARTED_EVENTID, &reply, sizeof(reply), 300); + if (!rc && reply.evt.status != WMI_FW_STATUS_SUCCESS) { + wil_err(wil, "device failed to start search. status %d\n", + reply.evt.status); + rc = -EINVAL; + } + + return rc; +} + +int wmi_stop_discovery(struct wil6210_priv *wil) +{ + int rc; + + wil_dbg_wmi(wil, "sending WMI_DISCOVERY_STOP_CMDID\n"); + + rc = wmi_call(wil, WMI_DISCOVERY_STOP_CMDID, NULL, 0, + WMI_DISCOVERY_STOPPED_EVENTID, NULL, 0, 100); + + if (rc) + wil_err(wil, "Failed to stop discovery\n"); + + return rc; } int wmi_del_cipher_key(struct wil6210_priv *wil, u8 key_index, -- 1.8.5.2 -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html